WO2005114728A1 - 半導体装置並びに配線基板及びその製造方法 - Google Patents
半導体装置並びに配線基板及びその製造方法 Download PDFInfo
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- WO2005114728A1 WO2005114728A1 PCT/JP2005/009061 JP2005009061W WO2005114728A1 WO 2005114728 A1 WO2005114728 A1 WO 2005114728A1 JP 2005009061 W JP2005009061 W JP 2005009061W WO 2005114728 A1 WO2005114728 A1 WO 2005114728A1
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- Prior art keywords
- wiring
- wiring portion
- semiconductor chip
- forming
- thermal expansion
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- 238000004519 manufacturing process Methods 0.000 title claims description 27
- 239000000463 material Substances 0.000 claims description 52
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
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Classifications
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- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49833—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers the chip support structure consisting of a plurality of insulating substrates
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
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- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
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- H01L23/538—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames the interconnection structure between a plurality of semiconductor chips being formed on, or in, insulating substrates
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- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
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- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
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- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
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- H01L2924/1025—Semiconducting materials
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
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- H01L2924/15311—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a ball array, e.g. BGA
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- H01L2924/19105—Disposition of discrete passive components in a side-by-side arrangement on a common die mounting substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
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- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
Definitions
- the present invention relates to a semiconductor device, a wiring board, and a method of manufacturing the same, and more particularly, to a semiconductor device having a structure in which a semiconductor chip is mounted on a wiring board (hereinafter, simply referred to as “semiconductor device”), and the above-described semiconductor device.
- semiconductor device simply referred to as “semiconductor device”
- the present invention relates to a wiring board used for a semiconductor device and a method for manufacturing the same.
- the mounting density of semiconductor chips and semiconductor devices has been increased in recent years.
- the mounting density of semiconductor chips is often increased by mounting the semiconductor chips on a wiring board by wireless bonding, especially by flip chip bonding.
- the mounting density of a semiconductor device means that the semiconductor device is a wiring board (a wiring board different from the wiring board that constitutes the semiconductor device! Hereinafter, this wiring board is referred to as “mother board”). ”) Is increased by surface mounting.
- various node / cage methods suitable for surface mounting have been developed, for example, ball grid 'array type semiconductor packages.
- Flip chip bonding and surface mounting are advantageous in promoting the miniaturization of semiconductor chips and semiconductor devices, miniaturization, multi-pinning, and the like, and can reduce wiring resistance as compared with wire bonding. This is also advantageous in ensuring high-speed operability of an integrated circuit or the like formed in a semiconductor chip or a semiconductor device.
- system LSI system large-scale integrated circuit
- passive circuits are required rather than improving the function and increasing the speed with a single LSI.
- Mounting such components on a single semiconductor chip enables higher functionality and higher speed at lower cost, and such system LSIs (system-on-chip) have also been widely adopted. ing.
- Japanese Patent Application Laid-Open No. 64-32662 discloses that a small substrate having a specific coefficient of thermal expansion between a semiconductor chip and a wiring substrate (large substrate), that is, a thermal expansion between the semiconductor chip and the wiring substrate (large substrate).
- a semiconductor package structure semiconductor device is described in which reliability is improved by interposing a small substrate having a coefficient difference smaller than a thermal expansion coefficient difference from a wiring substrate (large substrate).
- the semiconductor chip is mounted on a small substrate, and a plurality of small substrates on which a semiconductor chip is mounted are mounted on a wiring substrate (large substrate).
- Japanese Patent Application Laid-Open No. 8-167630 discloses that a direct through-hole connection is made between an integrated circuit chip and a wiring board. It describes a chip connection structure in which an adhesive film is interposed therebetween and the thermal expansion coefficient of the wiring substrate is substantially equal to the thermal expansion coefficient of the integrated circuit. Disclosure of the invention
- the present invention has been made in view of the above circumstances, and an object of the present invention is to achieve high performance and low cost while maintaining high reliability of a semiconductor device. .
- a semiconductor device of the present invention has a plurality of connection terminals arranged on one surface in a thickness direction and a plurality of external connections on the other surface in the thickness direction.
- the first and second wiring portions have the same size of surfaces facing each other, and the coefficient of thermal expansion of the second wiring portion is equal to the thermal expansion coefficient of the first wiring portion. Smaller than the coefficient of expansion and equal to the coefficient of thermal expansion of the semiconductor chip. And wherein and Turkey.
- the wiring board of the present invention has a first wiring portion having a plurality of wiring layers and a plurality of external connection bumps, and a plurality of connection terminals arranged so as to be connectable to at least one semiconductor chip.
