WO2015083629A1 - 光半導体装置用熱硬化性樹脂組成物およびそれを用いて得られる光半導体装置用リードフレーム、ならびに光半導体装置 - Google Patents
光半導体装置用熱硬化性樹脂組成物およびそれを用いて得られる光半導体装置用リードフレーム、ならびに光半導体装置 Download PDFInfo
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- WO2015083629A1 WO2015083629A1 PCT/JP2014/081497 JP2014081497W WO2015083629A1 WO 2015083629 A1 WO2015083629 A1 WO 2015083629A1 JP 2014081497 W JP2014081497 W JP 2014081497W WO 2015083629 A1 WO2015083629 A1 WO 2015083629A1
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- optical semiconductor
- semiconductor device
- thermosetting resin
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- XXBDWLFCJWSEKW-UHFFFAOYSA-N dimethylbenzylamine Chemical compound CN(C)CC1=CC=CC=C1 XXBDWLFCJWSEKW-UHFFFAOYSA-N 0.000 description 1
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical class C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- FPVGTPBMTFTMRT-NSKUCRDLSA-L fast yellow Chemical compound [Na+].[Na+].C1=C(S([O-])(=O)=O)C(N)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 FPVGTPBMTFTMRT-NSKUCRDLSA-L 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- VANNPISTIUFMLH-UHFFFAOYSA-N glutaric anhydride Chemical compound O=C1CCCC(=O)O1 VANNPISTIUFMLH-UHFFFAOYSA-N 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- CZWLNMOIEMTDJY-UHFFFAOYSA-N hexyl(trimethoxy)silane Chemical compound CCCCCC[Si](OC)(OC)OC CZWLNMOIEMTDJY-UHFFFAOYSA-N 0.000 description 1
- WJRBRSLFGCUECM-UHFFFAOYSA-N hydantoin Chemical compound O=C1CNC(=O)N1 WJRBRSLFGCUECM-UHFFFAOYSA-N 0.000 description 1
- 229940091173 hydantoin Drugs 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- YTVNOVQHSGMMOV-UHFFFAOYSA-N naphthalenetetracarboxylic dianhydride Chemical compound C1=CC(C(=O)OC2=O)=C3C2=CC=C2C(=O)OC(=O)C1=C32 YTVNOVQHSGMMOV-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- ZCLUFPPYOPQBQL-UHFFFAOYSA-N oxiran-2-ylmethanamine 1,3,5-triazinane-2,4,6-trione Chemical class NCC1CO1.O=c1[nH]c(=O)[nH]c(=O)[nH]1 ZCLUFPPYOPQBQL-UHFFFAOYSA-N 0.000 description 1
- 150000004965 peroxy acids Chemical class 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000003003 phosphines Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical class OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- RKHXQBLJXBGEKF-UHFFFAOYSA-M tetrabutylphosphanium;bromide Chemical compound [Br-].CCCC[P+](CCCC)(CCCC)CCCC RKHXQBLJXBGEKF-UHFFFAOYSA-M 0.000 description 1
- UFDHBDMSHIXOKF-UHFFFAOYSA-N tetrahydrophthalic acid Natural products OC(=O)C1=C(C(O)=O)CCCC1 UFDHBDMSHIXOKF-UHFFFAOYSA-N 0.000 description 1
- BRKFQVAOMSWFDU-UHFFFAOYSA-M tetraphenylphosphanium;bromide Chemical compound [Br-].C1=CC=CC=C1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 BRKFQVAOMSWFDU-UHFFFAOYSA-M 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- WUMSTCDLAYQDNO-UHFFFAOYSA-N triethoxy(hexyl)silane Chemical compound CCCCCC[Si](OCC)(OCC)OCC WUMSTCDLAYQDNO-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical class OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000010969 white metal Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—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
- 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
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—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
- 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
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—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
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48257—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a die pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12041—LED
Definitions
- the present invention includes, for example, a thermosetting resin composition for an optical semiconductor device, which is a material for forming a reflector (reflecting portion) that reflects light emitted from an optical semiconductor element, and a lead frame for an optical semiconductor device obtained using the same.
- the present invention also relates to an optical semiconductor device.
- an optical semiconductor device in which an optical semiconductor element is mounted has an optical semiconductor element 3 on a metal lead frame composed of a first plate portion 1 and a second plate portion 2, for example, as shown in FIG.
- a light reflecting reflector 4 made of a resin material is formed so as to be mounted and to surround the optical semiconductor element 3 so as to fill the space between the first plate portion 1 and the second plate portion 2. It takes the composition that it is.
- the optical semiconductor element 3 mounted in the recess 5 formed as the inner peripheral surface of the metal lead frame and the reflector 4 is resin-sealed using a transparent resin such as a silicone resin containing a phosphor as necessary. By doing so, the sealing resin layer 6 is formed.
- 7 and 8 are bonding wires for electrically connecting the metal lead frame and the optical semiconductor element 3, which are provided as necessary.
- the reflector 4 is manufactured by using, for example, transfer molding or the like, using a thermosetting resin typified by an epoxy resin or the like.
- a thermosetting resin typified by an epoxy resin or the like.
- ceramics has been conventionally used. Therefore, there is a problem that cracking occurs when thinly formed.
- this problem is solved by the reflector made of the thermosetting resin.
- titanium oxide is blended in the thermosetting resin as a white pigment, and light emitted from the optical semiconductor element 3 is reflected (see Patent Document 1).
- An object of the present invention is to provide a conductive resin composition, a lead frame for an optical semiconductor device obtained using the same, and an optical semiconductor device.
- the present invention is a material for forming a reflector of an optical semiconductor device having a thickness of the thinnest portion of 0.2 mm or less, and contains the following components (A) and (B):
- the thermosetting resin composition for optical semiconductor devices is a first gist.
- the present invention is a plate-shaped lead frame for an optical semiconductor device for mounting an optical semiconductor element only on one surface in the thickness direction, and includes a plurality of plate portions arranged with a gap therebetween, and A lead frame for an optical semiconductor device in which a gap is formed by filling the gap with the thermosetting resin composition for an optical semiconductor device according to the first aspect and curing it is a second aspect.
