WO2012029912A1 - 発光装置、及び発光装置用パッケージアレイ - Google Patents
発光装置、及び発光装置用パッケージアレイ Download PDFInfo
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- WO2012029912A1 WO2012029912A1 PCT/JP2011/069918 JP2011069918W WO2012029912A1 WO 2012029912 A1 WO2012029912 A1 WO 2012029912A1 JP 2011069918 W JP2011069918 W JP 2011069918W WO 2012029912 A1 WO2012029912 A1 WO 2012029912A1
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- Prior art keywords
- light emitting
- emitting device
- frame
- terminal
- recess
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- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/38—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes with a particular shape
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- H01L24/93—Batch processes
- H01L24/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/483—Containers
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Definitions
- the technology disclosed herein relates to a light emitting device including a light emitting element and a package array for the light emitting device.
- a light emitting device including a light emitting element for example, a light emitting diode or a laser diode
- a light emitting device is widely used as a light source for a backlight for a liquid crystal television, a lighting fixture, or an optical communication device.
- a light emitting device is mounted on the mounting surface of the mounting substrate.
- light emitting devices are classified into a top view type and a side view type according to the direction in which the light emitted from the light emitting element is extracted.
- the top-view type light emitting device light emitted from the light emitting element 10 is extracted in a direction perpendicular to the mounting surface.
- the side-view type light emitting device light emitted from the light emitting element is extracted in a direction parallel to the mounting surface.
- the light emitting device of Patent Document 1 is formed in a rectangular parallelepiped shape, and includes a bottom surface that is in contact with the mounting surface, a top surface that is a light emitting surface facing the bottom surface, and four side surfaces that are continuous with the bottom surface and the top surface. And having. Four terminals are exposed at four corners formed by the bottom surface and the four side surfaces, and these four terminals are fixed to the mounting substrate via solder. Accordingly, the top view type light emitting device can be firmly fixed to the mounting substrate.
- Patent Document 1 When the method of Patent Document 1 is applied to a side-view type light emitting device, the light amount of the light emitting device may be reduced.
- one of the four side surfaces (hereinafter referred to as “front surface”) is a light emission surface, and light is emitted from a front opening formed on the front surface. For this reason, if two terminals are provided at two corners on the front side, the area of the front opening is reduced, and the light amount of the light emitting device is reduced.
- the technology disclosed herein has been made in view of the above-described situation, and an object thereof is to provide a side-view type light-emitting device and a light-emitting device package array capable of suppressing a decrease in light amount and a decrease in intensity.
- a light emitting device disclosed herein includes a substantially rectangular parallelepiped package and a light emitting element mounted on the package.
- the package includes a molded body and first and second leads embedded in the molded body.
- the first lead has a first terminal portion exposed from the molded body at the boundary between the first side surface of the package, the bottom surface, and the back surface facing the light emitting surface continuous with the bottom surface.
- the second lead has a second terminal portion exposed from the molded body at the boundary between the second side surface facing the first side surface, the bottom surface, and the back surface.
- the first terminal portion has a first recess that opens to the first side surface, the bottom surface, and the back surface.
- the second terminal portion has a second recess that opens to the second side surface, the bottom surface, and the back surface.
- FIG. 2 is a perspective view of FIG. 1.
- FIG. 3 is a perspective view of FIG. 2. It is a top view of bottom face 20A of light-emitting device 100 concerning a 1st embodiment. It is an expansion perspective view of the 1st terminal crevice 42S concerning a 1st embodiment. 1 is a side perspective view of a light emitting device 100 according to a first embodiment. It is an expansion perspective view of the 2nd terminal crevice 52S concerning a 1st embodiment.
- FIG. 14 is a cross-sectional view taken along line AA in FIG. It is a figure for demonstrating the manufacturing method of the light-emitting device 100 which concerns on 1st Embodiment.
- first Embodiment (Outline of the first embodiment) 1st Embodiment demonstrates the side view type light-emitting device which can suppress the fall of light quantity and the fall of intensity
- the light emitting device has two terminals exposed at two corners formed by a back surface, a bottom surface, and two side surfaces, and does not have a terminal exposed on the front surface or the top surface. Each of the two terminals is formed with a recess capable of accommodating solder.
- the configuration of the light-emitting device, the mounting substrate, and the circuit board, and the method for manufacturing the light-emitting device will be sequentially described.
- FIG. 1 is a perspective view of the light emitting device 100 according to the first embodiment as viewed from the front.
- FIG. 2 is a perspective view of the light emitting device 100 according to the first embodiment as viewed from the rear.
- the light emitting device 100 includes a light emitting element 10 and a package 20.
- the light emitting device 100 according to the present embodiment is a so-called side view type light emitting device, and light emitted from the light emitting element 10 is extracted in a direction parallel to a mounting surface 200A (see FIG. 9) of a mounting substrate 200 described later. It is.
- the outer shape of the light emitting device 100 is a substantially rectangular parallelepiped shape extending along a first direction parallel to the mounting surface 200A.
- the size of the light emitting device 100 is about 3 mm in the first direction, about 1 mm in the direction orthogonal to the first direction and parallel to the mounting surface 200A (hereinafter referred to as “second direction”). It is about 1 mm in a direction orthogonal to the first direction and the second direction (that is, a direction orthogonal to the mounting surface 200A, hereinafter referred to as “third direction”).
- the size of the light emitting device 100 is not limited to this.
- the light emitting device 100 according to the present embodiment is a side view type, and the ratio of the height in the third direction to the depth in the second direction is larger than that of the top view type. That is, the side view type is taller than the top view type. Therefore, the light-emitting device 100 according to the present embodiment has a feature that tends to collapse.
- the light emitting element 10 is placed on the package 20.
- the light emitting element 10 is electrically connected to the package 20 via the first wire 11 and the second wire 12.
- the light emitting element 10 is formed in a plate shape and is arranged perpendicular to the second direction.
- the light emitted from the light emitting element 10 is extracted in a direction parallel to the second direction from a front opening 20F described later.
- the light emitting element 10 is, for example, a semiconductor light emitting element called a so-called light emitting diode.
- a semiconductor light emitting element called a so-called light emitting diode.
- an element having a semiconductor such as GaAlN, ZnS, SnSe, SiC, GaP, GaAlAs, AlN, InN, AlInGaP, InGaN, GaN, or AlInGaN on the substrate is preferably used. It is not limited.
- the face-up structure or the face-down structure can be adopted for the light emitting element 10.
- the size of the light-emitting element 10 is not particularly limited, but is 350 ⁇ m square, 500 ⁇ m square, 1 mm square, or the like.
- the outer shape of the package 20 has a substantially rectangular parallelepiped shape extending along the first direction.
- Package 20 includes a bottom surface 20A, a top surface 20B, and the front 20C, and a rear 20D, the first side surface 20E 1, and a second side face 20E 2.
- the bottom surface 20A is in contact with the mounting surface 200A (see FIG. 9).
- the upper surface 20B is provided to face the bottom surface 20A.
- the front surface 20C is a light emitting surface that is continuous with the bottom surface 20A and the top surface 20B.
- the front surface 20C has a front surface opening 20F.
- the front opening 20 ⁇ / b> F guides light emitted from the light emitting element 10 to the outside of the package 20.
- the light emitting element 10 is mounted on the first connection surface 41A (see FIG. 3) exposed inside the front opening 20F.
- the back surface 20D is connected to the bottom surface 20A and the top surface 20B, and is provided to face the front surface 20C.
- the back surface 20D is perpendicular to the second direction.
- the boundary between the back surface 20D and the bottom surface 20A is parallel to the first direction.
- the first side surface 20E 1 is continuous with the back surface 20D and the front surface 20C.
- the second side surface 20E 2 is arranged opposite to the first side 20E 1.
- First side 20E 1 and a second side face 20E 2 is perpendicular to the first direction.
- the package 20 includes a molded body 30, a first lead 40, a second lead 50, and a sealing resin 60.
- the molded body 30 forms the outer shape of the package 20.
- the molded body 30 is made of an insulating material that has heat resistance and appropriate strength, and that hardly emits light emitted from the light emitting element 10 or external light.
- a triazine derivative epoxy resin which is a thermosetting resin is suitable.
- Such a thermosetting resin may contain an acid anhydride, an antioxidant, a release material, a light reflecting member, an inorganic filler, a curing catalyst, a light stabilizer, and a lubricant.
- titanium dioxide filled with 0 to 90 wt%, preferably 10 to 60 wt% can be used.
- the material of the molded body 30 is not limited to this.
- thermosetting resins at least selected from epoxy resins, modified epoxy resins, silicone resins, modified silicone resins, acrylate resins, and urethane resins.
- One kind of resin can be used.
- an epoxy resin, a modified epoxy resin, a silicone resin, and a modified silicone resin are suitable as the material of the molded body 30.