- a second wiring portion wherein the second wiring portion is electrically connected to the first wiring portion and is integrated with the first wiring portion in a thickness direction.
- the contact plug force provided in the through-hole penetrating the wiring portion in the thickness direction, the first and second wiring portions have the same size of the surface facing each other, and the heat of the second wiring portion
- the coefficient of expansion is smaller than the coefficient of thermal expansion of the first wiring portion and is equal to the coefficient of thermal expansion of the semiconductor chip.
- the contact plug force provided in the through hole, the first and second wiring portions have the same size of the surface facing each other, and the coefficient of thermal expansion of the second wiring portion is the first wiring portion.
- the thermal expansion coefficient is smaller than the thermal expansion coefficient of the portion and is equal to the thermal expansion coefficient of the semiconductor chip.
- the wiring board includes, in addition to the first wiring portion including a plurality of wiring layers and the like, a second wiring portion integrated with the first wiring portion in the thickness direction.
- the coefficient of thermal expansion of the second wiring portion is smaller than the coefficient of thermal expansion of the first wiring portion and is equal to the coefficient of thermal expansion of the semiconductor chip. Therefore, the internal stress due to the difference in the thermal expansion coefficient between the semiconductor chip mounted on the second wiring portion and the wiring board is suppressed. Therefore, the reliability of the semiconductor device in which the semiconductor chip is mounted on the wiring board can be improved.
- the first wiring portion and the second wiring portion are interposed between the semiconductor chip and the mother board, and thus the semiconductor chip is mounted.
- the internal stress caused by the difference in the coefficient of thermal expansion between the chip and the motherboard is also reduced. Therefore, the reliability of the electronic device in which the semiconductor device is mounted on the motherboard can be improved.
- the sizes of the surfaces of the first wiring portion and the second wiring portion facing each other are equal. Therefore, only one second wiring portion needs to be formed when a plurality of semiconductor chips are mounted on the wiring substrate to improve the performance of the semiconductor device. Therefore, high performance of the semiconductor device can be realized at low cost.
- the provision of the first wiring portion enables expansion of the terminal pitch and optimal wiring connection of a plurality of mounted semiconductor chips, thereby realizing higher performance and lower cost.
- the present invention it is possible to provide a semiconductor device capable of realizing high reliability and high performance at low cost with high reliability. By using this semiconductor device, it is easy to provide a highly reliable and high-performance electronic device.
- FIG. 1 is a partially cutaway side view schematically showing a first embodiment of each of a semiconductor device and a wiring board of the present invention.
- FIG. 2 is a partially cutaway side view schematically showing a semiconductor device and a wiring board according to a second embodiment of the present invention.
- FIG. 3 is a partially cutaway side view schematically showing a third embodiment of the semiconductor device of the present invention.
- FIG. 4 is a partially cutaway side view schematically showing a modified example of the semiconductor device and the wiring board of the present invention.
- FIG. 5A is a process drawing for describing a first embodiment of a method for manufacturing a wiring board according to the present invention.
- FIG. 5B is a process drawing showing a step that follows the step of FIG. 5A.
- FIG. 5C is a process drawing showing a step that follows FIG. 5B.
- FIG. 5D is a step view showing a step that follows the step of FIG. 5C.
- FIG. 6A is a cross-sectional view for explaining a method of forming the land portion when the land portion is formed on the contact plug of the second wiring portion.
- FIG. 6B is a cross-sectional view showing a step that follows the step shown in FIG. 6A.
- FIG. 7A is a process diagram illustrating a second embodiment of the method for manufacturing a wiring board according to the present invention.
- FIG. 7B is a cross-sectional view showing a step that follows the step shown in FIG. 7A.
- FIG. 7C is a cross-sectional view showing a step that follows the step shown in FIG. 7B.
- FIG. 7D is a cross-sectional view showing a step that follows the step shown in FIG. 7C.
- FIG. 8 is a cross-sectional view for explaining another method for forming a land portion when a land portion is formed on a contact plug of a second wiring portion.
- a semiconductor device 50 shown in FIG. 1 corresponds to the first embodiment of the semiconductor device of the present invention, and a plurality of semiconductor chips 30 are flip-chip bonded to a wiring board 20. However, only one semiconductor chip 30 appears in FIG.
- the above-mentioned wiring board 20 corresponds to the first embodiment of the wiring board of the present invention, and this wiring board 20 is electrically connected to the first wiring section 10 and the first wiring section 10.
- the bracket includes a first wiring portion 10 and a second wiring portion 15 integrated in the thickness direction (that is, laminated on the first wiring portion 10).
- a plurality of wiring layers 1 are formed inside the first wiring section 10, and an interlayer insulating film 3 is formed around each of the wiring layers 1.