- the present invention is a three-dimensional lead frame for an optical semiconductor device comprising an optical semiconductor element mounting region, wherein a reflector is formed in a state surrounding at least a part of the optical semiconductor element mounting region,
- a third aspect of the present invention is an optical semiconductor device lead frame in which the reflector is formed using the thermosetting resin composition for an optical semiconductor device of the first aspect.
- a plate portion having an element mounting area for mounting an optical semiconductor element on one side thereof is arranged with a gap therebetween, and the optical semiconductor element is mounted at a predetermined position of the element mounting area.
- An optical semiconductor device, wherein the gap is filled with the thermosetting resin composition for optical semiconductor devices according to the first aspect and a reflector formed by curing is formed.
- the present invention also provides an optical semiconductor element at a predetermined position of a lead frame for an optical semiconductor device, which includes an optical semiconductor element mounting region, and in which a reflector is formed so as to surround at least a part of the optical semiconductor element.
- An optical semiconductor device in which the reflector is formed using the thermosetting resin composition for optical semiconductor devices according to the first aspect is a fifth aspect.
- zirconium oxide is used instead of titanium oxide that has been conventionally used as a white pigment. Recalled. And in order to show high initial light reflectivity etc., even if the thickness of the thinnest part of a reflector is 0.2 mm or less, it pays attention to the particle size distribution of zirconium oxide in a reflector, this inventor. Conducted various experiments.
- the ratio (D95 / D5) of the 95% cumulative particle size (D95) and the 5% cumulative particle size (D5) of zirconium oxide in the cured body of the thermosetting resin composition as the reflector material is 1. At ⁇ 100, it was found that the intended purpose could be achieved, and the present invention was reached.
- the present invention is a thermosetting resin composition for an optical semiconductor device containing the thermosetting resin (A) and zirconium oxide (B) having a specific cumulative particle size distribution. For this reason, even if it shape
- the average particle diameter (D50) of the zirconium oxide as the component (B) in the thermosetting resin cured body is in a specific range, a higher initial light reflectance and the like are provided.
- FIG. 10 is a cross-sectional view taken along the line XX ′ of the plan view schematically showing another configuration of the optical semiconductor device.
- thermosetting resin composition for optical semiconductor devices of the present invention (hereinafter also referred to as “thermosetting resin composition”) is, for example, as described above, the optical semiconductor device shown in FIG. 3 is used as a material for forming the reflectors 4 and 11 in the optical semiconductor device shown in FIG. 3, and is applied to a portion where the thickness of the thinnest portion in the reflectors 4 and 11 is 0.2 mm or less. .
- thermosetting resin composition of the present invention is obtained using a thermosetting resin (component A) and zirconium oxide (component B) showing a specific cumulative particle size distribution.
- it is used as a material for forming the reflectors 4 and 11 in the form of a sheet, a powder, or a tablet obtained by tableting the powder.
- thermosetting resin examples include epoxy resins and silicone resins. These may be used alone or in combination.
- epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, novolak type epoxy resin such as phenol novolac type epoxy resin and cresol novolac type epoxy resin, monoglycidyl isocyanurate, di Nitrogen-containing ring epoxy resins such as glycidyl isocyanurate, triglycidyl isocyanurate, hydantoin epoxy resin, hydrogenated bisphenol A type epoxy resin, hydrogenated bisphenol F type epoxy resin, aliphatic epoxy resin, silicone modified epoxy resin, glycidyl ether type Polyamines and epichlorohydres such as epoxy resins, diglycidyl ethers such as alkyl-substituted bisphenols, diaminodiphenylmethane and isocyanuric acid Glycidylamine type epoxy resin obtained by reaction with ethylene, linear aliphatic and alicyclic epoxy resins obtained by oxidizing olefinic bonds with peracids such as
- epoxy resins may be used alone or in combination of two or more.
- an alicyclic epoxy resin or an isocyanuric ring structure such as triglycidyl isocyanurate alone or in combination from the viewpoint of excellent transparency and discoloration resistance.
- diglycidyl esters of dicarboxylic acids such as phthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid, methyltetrahydrophthalic acid, nadic acid and methylnadic acid are also suitable.
- glycidyl esters such as nuclear hydrogenated trimellitic acid and nuclear hydrogenated pyromellitic acid having an alicyclic structure in which an aromatic ring is hydrogenated.
- the epoxy resin may be solid or liquid at normal temperature, but in general, the epoxy resin used preferably has an average epoxy equivalent of 90 to 1,000. From the viewpoint of convenience, a softening point of 50 to 160 ° C. is preferable. That is, if the epoxy equivalent is too small, the cured product of the thermosetting resin composition may become brittle. Moreover, it is because the glass transition temperature (Tg) of a thermosetting resin composition hardened
- Tg glass transition temperature
- a curing agent When using the epoxy resin as the thermosetting resin (component A), a curing agent is usually used.
- the curing agent include an acid anhydride curing agent and an isocyanuric acid derivative curing agent. These may be used alone or in combination of two or more. Among these, it is preferable to use an acid anhydride curing agent from the viewpoint of heat resistance and light resistance.
- acid anhydride curing agent examples include phthalic anhydride, maleic anhydride, succinic anhydride, trimellitic anhydride, pyromellitic anhydride, naphthalene-1,4,5,8-tetracarboxylic dianhydride.
- an oligomer having an acid anhydride as a terminal group of a saturated fatty chain skeleton, an unsaturated fatty chain skeleton, or a silicone skeleton or a side chain thereof alone or in combination of two or more thereof, and the above acid anhydride can be used together.
- these acid anhydride curing agents phthalic anhydride, hexahydrophthalic anhydride, 3-methylhexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, tetrahydrophthalic anhydride, 3-methyltetrahydrophthalic anhydride, 4-Methyltetrahydrophthalic anhydride is preferably used.
- the acid anhydride curing agent is preferably a colorless or light yellow acid anhydride curing agent.
- Examples of the isocyanuric acid derivative-based curing agent include 1,3,5-tris (1-carboxymethyl) isocyanurate, 1,3,5-tris (2-carboxyethyl) isocyanurate, 1,3,5, Examples thereof include 5-tris (3-carboxypropyl) isocyanurate and 1,3-bis (2-carboxyethyl) isocyanurate. These may be used alone or in combination of two or more. Furthermore, as the isocyanuric acid derivative-based curing agent, a colorless or light yellow curing agent is preferable.
