WO2014156925A1 - 電子デバイス封止用樹脂シート及び電子デバイスパッケージの製造方法 - Google Patents
電子デバイス封止用樹脂シート及び電子デバイスパッケージの製造方法 Download PDFInfo
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- WO2014156925A1 WO2014156925A1 PCT/JP2014/057686 JP2014057686W WO2014156925A1 WO 2014156925 A1 WO2014156925 A1 WO 2014156925A1 JP 2014057686 W JP2014057686 W JP 2014057686W WO 2014156925 A1 WO2014156925 A1 WO 2014156925A1
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- 230000001376 precipitating effect Effects 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon 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
- 239000007787 solid Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- USFPINLPPFWTJW-UHFFFAOYSA-N tetraphenylphosphonium Chemical compound C1=CC=CC=C1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 USFPINLPPFWTJW-UHFFFAOYSA-N 0.000 description 1
- AYEKOFBPNLCAJY-UHFFFAOYSA-O thiamine pyrophosphate Chemical compound CC1=C(CCOP(O)(=O)OP(O)(O)=O)SC=[N+]1CC1=CN=C(C)N=C1N AYEKOFBPNLCAJY-UHFFFAOYSA-O 0.000 description 1
- CVNKFOIOZXAFBO-UHFFFAOYSA-J tin(4+);tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Sn+4] CVNKFOIOZXAFBO-UHFFFAOYSA-J 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-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
- QLAGHGSFXJZWKY-UHFFFAOYSA-N triphenylborane;triphenylphosphane Chemical compound C1=CC=CC=C1B(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 QLAGHGSFXJZWKY-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
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- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
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- C08G59/24—Di-epoxy compounds carbocyclic
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- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
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- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
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- 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
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- H01L24/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- 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
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- H01L2224/97—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips the devices being connected to a common substrate, e.g. interposer, said common substrate being separable into individual assemblies after connecting
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—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
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/15—Structure, shape, material or disposition of the bump connectors after the connecting process
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- 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
- H01L2924/14—Integrated circuits
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- 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
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/156—Material
- H01L2924/15786—Material with a principal constituent of the material being a non metallic, non metalloid inorganic material
- H01L2924/15787—Ceramics, e.g. crystalline carbides, nitrides or oxides
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- the present invention relates to an electronic device sealing resin sheet and an electronic device package manufacturing method.
- an electronic device package typically, one or a plurality of electronic devices fixed to a substrate or the like are sealed with a sealing resin, and the sealing body is packaged in units of electronic devices as necessary. The procedure of dicing is adopted.
- Such a sealing resin is usually stored refrigerated or frozen. This is because if it is stored at room temperature, the curing reaction gradually proceeds and the quality deteriorates. However, from the viewpoint of improving workability and the like, improvement in storage stability at room temperature is required.
- Patent Document 1 describes that a resin sheet is formed by kneading an epoxy resin, an inorganic filler, a curing accelerator, and the like to prepare a kneaded material, and then plastically processing the kneaded material.
- a part of the curing accelerator may be activated due to the temperature rise of the kneaded product during kneading. Once the curing accelerator is activated, the curing accelerator becomes a reaction starting point and the curing reaction gradually proceeds even at room temperature, so that the room temperature storage stability of the resin sheet is lowered.
- Patent Document 2 it is described that a resin sheet is formed by applying a varnish containing a solvent, an epoxy resin, a curing accelerator and the like onto a film and then drying the coating film.
- the resin sheet manufacturing method (solvent coating) of Patent Document 2 since the curing accelerator is well compatible with the epoxy resin or the like, the curing accelerator is easily reacted and a part of the curing accelerator is activated. There is.
- the object of the present invention is to solve the above-mentioned problems and provide a resin sheet having excellent room temperature storage stability.
- the present invention relates to an electronic device sealing resin sheet having an exothermic start temperature measured by a differential scanning calorimeter of 120 ° C. or higher and an exothermic peak temperature of 150 to 200 ° C.
- the resin sheet for encapsulating an electronic device of the present invention satisfies such characteristics, the curing reaction does not substantially proceed at room temperature. Therefore, it is excellent in storage stability at room temperature.
- the area in the temperature range of exothermic peak temperature ⁇ 30 ° C. is preferably 70% or more with respect to the entire exothermic peak area. Since it is 70% or more, the DSC curve forms a sharp exothermic peak in a high temperature region. That is, the curing reaction does not substantially proceed at room temperature, and the storage stability at room temperature is excellent.
- the minimum melt viscosity after storage for 4 weeks at 25 ° C. is not more than twice the minimum melt viscosity before storage. Since it is 2 times or less, the curing reaction at room temperature is well suppressed and the storage stability at room temperature is excellent.
- the content of the filler in the resin sheet for sealing an electronic device is 70 to 90% by volume.
- the electronic device sealing resin sheet is preferably obtained by plastically processing a kneaded product obtained by kneading an epoxy resin, a phenol resin, a thermoplastic resin, a filler, and a curing accelerator into a sheet shape.
- the curing accelerator is hardly compatible with an epoxy resin and the like, and the curing accelerator is relatively difficult to react, so that the storage stability at normal temperature can be improved.