- a plurality of external connection bumps 5 are formed on one surface side of the first wiring portion 10 in the thickness direction, each of which is electrically connected to a predetermined wiring layer 1.
- the second wiring portion 15 has a base material 12 and a connection terminal 14 penetrating the base material 12 in the thickness direction.
- the total number of connection terminals 14 can be the same as the total number of electrode terminals 25 formed on each semiconductor chip 30, for example.
- Each connection terminal 14 is formed of a contact plug (hereinafter, referred to as “contact plug 14”) provided in a through-hole penetrating the second wiring portion 15 (base 12) in the thickness direction.
- Each contact plug 14 has a thin land portion 14a on the first wiring portion 10 side.
- the second wiring portion 15 is integrally formed with the first wiring portion 10 in the thickness direction, with the land portions 14a of the individual contact plugs 14 being in direct contact with the predetermined wiring layers 1, respectively.
- the size of the second wiring portion 15 in plan view is equal to the size of the first wiring portion 10 in plan view. That is, the sizes of the first wiring portion 10 and the second wiring portion 15 facing each other are equal.
- the size of the second wiring portion 15 in plan view is equal to the size of the first wiring portion 10 in plan view” refers to the area of the second wiring portion 15 in plan view.
- the area of the first wiring section 10 in plan view that is, the difference between the areas of the mutually facing surfaces of the second wiring section 15 and the first wiring section 10 is about 1500 mm 2 or less. .
- Each of the above semiconductor chips 30 is, for example, an integrated circuit such as an LSI formed on a silicon substrate 23.
- Each of the electrode terminals 25 formed on these semiconductor chips 30 has It is connected to a predetermined contact plug 14 by an internal connection bump 35.
- the gap between the semiconductor chip 30 and the second wiring section 15 and the periphery thereof may be filled with a resin 40 as shown to reinforce the joint between the semiconductor chip 30 and the second wiring section 15. Can be done.
- a resin that does not generate excessive stress at the joint between the semiconductor chip 30 and the second wiring portion 15, such as an epoxy resin may be appropriately selected. preferable.
- only the periphery of the semiconductor chip 30 may be sealed with the resin 40.
- the coefficient of thermal expansion of the second wiring unit 15 is smaller than the coefficient of thermal expansion of the first wiring unit 10 and the coefficient of thermal expansion of the second wiring unit 15
- the material of the base material 12 in the second wiring portion 15 is selected so as to be equal to the coefficient of thermal expansion of the chip 30.
- each semiconductor chip 30 is a silicon chip, silicon, ceramics, or photosensitive glass can be used as the material of the base material 12. By using these materials, it is easy to make the coefficient of thermal expansion of the second wiring portion 15 equal to the coefficient of thermal expansion of the semiconductor chip 30.
- the coefficient of thermal expansion of the second wiring section 15 is smaller than the coefficient of thermal expansion of the first wiring section 10
- the coefficient of thermal expansion of the entire second wiring section 15 is Means smaller than the coefficient of thermal expansion at.
- the thermal expansion coefficient of the second wiring portion 15 is equal to the thermal expansion coefficient of the semiconductor chip 30
- the thermal expansion coefficient of the entire second wiring portion 15 and the thermal expansion coefficient of the entire semiconductor chip 30 are different. Means less than about 10ppmZ ° C.
- the coefficient of thermal expansion of the second wiring portion 15 is equal to the coefficient of thermal expansion of each semiconductor chip 30, in the semiconductor device 50, the difference in the coefficient of thermal expansion between the semiconductor chip 30 and the wiring board 20 Partial stress can be suppressed. Further, when the semiconductor device 50 is surface-mounted on a mother board, the first wiring section 10 and the second wiring section 15 are interposed between the semiconductor chip 30 and the mother board. The internal stress caused by the difference in the coefficient of thermal expansion between the chip 30 and the motherboard is also reduced.
- the size of the second wiring portion 15 in plan view is equal to the size of the first wiring portion 10 in plan view, other elements in addition to the semiconductor chips 30 are mounted on the wiring board 20. Even if the semiconductor device 50 is mounted on the semiconductor device 50 to improve the performance thereof, only one second wiring portion 15 needs to be formed, and it is easy to mount the other elements on the second wiring portion 15. is there. An embodiment in which another element is mounted will be described later.
- the semiconductor device 50 it is easy to respond to high performance and to obtain a highly reliable device. Further, when the semiconductor device 50 is mounted on a mother board to form an electronic device, it is easy to obtain a highly reliable and high-performance electronic device.