- the mixing ratio of the epoxy resin and the curing agent is such that the active group (acid anhydride group or carboxy group) capable of reacting with the epoxy group in the curing agent is 0 with respect to 1 equivalent of the epoxy group in the epoxy resin. It is preferably set to be 3 to 1.3 equivalents, more preferably 0.5 to 1.1 equivalents. That is, if there are too few active groups, the curing rate of the thermosetting resin composition will be slow and the glass transition temperature (Tg) of the cured product will tend to be low. If there are too many active groups, the moisture resistance will be low. This is because there is a tendency to decrease.
- the active group acid anhydride group or carboxy group
- epoxy resin curing agents than the above-mentioned acid anhydride curing agent and isocyanuric acid derivative curing agent, for example, phenol curing agent, amine curing agent, and acid Curing agents such as those obtained by partially esterifying an anhydride-based curing agent with alcohol can be used alone or in combination of two or more.
- blending ratio should just follow the mixing
- the silicone resin contains at least a catalyst, and specifically contains a catalyst and a silicone resin.
- the catalyst is, for example, a curing catalyst that accelerates the reaction of the silicone resin to cure the silicone resin, and preferably hydrosilylation that accelerates the hydrosilylation reaction of the silicone resin to be described later and cures the silicone resin by hydrosilylation. It is a catalyst.
- the catalyst contains a transition metal, and examples of the transition metal include white metal elements such as platinum, palladium and rhodium, preferably platinum.
- the catalyst when the catalyst contains platinum, for example, platinum black, platinum chloride, inorganic platinum such as chloroplatinic acid, for example, platinum-olefin complex, platinum-carbonyl complex, platinum-acetyl
- platinum complexes such as acetate, and preferably platinum complexes. More specifically, examples of the platinum complex include a platinum-vinylsiloxane complex, a platinum-tetramethyldivinyldisiloxane complex, a platinum-carbonylcyclovinylmethylsiloxane complex, a platinum-divinyltetramethyldisiloxane complex, and a platinum-cyclovinyl.
- the said catalyst has the aspect mixed with the silicone resin mentioned later, and the aspect contained in a silicone resin as a component which comprises a silicone resin.
- the content (concentration) of the transition metal in the catalyst is preferably 0.1 to 500 ppm, more preferably 0.15 to 100 ppm, and still more preferably 0.2 to 50 ppm, based on the weight of the whole silicone resin. Particularly preferred is 0.3 to 10 ppm.
- the above-mentioned silicone resin is a curable silicone resin that is cured by a reaction accelerated by a catalyst, and examples thereof include a thermosetting silicone resin such as a one-step curable silicone resin and a two-step curable silicone resin.
- the above-mentioned two-stage curable silicone resin has a two-stage reaction mechanism, and heats B-staged (semi-cured) by the first-stage reaction and C-stage (completely cured) by the second-stage reaction. It is a curable silicone resin.
- the B stage is a state between the A stage in which the thermosetting silicone resin is soluble in the solvent and the fully cured C stage, and the curing and gelation progresses slightly, Although it swells but does not completely dissolve, it softens by heating but does not melt.
- the one-step curable silicone resin has a one-step reaction mechanism and is a thermosetting silicone resin that is completely cured by the first-step reaction.
- the one-step curable silicone resin include addition reaction curable polyorganopolysiloxane disclosed in JP2012-124428A.
- the addition reaction curable polyorganopolysiloxane contains, for example, an ethylenically unsaturated hydrocarbon group-containing silicon compound and a hydrosilyl group-containing silicon compound.
- Examples of the ethylenically unsaturated hydrocarbon group-containing silicon compound include vinyl group-containing polyorganosiloxane having two or more vinyl groups in the molecule, preferably vinyl polydimethylsiloxane at both ends.
- hydrosilyl group-containing silicon compound examples include, for example, a hydrosilyl group-containing polyorganosiloxane having two or more hydrosilyl groups in the molecule, preferably both-end hydrosilyl polydimethylsiloxane, both-end trimethylsilyl-blocked methylhydrosiloxane-dimethylsiloxane copolymer, etc. Is given.
- Examples of the two-stage curable silicone resin include a condensation reaction / addition reaction curable silicone resin having two reaction systems of a condensation reaction and an addition reaction.
- Such condensation reaction / addition reaction curable silicone resin contains a catalyst, for example, silanol-terminated polysiloxane, alkenyl group-containing trialkoxysilane, organohydrogenpolysiloxane, condensation catalyst and hydrosilylation catalyst.
- a first condensation reaction / addition reaction curable silicone resin For example, a second condensation containing a silanol group-terminated polysiloxane, an ethylenically unsaturated hydrocarbon group-containing silicon compound, an ethylenically unsaturated hydrocarbon group-containing silicon compound, an organohydrogenpolysiloxane, a condensation catalyst, and a hydrosilylation catalyst Reaction / addition reaction curable silicone resin, For example, a third condensation reaction / addition reaction curable silicone resin containing a silanol type silicone oil at both ends, an alkenyl group-containing dialkoxyalkylsilane, an organohydrogenpolysiloxane, a condensation catalyst and a hydrosilylation catalyst, For example, a fourth condensation reaction containing an organopolysiloxane having at least two alkenylsilyl groups in one molecule, an organopolysiloxane having at least two hydrosilyl groups in one molecule, a hydrosily
- the condensation reaction / addition reaction curable silicone resin is preferably the second condensation reaction / addition reaction curable silicone resin, and specifically described in detail in JP-A No. 2010-265436.
- the second condensation reaction / addition reaction curable silicone resin for example, first, an ethylenically unsaturated hydrocarbon group-containing silicon compound and an ethylenically unsaturated hydrocarbon group which are condensation raw materials are used. It can be prepared by adding the silicon compound and the condensation catalyst all at once, then adding the organohydrogenpolysiloxane as an addition raw material, and then adding a hydrosilylation catalyst (addition catalyst).
- the specific zirconium oxide (B component) used together with the component A includes a 95% cumulative particle size (D95) and 5% cumulative particle size (D5) in the cumulative particle size distribution in the thermosetting resin cured body.