- the curing accelerator is an imidazole curing accelerator.
- the imidazole curing accelerator is preferably a latent curing accelerator.
- the present invention also provides a sealing step in which the electronic device sealing resin sheet is laminated on the electronic device so as to cover one or more electronic devices, and the electronic device sealing resin sheet is cured.
- the present invention relates to a method for manufacturing an electronic device package, which includes a sealing body forming step of forming.
- FIG. 1 is a cross-sectional view schematically showing a resin sheet 11 according to an embodiment of the present invention.
- the resin sheet 11 is typically provided in a state of being laminated on a support 11a such as a polyethylene terephthalate (PET) film. Note that a release treatment may be performed on the support 11a in order to easily peel off the resin sheet 11.
- PET polyethylene terephthalate
- the resin sheet 11 has an exothermic start temperature measured by a differential scanning calorimeter (DSC) of 120 ° C. or higher and an exothermic peak temperature of 150 to 200 ° C.
- DSC differential scanning calorimeter
- the resin sheet 11 is excellent in normal temperature storage stability.
- the upper limit of the heat generation start temperature is not particularly limited, but is, for example, 170 ° C. or less from the viewpoint of manufacturing cost and manufacturing efficiency of the resin sheet.
- the exothermic peak temperature is preferably 160 ° C or higher, and preferably 190 ° C or lower.
- the exothermic start temperature and the exothermic peak temperature can be measured by the methods described in the examples.
- the exothermic start temperature and exothermic peak temperature can be controlled by the type of curing accelerator.
- the area in the temperature range of the exothermic peak temperature ⁇ 30 ° C. is preferably 70% or more, more preferably 80% or more with respect to the entire exothermic peak area. preferable.
- the DSC curve forms a sharp exothermic peak in a high temperature range. That is, the curing reaction does not substantially proceed at normal temperature, and the normal temperature storage stability of the resin sheet 11 is excellent.
- the minimum melt viscosity after storage for 4 weeks at 25 ° C. is preferably 2 times or less, more preferably 1.5 times or less than the minimum melt viscosity before storage. When it is 2 times or less, the curing reaction at room temperature is well suppressed, and the storage stability at room temperature is excellent. In addition, minimum melt viscosity can be measured by the method as described in an Example.
- the minimum melt viscosity before storage is not particularly limited, but is usually 20 to 20000 Pa ⁇ s, preferably 3000 to 10,000 Pa ⁇ s.
- the method for producing the resin sheet 11 is not particularly limited, but a method of plastically processing a kneaded product obtained by kneading an epoxy resin, a phenol resin, a thermoplastic resin, a filler, and a curing accelerator into a sheet shape is preferable.
- the curing accelerator is hardly compatible with an epoxy resin and the like, and the curing accelerator is relatively difficult to react, so that the storage stability at normal temperature can be improved.
- a kneaded material is prepared by melting and kneading an epoxy resin, a phenol resin, a thermoplastic resin, a filler, and a curing accelerator with a known kneader such as a mixing roll, a pressure kneader, or an extruder.
- the kneaded material is plastically processed into a sheet shape.
- the upper limit of the temperature is preferably 140 ° C. or less, and more preferably 130 ° C. or less. Since it is 140 degrees C or less, activation of the hardening accelerator in the resin sheet preparation process can be suppressed, and favorable normal temperature storage property is obtained.
- the lower limit of the temperature is preferably equal to or higher than the softening point of each component described above, for example, 30 ° C or higher, and preferably 50 ° C or higher.
- the epoxy resin is not particularly limited.
- triphenylmethane type epoxy resin, cresol novolac type epoxy resin, biphenyl type epoxy resin, modified bisphenol A type epoxy resin, bisphenol A type epoxy resin, bisphenol F type epoxy resin, modified bisphenol F type epoxy resin, dicyclopentadiene type Various epoxy resins such as an epoxy resin, a phenol novolac type epoxy resin, and a phenoxy resin can be used. These epoxy resins may be used alone or in combination of two or more.
- the epoxy equivalent is 150 to 250 and the softening point or the melting point is 50 to 130 ° C., solid at room temperature. From the viewpoint, triphenylmethane type epoxy resin, cresol novolac type epoxy resin, and biphenyl type epoxy resin are more preferable.
- the phenol resin is not particularly limited as long as it causes a curing reaction with the epoxy resin.
- a phenol novolac resin, a phenol aralkyl resin, a biphenyl aralkyl resin, a dicyclopentadiene type phenol resin, a cresol novolak resin, a resole resin, or the like is used.
- These phenolic resins may be used alone or in combination of two or more.
- phenolic resin those having a hydroxyl equivalent weight of 70 to 250 and a softening point of 50 to 110 ° C. are preferably used from the viewpoint of reactivity with the epoxy resin, and in particular, phenol novolak from the viewpoint of high curing reactivity. Resin can be used suitably. From the viewpoint of reliability, low hygroscopic materials such as phenol aralkyl resins and biphenyl aralkyl resins can also be suitably used.