- a semiconductor device 120 shown in FIG. 2 corresponds to the second embodiment of the semiconductor device of the present invention, and includes a plurality of semiconductor chips 30 (however, only one semiconductor chip 30 appears in FIG. 2). Next, the second semiconductor chip 80 and the passive component 100 are mounted on the wiring board 70.
- the wiring board 70 corresponds to a second embodiment of the wiring board of the present invention.
- a plurality of semiconductor chips 30, a second semiconductor chip 80, and a passive component 100 are mounted in the wiring board 70.
- the number of wiring layers (not shown) in the first wiring section 60, the shape of each wiring layer, and the number and arrangement of the external connection bumps 55 are selected so that The number and arrangement of the contact plugs 64 provided on the base material 64 of the second wiring portion 65 are selected.
- Reference numeral “64a” in FIG. 2 indicates a land formed at one end of the contact plug 64.
- the configuration of the semiconductor chip 30 is the same as the configuration of the semiconductor chip 30 in the semiconductor device 50 of the first embodiment shown in FIG. 1, and thus the semiconductor chip 30 and its constituent members are used in FIG.
- Each electrode terminal 25 formed on the semiconductor chip 30 is connected to a predetermined contact plug 64 by an internal connection bump 35, and the description is omitted by attaching the same reference numeral to the reference numeral. .
- the second semiconductor chip 80 is, for example, an integrated circuit formed on a silicon substrate 73.
- the second semiconductor chip 80 is mounted on the second wiring portion 65 without using solder bumps by flip chip bonding. Have been. Therefore, each electrode terminal 75 formed on the second semiconductor chip 80 is directly connected to a predetermined contact plug 64, respectively. If necessary, a resin 85 is filled into the gap between the second semiconductor chip 80 and the second wiring section 65 and the periphery thereof as shown in the figure, and the joint between the second semiconductor chip 80 and the second wiring section 65 is formed. Can be reinforced.
- the passive component 100 is, for example, a functional element such as a capacitor or a resistor.
- Each electrode terminal 95 formed on the passive component 100 is connected to a predetermined contact plug 64 via a solder bump 105. It is connected.
- resin 110 may be filled into the gap between the passive component 100 and the second wiring section 65 and the periphery thereof as shown in the figure to reinforce the joint between the passive component 100 and the second wiring section 65. it can.
- the semiconductor layer 120 having the above-described configuration as in the semiconductor device 50 of the first embodiment shown in FIG. It is equivalent to the size in plan view.
- the coefficient of thermal expansion of the second wiring section 65 is smaller than the coefficient of thermal expansion of the first wiring section 60, and the coefficient of thermal expansion of the second wiring section 65 is equal to the coefficient of thermal expansion of each semiconductor chip 30.
- the material of the base material 62 in the second wiring portion 65 is selected.
- the internal stress caused by the difference in the coefficient of thermal expansion between the semiconductor chip 30 and the wiring board 70 can be suppressed. Further, it is also possible to suppress the internal stress caused by the difference in the coefficient of thermal expansion between the second semiconductor chip 80 and the passive component 100 and the wiring board 70.
- the semiconductor device 120 is surface-mounted on a mother board, the first wiring section 60 and the second wiring section 60 are provided between the mother board and each of the semiconductor chip 30, the second semiconductor chip 80, and the passive component 100. Since the part 65 is interposed, the internal stress caused by the difference in the coefficient of thermal expansion between each of the semiconductor chip 30, the second semiconductor chip 80, and the passive component 100 and the mother board is also reduced. Further, since the size of the second wiring portion 65 in plan view is equal to the size of the first wiring portion 60 in plan view, only one second wiring portion 65 may be formed.
- the semiconductor device 120 it is easy to cope with high performance and it is easy to obtain a device having high reliability. Further, when the semiconductor device 120 is mounted on a mother board to form an electronic device, it is easy to obtain a highly reliable and high-performance electronic device.
- a semiconductor device 140 shown in FIG. 3 corresponds to a third embodiment of the semiconductor device of the present invention, and includes a plurality of semiconductor chips 30 (however, only one semiconductor chip 30 appears in FIG. 3). Then, the passive component 100 and the third semiconductor chip 130 are mounted on the wiring board 70.
- the wiring board 70 has the same configuration as the wiring board 70 in the semiconductor device 120 of the second embodiment shown in FIG. 2, the wiring board 70 and its constituent members are the same as those in FIG.
- the same reference numerals as those used in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- the passive component 100 has the same configuration as the passive component 100 in the semiconductor device 120 of the second embodiment shown in FIG. 2, the passive component 100 and its constituent members are described in FIG.
- the same reference numerals as those used in are used and the description thereof will be omitted.
- the third semiconductor chip 130 is, for example, an integrated circuit formed on a silicon substrate 123.