- a thermoplastic resin such as a liquid crystal polymer, a polyphthalamide resin, or polybutylene terephthalate (PBT) may be used.
- the first lead 40 and the second lead 50 are preferably made of a material having a relatively large thermal conductivity (for example, about 200 W / (m ⁇ K) or more). Thereby, the heat generated from the light emitting element 10 can be efficiently transmitted.
- a material for example, a single layer or a plurality of metals such as Ni, Au, Cu, Ag, Mo, W, aluminum, gold, iron, or an alloy such as iron-nickel alloy, phosphor bronze, iron-containing copper, etc. Layers can be used.
- the surfaces of the first lead 40 and the second lead 50 may be plated.
- first lead 40 and the second lead 50 are embedded in the molded body 30, and only a part of the first lead 40 and the second lead 50 is exposed from the molded body 30. That is, only a part of the first lead 40 and the second lead 50 is observed from the outside of the package 20.
- each of the first lead 40 and the second lead 50 has one external electrode (a first terminal portion 42 and a second terminal portion 52 described later, see FIG. 4) observed from the outside of the package 20 one by one. Yes. In the present embodiment, there are no external electrodes observed from the outside of the package 20 other than the two external electrodes. The configuration of the first lead 40 and the second lead 50 will be described later.
- sealing resin 60 is filled in the front opening 20F and seals the light emitting element 10.
- a resin having translucency for example, polyolefin resin, polycarbonate resin, polystyrene resin, epoxy resin, acrylic resin, acrylate resin, methacrylic resin (PMMA, etc.), urethane resin, polyimide resin.
- At least one resin selected from polynorbornene resin, fluororesin, silicone resin, modified silicone resin, modified epoxy resin, and the like can be used.
- such a material may contain, for example, a phosphor or a pigment, a filler, a diffusing material, or the like described in WO2006 / 038502 and JP2006-229055.
- FIG. 3 is a perspective view of FIG.
- FIG. 4 is a perspective view of FIG.
- FIG. 5 is a plan view of the bottom surface 20A of the light emitting device 100 according to the first embodiment. 3 and 4, the contour of the molded body 30 is shown.
- the first lead 40 includes a first connection part 41, a first terminal part 42, and a base part 43.
- the first terminal portion 42 and the base portion 43 are integrally connected to the first connection portion 41.
- the 1st connection part 41 is formed in plate shape, and is arrange
- the first connection portion 41 has a first connection surface 41 ⁇ / b> A that is exposed from the molded body 30.
- the first connection surface 41A is exposed from the molded body 30 inside the front opening 20F.
- the light emitting element 10 is placed on the first connection surface 41A (that is, the first connection surface 41A becomes a placement surface on which the light emitting element 10 is placed) and the first wire 11 is connected. Yes.
- the first connection portion 41 is electrically connected to the light emitting element 10 (that is, the first connection portion 41 is a placement portion on which the light emitting element 10 is placed).
- the first connection surface 41A is sealed with a sealing resin 60 (see FIG. 1).
- the first terminal portion 42 is formed in a cubic shape and is coupled to the lower end portion of the first connection portion 41 on the first side surface 20E 1 side.
- the first terminal portion 42, the bottom surface 20A, is exposed from the molded body 30 in the rear 20D and the first boundary of the side 20E 1, functions as an external electrode of the light emitting device 100.
- the first terminal portion 42 includes a first end surface 42A, a second end surface 42B, a third end surface 42C, and a first terminal recess 42S.
- the first end surface 42A is exposed from the molded body 30 on the back surface 20D of the package 20.
- the first end surface 42A forms part of the back surface 20D.
- the second end face 42 ⁇ / b> B is exposed from the molded body 30 on the first side face 20 ⁇ / b> E 1 of the package 20.
- the second end face 42B forms a first part of the side surface 20E 1.
- the third end surface 42 ⁇ / b> C is exposed from the molded body 30 on the bottom surface 20 ⁇ / b> A of the package 20.
- the third end face 42C forms part of the bottom face 20A.
- the first terminal recess 42S is a notch formed in the bottom surface 20A, the rear 20D and the first boundary of the side 20E 1.
- the first terminal recess 42S is a bottom 20A, and is opened continuous to each of the three sides of the back 20D and first side 20E 1.
- solder (a part of the first solder fillet 301, see FIG. 10) is accommodated in the first terminal recess 42S.
- FIG. 6 is an enlarged perspective view of the first terminal recess 42S according to the first embodiment.
- the first direction of the first terminal recess 42S i.e., a direction perpendicular to the first side face 20E 1
- depth m 1 in the second direction of the first terminal recess 42S i.e., back surface 20D Smaller than the depth n 1 in the direction perpendicular to Therefore, the solder accommodated in the first terminal recess 42S has a shape that is longer in the second direction than in the first direction.
- first first interior wall 421 parallel to the side surface 20E 1, and a second inner wall 422 parallel to the back surface 20D is formed.
- the first inner wall 421 and the second inner wall 422 are connected to the solder accommodated in the first terminal recess 42S.
- Base part 43 The base portion 43 is connected to the bottom surface 20 ⁇ / b> A side of the first connection portion 41, that is, the lower end portion of the first connection portion 41.
- the base portion 43 is a base of the light emitting device 100 and functions as a “weight” that makes the light emitting device 100 that is tall and easily fall down difficult to fall.
- FIG. 7 is a side perspective view of the light emitting device 100 according to the first embodiment.
- the center of gravity S of the base portion 43 is located on the bottom surface 20A side with respect to the center T of the molded body 30 in the third direction (that is, the direction perpendicular to the bottom surface 20A).
- the light emitting device 100 has a low center of gravity.
- the center of gravity U of the light emitting device when the base portion 43 is present is the same as that of the light emitting device when the base portion 43 is not present. It is lower than the center of gravity U ′.
- the base portion 43 also functions as a heat sink that releases heat generated from the light emitting element 10. Specifically, the base portion 43 is exposed from the molded body 30 on the bottom surface 20 ⁇ / b> A and the back surface 20 ⁇ / b> D of the package 20. As shown in FIGS. 4 and 5, the base portion 43 has a first exposed surface 43A exposed from the molded body 30 on the back surface 20D and a second exposed surface 43B exposed from the molded body 30 on the bottom surface 20A. The first exposed surface 43A forms part of the back surface 20D, and the second exposed surface 43B forms part of the bottom surface 20A. When the light emitting device 100 is mounted, the first exposed surface 43A is exposed to the outside of the light emitting device 100, and the second exposed surface 43B is in contact with the mounting surface 200A (see FIG. 10).
- the area of the first exposed surface 43A is larger than the area of the second exposed surface 43B. That is, the area where the base part 43 is exposed on the back surface 20D is larger than the area where the base part 43 is exposed on the bottom surface 20A.
- the lead 40 according to the present embodiment is exposed in a larger area on the back surface 20D than the bottom surface 20A.
- the base part 43 has the recessed part 43S opened continuously from the bottom face 20A and the back face 20D.
- the recess 43S is a notch formed at a part of the boundary between the bottom surface 20A and the back surface 20D.
- the recess 43S has a first inner wall 43Sa, a second inner wall 43Sb, and a third inner wall 43Sc.
- the first inner wall 43Sa is orthogonal to the first direction.
- the second inner wall 43Sb faces the first inner wall 43Sa.
- the third inner wall 43Sc is orthogonal to the second direction and is continuous with the first inner wall 43Sa and the second inner wall 43Sb.
- a third solder fillet 303a is formed on the first inner wall 43Sa, and a third solder fillet 303b is formed on the second inner wall 43Sb (see FIG. 10).
- the third inner wall 43Sc is exposed to the outside of the light emitting device 100.
- the second lead 50 includes a second connection part 51 and a second terminal part 52.
- the second connection portion 51 and the second terminal portion 52 are integrally formed.
- Second connection part 51 The 2nd connection part 51 is formed in plate shape, and is arrange
- the first to third side surfaces 20D 1 to 20D 3 of the second connection portion 51 are covered with the molded body 30.
- the second connection portion 51 has a second connection surface 51 ⁇ / b> A exposed from the molded body 30.
- the second connection surface 51A is exposed from the molded body 30 inside the front opening 20F.
- the second wire 12 is connected to the second connection surface 51A.
- the second connection portion 51 is electrically connected to the light emitting element 10.
- the second connection surface 51A is sealed with a sealing resin 60 (see FIG. 1).
- Second terminal portion 52 The second terminal portion 52 is formed in a cubic shape, is connected to the lower end of the second side surface 20E 2 side of the second connecting portion 51. A portion of the second terminal portion 52, the bottom surface 20A, is exposed from the molded body 30 in the rear 20D and the second boundary side 20E 2, functions as an external electrode of the light emitting device 100.
- the second terminal portion 52 includes a first end surface 52A, a second end surface 52B, a third end surface 52C, and a second terminal recess 52S.