- Thermoplastic resins include natural rubber, butyl rubber, isoprene rubber, chloroprene rubber, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-acrylic acid ester copolymer, polybutadiene resin, polycarbonate resin, thermoplasticity.
- thermoplastic resins can be used alone or in combination of two or more.
- a styrene-isobutylene-styrene block copolymer is preferred from the viewpoint of low stress and low water absorption.
- MBS resin is preferred because it has low friction with epoxy resin, phenol resin, etc. and can be kneaded under mild temperature conditions (relatively low temperature conditions).
- the average particle diameter of the thermoplastic resin is not particularly limited, but it is preferable to use a relatively small one, for example, 5 to 500 ⁇ m, and preferably 50 to 200 ⁇ m. Thereby, it can knead
- the average particle diameter can be derived, for example, by using a sample arbitrarily extracted from the population and measuring it using a laser diffraction / scattering particle size distribution measuring apparatus.
- an inorganic filler is preferable.
- the inorganic filler include quartz glass, talc, silica (such as fused silica and crystalline silica), alumina, aluminum nitride, silicon nitride, and boron nitride.
- silica and alumina are preferable, and silica is more preferable because the linear expansion coefficient can be satisfactorily reduced.
- Silica is preferably fused silica and more preferably spherical fused silica because it is excellent in fluidity.
- the average particle size of the filler is preferably 1 ⁇ m or more, more preferably 5 ⁇ m or more. When it is 1 ⁇ m or more, it is easy to obtain flexibility and flexibility of the resin sheet.
- the average particle size of the filler is preferably 40 ⁇ m or less, more preferably 30 ⁇ m or less. When it is 40 ⁇ m or less, it is easy to increase the filling rate of the filler.
- the average particle diameter can be derived, for example, by using a sample arbitrarily extracted from the population and measuring it using a laser diffraction / scattering particle size distribution measuring apparatus.
- the filler is preferably treated (pretreated) with a silane coupling agent. Thereby, wettability with resin can be improved and kneading can be performed under a mild temperature condition (relatively low temperature condition).
- the silane coupling agent is a compound having a hydrolyzable group and an organic functional group in the molecule.
- hydrolyzable group examples include an alkoxy group having 1 to 6 carbon atoms such as a methoxy group and an ethoxy group, an acetoxy group, and a 2-methoxyethoxy group.
- a methoxy group is preferable because it easily removes volatile components such as alcohol generated by hydrolysis.
- organic functional group examples include vinyl group, epoxy group, styryl group, methacryl group, acrylic group, amino group, ureido group, mercapto group, sulfide group, and isocyanate group.
- an epoxy group is preferable because it easily reacts with an epoxy resin or a phenol resin.
- silane coupling agent examples include vinyl group-containing silane coupling agents such as vinyltrimethoxysilane and vinyltriethoxysilane; 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyl Epoxy group-containing silane coupling agents such as dimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane; p-styryltrimethoxysilane, etc.
- vinyl group-containing silane coupling agents such as vinyltrimethoxysilane and vinyltriethoxysilane
- 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane 3-glycidoxypropylmethyl Epoxy group-containing silane coupling agents such as dimethoxysilane, 3-glycidoxypropyl
- Styryl group-containing silane coupling agent 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltri Methacrylic group-containing silane coupling agents such as toxisilane; Acrylic group-containing silane coupling agents such as 3-acryloxypropyltrimethoxysilane; N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, N-2- (Aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N Amino group-containing silane coupling agents such as phenyl-3-a
- the method for treating the filler with the silane coupling agent is not particularly limited, and examples include a wet method in which the filler and the silane coupling agent are mixed in a solvent, and a dry method in which the filler and the silane coupling agent are treated in a gas phase. It is done.
- the treatment amount of the silane coupling agent is not particularly limited, but it is preferable to treat 0.1 to 1 part by weight of the silane coupling agent with respect to 100 parts by weight of the untreated filler.
- the curing accelerator is not particularly limited as long as it can cure the epoxy resin and the phenol resin.
- tetraphenylphosphonium tetraphenylborate (trade name: TPP-K), tetraphenylphosphonium tetra-p-triborate. (Product name: TPP-MK), and a phosphorus-boron curing accelerator such as triphenylphosphine triphenylborane (trade name: TPP-S) (all manufactured by Hokuko Chemical Co., Ltd.).
- 2-methylimidazole (trade name; 2MZ), 2-undecylimidazole (trade name; C11-Z), 2-heptadecylimidazole (trade name; C17Z), 1,2-dimethylimidazole (trade name; 1 .2DMZ), 2-ethyl-4-methylimidazole (trade name; 2E4MZ), 2-phenylimidazole (trade name; 2PZ), 2-phenyl-4-methylimidazole (trade name; 2P4MZ), 1-benzyl-2 -Methylimidazole (trade name; 1B2MZ), 1-benzyl-2-phenylimidazole (trade name; 1B2PZ), 1-cyanoethyl-2-methylimidazole (trade name; 2MZ-CN), 1-cyanoethyl-2-undecyl Imidazole (trade name; C11Z-CN), 1-cyanoethyl-2-phenylimidazoli Mutrimer
- an inclusion complex composed of 5-nitroisophthalic acid and an imidazole compound represented by the formula (1) an inclusion complex composed of 5-nitroisophthalic acid and an imidazole compound represented by the formula (2)
- inclusion complexes comprising 5-nitroisophthalic acid and an imidazole compound represented by the formula (3).