- the third semiconductor chip 130 is wire-bonded on the second wiring section 65 using a thin metal wire 127. ing.
- Each electrode terminal 125 formed on the third semiconductor chip 130 is connected to a predetermined contact plug 64 by a thin metal wire 127.
- the semiconductor device 130 having the above-described configuration has the same technical effects as the semiconductor device 120 of the above-described second embodiment.
- a plurality of semiconductor chips are flip-chip bonded on a wiring board, but one semiconductor chip may be flip-chip bonded on a wiring board. Whether or not a force for mounting an element other than the at least one semiconductor chip on the wiring board can be appropriately selected.
- the type of element to be mounted is appropriately selected according to the functions and performance required of the semiconductor device to be manufactured.
- the mounting form may be wireless bonding or wire bonding. From the viewpoint of increasing the mounting density, wireless bonding is preferred. In consideration of the productivity of the semiconductor device, it is preferable to mount the semiconductor device by flip-chip bonding similarly to the semiconductor chip.
- a desired number of reinforcing frame members can be arranged on the second wiring portion.
- a plurality of reinforcing frame members may be arranged, and a heat radiating plate may be provided on these reinforcing frame members so as to cover a mounting component such as a semiconductor chip.
- the first wiring portion and the second wiring portion in the above-described wiring board are formed, for example, by forming a first wiring portion on a base material constituting the second wiring portion, and then forming a second wiring portion. Can be integrated. Alternatively, after the first wiring portion and the second wiring portion are manufactured separately from each other, they are joined together using an adhesive resin, so that they can be integrated. Further, when the interlayer insulating film constituting the first wiring portion is formed of resin, the first wiring portion and the second wiring portion are separately manufactured, and then the second wiring portion is formed on the first wiring portion. And put The first wiring portion and the second wiring portion may be cooled by heating the inter-layer insulating film and then cooling it while pressing the second wiring portion toward the first wiring portion as necessary. Can be integrated.
- the electrical continuity between the first wiring portion and the second wiring portion is determined by, for example, a conductive property such as a solder bump. It can also be achieved through materials. In this case, if necessary, the gap between the first wiring section and the second wiring section and the periphery thereof may be filled with resin to reinforce the joint between the first wiring section and the second wiring section.
- At least one functional element 160 may be formed on the surface of the first wiring portion 10 or the second wiring portion 15 on the side of the first wiring portion 10 as necessary. it can.
- the functional element 160 is, for example, a capacitor, a decoupling capacitor, a resistor, an inductor, or the like.
- the number of contact plugs formed in the second wiring portion is determined by the sum of the electrode terminals of at least one semiconductor chip to be mounted on the second wiring portion, and the number of contact elements other than the semiconductor chip. In the case of mounting, it can be appropriately selected in consideration of the sum of the electrode terminals of the element.
- a contact plug may be formed in the second wiring portion such that one electrode terminal corresponds to each of the electrode terminals formed on each of the semiconductor chips.
- Preferred Force to add a relaxation layer to achieve relaxation of internal stress Even if one such layer is added, by forming a contact plug as described above, On the other hand, it is not necessary to route the wiring in the second wiring portion, and it becomes easy to suppress the internal stress while maintaining the characteristics of each semiconductor chip as designed or close to the design values.
- the functional element 160 such as a decoupling capacitor is provided between the second wiring section and the first wiring section, for example, it is desirable to install the functional element at a position as close as possible to the electrode of the semiconductor chip.
- each contact plug in the second wiring portion may be a shape having no land portion at the longitudinal end, or may have a land portion at one or both ends in the longitudinal direction. Shape. Whether or not the contact plug has a land can be appropriately selected.
- the method for manufacturing a wiring board includes a step of forming a first wiring portion having a plurality of wiring layers and a plurality of external connection bumps, and a step of forming a plurality of connection terminals in a state connectable to at least one semiconductor chip. Forming the two wiring portions integrally in the thickness direction of the first wiring portion. Note that the connection terminal has a contact plug force provided in a through-hole penetrating the second wiring portion in the thickness direction, and the first wiring portion and the second wiring portion have the same size of the surface facing each other. As described above, the thermal expansion coefficient of the second wiring section is smaller than the thermal expansion coefficient of the first wiring section and is equal to the thermal expansion coefficient of the semiconductor chip.
- the first embodiment of the method of manufacturing a wiring board includes forming a plurality of recesses on one surface in a thickness direction of a substrate for a second wiring portion, and filling the plurality of recesses with a conductive material.
- Lateral force A third step of thinning the base material and exposing the conductive material filling the recess to form a contact plug to obtain a second wiring portion.
- the second step belongs to the step of forming the first wiring section, and the first step and the third step belong to the step of forming the second wiring section.