- the first end surface 52A is exposed from the molded body 30 on the back surface 20D of the package 20.
- the first end surface 52A forms part of the back surface 20D.
- the second end face 52B is exposed from the molded body 30 at the second side face 20E 2 of the package 20.
- the second end face 52B forms a second part of the side surface 20E 2.
- the third end surface 52C is exposed from the molded body 30 on the bottom surface 20A of the package 20.
- the third end surface 52C forms part of the bottom surface 20A.
- the second terminal recess 52S is a notch formed in the bottom surface 20A, the rear 20D and the second boundary side 20E 2.
- the second terminal recess 52S is open continuous with three sides each of the bottom 20A, the back 20D and the second side surface 20E 2.
- FIG. 8 is an enlarged perspective view of the second terminal recess 52S according to the first embodiment.
- the depth m 2 of the second terminal recess 52S in the first direction is the second direction of the second terminal recess 52S (ie, the back surface 20D).
- the solder accommodated in the second terminal recess 52S has a shape that is longer in the second direction than in the first direction.
- the first inner wall 521 and the second inner wall 522 are connected to the solder accommodated in the second terminal recess 52S.
- FIG. 9 is a perspective view of the mounting surface of the mounting substrate 200 according to the first embodiment.
- a region where the light emitting device 100 is mounted is illustrated as a mounting region 100R.
- the mounting substrate 200 includes a mounting surface 200 ⁇ / b> A, a first land 201, a second land 202, a third land 203, and an electric circuit 204.
- the light emitting device 100 is mounted on the mounting surface 200A.
- the first land 201 is a metal member for connecting the first terminal portion 42.
- the second land 202 is a metal member for connecting the second terminal portion 52.
- the third land 203 is a metal member for connecting the base portion 43.
- As the first to third lands 201 to 203 for example, copper foil or the like can be used.
- Each surface of the first to third lands 201 to 203 forms part of the mounting surface 200A.
- the electric circuit 204 is connected to each of the first land 201 and the second land 202.
- the first land 201 functions as an external terminal corresponding to the first terminal portion 42
- the second land 202 functions as an external terminal corresponding to the second terminal portion 52.
- the electric circuit 204 is not connected to the third land 203 and is electrically isolated from the third land 203. Therefore, the third land 203 does not function as an external terminal, and is a member only for providing a third solder fillet 303 described later.
- FIG. 10 is a perspective view of the mounting surface of the circuit board 300 according to the first embodiment.
- the circuit board 300 includes a light emitting device 100, a mounting board 200, a first solder fillet 301, a second solder fillet 302, and a pair of third solder fillets 303a and 303b.
- the first to third solder fillets 301 to 303b are formed by reflow soldering using a solder material containing flux.
- First solder fillet 301 is formed from the mounting surface 200A over and over on a first side face 20E 1 rear 20D. Further, the first solder fillet 301 is accommodated in the first terminal recess 42S. Thereby, the 1st terminal part 42 and the 1st land 201 are electrically and mechanically connected.
- the second solder fillet 302 is formed from the mounting surface 200A across on the back 20D on and the second side surface 20E 2.
- the second solder fillet 302 is filled in the second terminal recess 52S. Thereby, the 2nd terminal part 52 and the 2nd land 202 are connected electrically, mechanically, and thermally.
- the pair of third solder fillets 303a and 303b are disposed inside the recess 43S.
- the third solder fillet 303a is formed over the first inner wall 43Sa from the mounting surface 200A
- the third solder fillet 303b is formed over the second inner wall 43Sb from the mounting surface 200A.
- the third solder fillet 303a and the third solder fillet 303b face each other.
- the base portion 43 and the third land 203 are mechanically and thermally connected by the third solder fillet 303a and the third solder fillet 303b.
- the third inner wall 43Sc is exposed to the outside of the light emitting device 100.
- FIG. 11A is a cross-sectional view of the metal thin plate 451
- FIG. 11B is a plan view of the metal thin plate 451.
- FIG. 12A is a cross-sectional view of the lead frame 45
- FIG. 12B is a plan view of the lead frame 45.
- FIG. 13 is an enlarged view of the lead frame 45.
- 14 is a cross-sectional view taken along line AA in FIG.
- FIG. 15 is a plan view of the light emitting device package array PA according to the present embodiment.
- a metal thin plate 451 having a first main surface S1 and a second main surface S2 provided opposite to the first main surface S1 is prepared.
- the metal thin plate 451 has a thickness t 1 (for example, about 0.5 mm).
- a first mask M1 having a predetermined pattern is formed on the first main surface S1, and a second pattern having a pattern symmetrical to the first mask M1 is formed on the second main surface S2.
- Two masks M2 are formed, and the first main surface S1 and the second main surface S2 are etched simultaneously.
- an etching hole G is formed in the metal thin plate 451 as shown in FIG. Note that dry etching and wet etching can be used as the etching method. Further, as the etchant, an appropriate one corresponding to the material of the metal thin plate 451 may be selected.
- a third mask M3 having a predetermined pattern is formed on the first main surface S1, and the second main surface S2 is entirely covered on the second main surface S2.
- 4 mask M4 is formed and only 1st main surface S1 is etched.
- a lead frame 45 having an etching recess H formed in the first main surface S1 is completed.
- the depth of the etching recess H is, for example, about 0.3 mm. Therefore, the portion of the metal thin plate 451 where the etching recess H is formed has a thickness t 2 (for example, about 0.2 mm) smaller than the thickness t 1 .
- the lead frame 45 includes a first frame part F1, a second frame part F2, a third frame part F3, and a fourth frame part F4.
- the first frame part F1 and the second frame part F2 are adjacent to each other in a predetermined direction, and are connected by the first connection frame R1.
- the third frame portion F3 and the fourth frame portion F4 are adjacent to each other in a predetermined direction, and are connected by the second connection frame R2.
- the first frame part F1 and the third frame part F3 are adjacent to each other in the orthogonal direction (an example of the orthogonal direction) orthogonal to the predetermined direction, and are connected by the third connection frame R3 and the fourth connection frame R4.
- the second frame portion F2 and the fourth frame portion F4 are adjacent to each other in the orthogonal direction, and are connected by the fifth connection frame R5 and the sixth connection frame R6.
- the first to fourth frame portions F1 to F4 have the same configuration, and the first thick portion P1, the second thick portion P2, the first thin portion Q1, the second thin portion Q2, and the like. including.
- the first thick portion P1 has a first thickness t 1 (that is, the thickness of the metal thin plate 451).
- the base portion 43 is formed by cutting the first thick portion P1 with a dicing saw.
- the second thick part P2 is separated from the first thick part P1 in a predetermined direction.
- the second thick part P2 is cut by a dicing saw, whereby the first terminal part 42 and the second terminal part 52 are formed.
- the first thin portion Q1 has a second thickness t 2 (that is, the thickness of the portion of the metal thin plate 451 where the etching recess H is formed).
- the first thin part Q1 is connected to the first thick part P1 and the second thick part P2.
- the first thin portion Q1 corresponds to the outer peripheral portion of the first connection portion 41 of the light emitting device 100.
- the second thin portion Q2 has a second thickness t 2.
- the second thin portion Q2 is connected to the second thick portion P1, and is separated from the first thin portion Q1 via the etching hole G (see FIG. 11) in a predetermined direction.
- the second thin part Q ⁇ b> 2 corresponds to the second connection part 51 of the light emitting device 100.
- a single-sided etching recess X that is a part of the etching recess H is formed inside the first thick portion P1 of each frame portion F in the plan view of the lead frame 45.
- the portion on one side etch recess X is formed of the first thickness portion P1 has a second thickness t 2.
- the single-sided etching recess X is cut by a dicing saw, thereby forming a recess 43S (see FIG. 4).
- an example of the single-sided etching recess Y (“recess”) that is a part of the etching recess H is formed inside the second thick portion P2 of each frame portion F. ) Is formed.
- the portion on one side etch recess Y is formed of the second thick portion P2 has a second thickness t 2.
- the single-sided etching recess Y is cut by a dicing saw, thereby forming the first terminal recess 42S and the second terminal recess 52S (see FIG. 4).
- the first thin portion Q1 of the third frame portion F3 is connected to the first thick portion P1 of the first frame portion F1 via the third connection frame R3.
- the second thin part Q2 of the third frame part F3 is connected to the second thick part P2 of the first frame part F1 via the fourth connection frame R4.
- the first thin portion Q1 of the fourth frame portion F4 is connected to the first thick portion P1 of the second frame portion F2 via the fifth connection frame R5.
- the second thin part Q2 of the fourth frame part F4 is connected to the second thick part P2 of the second frame part F2 via the sixth connection frame R6.