- the inclusion complex refers to a complex produced by incorporating (incorporating) a guest compound (imidazole compound represented by the formulas (1) to (3)) into a host compound (5-nitroisophthalic acid).
- a host compound is a compound formed by bonding with a guest compound by intermolecular force that is a bond other than a covalent bond (other than a chemical bond), and an inclusion lattice is formed in such a compound.
- the inclusion lattice means that host compounds are bonded to each other by bonds other than covalent bonds, and the guest compound is bonded to a space (gap) of two or more molecules of the bonded host compounds by bonds other than covalent bonds (intermolecular force).
- the host compound, 5-nitroisophthalic acid, and the guest compound, the imidazole compounds represented by formulas (1) to (3), are not subjected to chemical bonds but physical forces such as intermolecular forces. Is included. For this reason, these inclusion complexes do not act as curing accelerators at room temperature, but are activated as curing accelerators when they are not included at high temperatures.
- An inclusion complex can be prepared, for example, as follows. That is, after adding at least one selected from the group consisting of 5-nitroisophthalic acid and an imidazole compound represented by formulas (1) to (3) to a solvent, the mixture is subjected to heat treatment or heat reflux treatment with appropriate stirring. And can be prepared by precipitating the desired inclusion complex.
- 5-nitroisophthalic acid and the imidazole compounds represented by the formulas (1) to (3) are separately dissolved in the solvent, and then these dissolved solutions are mixed with each other.
- the solvent that can be used include water, methanol, ethanol, ethyl acetate, methyl acetate, diethyl ether, dimethyl ether, acetone, methyl ethyl ketone, and acetonitrile.
- the addition ratio of 5-nitroisophthalic acid and the imidazole compound represented by formulas (1) to (3) is, for example, to 1 mol of 5-nitroisophthalic acid (host compound).
- the imidazole compound (guest compound) represented by the formulas (1) to (3) is preferably set to a ratio of 0.1 to 5.0 mol, and set to a ratio of 0.5 to 3.0 mol. It is more preferable.
- the heating conditions for producing the inclusion complex may be in the temperature range where the desired inclusion complex is obtained. For example, heating is preferably performed in the range of 40 to 120 ° C, and heating is performed in the range of 50 to 90 ° C. More preferably.
- Heating in the production of the inclusion complex is preferably performed while stirring a solution or suspension containing 5-nitroisophthalic acid and an imidazole compound represented by formulas (1) to (3). More preferably.
- the solution or suspension is allowed to stand overnight at room temperature to precipitate the inclusion complex, and then filtered and dried to obtain the target inclusion complex.
- latent curing accelerators are preferred because they are difficult to activate even at kneading temperatures.
- 2-phenyl-4,5-dihydroxymethylimidazole, 5-nitroisophthalic acid and formula (1) An inclusion complex composed of an imidazole compound represented by formula (5), an inclusion complex composed of 5-nitroisophthalic acid and an imidazole compound represented by formula (2), and an imidazole compound represented by formula (3) and 5-nitroisophthalic acid Inclusion complexes are more preferred.
- a flame retardant component a pigment, a silane coupling agent, and the like together with an epoxy resin, a phenol resin, a thermoplastic resin, a filler, and a curing accelerator.
- various metal hydroxides such as aluminum hydroxide, magnesium hydroxide, iron hydroxide, calcium hydroxide, tin hydroxide, complex metal hydroxide, phosphazene compounds, and the like can be used.
- phosphazene compounds are preferred because they are excellent in flame retardancy and strength after curing.
- the pigment is not particularly limited, and examples thereof include carbon black.
- the kneading time is preferably 1 minute or more, more preferably 5 minutes or more.
- the kneading time is preferably 30 minutes or less, more preferably 15 minutes or less.
- the kneading is preferably performed under reduced pressure conditions (under reduced pressure atmosphere).
- the pressure under reduced pressure is preferably 0.1 kg / cm 2 or less, more preferably 0.05 kg / cm 2 or less.
- the lower limit of the pressure under reduced pressure is not particularly limited, but is, for example, 1 ⁇ 10 ⁇ 4 kg / cm 2 or more.
- the kneaded material after melt-kneading is preferably subjected to plastic working in a high temperature state without cooling.
- the plastic working method is not particularly limited, and examples thereof include a flat plate pressing method, a T die extrusion method, a screw die extrusion method, a roll rolling method, a roll kneading method, an inflation extrusion method, a coextrusion method, and a calendering method.
- the plastic working temperature is preferably not less than the softening point of each component described above, and is 40 to 150 ° C., preferably 50 to 140 ° C., more preferably 70 to 120 ° C. in consideration of the thermosetting property and moldability of the epoxy resin. is there.