- a thin silicon substrate for example, a silicon wafer
- a substrate for the second wiring portion a substrate for the second wiring portion
- the base material for the second wiring portion for example, when the plurality of semiconductor chips mounted on the wiring substrate to be manufactured are silicon chips, a material made of ceramics or photosensitive glass is used. .
- a silicon substrate (hereinafter simply referred to as “substrate”) for the second wiring portion is used.
- a plurality of recesses are formed on one surface in the thickness direction, and the plurality of recesses are filled with a conductive material.
- the thickness of the above-mentioned base material can be appropriately selected, for example, within a range of about 100 to 750 / ⁇ .
- an electric insulating layer 203 is formed using, for example, silicon oxide, silicon nitride, silicon carbide, fluorine-doped silicon oxide, silicon oxycarbide, or the like.
- the substrate 200 is etched from the above opening to a desired depth by reactive 'ion' etching (RIE). .
- RIE reactive 'ion' etching
- the concave portion 205 can be formed at a desired position of the base material 200.
- the depth of the concave portion 205 can be appropriately selected, for example, within a range of about 50 to 500 ⁇ m.
- the diameter can be appropriately selected within a range of, for example, about 10 to 150 / ⁇ .
- TEOS Si (OC H) 2
- a silicon oxide is deposited by a plasma CVD method using 254 as one of the source gases to form an electrical insulating film, and copper is deposited thereon by, for example, a sputtering method.
- an electric insulating film (silicon oxide film) formed by a plasma CVD method and copper deposited by a sputtering method are represented by one layer 207.
- the electric insulating film can be formed with high coverage, a desired electric insulating film can be easily formed even if the depth of the concave portion 205 is large.
- the copper deposited on the above-mentioned electrical insulating film functions as a seed when copper is applied by a damascene method (a type of plating method).
- copper plating is performed by a damascene method to fill the recess 205 with a copper plating layer, and the copper plating layer formed by the damascene method is flattened by chemical mechanical polishing (CMP).
- CMP chemical mechanical polishing
- the copper plating layer at unnecessary portions is removed by etching with force, and the copper plating layer 210 is left in the concave portion 205 and around the concave portion 205 as shown in FIG. 5B. Remains around recess 205
- the copper plating layer 210a functions as a land portion in a contact plug described later.
- the recess 205 In addition to filling the recess 205 by copper plating by the damascene method, it is also possible to fill the recess 205 by depositing a conductive material by a chemical vapor deposition (CVD) method. Further, as the conductive material, a metal material other than copper or a conductive resin can be used.
- CVD chemical vapor deposition
- a functional element (160) such as a capacitor, a resistor, or an inductor may be formed on one surface in the thickness direction of the base material 200 by a thin film process. Since the substrate 200 is made of silicon, it is possible to form the functional element (160) with high accuracy by using various semiconductor diffusion processes. In addition, costs such as capital investment can be easily suppressed.
- the first wiring portion is formed on the one surface of the base material 200.
- the first wiring portion can be formed by, for example, a so-called build-up method.
- a first sub-step of forming an electric insulating film to be an interlayer insulating film for example, (1) a first sub-step of forming an electric insulating film to be an interlayer insulating film, (2) a predetermined number of via holes are formed in the electric insulating film, and the via holes are formed by laser processing.
- the fourth sub-process force S to be formed is repeated a desired number of times in this order.
- a desired region in the wiring layer positioned as the uppermost layer that is, a region excluding a region R to be used as a land portion is made of polyimide or the like.
- the first wiring portion can be obtained by forming an external connection bump on the force region R by covering with a solder resist. However, the formation of the external connection bumps is preferably performed after the third
- FIG. 5C is a cross-sectional view schematically showing a first wiring portion 220 (excluding external connection bumps) formed by a build-up method on the base material 200 having undergone the first step.
- the illustrated first wiring section 220 has three interlayer insulating films 217a, 217b, 217c and three wiring layers 215a, 215b, 215c.
- a solder resist layer 218 having an opening 218a at a predetermined position is formed.
- the area R of the wiring layer 215c that is exposed from the opening 218a is used as a land portion.
- a functional element (160) such as a vessel or an inductor can be built.
- these functional elements (160) it becomes easy to fabricate a wiring board capable of obtaining a semiconductor device with improved high-speed operation and the like.
- an interlayer insulating film 217b is formed of a ferroelectric material, and a structure in which the interlayer insulating film 217b is sandwiched between a power supply line and a ground line in the wiring layers 215a and 215b is formed to form a parallel plate type capacitor. It can function as a decoupling capacitor.