- first to sixth connection frames R1 to R6 are cut by a dicing saw in a later process (see FIG. 15). That is, the first to sixth connection frames R1 to R6 constitute a cutting allowance for dicing. Further, as shown in FIG. 13, the portion connected to the third connecting frame R3 in the first thick portion P1 and the portion connected to the fourth connecting frame R4 in the second thick portion P2 are: They are arranged along a predetermined direction, and constitute a cutting margin together with the first to sixth connection frames R1 to R6.
- the lead frame 45 is placed in the mold. Specifically, the lead frame 45 is sandwiched between the upper mold and the lower mold. Next, a resin material constituting the molded body 30 is injected between the upper mold and the lower mold.
- the resin material is transfer molded by heating at a predetermined temperature.
- a light emitting device package array PA constituted by the lead frame 45 and the mold plate 46 in which the lead frame 45 is embedded is completed. It should be noted that in the light emitting device package array PA, the first thick portion P1 and the single-sided etched recess X and the second thick portion P2 and the single-sided etched recess Y are exposed from the mold plate 46. It is.
- the light emitting device package array PA is cut along a cutting line G1 and a cutting line G2 having a predetermined width by using a dicing saw. As a result, the plurality of light emitting devices 100 are manufactured together.
- the first lead 40 includes a first terminal portion 42 exposed from the molded body 30 in the bottom surface 20A, the rear 20D and the first boundary of the side 20E 1
- second lead 50 has a second terminal portion 52 exposed from the molded body 30 in the bottom surface 20A, the rear 20D and the second boundary side 20E 2.
- the first lead 40 includes a first terminal recess 42S
- the second lead 50 includes a second terminal recess 52S.
- the light emitting device 100 has no external electrode other than the first terminal portion 42 and the second terminal portion 52.
- the first terminal portion 42 and the second terminal portion 52 are not exposed on the front surface 20C, which is the light emission surface. Accordingly, a larger front opening 20F can be formed on the front surface 20C than when the first terminal portion 42 and the second terminal portion 52 are exposed on the front surface 20C. As a result, it is possible to suppress the light amount of the light emitting device 100 from decreasing.
- the contact area between the first terminal portion 42 and the first solder fillet 301 can be increased.
- the light emitting device 100 can be firmly fixed to the mounting substrate 200.
- the contact area between the second terminal portion 52 and the second solder fillet 302 can be increased. As a result, the light emitting device 100 can be firmly fixed to the mounting substrate 200.
- the depth m 1 of the first terminal recess 42S in the first direction is smaller than the depth n 1 of the first terminal recess 42S in the second direction. Therefore, when the solder is accommodated in the first terminal recess 42S (part of the first solder fillet 301) is solidified shrinkage, than the force which the solder pulls the light emitting device 100 to the first side face 20E 1 side, solder emission The force which pulls the apparatus 100 to the back surface 20D side can be made small. Therefore, it is possible to firmly fix the light emitting device 100 while suppressing the front surface 20 ⁇ / b> C, which is a light emitting surface, from looking up.
- the light emitting device 100 are the side-view type, the light emitting device 100 while easy inclination by the force pulling the rear 20D side, difficult slope by a force pulling the light emitting device 100 to the first side face 20E 1 side.
- the depth m 2 of the second terminal recess 52S in the first direction is smaller than the depth n 2 of the second terminal recess 52S in the second direction. Therefore, when the solder is accommodated in the second terminal recess 52S (part of the second solder fillet 302) is solidified shrinkage, than the force which the solder pulls the light emitting device 100 to the second side face 20E 2 side, solder emission The force which pulls the apparatus 100 to the back surface 20D side can be made small. Therefore, it is possible to firmly fix the light emitting device 100 while suppressing the front surface 20 ⁇ / b> C that is the light emitting surface from facing up.
- the first lead 40 includes a base portion 43 connected to the lower end portion of the first connection portion 41. Therefore, when the base portion 43 functions as a “weight”, it is possible to make the light emitting device 100 that is tall and easily fall down difficult to fall.
- the base portion 43 is exposed from the molded body 30 on the bottom surface 20 ⁇ / b> A of the package 20. Therefore, the heat generated from the light emitting element 10 can be released from the second exposed surface 43B to the mounting substrate 200 through the first connection portion 41 and the base portion 43 in sequence. Therefore, the heat dissipation efficiency of the light emitting device 100 can be improved.
- the base portion 43 is exposed from the molded body 30 on the back surface 20D of the package 20. Therefore, the heat generated from the light emitting element 10 can be released into the outside air from the first exposed surface 43A through the first connection portion 41 and the base portion 43 in order. Therefore, the heat dissipation efficiency of the light emitting device 100 can be further improved.
- the center of gravity S of the base portion 43 is located closer to the bottom surface 20A than the center T of the molded body 30 in the third direction. Therefore, since the center of gravity of the light emitting device 100 can be surely lowered, the light emitting device 100 can be made more difficult to fall.
- FIG. 16 is an enlarged perspective view of the first terminal recess 42S according to the second embodiment.
- the first terminal portion 42 includes an overhang portion 400 (an example of a “first overhang portion”).
- Projecting portion 400 is formed in a plate shape, it protrudes to the opening of the first side 20E 1 side of the first terminal recess 42S.
- the overhanging portion 400 has a second direction end surface 400A formed flush with the first end surface 42A of the first terminal portion 42 and a first direction formed flush with the second end surface 42B of the first terminal portion 42. And an end face 400B.
- the overhang portion 400 is formed integrally with the first terminal portion 42.
- the second terminal portion 52 like the first terminal portion 42, overhanging portion overhanging the second side face 20E 2 side of the opening of the second terminal recess 52S ( “second projecting part” Example).
- a lead frame 45 ⁇ / b> A having an overhanging portion 401 is prepared.
- Such an overhang portion 401 can be formed by finely setting a region where single-sided etching is performed. Specifically, it can be formed by setting the region where single-sided etching recess Y is subjected to single-sided etching to a C shape.
- the lead frame 45A is embedded in the mold plate 46 (see FIG. 15) by transfer molding.
- the lead frame 45A and the mold plate 46 are cut together along a cutting line having a predetermined width (see FIG. 15).
- the first terminal portion 42 includes an overhang portion 400 (an example of a “first overhang portion”). Overhang portion 400 overhangs the opening of the first side 20E 1 side of the first terminal recess 42S.
- the light emitting device 100 when reflow soldering is performed in order to mount the light emitting device 100, it is possible to suppress leakage of solder (a part of the first solder fillet 301) from the first terminal recess 42S. Moreover, since the overhang
- such an overhang portion 400 can be formed integrally with the first terminal portion 42 by using a lead frame 45A having an overhang source portion 401 that can be formed by single-side etching. it can.
- FIG. 18 is an enlarged perspective view of a first terminal recess 42S according to a modification of the second embodiment.
- the first terminal portion 42 includes an overhang portion 410 (an example of a “first overhang portion”).
- Projecting portion 410 is formed in a plate shape, it protrudes to the opening of the first side 20E 1 side of the first terminal recess 42S.
- first direction end surface 400B of the overhanging portion 400 is formed flush with the second end surface 42B of the first terminal portion 42.
- second direction end surface 400A of the overhang portion 400 is deeper than the first end surface 42A of the first terminal portion 42, and is not formed flush with the first end surface 42A.
- the second terminal portion 52 like the first terminal portion 42, overhanging portion overhanging the second side face 20E 2 side of the opening of the second terminal recess 52S ( “second projecting part” Example).
- a lead frame 45 ⁇ / b> B having an overhanging portion 411 is prepared.
- projection origin part 411 can be formed integrally with the 1st terminal part 42 by performing single-sided etching twice. Specifically, the plate-like metal member is first etched to the depth of the overhanging portion 411 by the first single-sided etching. Next, etching is performed to the depth of the single-sided etching recess Y by the second single-sided etching.
- the lead frame 45B is embedded in the mold plate 46 (see FIG. 15) by transfer molding.
- the lead frame 45B and the mold plate 46 are cut together using a dicing saw along a cutting line having a predetermined width (see FIG. 15).
- solder (a part of the first solder fillet 301) leaks out from the first terminal recess 42S by the overhang portion 410 according to the modification of the second embodiment. This can be suppressed, and the contact area between the first terminal portion 42 and the solder can be increased.
- FIG. 20 is a perspective view of the light emitting device 100A according to the third embodiment as viewed from the front.
- FIG. 21 is a perspective view of the light emitting device 100A according to the third embodiment as viewed from the rear.
- the light emitting device 100A includes a first lead 140, a second lead 150, a third lead 160, a blue light emitting element 10B, a green light emitting element 10G, and a red light emitting element 10R.
- the first lead 140 (an example of “first lead”) includes a first connection part 141 (an example of “first connection part”), a first terminal part 142 (an example of “first terminal part”), and a first Terminal recess 142S (an example of “first terminal recess”) is provided.