- the thickness of the resin sheet 11 is not particularly limited, but is preferably 100 ⁇ m or more, more preferably 150 ⁇ m or more. Further, the thickness of the resin sheet 11 is preferably 2000 ⁇ m or less, more preferably 1000 ⁇ m or less. An electronic device can be favorably sealed as it is in the said range.
- the resin sheet 11 may have a single-layer structure or a multilayer structure in which two or more resin sheets are laminated, but there is no risk of delamination and the sheet thickness is highly uniform.
- a single layer structure is preferred.
- the total content of the epoxy resin and the phenol resin in the resin sheet 11 is preferably 2.0% by weight or more, and more preferably 3.0% by weight or more. Adhesive force with respect to an electronic device, a board
- the total content of the epoxy resin and the phenol resin in the resin sheet 11 is preferably 20% by weight or less, and more preferably 10% by weight or less. If it is 20% by weight or less, the hygroscopicity can be kept low.
- the blending ratio of the epoxy resin and the phenol resin is blended so that the total of hydroxyl groups in the phenol resin is 0.7 to 1.5 equivalents with respect to 1 equivalent of the epoxy group in the epoxy resin from the viewpoint of curing reactivity. It is preferable to use 0.9 to 1.2 equivalents.
- the content of the thermoplastic resin in the resin sheet 11 is preferably 1.0% by weight or more, and more preferably 1.5% by weight or more. When it is 1.0% by weight or more, kneading can be performed under mild temperature conditions (relatively low temperature conditions).
- the content of the thermoplastic resin in the resin sheet 11 is preferably 3.5% by weight or less, and more preferably 3% by weight or less. Adhesive force with respect to an electronic device, a board
- the content of the filler in the resin sheet 11 is preferably 70% by volume or more, and more preferably 74% by volume or more.
- a linear expansion coefficient can be designed low as it is 70 volume% or more.
- the filler content is preferably 90% by volume or less, more preferably 85% by volume or less.
- liquidity, and adhesiveness are favorably obtained as it is 90 volume% or less.
- the filler content can also be explained by using “% by weight” as a unit. Typically, the content of silica will be described in units of “% by weight”. Since silica usually has a specific gravity of 2.2 g / cm 3 , the preferred range of the silica content (% by weight) is, for example, as follows. That is, the content of silica in the resin sheet 11 is preferably 81% by weight or more, and more preferably 84% by weight or more. 94 weight% or less is preferable and, as for content of the silica in the resin sheet 11, 91 weight% or less is more preferable.
- the preferred range of the alumina content is, for example, as follows. That is, the content of alumina in the resin sheet 11 is preferably 88% by weight or more, and more preferably 90% by weight or more. 97 weight% or less is preferable and, as for content of the alumina in the resin sheet 11, 95 weight% or less is more preferable.
- the content of the curing accelerator is preferably 0.1 parts by weight or more, more preferably 1 part by weight or more, and further preferably 3 parts by weight or more with respect to a total of 100 parts by weight of the epoxy resin and the phenol resin. When it is 0.1 parts by weight or more, curing is completed within a practical time. Further, the content of the curing accelerator is preferably 15 parts by weight or less, more preferably 10 parts by weight or less, and still more preferably 8 parts by weight or less. The intensity
- cured material is favorable in it being 15 weight part or less.
- the content of the flame retardant component is preferably 10% by weight or more, more preferably 15% by weight or more, in 100% by weight of the organic component (all components excluding the filler).
- a flame retardance is favorably acquired as it is 10 weight% or more.
- the content of the flame retardant component is preferably 30% by weight or less, and more preferably 25% by weight or less. When the content is 30% by weight or less, there is a tendency that there is little decrease in physical properties of the cured product (specifically, physical properties such as glass transition temperature and high-temperature resin strength).
- the content of the pigment in the resin sheet 11 is preferably 0.1 to 2% by weight.
- the resin sheet 11 is a SAW (Surface Acoustic Wave) filter; a MEMS (Micro Electro Mechanical Systems) such as a pressure sensor and a vibration sensor; an IC (integrated circuit) such as an LSI; a semiconductor such as a transistor; a capacitor; an electronic device such as a resistor Used for sealing.
- SAW Surface Acoustic Wave
- MEMS Micro Electro Mechanical Systems
- IC integrated circuit
- semiconductor such as a transistor
- a capacitor an electronic device such as a resistor Used for sealing.
- it can use suitably for the sealing of the electronic device (specifically SAW filter, MEMS) which needs hollow sealing, and can use it especially suitably for sealing of a SAW filter.
- the sealing method is not particularly limited, and examples thereof include a method in which an uncured resin sheet 11 is laminated on a substrate so as to cover an electronic device on the substrate, and then the resin sheet 11 is cured and sealed. . It does not specifically limit as a board
- substrate For example, a printed wiring board, a ceramic substrate, a silicon substrate, a metal substrate etc. are mentioned.
- FIGS. 2A to 2C are diagrams each schematically showing one step of a method for manufacturing an electronic device package according to an embodiment of the present invention.
- the SAW filter 13 mounted on the printed wiring board 12 is hollow-sealed with the resin sheet 11 to produce an electronic device package.
- a printed wiring board 12 on which a plurality of SAW filters 13 are mounted is prepared (see FIG. 2A).