- Zirconium oxide having a ratio (D95 / D5) of 1 to 100 is used.
- Preferred is zirconium oxide having D95 / D5 of 9 to 30, and more preferred is zirconium oxide having D95 / D5 of 10 to 25.
- the effect of the present invention is “high initial light reflectivity even if the reflector is molded so that the thickness of the thinnest portion is 0.2 mm or less, This is because the effect of “being excellent in long-term light resistance and heat discoloration resistance” can be obtained.
- the cumulative particle size distribution is said to be “in the thermosetting resin cured body” because the zirconium oxide particles have a high agglomeration property and are easily converted into secondary particles.
- the accumulated particle size distribution is measured after being dispersed in a thermosetting resin cured body to be primary particles.
- zirconium oxide is added to the thermosetting resin composition, melt-mixed using a kneader or the like, and then cooled, solidified, and pulverized.
- a powdery thermosetting resin composition which is used as a material, molded at 180 ° C. for 90 seconds, and cured at 175 ° C. for 3 hours. In this way, a 1 mm-thick resin molded plate was obtained, and this was used as a sample.
- the sample was fixed on a sample stage, and conductive treatment (platinum palladium was sputtered under the condition of 15 mA ⁇ 10 sec ( Sputtering device: Hitachi E-1030)).
- conductive treatment platinum palladium was sputtered under the condition of 15 mA ⁇ 10 sec ( Sputtering device: Hitachi E-1030)).
- a reflected electron image is observed under an acceleration voltage condition of 5 kV using FE-SEM (manufactured by Hitachi, S-4700).
- the SEM image (10,000 times image) is binarized by an image processing software (Mitani Corporation, Winroof), and the particle size of zirconium oxide particles is measured (elliptical sphere (spherical sphere)) If the particle size is not uniformly determined as in (1), the value of the ellipse major axis is measured as the particle size). Then, a histogram of the number frequency of the particle sizes is created, and the particle size of the number frequency cumulative value of 5% and 95%, that is, the accumulation degree 95% particle size (D95) and the accumulation degree 5% particle size (D5) are read. Based on the value, D95 / D5 is calculated.
- the average particle diameter (D50) of the zirconium oxide as the component (B) in the cured thermosetting resin is preferably 0.01 to 1 ⁇ m, and more preferably D50 is 0.00.
- the average particle size (D50) is a particle size of 50% cumulative measured in the same manner as described above, with a cumulative degree of 95% particle size (D95) and a cumulative degree of 5% particle size (D5). Also called median diameter.
- the particle size may be adjusted by a known method, but wet pulverization is preferable in terms of pulverization efficiency. Moreover, water and an organic solvent (alcohol etc.) are preferable as a medium at the time of wet pulverization, and as a pulverizer used for pulverization, for example, a ball mill, a vibration mill, a medium stirring mill, or the like can be used.
- a pulverizer used for pulverization for example, a ball mill, a vibration mill, a medium stirring mill, or the like can be used.
- the blending ratio of the specific zirconium oxide (component B) is preferably 3 to 50% by volume, more preferably 5 to 30% by volume with respect to the entire thermosetting resin composition. That is, when the content ratio of the B component is too small, there is a tendency that sufficient light reflectivity, particularly excellent initial light reflectivity, cannot be obtained. This is because when the content ratio of the component B is too large, there may be a difficulty in producing a thermosetting resin composition by kneading or the like due to remarkable thickening.
- the thermosetting resin composition of the present invention includes an inorganic filler (excluding zirconium oxide), a curing accelerator, a release agent, and a silane compound, as necessary. Can be blended. Furthermore, various additives such as a modifier (plasticizer), an antioxidant, a flame retardant, a defoaming agent, a leveling agent, and an ultraviolet absorber can be appropriately blended.
- the inorganic filler examples include silica glass powder, talc, silica powder such as fused silica powder and crystalline silica powder, alumina powder, aluminum nitride powder, and silicon nitride powder.
- silica glass powder talc
- silica powder such as fused silica powder and crystalline silica powder
- alumina powder aluminum nitride powder
- silicon nitride powder silicon nitride powder.
- a fused spherical silica powder from the viewpoints of high filling property and high fluidity.
- the inorganic filler excludes zirconium oxide as described above.
- the combination of the particle size of the specific zirconium oxide (component B) and its distribution is a burr when the thermosetting resin composition is formed by transfer molding or the like. It is preferable to consider so as to reduce most.
- the average particle diameter of the inorganic filler is preferably 5 to 100 ⁇ m, particularly preferably 10 to 80 ⁇ m.
- the said average particle diameter can be measured using a laser diffraction scattering type particle size distribution analyzer, for example.
- the kneading may be hindered depending on the case. In that case, the average of zirconium oxide (component B)
- the particle diameter (D50) is preferably 0.15 to 1 ⁇ m.
- the content of the inorganic filler is set so that the total content of the specific zirconium oxide (component B) and the inorganic filler is 10 to 90% by volume of the entire thermosetting resin composition. It is preferable to do. More preferred is 60 to 90% by volume, and particularly preferred is 65 to 85% by volume. That is, if the total content is too small, there is a tendency for problems such as warpage to occur during molding. In addition, if the total content is too large, when kneading the compounding components, a great load is applied to the kneader, and the kneading tends to be impossible. As a result, the thermosetting resin composition that is a molding material It tends to be difficult to fabricate.
- the mixing ratio of the component B and the inorganic filler is out of the above range and the volume ratio is too small, the initial light reflectance of the thermosetting resin composition tends to decrease, and the volume ratio is too large.
- the melt viscosity of the thermosetting resin composition is increased, kneading tends to be difficult.
- the curing accelerator can be used when the thermosetting resin (component A) is an epoxy resin.
- the curing accelerator include 1,8-diaza-bicyclo [5.4.0] undecene- 7, tertiary amines such as triethylenediamine, tri-2,4,6-dimethylaminomethylphenol, N, N-dimethylbenzylamine, N, N-dimethylaminobenzene, N, N-dimethylaminocyclohexane, 2- Imidazoles such as ethyl-4-methylimidazole and 2-methylimidazole, triphenylphosphine, tetraphenylphosphonium tetrafluoroborate, tetraphenylphosphonium tetraphenylborate, tetra-n-butylphosphonium bromide, tetraphenylphosphonium bromide, methyltributylphospho Niu Phosphorus compounds such as dimethyl phosphate, te
- quaternary ammonium salts such as triethylenediammonium / octylcarboxylate, organometallic salts, and derivatives thereof.