- the thickness of the substrate 200 is reduced from the other surface side in the thickness direction of the substrate 200 (see FIG. 5C) that has passed through the second step, and the concave portion 205 formed in the substrate 200 in the first step is formed.
- the buried conductive material (copper-plated layer 210) is exposed, thereby forming a contact plug to obtain a second wiring portion.
- FIG. 5D is a cross-sectional view schematically showing second wiring portion 230 formed in this manner.
- the second wiring portion 230 In forming the second wiring portion 230, first, in order to protect the solder resist layer 218 and the region R formed in the second step, a support 219 covering these is provided. Next, the base material 200 is thinned by mechanical polishing from the other surface side in the thickness direction of the base material 200 to a desired thickness, and further thinned by RIE to be formed on the bottom surface of the concave portion 205. The layer 207 is exposed, and then further polished by CMP until the copper plating layer 210 formed in the recess 205 is exposed. Thereby, the second wiring section 230 can be obtained.
- the exposed copper plating layer 210 functions as a contact plug (hereinafter, referred to as “contact plug 210A”, and is also indicated by reference numeral “210A” in FIG. 5D).
- a layer having a strain is usually formed on the surface after the mechanical polishing, and depending on the conditions, a microcrack may be generated, which may cause a reduction in reliability. Careful consideration must be given to conditions such as the amount removed by polishing and the cutting speed. Also, as long as the reliability is not affected, the thickness can be reduced by mechanical polishing.
- the base material 200 having a reduced thickness is indicated by reference numeral “200A”.
- a land portion can be formed on contact plug 210A.
- This land can be formed, for example, as follows.
- a first electrical connection is formed on the second wiring portion 230 by using silicon oxide or the like.
- An insulating film 240 is formed, and the first electric insulating film 240 is blown by photolithography to form an opening 240a on the contact plug 210A.
- a conductive film 242 having a desired shape is formed so as to fill the opening 240a, and the protective film 244 covering the conductive film 242 is formed of a silicon oxide, a silicon nitride, and a silicon carbide.
- an area of the protective film 244 located above the contact plug 210A is removed to form an opening 244a therein.
- the region of the conductive film 242 exposed to the opening 244a becomes the land 210b.
- the support 219 is peeled off and removed, and then the external connection bar is formed. It is obtained by forming a pump.
- the second embodiment of the method of manufacturing a wiring board includes a first step of forming at least a part of a first wiring portion on one surface in a thickness direction of a substrate for a second wiring portion, and a second wiring portion.
- the first step belongs to the step of forming the first wiring section, and the second step and the third step belong to the step of forming the second wiring section.
- a thin silicon substrate for example, a silicon wafer
- a substrate for the second wiring portion a substrate for the second wiring portion
- the base material for the second wiring portion for example, when the plurality of semiconductor chips mounted on the wiring substrate to be manufactured are silicon chips, a material made of ceramics or photosensitive glass is used. .
- first wiring portion is formed on one surface in the thickness direction of the base material for the second wiring portion.
- substrate silicon substrate
- an electric insulating layer is previously formed on the surface on which the first wiring portion is to be formed. It is preferable to provide them.
- first wiring portion 330 is formed on electric insulating layer 303 provided on base material 300.
- the first wiring section 330 can be formed, for example, according to the second step in the manufacturing method of the first embodiment described above.
- the first wiring section 330 shown in FIG. 7A is similar to the first wiring section 330 shown in FIG.
- a conductive layer 310 as a connection section connected to a contact plug described later is formed at a predetermined position on the electric insulating layer 303.
- each component is given a reference numeral obtained by adding ⁇ 100 '' to the numerical part of the reference numeral used in the first wiring section 220 shown in FIG.5C. The description is omitted.
- the external connection bump is not formed in the first step, but is formed after a third step described later.
- Reference numeral “319” in FIG. 7A indicates a support for protecting a predetermined region R (region used as a land portion) in the solder resist layer 318 and the wiring layer 315c.
- the other surface-side force in the thickness direction of the base material 300 that has passed through the first step also forms a plurality of through holes that penetrate the base material 300.
- the base material 300 Prior to the formation of the through holes, the base material 300 can be thinned as necessary.
- the base material 300 is preferably thin in order to form the contact plug with high accuracy.
- the thickness of the base material 300 can be reduced by reducing the thickness to a desired thickness by mechanical polishing, and then further reducing the thickness of at least a region where a through hole is to be formed and its vicinity by RIE. .
- the rigidity of the base material after thinning can be kept relatively high. .
- the electric insulating layer 340 is formed by silicon carbide or the like, and the electric insulating layer 340 is patterned by lithography to form an opening at a predetermined position.
- RIE etching the opening force
- the opening force also etches the substrate 300A over the entire length in the thickness direction.