- the SAW filter 13 can be formed by dicing a piezoelectric crystal on which predetermined comb-shaped electrodes are formed by a known method.
- a known device such as a flip chip bonder or a die bonder can be used.
- the SAW filter 13 and the printed wiring board 12 are electrically connected via protruding electrodes 13a such as bumps.
- a hollow portion 14 is maintained between the SAW filter 13 and the printed wiring board 12 so as not to inhibit the propagation of surface acoustic waves on the surface of the SAW filter.
- the distance between the SAW filter 13 and the printed wiring board 12 can be set as appropriate, and is generally about 15 to 50 ⁇ m.
- the resin sheet 11 is laminated on the printed wiring board 12 so as to cover the SAW filter 13, and the SAW filter 13 is resin-sealed with the resin sheet 11 (see FIG. 2B).
- the resin sheet 11 functions as a sealing resin for protecting the SAW filter 13 and its accompanying elements from the external environment.
- the method of laminating the resin sheet 11 on the printed wiring board 12 is not particularly limited, and can be performed by a known method such as hot press or laminator.
- hot press conditions the temperature is, for example, 40 to 100 ° C., preferably 50 to 90 ° C.
- the pressure is, for example, 0.1 to 10 MPa, preferably 0.5 to 8 MPa
- the time is, for example, 0.3 to 10 minutes, preferably 0.5 to 5 minutes.
- it is preferable to press under reduced pressure conditions for example, 0.1 to 5 kPa).
- sealing body forming process In the sealing body forming step, the resin sheet 11 is thermally cured to form the sealing body 15 (see FIG. 2B).
- the heating temperature is preferably 100 ° C or higher, more preferably 120 ° C or higher.
- the upper limit of the heating temperature is preferably 200 ° C. or lower, more preferably 180 ° C. or lower.
- the heating time is preferably 10 minutes or more, more preferably 30 minutes or more.
- the upper limit of the heating time is preferably 180 minutes or less, more preferably 120 minutes or less.
- you may pressurize as needed Preferably it is 0.1 Mpa or more, More preferably, it is 0.5 Mpa or more.
- the upper limit is preferably 10 MPa or less, more preferably 5 MPa or less.
- a substrate mounting step can be performed in which rewiring and bumps are formed on the electronic device package 18 and mounted on a separate substrate (not shown).
- a known apparatus such as a flip chip bonder or a die bonder can be used.
- Epoxy resin YSLV-80XY manufactured by Nippon Steel Chemical Co., Ltd. (bisphenol F type epoxy resin, epkin equivalent 200 g / eq. Softening point 80 ° C.)
- Phenol resin MEH-7785-SS (Maywa Kasei Co., Ltd.) (phenol resin having a biphenylaralkyl skeleton, hydroxyl group equivalent 203 g / eq. Softening point 67 ° C.)
- Thermoplastic resin Metablene C-132E manufactured by Mitsubishi Rayon Co., Ltd.
- Curing accelerator 2 inclusion complex consisting of 5-nitroisophthalic acid and 2-ethyl-4-methylimidazole represented by formula (1)
- Curing accelerator 3 inclusion complex: 5-nitroisophthalic acid and Inclusion complex comprising 2-phenyl-4,5-dihydroxymethylimidazole represented by formula (2)
- Curing accelerator 4 inclusion complex: 5-nitroisophthalic acid and 2-phenyl- represented by formula (3)
- Inclusion complex consisting of 4-methyl-5-hydroxymethylimidazole
- Curing accelerator 5 TPP (Triphenyl Horse Fin) manufactured by Hokuko Chemical Co., Ltd.
- Curing accelerator 6 2E4MZ (2-ethyl-4-methylimidazole) manufactured by Shikoku Kasei Kogyo Co., Ltd.
- the minimum melt viscosity of the resin sheet was measured using a dynamic viscoelasticity measurement apparatus (TA Instruments, ARES) (measurement conditions: gap 1 mm, parallel plate diameter 8 mm, measurement frequency 0.1 Hz, 50 ° C. to 150 ° C. Temperature rise measurement at 10 ° C./min to ° C.)
- the resin sheet of Examples 1 to 5 having an exotherm starting temperature of 120 ° C. or higher and an exothermic peak temperature of 150 to 200 ° C. had a small change in minimum melt viscosity before and after storage at room temperature and was excellent in room temperature storage.
- the resin sheets of Comparative Examples 1 and 2 having an exothermic starting temperature of less than 120 ° C. the curing reaction progressed during storage at room temperature, and the minimum melt viscosity could not be measured.