- these may be used alone or in combination of two or more.
- tertiary amines, imidazoles, and phosphorus compounds it is particularly preferable to use a phosphorus compound in order to obtain a cured product with little coloring.
- the content of the curing accelerator is preferably set to 0.001 to 8% by weight, more preferably 0.01 to 5% by weight with respect to the thermosetting resin (component A). That is, if the content of the curing accelerator is too small, a sufficient curing acceleration effect may not be obtained, and if the content of the curing accelerator is too large, the resulting cured product tends to be discolored. Because.
- release agents are used as the release agent. Among them, it is preferable to use a release agent having an ether bond.
- a release agent having a structural formula represented by the following general formula (1) Agent for example, a release agent having a structural formula represented by the following general formula (1) Agent.
- Rm and Rn are a hydrogen atom or a monovalent alkyl group, and both may be the same or different. Further, k is a positive number from 1 to 100, and x is a positive number from 1 to 100. ]
- Rm and Rn are a hydrogen atom or a monovalent alkyl group, preferably k is a positive number from 10 to 50, and x is a positive number from 3 to 30. More preferably, Rm and Rn are hydrogen atoms, k is a positive number of 28 to 48, and x is a positive number of 5 to 20. That is, when the value of the number of repetitions k is too small, the releasability is lowered, and when the value of the number of repetitions x is too small, the dispersibility is lowered, so that stable strength and releasability tend not to be obtained. Be looked at.
- the content of the release agent is preferably set in the range of 0.001 to 3% by weight, more preferably in the range of 0.01 to 2% by weight of the entire thermosetting resin composition. That is, if the content of the release agent is too little or too much, the strength of the cured product tends to be insufficient or the release property tends to be lowered.
- silane compound examples include a silane coupling agent and silane.
- silane coupling agent examples include 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and 3-glycidoxypropylmethylethoxysilane.
- silane examples include methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, dimethyldiethylsilane, phenyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, and dezyltrimethoxy.
- silane examples include silane, trifluoropropyltrimethoxysilane, hexamethyldisilazane, and siloxane containing a hydrolyzable group. These may be used alone or in combination of two or more.
- modifier examples include glycols, silicones, alcohols and the like.
- antioxidant examples include phenol compounds, amine compounds, organic sulfur compounds, phosphine compounds, and the like.
- the flame retardant examples include metal hydroxides such as magnesium hydroxide, bromine-based flame retardants, nitrogen-based flame retardants, phosphorus-based flame retardants and the like, and further use a flame retardant aid such as antimony trioxide. You can also.
- defoaming agent examples include conventionally known defoaming agents such as silicone.
- thermosetting resin composition of the present invention can be produced, for example, as follows. That is, the components A and B, an inorganic filler, a curing accelerator and a release agent, and various additives used as necessary are appropriately blended, and then melt-mixed using a kneader or the like. Then, this is cooled, solidified, and pulverized to produce a powdery thermosetting resin composition.
- the cured product obtained by subjecting the obtained thermosetting resin composition to, for example, transfer molding or injection molding preferably has a light reflectance of 80% or more at a wavelength of 450 to 800 nm. More preferably, it is 90% or more. The upper limit is usually 100%. Specifically, the light reflectance at a wavelength of 450 nm of the cured product is preferably 85 to 98%.
- the light reflectance is measured as follows, for example. That is, a cured product of a thermosetting resin composition having a thickness of 0.2 mm is prepared by predetermined curing conditions, for example, 175 ° C. ⁇ 2 minutes, post-curing at 175 ° C.
- the light reflectance of the cured product at a wavelength within the above range at ⁇ 10 ° C. can be measured by using a spectrophotometer (for example, spectrophotometer V-670 manufactured by JASCO Corporation).
- thermosetting resin composition of the present invention is manufactured as follows, for example. That is, a metal lead frame is placed in a mold of a transfer molding machine, and a reflector is formed by transfer molding using the thermosetting resin composition. In this manner, a metal lead frame for an optical semiconductor device in which an annular reflector is formed so as to surround the periphery of the optical semiconductor element mounting region is manufactured. Next, an optical semiconductor element is mounted in the optical semiconductor element mounting region on the metal lead frame inside the reflector, and the optical semiconductor element and the metal lead frame are electrically connected using a bonding wire. And the sealing resin layer is formed by resin-sealing the inner area
- the three-dimensional (cup type) optical semiconductor device shown in FIG. 1 is manufactured.
- the optical semiconductor element 3 is mounted on the second plate portion 2 of the metal lead frame composed of the first plate portion 1 and the second plate portion 2, and the optical semiconductor device
- the reflector 4 for light reflection which consists of a thermosetting resin composition of this invention is formed so that the circumference
- a transparent sealing resin layer 6 for sealing the optical semiconductor element 3 is formed in the recess 5 formed by the metal lead frame and the inner peripheral surface of the reflector 4, a transparent sealing resin layer 6 for sealing the optical semiconductor element 3 is formed.
- the sealing resin layer 6 contains a phosphor as necessary.
- 7 and 8 are bonding wires for electrically connecting the metal lead frame and the optical semiconductor element 3.
- the structure where the thickness of the thinnest location in the said reflector 4 of an optical semiconductor device becomes 0.2 mm or less is made into object.
- various substrates may be used in place of the metal lead frame shown in FIG.
- the various substrates include organic substrates, inorganic substrates, and flexible printed substrates.
- the reflector may be formed by injection molding.
- an optical semiconductor device shown in FIG. 2 and FIG. can give. That is, in this optical semiconductor device, the optical semiconductor elements 3 are respectively mounted at predetermined positions on one surface in the thickness direction of the metal lead frames 10 arranged at intervals, and the gap between the metal lead frames 10 is in accordance with the present invention.