- a through hole 345 is formed.
- each of the plurality of through holes 345 formed in the second step is filled with a conductive material, and the conductive material filling the plurality of through holes 345 is formed into a contact plug to form a second wiring portion. obtain.
- damascene is applied to the inner surface of the through hole 345 and the surface of the electrical insulating layer 340 according to the first step of the manufacturing method of the first embodiment described above.
- a copper layer 348 serving as a seed in the method is formed.
- copper plating is performed by a damascene method, and the through holes 345 are filled with a copper plating layer 350.
- a copper plating layer 350 is also formed on the electric insulating layer 340.
- the copper plating layer 350 is flattened by, for example, CMP, and then the copper plating layer 350 and the layer 348 thereunder are patterned by etching to obtain a desired layer as shown in FIG. 7D.
- a contact plug 355 having a shape is formed.
- the second wiring section 360 is obtained, and at the same time, the wiring board 400 is obtained.
- copper plating layer 350a in this portion can be used as a land portion.
- the region of the upper surface of the contact plug 350 that is not covered by the electric insulating layer 370 functions as a land portion.
- the above-mentioned electric insulating layer 370 is obtained, for example, by forming an electric insulating layer serving as a base material thereof and forming an opening 370a (see FIG. 8) at a predetermined position of the electric insulating layer.
- the support 319 is peeled off and removed. It is obtained by forming a pump.
- the second wiring portion was formed after the formation of the first wiring portion (excluding external connection bumps). After the formation, the first wiring portion can be formed.
- a wiring board can also be obtained by separately manufacturing the first wiring portion and the second wiring portion and then bonding them using an adhesive resin. Furthermore, when the interlayer insulating film constituting the first wiring portion is formed of resin, the first wiring portion and the second wiring portion are separately manufactured, and then the second wiring portion is formed on the first wiring portion. The first wiring portion and the first wiring portion are also cooled by heating the inter-layer insulating film and then cooling it while pressing the second wiring portion toward the first wiring portion side as necessary. The two wiring portions can be integrated.
- the electrical continuity between the first wiring portion and the second wiring portion is established by using a separately prepared conductive material (for example, solder bumps can be used.
- solder bumps can be used.
- the gap between the first wiring section and the second wiring section and the periphery thereof are filled with resin to reinforce the joint between the first wiring section and the second wiring section. Can be.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US11/569,423 US7525189B2 (en) | 2004-05-21 | 2005-05-18 | Semiconductor device, wiring board, and manufacturing method thereof |
JP2006513703A JP4844391B2 (ja) | 2004-05-21 | 2005-05-18 | 半導体装置並びに配線基板及びその製造方法 |
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JP2004152618 | 2004-05-21 | ||
JP2004-152618 | 2004-05-21 |
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WO2005114728A1 true WO2005114728A1 (ja) | 2005-12-01 |
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PCT/JP2005/009061 WO2005114728A1 (ja) | 2004-05-21 | 2005-05-18 | 半導体装置並びに配線基板及びその製造方法 |
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US (1) | US7525189B2 (ja) |
JP (2) | JP4844391B2 (ja) |
CN (1) | CN100552926C (ja) |
WO (1) | WO2005114728A1 (ja) |
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WO2005114729A1 (ja) * | 2004-05-21 | 2005-12-01 | Nec Corporation | 半導体装置及び配線基板 |
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- 2005-05-18 CN CNB2005800163883A patent/CN100552926C/zh active Active
- 2005-05-18 WO PCT/JP2005/009061 patent/WO2005114728A1/ja active Application Filing
- 2005-05-18 JP JP2006513703A patent/JP4844391B2/ja active Active
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2011
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JP2001007248A (ja) * | 1999-06-25 | 2001-01-12 | Ibiden Co Ltd | パッケージ基板 |
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US8766101B2 (en) | 2011-09-07 | 2014-07-01 | Shinko Electric Industries Co., Ltd. | Wiring substrate, method for manufacturing wiring substrate, and semiconductor package including wiring substrate |
JP2017152870A (ja) * | 2016-02-23 | 2017-08-31 | 太陽誘電株式会社 | 弾性波デバイス |
Also Published As
Publication number | Publication date |
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JP5576334B2 (ja) | 2014-08-20 |
CN1957464A (zh) | 2007-05-02 |
JP4844391B2 (ja) | 2011-12-28 |
US20080001309A1 (en) | 2008-01-03 |
US7525189B2 (en) | 2009-04-28 |
JPWO2005114728A1 (ja) | 2008-07-31 |
CN100552926C (zh) | 2009-10-21 |
JP2011155310A (ja) | 2011-08-11 |
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