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Abstract
Description
なお、最低溶融粘度は、実施例に記載の方法で測定できる。
なお、平均粒径は、例えば、母集団から任意に抽出される試料を用い、レーザー回折散乱式粒度分布測定装置を用いて測定することにより導き出すことができる。
なお、平均粒径は、例えば、母集団から任意に抽出される試料を用い、レーザー回折散乱式粒度分布測定装置を用いて測定することにより導き出すことができる。
シリカは通常、比重2.2g/cm3であるので、シリカの含有量(重量%)の好適範囲は例えば以下のとおりである。
すなわち、樹脂シート11中のシリカの含有量は、81重量%以上が好ましく、84重量%以上がより好ましい。樹脂シート11中のシリカの含有量は、94重量%以下が好ましく、91重量%以下がより好ましい。
すなわち、樹脂シート11中のアルミナの含有量は、88重量%以上が好ましく、90重量%以上がより好ましい。樹脂シート11中のアルミナの含有量は、97重量%以下が好ましく、95重量%以下がより好ましい。
図2A~2Cはそれぞれ、本発明の一実施形態に係る電子デバイスパッケージの製造方法の一工程を模式的に示す図である。本実施形態では、プリント配線基板12上に搭載されたSAWフィルタ13を樹脂シート11により中空封止して電子デバイスパッケージを作製する。
SAWフィルタ搭載基板準備工程では、複数のSAWフィルタ13が搭載されたプリント配線基板12を準備する(図2A参照)。SAWフィルタ13は、所定の櫛形電極が形成された圧電結晶を公知の方法でダイシングして個片化することにより形成できる。SAWフィルタ13のプリント配線基板12への搭載には、フリップチップボンダーやダイボンダーなどの公知の装置を用いることができる。SAWフィルタ13とプリント配線基板12とはバンプなどの突起電極13aを介して電気的に接続されている。また、SAWフィルタ13とプリント配線基板12との間は、SAWフィルタ表面での表面弾性波の伝播を阻害しないように中空部分14を維持するようになっている。SAWフィルタ13とプリント配線基板12との間の距離は適宜設定でき、一般的には15~50μm程度である。
封止工程では、SAWフィルタ13を覆うようにプリント配線基板12へ樹脂シート11を積層し、SAWフィルタ13を樹脂シート11で樹脂封止する(図2B参照)。樹脂シート11は、SAWフィルタ13及びそれに付随する要素を外部環境から保護するための封止樹脂として機能する。
封止体形成工程では、樹脂シート11を熱硬化処理して封止体15を形成する(図2B参照)。
続いて、封止体15のダイシングを行ってもよい(図2C参照)。これにより、SAWフィルタ13単位での電子デバイスパッケージ18を得ることができる。
必要に応じて、電子デバイスパッケージ18に対して再配線及びバンプを形成し、これを別途の基板(図示せず)に実装する基板実装工程を行うことができる。電子デバイスパッケージ18の基板への実装には、フリップチップボンダーやダイボンダーなどの公知の装置を用いることができる。
エポキシ樹脂:新日鐵化学(株)製のYSLV-80XY(ビスフェノールF型エポキシ樹脂、エポキン当量200g/eq.軟化点80℃)
フェノール樹脂:明和化成社製のMEH-7851-SS(ビフェニルアラルキル骨格を有するフェノール樹脂、水酸基当量203g/eq.軟化点67℃)
熱可塑性樹脂:三菱レイヨン社製メタブレンC-132E(MBS樹脂、平均粒径120μm)
フィラー:電気化学工業社製のFB-9454FC(溶融球状シリカ、平均粒子径20μm)
シランカップリング剤:信越化学社製のKBM-403(3-グリシドキシプロピルトリメトキシシラン)
シランカップリング剤処理フィラー:電気化学工業社製のFB-9454FC(溶融球状シリカ、平均一次粒子径20μm)を信越化学社製のKBM-403(3-グリシドキシプロピルトリメトキシシラン)で処理したもの(FB-9454FC 87.9重量部に対して、KBM-403 0.5重量部の割合で処理)
カーボンブラック:三菱化学社製の#20
難燃剤:伏見製薬所製のFP-100(ホスファゼン化合物)
硬化促進剤1:四国化成工業社製の2PHZ-PW(2-フェニル-4,5-ジヒドロキシメチルイミダゾール)
硬化促進剤2(包摂錯体):5-ニトロイソフタル酸と式(1)で表される2-エチル-4-メチルイミダゾールからなる包摂錯体
硬化促進剤3(包摂錯体):5-ニトロイソフタル酸と式(2)で表される2-フェニル-4,5-ジヒドロキシメチルイミダゾールからなる包摂錯体
硬化促進剤4(包摂錯体):5-ニトロイソフタル酸と式(3)で表される2-フェニル-4-メチル-5-ヒドロキシメチルイミダゾールからなる包摂錯体
硬化促進剤5:北興化学工業社製のTPP(トリフェニルホースフィン)
硬化促進剤6:四国化成工業社製の2E4MZ(2-エチル-4-メチルイミダゾール)
表1に記載の配合比に従い、各成分を配合し、ロール混練機により60~120℃、10分間、減圧条件下(0.01kg/cm2)で溶融混練し、混練物を調製した。次いで、得られた混練物を、平板プレス法により、シート状に形成して、厚さ200μmの樹脂シートを作製した。
樹脂シートを直径4mmの円形状に打抜いてサンプルを作製した。このサンプルについて、示差走査熱量計(TA Instrument製、DSC Q2000)を用いて、-50℃から300℃まで10℃/分で昇温させて、DSC曲線を描き、描いたDSC曲線から発熱開始温度及び発熱ピーク温度を読み取った。なお、発熱カーブの2次微分値がゼロになる温度で発熱カーブに接線を引き、ベースラインとの交点の温度を読み取り、これを発熱開始温度とした。