- the light reflection reflector 11 made of a thermosetting resin composition is formed. Also, as shown in FIG. 3, a plurality of reflectors 11 are formed by filling the gap between the metal lead frames 10 with the thermosetting resin composition of the present invention and curing. 2 and 3, reference numeral 12 denotes a bonding wire for electrically connecting the optical semiconductor element 3 and the metal lead frame 10.
- the metal lead frame 10 is placed in a mold of a transfer molding machine, and the gap between the metal lead frames 10 arranged at intervals and the optical semiconductor of the metal lead frame 10 are formed by transfer molding.
- the reflectors 11 are respectively formed by filling the concave portions formed on the surface opposite to the element 3 mounting surface with a thermosetting resin composition and curing.
- the optical semiconductor element 3 is mounted in the optical semiconductor element mounting region at a predetermined position of the metal lead frame 10
- the optical semiconductor element 3 and the metal lead frame 10 are electrically connected using the bonding wire 12.
- the optical semiconductor device shown in FIGS. 2 and 3 is manufactured.
- the structure in which the thickness of the thinnest portion in the reflector 11 of the optical semiconductor device is 0.2 mm or less is targeted.
- thermosetting resin composition each component shown below was prepared prior to preparation of the thermosetting resin composition.
- [silica] Fused spherical silica powder (average particle size 20 ⁇ m) (FB-9454, manufactured by Denki Kagaku Kogyo Co., Ltd.)
- the SEM image (10,000 times image) is binarized by an image processing software (Mitani Corporation, Winroof), and the particle size of zirconium oxide particles is measured (elliptical sphere (spherical sphere))
- the particle size was not uniformly determined as in (1)
- the value of the ellipse major axis was measured as the particle size).
- a histogram of the number frequency of the particle size is created, and the particle size of the number frequency cumulative value of 5%, 50%, and 95%, that is, the accumulation degree 95% particle size (D95), the accumulation degree 50% particle size (D50 ( Average particle diameter)) and 5% cumulative particle size (D5) were read.
- D95 / D5 was calculated based on the value. The results are shown in Table 1 below.
- thermosetting resin compositions of Examples and Comparative Examples thus obtained, various evaluations [initial light reflectance, long-term light resistance, heat discoloration resistance] were measured according to the following methods. The results are shown in Tables 2 and 3 below.
- the example product formed by blending zirconium oxide having a specific particle size distribution as defined in the present invention has a high initial light reflectance even if the molded product is thin, and further, long-term light resistance, Excellent results were also obtained with respect to heat discoloration resistance.
- the comparative example product using zirconium oxide b6 having a particle size distribution deviating from the provisions of the present invention was extremely inferior to the example product, particularly with respect to the initial light reflectance.
- an optical semiconductor (light-emitting) device having the configuration shown in FIG. 1 was manufactured using a tablet-like thermosetting resin composition obtained by tableting the powders of the above-mentioned examples. That is, a metal lead frame having a plurality of pairs of a first plate portion 1 and a second plate portion 2 made of copper (silver plating) is placed in a mold of a transfer molding machine, and the thermosetting resin By performing transfer molding using the composition (conditions: molding at 175 ° C. ⁇ 2 minutes + 175 ° C. ⁇ 3 hours), the reflector 4 (thinnest thickness 0.2 mm) at a predetermined position of the metal lead frame shown in FIG. ) was formed.
- a tablet-like thermosetting resin composition obtained by tableting the powders of the above-mentioned examples. That is, a metal lead frame having a plurality of pairs of a first plate portion 1 and a second plate portion 2 made of copper (silver plating) is placed in a mold of a transfer molding machine
- an optical semiconductor (light emitting) element (size: 0.5 mm ⁇ 0.5 mm) 3 is mounted, and the optical semiconductor element 3 and the metal lead frame are electrically connected by bonding wires 7 and 8.
- a unit including the reflector 4, the metal lead frame, and the optical semiconductor element 3 was manufactured.
- the recess 5 formed by the metal lead frame and the inner peripheral surface of the reflector 4 is filled with silicone resin (manufactured by Shin-Etsu Silicone Co., Ltd., KER-2500) to seal the optical semiconductor element 3 with resin (molding).
- silicone resin manufactured by Shin-Etsu Silicone Co., Ltd., KER-2500
- a transparent sealing resin layer 6 was formed, and each reflector was separated into pieces by dicing to produce the optical semiconductor (light emitting) device shown in FIG.
- the obtained optical semiconductor (light emitting) device was provided with the reflector 4 excellent in long-term light resistance and heat discoloration resistance with a high initial light reflectance, and a good one with high reliability was obtained.
- thermosetting resin composition for an optical semiconductor device of the present invention is useful as a reflector forming material that reflects light emitted from an optical semiconductor element incorporated in the optical semiconductor device.