- the second lead 150 (an example of a “second lead”) includes a second connection part 151 (an example of a “second connection part”), a second terminal part 152 (an example of a “second terminal part”), and a second lead. Terminal recess 152S (an example of “second terminal recess”) is provided.
- the third lead 160 has a placement portion 161 and an exposed portion 162. Each of the first terminal portion 142, the second terminal portion 152, and the exposed portion 162 functions as an external terminal by being electrically connected to a mounting substrate (not shown).
- the blue light emitting element 10B, the green light emitting element 10G, and the red light emitting element 10R are placed on the placement surface 161A of the placement portion 161.
- Each of the blue light emitting element 10 ⁇ / b> B and the green light emitting element 10 ⁇ / b> G is electrically connected to the first connection surface 141 ⁇ / b> A of the first connection portion 141 and the second connection surface 151 ⁇ / b> A of the second connection portion 151.
- the red light emitting element 10R is electrically connected to the placement surface 161A and the second connection surface 151A.
- each of the first terminal portion 142 and the second terminal portion 152 is not exposed to the front surface 20C, which is a light emitting surface, and has a recess that can accommodate solder. Therefore, according to such a light emitting device 100A, it is possible to firmly fix the light emitting device 100A to the mounting substrate 200 while suppressing a decrease in the light amount of the light emitting device 100A and a decrease in strength of the molded body 30.
- FIG. 22 is a perspective view of the light emitting device 100 according to the fourth embodiment as viewed from the rear. As shown in FIG. 22, in the light emitting device 100, the first terminal portion 42 and the second terminal portion 52 are increased in height in the third direction. Accordingly, the first terminal recess 42S and the second terminal recess 52S are formed higher than the recess 43S in the third direction.
- FIG. 23 is an enlarged perspective view of the first terminal recess 42S according to the fourth embodiment.
- the height h 1 of the first terminal recess 42S in the third direction is the second direction of the first terminal recess 42S (ie, perpendicular to the back surface 20D).
- the depth n 1 Larger than the depth n 1 (> depth m 1 ) in the direction).
- the area of the 1st inner wall 421 is larger than the area of the 2nd inner wall 422, and both difference is large compared with 1st Embodiment.
- FIG. 24 is an enlarged perspective view of the second terminal recess 52S according to the fourth embodiment.
- the height h 2 of the second terminal recess 52S in the third direction is greater than the depth n 2 (> depth m 2 ) of the second terminal recess 52S in the second direction.
- the area of the 1st inner wall 521 is larger than the area of the 2nd inner wall 522, and both difference is large compared with 1st Embodiment.
- a lead frame 45C as shown in FIG. 25 is prepared.
- the single-sided etching recess Y is set widely, and this increases the processing limit on the dimension that allows single-sided etching.
- the lead frame 45C is embedded in the mold plate 46 (see FIG. 15) by transfer molding.
- the lead frame 45C and the mold plate 46 are cut together using a dicing saw along a cutting line having a predetermined width (see FIG. 15).
- the height h 1 of the first terminal recess 42S is greater than the depth n 1 of the first terminal recess 42S.
- the 1st terminal recessed part 42S is formed tall, the difference of the area of the 1st inner wall 421 and the area of the 2nd inner wall 422 becomes large. Accordingly, the difference between the force that the first solder fillet 301 pulls the light emitting device 100 toward the first side face 20E 1 and the force that the first solder fillet 301 pulls the light emitting device 100 toward the back surface 20D increases. The stability in the first direction of the light emitting device 100 produced by is improved.
- the height h 2 of the second terminal recess 52S is greater than the depth n 2 of the second terminal recess 52S, it is possible to obtain the same effect.
- FIG. 26 is a perspective view of the light emitting device 100 according to the fifth embodiment as viewed from the rear. As shown in FIG. 26, in the light emitting device 100, the first lead 40 has a first extension portion 101, and the second lead 50 has a second extension portion 102.
- the first extension portion 101 is disposed on the first connection portion 41 and connected to the first terminal portion 42.
- the first extension portion 101 extends from the surface on the back surface 20D side of the first connection portion 41 toward the back surface 20D, and is exposed from the molded body 30 on the back surface 20D.
- the first extending portion 101 has a first extending surface 101S that forms a part of the back surface 20D.
- the second extension portion 102 is disposed on the second connection portion 51 and connected to the second terminal portion 52.
- the second extending portion 102 extends from the surface on the back surface 20D side of the second connecting portion 51 toward the back surface 20D, and is exposed from the molded body 30 on the back surface 20D.
- the second extending portion 102 has a second extending surface 102S that forms a part of the back surface 20D.
- a lead frame 45D as shown in FIG. 27 is prepared.
- the lead frame 45D includes a first extension source portion 101A and a second extension source portion 102A.
- Such a lead frame 45D can be formed by setting a region where single-sided etching is performed to form the first connection source portion 41A and the second connection source portion 51A as shown in FIG.
- the single-sided etching recess X and the single-sided etching recess Y are set larger than the lead frame 45 according to the first embodiment. Thereby, the processing limit on the dimension which can be etched on one side is increased.
- FIG. 28 is an enlarged view of the lead frame 45D.
- the lead frame 45D has first to fourth frame portions F1 to F4.
- the first frame part F1 and the second frame part F2 are adjacent to each other in a predetermined direction, but are not connected.
- the third frame portion F3 and the fourth frame portion F4 are adjacent to each other in the predetermined direction, but are not connected.
- the third frame portion F3 and the fourth frame portion F4 are centered on an axis T parallel to the thickness direction (a direction orthogonal to the predetermined direction and the orthogonal direction, that is, a direction orthogonal to the paper surface).
- the first frame part F1 and the second frame part F2 are arranged rotationally symmetrically.
- the first thick part P1 of the third frame part F3 is directly connected to the first thick part P1 of the first frame part F1.
- the second thick part P2 of the third frame part F3 is directly connected to the second thick part P2 of the second frame part F2.
- the second thick part P2 of the fourth frame part F4 is directly connected to the second thick part P2 of the first frame part F1.
- a part of the etching recess H is formed inside the first thick part P1 of each frame part F in the plan view of the lead frame 45D.
- a part of the etching recess H is formed inside the second thick part P2 of each frame part F in the plan view of the lead frame 45D.
- the second thick part P2 of the first frame part F1 and the second thick part P2 of the fourth frame part F4 are connected to form the single-sided etching recess Y.
- the single-sided etching recess Y is formed by connecting the second thick part P2 of the second frame part F2 and the second thick part P2 of the third frame part F3.
- a portion where the first thick part P1 of the third frame part F3 and the first thick part P1 of the first frame part F1 are connected constitutes a cutting allowance for dicing (see FIG. 29). .
- the part where the second thick part P2 of the third frame part F3 and the second thick part P2 of the second frame part F2 are connected constitutes a cutting allowance for dicing.
- a portion where the second thick part P2 of the fourth frame part F4 and the second thick part P2 of the first frame part F1 are connected constitutes a cutting allowance for dicing.
- the lead frame 45D is embedded in the mold plate 46 by the transfer mold method, thereby completing the light emitting device package array PA.
- the first thick portion P1 and the single-sided etched recess X, and the second thick portion P2 and the single-sided etched recess Y are exposed from the mold plate 46. It should be noted that.
- the light emitting device package array PA is cut along cutting lines H1 and H2 having a predetermined width.
- the first terminal recess 42S and the second terminal recess 52S are formed by cutting the single-sided etching recess Y into a cross.
- the first lead 40 includes the first extending portion 101.
- the first extension portion 101 is disposed on the first connection portion 41 and is connected to the first terminal portion 42.
- the 1st extension part 101 is exposed from the molded object 30 in back 20D.
- first extension portion 101 is connected to the first terminal portion 42, “light emitting element 10 ⁇ first connection portion 41 ⁇ first extension portion 101 ⁇ first terminal portion 42 ⁇ mounting substrate”.
- a heat dissipation path of 200 "can be formed. Therefore, the heat generated from the light emitting element 10 can be released from the light emitting device 100 more efficiently.
- first extending portion 101 is exposed from the molded body 30 on the back surface 20D, it is referred to as “light emitting element 10 ⁇ first connecting portion 41 ⁇ first extending portion 101 ⁇ first extending surface 101S ⁇ outside air”.
- a heat dissipation path can be formed. Therefore, the heat generated from the light emitting element 10 can be released from the light emitting device 100 more efficiently.
- the fact that the first extending surface 101S is exposed on the outer surface of the molded body 30 means that the first extending portion 101 is brought into contact with the inner surface of the mold in the manufacturing process of the molded body 30. ing. Therefore, since the 1st connection part 41 is supported by the 1st extension part 101, it can suppress that the 1st connection part 41 vibrates minutely with the resin material inject
- the second lead 50 has the second extending portion 102.
- the second extension part 102 is disposed on the second connection part 51 and connected to the second terminal part 52.