描いたDSC曲線から、発熱ピーク温度±30℃の温度範囲における面積(面積A)と、発熱ピーク面積全体(面積B)を求めた。そして、下記式により、発熱ピーク温度±30℃における発熱量の割合を算出した。
発熱ピーク温度±30℃の発熱量の割合(%)=面積A/面積B×100
動的粘弾性測定装置(TAインスツルメント社製、ARES)を用いて樹脂シートの最低溶融粘度を測定した(測定条件:ギャップ1mm、パラレルプレート直径8mm、測定周波数0.1Hz、50℃~150℃まで10℃/minで昇温測定)。
25℃で4週間保存した後の樹脂シートについて、保存前と同様の方法で、最低溶融粘度を測定した。
11a 支持体
13 SAWフィルタ
14 中空部分
15 封止体
18 電子デバイスパッケージ
Claims (8)
- 示差走査熱量計により測定される発熱開始温度が120℃以上であり、発熱ピーク温度が150~200℃である電子デバイス封止用樹脂シート。
- 前記示差走査熱量計により測定されるDSC曲線において、発熱ピーク温度±30℃の温度範囲における面積が、発熱ピーク面積全体に対して70%以上である請求項1に記載の電子デバイス封止用樹脂シート。
- 25℃の条件下で4週間保存した後の最低溶融粘度が、保存前の最低溶融粘度の2倍以下である請求項1又は2に記載の電子デバイス封止用樹脂シート。
- 前記電子デバイス封止用樹脂シート中のフィラーの含有量が70~90体積%である請求項1~3のいずれかに記載の電子デバイス封止用樹脂シート。
- エポキシ樹脂、フェノール樹脂、熱可塑性樹脂、フィラー及び硬化促進剤を混練して得られる混練物をシート状に塑性加工して得られる請求項1~4のいずれかに記載の電子デバイス封止用樹脂シート。
- 前記硬化促進剤がイミダゾール系硬化促進剤である請求項1~5のいずれかに記載の電子デバイス封止用樹脂シート。
- 前記イミダゾール系硬化促進剤が潜在性硬化促進剤である請求項1~6のいずれかに記載の電子デバイス封止用樹脂シート。
- 1又は複数の電子デバイスを覆うように請求項1~7のいずれかに記載の電子デバイス封止用樹脂シートを前記電子デバイス上に積層する積層工程、及び
前記電子デバイス封止用樹脂シートを硬化させて封止体を形成する封止体形成工程を含む電子デバイスパッケージの製造方法。
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CN201480019069.7A CN105074907B (zh) | 2013-03-28 | 2014-03-20 | 电子器件密封用树脂片以及电子器件封装体的制造方法 |
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CN105778410A (zh) * | 2014-12-18 | 2016-07-20 | 北京首科化微电子有限公司 | 包含三嵌段聚合物的环氧塑封料 |
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JP5976073B2 (ja) * | 2014-11-07 | 2016-08-23 | 日東電工株式会社 | 半導体装置の製造方法 |
JP6685080B2 (ja) * | 2014-11-07 | 2020-04-22 | 日東電工株式会社 | 電子デバイス封止用シート、及び、電子デバイスパッケージの製造方法 |
JP6533399B2 (ja) * | 2015-03-19 | 2019-06-19 | 日東電工株式会社 | 封止用シートおよびパッケージの製造方法 |
TWI761317B (zh) * | 2015-11-04 | 2022-04-21 | 日商琳得科股份有限公司 | 熱固化性樹脂膜、第一保護膜形成用片以及第一保護膜的形成方法 |
TWI638845B (zh) | 2015-11-04 | 2018-10-21 | 日商琳得科股份有限公司 | 熱固化性樹脂膜與第二保護膜形成膜的組件、熱固化性樹脂膜、第一保護膜形成用片以及半導體晶圓用第一保護膜的形成方法 |
JP6933463B2 (ja) * | 2016-12-28 | 2021-09-08 | 日東電工株式会社 | 樹脂シート |
WO2022202427A1 (ja) * | 2021-03-24 | 2022-09-29 | 太陽インキ製造株式会社 | 熱硬化性樹脂組成物、ドライフィルム、硬化物、プリント配線板および電気電子部品 |
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JPH0853601A (ja) * | 1994-08-10 | 1996-02-27 | Sumitomo Bakelite Co Ltd | 半導体封止用エポキシ樹脂組成物 |
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CN105778410A (zh) * | 2014-12-18 | 2016-07-20 | 北京首科化微电子有限公司 | 包含三嵌段聚合物的环氧塑封料 |
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SG11201507886UA (en) | 2015-10-29 |
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CN105074907B (zh) | 2019-06-18 |
TW201811973A (zh) | 2018-04-01 |
JP2014189790A (ja) | 2014-10-06 |
TW201446950A (zh) | 2014-12-16 |
JP5735029B2 (ja) | 2015-06-17 |
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