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Abstract
Description
(A)熱硬化性樹脂。
(B)熱硬化性樹脂硬化体中での、累積粒度分布における累積度95%粒度(D95)と累積度5%粒度(D5)との比(D95/D5)が1~100の、酸化ジルコニウム。
上記熱硬化性樹脂(A成分)としては、例えば、エポキシ樹脂、シリコーン樹脂等があげられる。これらは単独でもしくは併せて用いられる。
例えば、シラノール基両末端ポリシロキサン、エチレン系不飽和炭化水素基含有ケイ素化合物、エチレン系不飽和炭化水素基含有ケイ素化合物、オルガノハイドロジェンポリシロキサン、縮合触媒およびヒドロシリル化触媒を含有する第2の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、両末端シラノール型シリコーンオイル、アルケニル基含有ジアルコキシアルキルシラン、オルガノハイドロジェンポリシロキサン、縮合触媒およびヒドロシリル化触媒を含有する第3の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、1分子中に少なくとも2個のアルケニルシリル基を有するオルガノポリシロキサン、1分子中に少なくとも2個のヒドロシリル基を有するオルガノポリシロキサン、ヒドロシリル化触媒および硬化遅延剤を含有する第4の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、少なくとも2つのエチレン系不飽和炭化水素基と少なくとも2つのヒドロシリル基とを1分子中に併有する第1オルガノポリシロキサン、エチレン系不飽和炭化水素基を含まず、少なくとも2つのヒドロシリル基を1分子中に有する第2オルガノポリシロキサン、ヒドロシリル化触媒およびヒドロシリル化抑制剤を含有する第5の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、少なくとも2つのエチレン系不飽和炭化水素基と少なくとも2つのシラノール基とを1分子中に併有する第1オルガノポリシロキサン、エチレン系不飽和炭化水素基を含まず、少なくとも2つのヒドロシリル基を1分子中に有する第2オルガノポリシロキサン、ヒドロシリル化抑制剤、および、ヒドロシリル化触媒を含有する第6の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、ケイ素化合物、および、ホウ素化合物またはアルミニウム化合物を含有する第7の縮合反応・付加反応硬化型シリコーン樹脂、
例えば、ポリアルミノシロキサンおよびシランカップリング剤を含有する第8の縮合反応・付加反応硬化型シリコーン樹脂等があげられる。
これら縮合反応・付加反応硬化型シリコーン樹脂は、単独でもしくは2種以上併せて用いられる。
上記A成分とともに用いられる特定の酸化ジルコニウム(B成分)としては、熱硬化性樹脂硬化体中での、累積粒度分布における累積度95%粒度(D95)と累積度5%粒度(D5)との比(D95/D5)が1~100の酸化ジルコニウムが用いられる。好ましくは、D95/D5が9~30の酸化ジルコニウムであり、さらに好ましくは、D95/D5が10~25の酸化ジルコニウムである。すなわち、D95/D5を上記範囲に設定することにより、本発明の作用効果である「最薄箇所の厚みが0.2mm以下となるようリフレクタを成形しても高い初期光反射率を示し、さらに長期耐光性および耐加熱変色性に優れるようになる」といった効果が得られるようになるからである。ここで、上記累積粒度分布を「熱硬化性樹脂硬化体中での」としているのは、酸化ジルコニウム粒子が、凝集性が高く二次粒子化しやすい性質のものだからであり、より正確な粒度分布を測定するため、本発明では、熱硬化性樹脂硬化体中に分散させて一次粒子化させてから、その累積粒度分布を測定している。上記累積粒度分布の具体的な測定方法としては、例えば、熱硬化性樹脂組成物中に酸化ジルコニウムを加え、混練機等を用いて溶融混合した後、これを冷却し固化して、粉砕することにより粉末状の熱硬化性樹脂組成物を得、それを材料とし、180℃×90秒で成形後、175℃×3時間キュアする。このようにして、1mm厚の樹脂成形板を得、これを試料とし、樹脂包埋して機械研磨した後、試料台に固定し、導電性処理(15mA×10secの条件で白金パラジウムをスパッタ(スパッタ装置:日立社製E-1030))する。つぎに、FE-SEM(日立社製、S-4700)を用い、反射電子像を5kVの加速電圧条件で観察する。そして、そのSEM画像(1万倍画像)を、画像処理ソフト(MITANI CORPORATION社製、Winroof)により二値化処理し、酸化ジルコニウム粒子の粒径を測定(楕円球状(断面が楕円の球)等のように一律に粒径が定まらない場合には、楕円長軸の値を粒径として測定)する。そして、その粒径の個数頻度のヒストグラムを作成し、5%、95%の個数頻度累積値の粒径、つまり、累積度95%粒度(D95)、累積度5%粒度(D5)を読み取る。その値をもとに、D95/D5を算出する。
粒度の調整は、公知の方法で行ってもよいが、粉砕効率の点で湿式粉砕が好ましい。また、湿式粉砕する際の媒体としては、水、有機溶媒(アルコール等)が好ましく、粉砕に用いる粉砕機としては、例えば、ボールミル、振動ミル、媒体撹拌ミル等を用いることができる。
そして、本発明の熱硬化性樹脂組成物には、上記AおよびB成分以外に、必要に応じて、無機質充填剤(但し、酸化ジルコニウムを除く。)、硬化促進剤、離型剤、シラン化合物を配合することができる。さらには、変性剤(可塑剤)、酸化防止剤、難燃剤、脱泡剤、レベリング剤、紫外線吸収剤等の各種添加剤を適宜配合することができる。
[式(1)中、Rm,Rnは水素原子または一価のアルキル基であり、両者は互いに同じであっても異なっていてもよい。また、kは1~100の正数であり、xは1~100の正数である。]
本発明の熱硬化性樹脂組成物は、例えば、つぎのようにして製造することができる。すなわち、前記AおよびB成分、さらに無機質充填剤、さらには硬化促進剤および離型剤、ならびに必要に応じて用いられる各種添加剤を適宜配合した後、混練機等を用いて溶融混合し、ついで、これを冷却し固化して粉砕することにより粉末状の熱硬化性樹脂組成物を製造することができる。
トリグリシジルイソシアヌレート(TEPIC)(エポキシ当量100)
4-メチルヘキサヒドロ無水フタル酸とヘキサヒドロ無水フタル酸の混合物(酸無水物当量164)(新日本理化社製、リカシッドMH-700)
メチルトリブチルホスホニウムジメチルホスフェート(日本化学工業社製、ヒシコーリンPX-4MP)
第一稀元素化学工業社製、UEP酸化ジルコニウム
第一稀元素化学工業社製、SRP-1酸化ジルコニウム
第一稀元素化学工業製、SPZ酸化ジルコニウム
第一稀元素化学工業製のSPZ酸化ジルコニウムを一般的な湿式ボールミルで粉砕したもの。