- the 2nd extension part 102 is exposed from the molded object 30 in back 20D.
- the overhang portions 400 and 410 are formed using the lead frame 45A shown in FIG. 14 or the lead frame 45B shown in FIG. 15, but the lead frame shown in FIG. Even if 45 is used, the overhanging portion 400 can be formed.
- the blade of the dicing saw is rotated from the front side to the back side of the paper surface, The dicing saw may be moved from right to left in the figure. As a result, a burr projecting into the first terminal recess 42S, which can be used as the projecting portion 400, can be formed.
- the first lead 40 may have an overhanging portion (not shown) that projects from the opening on the back side of the first terminal recess 42S.
- the second lead 50 may include an overhanging portion (not shown) that is continuous with the back surface 20D and projects to the opening on the back surface side of the second terminal recess 52S.
- the base portion 43 has the concave portion 43S.
- the base portion 43 may not have the concave portion 43S. Even in this case, heat can be effectively radiated from the first exposed surface 43A and the second exposed surface 43B. In this case, if the third fillet 303 is not provided, the third land 203 may not be formed on the mounting substrate 200.
- the base portion 43 is formed in an L shape and extends from the bottom surface 20A side of the first connection portion 41 to the back surface 20D side, but is not limited thereto.
- the base portion 43 may be disposed on the bottom surface 20 ⁇ / b> A side of the first connection portion 41 and may not extend to the back surface 20 ⁇ / b> D side of the first connection portion 41. That is, the base portion 43 may be a plate-like member disposed horizontally on the bottom surface 20 ⁇ / b> A side of the first connection portion 41.
- the base portion 43 is exposed from the molded body 30 on the bottom surface 20A and the back surface 20D of the package 20, but is not limited thereto.
- the base portion 43 may be exposed only on one of the bottom surface 20A and the back surface 20D, or may not be exposed from either the bottom surface 20A or the back surface 20D.
- the base portion 43 is formed in an L shape, but is not limited thereto.
- the base portion 43 may have a plate shape, a rod shape, a columnar shape, or other complicated three-dimensional shapes.
- each of the first terminal portion 42 and the second terminal portion 43 is formed in a cubic shape, but is not limited thereto.
- Each shape of the 1st terminal part 42 and the 2nd terminal part 43 can be changed suitably.
- the depth m 1 in the first direction of the first terminal recess 42S is smaller than the depth n 1 of the first terminal recess 42S in the second direction. It is not a thing.
- the depth m 1 may be approximately the same as the depth n 1 .
- the depth m 2 of the second terminal recess 52S in the first direction may be substantially the same as the depth n 2 of the second terminal recess 52S in the second direction.
- the first solder fillet 301 is in contact with the first end surface 42A and the second end surface 42B of the first terminal portion 42 as shown in FIG. is not.
- the first solder fillet 301 only needs to be accommodated in the first terminal recess 42S, and may be in contact with only one of the first end surface 42A and the second end surface 42B, or not in contact with either. May be.
- the second solder fillet 302 is in contact with the first end surface 52A and the second end surface 52B of the second terminal portion 52, but is not limited thereto.
- the second solder fillet 302 only needs to be accommodated in the second terminal recess 52S, and may be in contact with only one of the first end surface 52A and the second end surface 52B, or not in contact with either. May be.
- the lead frame 45 is formed by etching a metal thin plate, but the present invention is not limited to this.
- the lead frame 45 can also be formed by punching a plurality of thin metal thin plates into a predetermined shape and then pressing the plurality of thin metal thin plates together.
- the technique disclosed herein can be used in the field of light emitting devices because it can suppress a decrease in light amount and a decrease in intensity.
- third land 204 ... electric circuit 300 ... Circuit board 301 ... First solder fillet 302 ... Second solder fillet 303a, 303b ... Third solder fillet 400, 410 ... Overhang portion 401, 411 ... Overhang origin portion ... main surface M ... mask F ... frame portion G ... etching holes H ... etch recess P ... thick portion Q ... thin portion R ... connecting frames PA ... light emitting device package array X, Y ... sided etch recess
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Abstract
Description
具体的に、特許文献1の発光装置は、直方体形状に形成されており、実装面に当接される底面と、底面に対向する光出射面である上面と、底面及び上面に連なる4つの側面と、を有する。底面及び4つの側面によって形成される4つの角には4つの端子が露出されており、これら4つの端子は、半田を介して実装基板に固定されている。これによって、トップビュー型の発光装置は、実装基板に強固に固定することができる。
しかしながら、特許文献1の手法をサイドビュー型の発光装置に適用すると、発光装置の光量が減少するおそれがある。具体的に、サイドビュー型の発光装置では、4つの側面のうち1つの側面(以下、「前面」という。)が光出射面であり、前面に形成される前面開口から光が出射される。そのため、前面側の2つの角に2つの端子を設けると前面開口の面積が小さくなるので、発光装置の光量が減少してしまう。
ここに開示される発光装置は、略直方体形状のパッケージと、パッケージに載置される発光素子と、を備える。パッケージは、成形体と、成形体にそれぞれ埋設される第1リード及び第2リードと、によって構成される。第1リードは、パッケージの第1側面と、底面と、底面に連なる光出射面に対向する背面と、の境界において成形体から露出する第1端子部を有する。第2リードは、第1側面に対向する第2側面と、底面と、背面と、の境界において成形体から露出する第2端子部を有する。第1端子部は、第1側面と底面と背面に連なって開口する第1凹部を有する。第2端子部は、第2側面と底面と背面に連なって開口する第2凹部を有する。
ここに開示される技術によれば、光量の減少及び強度の低下を抑制可能なサイドビュー型の発光装置、及び発光装置用パッケージアレイを提供することができる。
(第1実施形態の概要)
第1実施形態では、光量の減少及び強度の低下を抑制可能なサイドビュー型の発光装置について説明する。具体的に、発光装置は、背面、底面及び2つの側面によって形成される2つの角に露出する2つの端子を有しており、前面又は上面に露出する端子を有していない。2つの端子それぞれには、半田を収容可能な凹部が形成されている。
以下、発光装置、実装基板及び回路基板の構成と、発光装置の製造方法とについて順次説明する。
第1実施形態に係る発光装置の構成について、図面を参照しながら説明する。図1は、第1実施形態に係る発光装置100を前方から見た斜視図である。図2は、第1実施形態に係る発光装置100を後方から見た斜視図である。
発光素子10は、パッケージ20に載置される。発光素子10は、第1ワイヤ11及び第2ワイヤ12を介して、パッケージ20と電気的に接続される。
本実施形態において、パッケージ20の外形は、第1方向に沿って延びる略直方体形状である。パッケージ20は、底面20Aと、上面20Bと、前面20Cと、背面20Dと、第1側面20E1と、第2側面20E2とを有する。
パッケージ20は、成形体30と、第1リード40と、第2リード50と、封止樹脂60と、によって構成される。
成形体30は、パッケージ20の外形を成す。成形体30は、耐熱性及び適度な強度を有し、発光素子10の出射光や外光などが透過しにくい絶縁性の材料によって構成される。このような材料としては、熱硬化性樹脂であるトリアジン誘導体エポキシ樹脂が好適である。このような熱硬化性樹脂には、酸無水物、酸化防止剤、離型材、光反射部材、無機充填材、硬化触媒、光安定剤、滑剤が含有されていてもよい。光反射部材としては、0~90wt%、好ましくは10~60wt%充填される二酸化チタンを用いることができる。ただし、成形体30の材料は、これに限られるものではなく、例えば、熱硬化性樹脂のうち、エポキシ樹脂、変性エポキシ樹脂、シリコーン樹脂、変性シリコーン樹脂、アクリレート樹脂、ウレタン樹脂から選択される少なくとも1種の樹脂を用いることができる。特に、エポキシ樹脂、変性エポキシ樹脂、シリコーン樹脂、変性シリコーン樹脂は、成形体30の材料として好適である。また、液晶ポリマー、ポリフタルアミド樹脂、ポリブチレンテレフタレート(PBT)などの熱可塑性樹脂を用いてもよい。
第1リード40及び第2リード50は、比較的大きな熱伝導率(例えば、200W/(m・K)程度以上)を有する材料によって構成されることが好ましい。これにより、発光素子10から発生する熱を効率的に伝達できる。このような材料としては、例えば、Ni、Au、Cu、Ag、Mo、W、アルミニウム、金、鉄等の金属又は鉄-ニッケル合金、りん青銅、鉄入り銅等の合金等の単層又は複数層を用いることができる。また、第1リード40及び第2リード50それぞれの表面には、メッキが施されていてもよい。
封止樹脂60は、前面開口20Fの内部に充填されており、発光素子10を封止する。このような封止樹脂60としては、透光性を有する樹脂、例えば、ポリオレフィン系樹脂、ポリカーボネート樹脂、ポリスチレン樹脂、エポキシ樹脂、アクリル樹脂、アクリレート樹脂、メタクリル樹脂(PMMA等)、ウレタン樹脂、ポリイミド樹脂、ポリノルボルネン樹脂、フッ素樹脂、シリコーン樹脂、変性シリコーン樹脂、変性エポキシ樹脂等から選択される少なくとも1種の樹脂を用いることができる。また、このような材料には、例えば、WO2006/038502号、特開2006-229055号に記載の蛍光体又は顔料、フィラー又は拡散材等が含有されていてもよい。
次に、第1実施形態に係るリードの構成について、図面を参照しながら説明する。図3は、図1の透視図である。図4は、図2の透視図である。図5は、第1実施形態に係る発光装置100の底面20Aの平面図である。なお、図3及び図4では、成形体30の輪郭が示されている。
第1リード40は、第1接続部41と、第1端子部42と、土台部43とによって構成される。本実施形態において、第1端子部42及び土台部43は、第1接続部41に一体的に連結されている。
第1接続部41は、板状に形成されており、背面20Dに沿って配置される。第1接続部41は、成形体30から露出する第1接続面41Aを有する。第1接続面41Aは、前面開口20Fの内部で成形体30から露出する。第1接続面41Aには、発光素子10が載置される(すなわち、第1接続面41Aは、発光素子10が載置される載置面となる)とともに、第1ワイヤ11が接続されている。これによって、第1接続部41は発光素子10と電気的に接続されている(すなわち、第1接続部41は、発光素子10が載置される載置部となる)。第1接続面41Aは、封止樹脂60によって封止されている(図1参照)。
第1端子部42は、立方体状に形成されており、第1接続部41の第1側面20E1側の下端部に連結される。第1端子部42は、底面20A、背面20D及び第1側面20E1の境界において成形体30から露出しており、発光装置100の外部電極として機能する。第1端子部42は、第1端面42Aと、第2端面42Bと、第3端面42Cと、第1端子凹部42Sとを有する。
土台部43は、第1接続部41の底面20A側、すなわち、第1接続部41の下端部に連結されている。土台部43は、発光装置100の土台であり、背高で倒れやすい形状の発光装置100を倒れにくくする“重り”として機能する。
第2リード50は、第2接続部51と、第2端子部52とによって構成される。本実施形態において、第2接続部51と第2端子部52とは、一体的に形成されている。
第2接続部51は、板状に形成されており、背面20Dに沿って配置される。第2接続部51の第1~第3側面20D1~20D3側は、成形体30に覆われている。一方で、第2接続部51は、成形体30から露出する第2接続面51Aを有する。
第2端子部52は、立方体状に形成されており、第2接続部51の第2側面20E2側の下端部に連結される。第2端子部52の一部は、底面20A、背面20D及び第2側面20E2の境界において成形体30から露出しており、発光装置100の外部電極として機能する。第2端子部52は、第1端面52Aと、第2端面52Bと、第3端面52Cと、第2端子凹部52Sとを有する。
次に、第1実施形態に係る実装基板の構成について、図面を参照しながら説明する。図9は、第1実施形態に係る実装基板200の実装面の斜視図である。なお、図9では、発光装置100が実装される領域を実装領域100Rとして示している。
次に、第1実施形態に係る回路基板の構成について、図面を参照しながら説明する。図10は、第1実施形態に係る回路基板300の実装面の斜視図である。
図10に示すように、回路基板300は、発光装置100と、実装基板200と、第1半田フィレット301と、第2半田フィレット302と、一対の第3半田フィレット303a、303bとを備える。第1乃至第3半田フィレット301~303bは、フラックスを含む半田材料を用いたリフロー半田付けによって形成される。
次に、第1実施形態に係る複数の発光装置100を一括して製造する方法について、図面を参照しながら説明する。図11(a)は、金属薄板451の断面図であり、図11(b)は、金属薄板451の平面図である。図12(a)は、リードフレーム45の断面図であり、図12(b)は、リードフレーム45の平面図である。図13は、リードフレーム45の拡大図である。図14は、図13のA-A線における断面図である。図15は、本実施形態に係る発光装置用パッケージアレイPAの平面図である。
次に、上金型と下金型との間に成形体30を構成する樹脂材料を注入する。
(1)第1実施形態に係る発光装置100において、第1リード40は、底面20A、背面20D及び第1側面20E1の境界において成形体30から露出する第1端子部42を含み、第2リード50は、底面20A、背面20D及び第2側面20E2の境界において成形体30から露出する第2端子部52を有する。第1リード40は第1端子凹部42Sを含み、第2リード50は第2端子凹部52Sを含む。なお、発光装置100は、第1端子部42及び第2端子部52以外に外部電極を有していない。
従って、第1端子凹部42Sに収容される半田(第1半田フィレット301の一部)が固化収縮する際に、半田が発光装置100を第1側面20E1側に引っ張る力よりも、半田が発光装置100を背面20D側に引っ張る力を小さくすることができる。そのため、光出射面である前面20Cが上方を仰ぎ向くことを抑制しつつ、発光装置100を強固に固定することができる。
従って、第2端子凹部52Sに収容される半田(第2半田フィレット302の一部)が固化収縮する際に、半田が発光装置100を第2側面20E2側に引っ張る力よりも、半田が発光装置100を背面20D側に引っ張る力を小さくすることができる。そのため、光出射面である前面20Cが仰ぎ向くことを抑制しつつ、発光装置100を強固に固定することができる。
従って、土台部43が“重り”として機能することによって、背高で倒れやすい形状の発光装置100を倒れにくくすることができる。
従って、発光素子10から発生する熱を、第1接続部41及び土台部43を順次介して第2露出面43Bから実装基板200に放出させることができる。従って、発光装置100の放熱効率を向上させることができる。
従って、発光素子10から発生する熱を、第1接続部41及び土台部43を順次介して第1露出面43Aから外気中に放出させることができる。従って、発光装置100の放熱効率をより向上させることができる。
従って、発光装置100を確実に低重心化させることができるので、発光装置100をより倒れにくくすることができる。
次に、第2実施形態について図面を参照しながら説明する。第1実施形態と第2実施形態との相違点は、端子凹部の一部に蓋がされている点である。以下においては、この相違点について主に説明する。
図16は、第2実施形態に係る第1端子凹部42Sの拡大斜視図である。図16に示すように、第1端子部42は、張出部400(「第1張出部」の一例)を有する。張出部400は、板状に形成されており、第1端子凹部42Sの第1側面20E1側の開口に張り出している。張出部400は、第1端子部42の第1端面42Aと面一に形成される第2方向端面400Aと、第1端子部42の第2端面42Bと面一に形成される第1方向端面400Bと、を有する。本実施形態において、張出部400は、第1端子部42と一体的に形成されている。