第一稀元素化学工業社製、SG酸化ジルコニウム
第一稀元素化学工業社製、DK-3CH酸化ジルコニウム
溶融球状シリカ粉末(平均粒子径20μm)(電気化学工業社製、FB-9454)
まず、熱硬化性樹脂硬化体中での、上記酸化ジルコニウムb1~b6の累積粒度分布をみるため、次のような測定を行った。すなわち、まず、上記の、エポキシ樹脂100重量部と、硬化剤132重量部と、硬化促進剤1重量部とともに、酸化ジルコニウムb1~b6のいずれかを181重量部加え、混練機で溶融混練(温度100~130℃)を行ない、室温(25℃)まで冷却して粉砕することにより粉末状の熱硬化性樹脂組成物を得、それを材料とし、180℃×90秒で成形後、175℃×3時間キュアした。このようにして、1mm厚の樹脂成形板を得、これを試料とし、樹脂包埋して機械研磨した後、試料台に固定し、導電性処理(15mA×10secの条件で白金パラジウムをスパッタ(スパッタ装置:日立社製E-1030))した。つぎに、FE-SEM(日立社製、S-4700)を用い、反射電子像を5kVの加速電圧条件で観察した。そして、そのSEM画像(1万倍画像)を、画像処理ソフト(MITANI CORPORATION社製、Winroof)により二値化処理し、酸化ジルコニウム粒子の粒径を測定(楕円球状(断面が楕円の球)等のように一律に粒径が定まらない場合には、楕円長軸の値を粒径として測定)した。そして、その粒径の個数頻度のヒストグラムを作成し、5%、50%、95%の個数頻度累積値の粒径、つまり、累積度95%粒度(D95)、累積度50%粒度(D50(平均粒子径))、累積度5%粒度(D5)を読み取った。さらに、その値をもとに、D95/D5を算出した。その結果を、下記の表1に示す。
上記各熱硬化性樹脂組成物を用い、厚み0.2mmの試験片を所定の硬化条件(条件:175℃×2分間の成形+175℃×3時間キュア)にて作製し、この試験片(硬化物)を用いて、室温(25℃)での光反射率を測定した。なお、測定装置として日本分光社製の分光光度計V-670を使用して、波長450nmの光反射率を室温(25℃)にて測定した。なお、判定では、光反射率が90%以上のものを「○」、95%以上のものを「◎」と評価し、90%未満のものを「×」と評価した。
上記と同様にして作製した各試験片を用い、波長600nmの光反射率を室温(25℃)にて測定した。その後、その試験片を110℃のホットプレートで加熱した状態で、強度1W/cm2の高圧水銀灯の光を、g線(436nm)バンドパスフィルターを通して15分間照射した後に、上記と同様にして波長600nmの光反射率を測定した(加速試験)。そして、上記加速試験前後での光反射率の低下度(光照射後の光反射率-光照射前の光反射率)を算出した。なお、測定には、上記と同様、日本分光社製の分光光度計V-670を使用した。
上記と同様にして作製した各試験片を用い、200℃×20時間加熱し、波長450nmの光反射率を測定した。なお、測定には、上記と同様、日本分光社製の分光光度計V-670を使用した。
つぎに、上記実施例品である粉末を打錠したタブレット状の熱硬化性樹脂組成物を用いて、図1に示す構成の光半導体(発光)装置を製造した。すなわち、銅(銀メッキ)製の複数の対となった第1のプレート部1と第2のプレート部2を有する金属リードフレームをトランスファー成形機の金型内に設置し、上記熱硬化性樹脂組成物を用いてトランスファー成形(条件:175℃×2分間の成形+175℃×3時間キュア)を行なうことにより、図1に示す、金属リードフレームの所定位置にリフレクタ4(最薄厚み0.2mm)を形成した。ついで、光半導体(発光)素子(大きさ:0.5mm×0.5mm)3を搭載し、この光半導体素子3と上記金属リードフレームをボンディングワイヤー7,8にて電気的に接続することにより、リフレクタ4と、金属リードフレームと、光半導体素子3とを備えたユニットを製造した。
2 第2のプレート部
3 光半導体素子
4,11 リフレクタ
5 凹部
6 封止樹脂層
7,8,12 ボンディングワイヤー
10 金属リードフレーム
Claims (10)
- 最薄箇所の厚みが0.2mm以下である、光半導体装置のリフレクタの形成材料であって、下記の(A)および(B)成分を含有することを特徴とする光半導体装置用熱硬化性樹脂組成物。
(A)熱硬化性樹脂。
(B)熱硬化性樹脂硬化体中での、累積粒度分布における累積度95%粒度(D95)と累積度5%粒度(D5)との比(D95/D5)が1~100の、酸化ジルコニウム。 - 熱硬化性樹脂硬化体中での、上記(B)成分の酸化ジルコニウムの平均粒子径(D50)が0.01~1μmである、請求項1記載の光半導体装置用熱硬化性樹脂組成物。
- さらに無機質充填剤を含有する、請求項1または2記載の光半導体装置用熱硬化性樹脂組成物。
- 厚み方向の片面のみに光半導体素子を搭載するための板状の光半導体装置用リードフレームであって、互いに隙間を隔てて配置される複数のプレート部を備えるとともに、上記隙間に、請求項1~3のいずれか一項に記載の光半導体装置用熱硬化性樹脂組成物を用いて充填し、硬化してなるリフレクタが形成されてなることを特徴とする光半導体装置用リードフレーム。
- 光半導体素子搭載領域を備え、それ自体の少なくとも一部で素子搭載領域の周囲を囲んだ状態でリフレクタが形成されてなる立体状の光半導体装置用リードフレームであって、上記リフレクタが、請求項1~3のいずれか一項に記載の光半導体装置用熱硬化性樹脂組成物を用いて形成されてなることを特徴とする光半導体装置用リードフレーム。
- 上記リフレクタが、リードフレームの片面にのみ形成されている請求項5記載の光半導体装置用リードフレーム。
- 上記リフレクタがトランスファー成形または射出成形により光半導体装置用リードフレームに形成されてなる請求項4~6のいずれか一項に記載の光半導体装置用リードフレーム。
- その片面に光半導体素子を搭載するための素子搭載領域を有するプレート部が、互いに隙間を隔てて配置され、上記素子搭載領域の所定位置に光半導体素子が搭載されてなる光半導体装置であって、上記隙間に、請求項1~3のいずれか一項に記載の光半導体装置用熱硬化性樹脂組成物を用いて充填し、硬化してなるリフレクタが形成されてなることを特徴とする光半導体装置。
- 光半導体素子搭載領域を備え、それ自体の少なくとも一部で素子搭載領域の周囲を囲んだ状態でリフレクタが形成されてなる光半導体装置用リードフレームの所定位置に光半導体素子が搭載されてなる光半導体装置であって、上記リフレクタが、請求項1~3のいずれか一項に記載の光半導体装置用熱硬化性樹脂組成物を用いて形成されてなることを特徴とする光半導体装置。
- リフレクタで囲まれた光半導体素子を含む領域をシリコーン樹脂にて樹脂封止されてなる請求項9記載の光半導体装置。
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