まず、図17に示すように、張出元部401を有するリードフレーム45Aを準備する。このような張出元部401は、片面エッチングを施す領域を細かく設定することによって形成することができる。具体的には、片面エッチング凹部Yに片面エッチングを施す領域をC形に設定することによって形成できる。
次に、ダイシングソーを用いて、所定幅の切断線(図15参照)に沿ってリードフレーム45A及びモールド板46を一緒に切断する。
第2実施形態に係る発光装置100において、第1端子部42は、張出部400(「第1張出部」の一例)を有する。張出部400は、第1端子凹部42Sの第1側面20E1側の開口に張り出している。
次に、第2実施形態の変形例について図面を参照しながら説明する。
(発光装置の構成)
図18は、第2実施形態の変形例に係る第1端子凹部42Sの拡大斜視図である。図18に示すように、第1端子部42は、張出部410(「第1張出部」の一例)を有する。張出部410は、板状に形成されており、第1端子凹部42Sの第1側面20E1側の開口に張り出している。
まず、図19に示すように、張出元部411を有するリードフレーム45Bを準備する。このような張出元部411は、片面エッチングを2回行うことによって、第1端子部42と一体的に形成することができる。具体的には、まず、1回目の片面エッチングによって、張出元部411の深さまで板状金属部材をエッチングしておく。次に、2回目の片面エッチングによって、片面エッチング凹部Yの深さまでエッチングする。
次に、ダイシングソーを用いて、所定幅の切断線(図15参照)に沿ってリードフレーム45B及びモールド板46を一緒に切断する。
第2実施形態の変形例に係る張出部410によっても、第2実施形態に係る張出部400と同様、第1端子凹部42S内から半田(第1半田フィレット301の一部)が漏れ出すことを抑制できるとともに、第1端子部42と半田との接触面積をより大きくすることができる。
次に、第3実施形態について図面を参照しながら説明する。第1実施形態と第3実施形態との相違点は、発光装置100が3つの端子部を備える点である。以下においては、この相違点について主に説明する。
図20は、第3実施形態に係る発光装置100Aを前方から見た透視斜視図である。図21は、第3実施形態に係る発光装置100Aを後方から見た透視斜視図である。
第3実施形態に係る発光装置100Aにおいて、第1端子部142及び第2端子部152それぞれは、光出射面である前面20Cに露出しておらず、かつ、半田を収容可能な凹部を有する。従って、このような発光装置100Aによれば、発光装置100Aの光量減少と成形体30の強度低下とを抑制しつつ、発光装置100Aを実装基板200に強固に固定することができる。
次に、第4実施形態について図面を参照しながら説明する。第1実施形態と第4実施形態との相違点は、端子部を背高にした点である。以下においては、この相違点について主に説明する。
図22は、第4実施形態に係る発光装置100を後方から見た透視斜視図である。図22に示すように、発光装置100において、第1端子部42及び第2端子部52は、第3方向における高さが大きくされている。これに伴い、第1端子凹部42S及び第2端子凹部52Sは、第3方向において凹部43Sよりも高く形成されている。
まず、図25に示すようなリードフレーム45Cを準備する。リードフレーム45Cにおいて、片面エッチング凹部Yは広く設定されており、これによって、片面エッチング可能な寸法上の加工限界が高められている。
次に、ダイシングソーを用いて、所定幅の切断線(図15参照)に沿ってリードフレーム45C及びモールド板46を一緒に切断する。
第4実施形態に係る発光装置100において、第1端子凹部42Sの高さh1は、第1端子凹部42Sの深さn1よりも大きい。
次に、第5実施形態について図面を参照しながら説明する。第1実施形態と第5実施形態との相違点は、第1リード40及び第2リード50それぞれの一部が背面20Dに向かって延出している点である。以下においては、この相違点について主に説明する。
図26は、第5実施形態に係る発光装置100を後方から見た透視斜視図である。図26に示すように、発光装置100において、第1リード40は、第1延出部101を有し、第2リード50は、第2延出部102を有する。
まず、図27に示すようなリードフレーム45Dを準備する。リードフレーム45Dは、第1延出元部101Aと第2延出元部102Aとを備える。このようなリードフレーム45Dは、第1接続元部41A及び第2接続元部51Aを形成するために片面エッチングを施す領域を図27に示すように設定することによって形成できる。
第5実施形態に係る発光装置100において、第1リード40は、第1延出部101を有する。第1延出部101は、第1接続部41上に配置されており、第1端子部42に接続されている。第1延出部101は、背面20Dにおいて成形体30から露出している。
本発明は上記の実施形態によって記載したが、この開示の一部をなす論述及び図面はこの発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施形態、実施例及び運用技術が明らかとなろう。
同様に、第2端子凹部52Sの第1方向における深さm2は、第2端子凹部52Sの第2方向における深さn2と同程度であってもよい。
10…発光素子
11…第1ワイヤ
12…第2ワイヤ
20…パッケージ
20A…底面
20B…上面
20C…前面
20D…背面
20E1…第1側面
20E2…第2側面
20F…前面開口
30…成形体
40…第1リード
41…第1接続部
42…第1端子部
43…土台部
43S…凹部
43A…第1露出面
43B…第2露出面
45…リードフレーム
451…金属薄板
46…モールド板
50…第2リード
51…第2接続部
52…第2端子部
60…封止樹脂
200…実装基板
200A…実装面
201…第1ランド
202…第2ランド
203…第3ランド
204…電気回路
300…回路基板
301…第1半田フィレット
302…第2半田フィレット
303a、303b…第3半田フィレット
400,410…張出部
401,411…張出元部
S…主面
M…マスク
F…フレーム部
G…エッチング孔部
H…エッチング凹部
P…肉厚部
Q…肉薄部
R…連結フレーム
PA…発光装置用パッケージアレイ
X,Y…片面エッチング凹部
Claims (14)
- 成形体と、前記成形体にそれぞれ埋設される第1リード及び第2リードと、によって構成される略直方体形状のパッケージと、
前記パッケージに載置される発光素子と、
を備え、
前記第1リードは、前記パッケージの第1側面と、底面と、前記底面に連なる光出射面に対向する背面と、の境界において前記成形体から露出する第1端子部を有し、
前記第2リードは、前記第1側面に対向する第2側面と、前記底面と、前記背面と、の境界において前記成形体から露出する第2端子部を有し、
前記第1端子部は、前記第1側面と前記底面と前記背面に連なって開口する第1凹部を有し、
前記第2端子部は、前記第2側面と前記底面と前記背面に連なって開口する第2凹部を有する、
発光装置。 - 前記第1端子凹部において、前記第1側面に垂直な方向における深さは、前記背面に垂直な方向における深さよりも小さい、
請求項1に記載の発光装置。 - 前記第1端子凹部において、前記底面に垂直な方向における高さは、前記背面に垂直な方向における前記深さよりも大きい、
請求項2に記載の発光装置。 - 前記第2端子凹部において、前記第2側面に垂直な方向における深さは、前記背面に垂直な方向における深さよりも小さい、
請求項1乃至3のいずれかに記載の発光装置。 - 前記第2端子凹部において、前記底面に垂直な方向における高さは、前記背面に垂直な方向における前記深さよりも大きい、
請求項4に記載の発光装置。 - 前記第1端子部は、前記第1端子凹部の前記第1側面側の開口に張り出す第1張出部を含む、
請求項1乃至5のいずれかに記載の発光装置。 - 前記第2端子部は、前記第2端子凹部の前記第2側面側の開口に張り出す第2張出部を含む、
請求項1乃至6のいずれかに記載の発光装置。 - 前記第1リードは、
前記発光素子と電気的に接続される接続部と、
前記接続部の下端に連結される土台部と、
を有する、
請求項1乃至7のいずれかに記載の発光装置。 - 前記土台部は、前記底面において前記成形体から露出する、
請求項8に記載の発光装置。 - 前記土台部は、前記背面において前記成形体から露出する、
請求項8又は9に記載の発光装置。 - 前記土台部の重心は、前記底面に垂直な方向における前記成形体の中心よりも前記底面側に位置する、
請求項8乃至10のいずれかに記載の発光装置。 - 樹脂によって構成されるモールド板と、
第1フレーム部と、所定方向において前記第1フレーム部に隣接する第2フレーム部と、を有し、前記モールド板に埋設される薄板状のリードフレームと、
を備え、
前記第1フレーム部及び前記第2フレーム部のそれぞれは、
第1厚みを有し、前記モールド板から露出する第1肉厚部と、
前記第1厚みを有し、前記モールド板から露出しており、前記所定方向において前記第1肉厚部から離間する第2肉厚部と、
前記第1厚みよりも小さい第2厚みを有し、前記第1肉厚部と前記第2肉厚部とに連結される第1肉薄部と、
前記第2厚みを有し、前記第2肉厚部に連結されており、前記所定方向において前記第1肉薄部から離間する第2肉薄部と、
を含んでおり、
前記第2肉厚部は、前記第2厚みを有し、前記モールド板から露出する凹部を含む、
発光装置用パッケージアレイ。 - 前記リードフレームは、前記第1フレーム部及び第2フレーム部と同様の構成を有する第3フレーム部及び第4フレーム部を有し、
前記第3フレーム部及び第4フレーム部は、厚み方向に平行な軸心を中心として、前記第1フレーム部及び前記第2フレーム部に対して回転対称に配置されており、
前記第3フレーム部の前記第1肉厚部は、前記第1フレーム部の前記第1肉厚部に連結され、
前記第3フレーム部の前記第2肉厚部は、前記第2フレーム部の前記第2肉厚部に連結され、
前記第4フレーム部の前記第2肉厚部は、前記第1フレーム部の前記第2肉厚部に連結されている、
請求項12に記載の発光装置用パッケージアレイ。 - 前記リードフレームは、前記第1フレーム部及び第2フレーム部と同様の構成を有する第3フレーム部及び第4フレーム部を有し、
前記第3フレーム部は、前記所定方向に直交する直交方向において前記第1フレーム部に隣接し、
前記第4フレーム部は、前記直交方向において前記第2フレーム部に隣接しており、
前記第3フレーム部の前記第1肉薄部は、前記第1フレーム部の前記第1肉厚部に連結され、
前記第3フレーム部の前記第2肉薄部は、前記第1フレーム部の前記第2肉厚部に連結され、
前記第4フレーム部の前記第1肉薄部は、前記第2フレーム部の前記第1肉厚部に連結され、
前記第4フレーム部の前記第2肉薄部は、前記第2フレーム部の前記第2肉厚部に連結されている、
請求項12に記載の発光装置用パッケージアレイ。
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EP2613372B1 (en) | 2019-10-23 |
JP5803926B2 (ja) | 2015-11-04 |
MX2013002528A (es) | 2013-10-28 |
BR112013005190B1 (pt) | 2022-08-23 |
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