WO2009154186A1 - 非晶質シリカ質粉末、その製造方法、樹脂組成物、及び半導体封止材 - Google Patents
非晶質シリカ質粉末、その製造方法、樹脂組成物、及び半導体封止材 Download PDFInfo
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- WO2009154186A1 WO2009154186A1 PCT/JP2009/060914 JP2009060914W WO2009154186A1 WO 2009154186 A1 WO2009154186 A1 WO 2009154186A1 JP 2009060914 W JP2009060914 W JP 2009060914W WO 2009154186 A1 WO2009154186 A1 WO 2009154186A1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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- 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
- C08K3/34—Silicon-containing compounds
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- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- 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
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- 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
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to an amorphous siliceous powder, a production method thereof, and an application thereof.
- semiconductor flame retardants such as antimony compounds and brominated epoxy resins, which have a large environmental impact, in semiconductor encapsulants used for encapsulating semiconductor elements. It is required to impart flammability and to impart heat resistance to lead-free solder that does not contain lead.
- Semiconductor encapsulants are mainly composed of epoxy resins, phenol resin curing agents, curing accelerators, inorganic fillers, etc. In order to satisfy the above required characteristics, epoxy rings, phenol resins, etc. have aromatic rings.
- a method of applying a flame-retardant and heat-resistant structure containing a large amount of hydrogen, a method of highly filling an inorganic filler, and the like tend to increase the viscosity at the time of sealing the semiconductor sealing material.
- the semiconductor internal structure has rapidly progressed with thinner elements, smaller gold wires, longer spans, and higher wiring pitches. is doing.
- a semiconductor sealing material having a high viscosity defects such as gold wire deformation, gold wire cutting, inclination of the semiconductor element, and narrow gap unfilling result.
- the semiconductor sealing material is strongly required to reduce the viscosity during sealing and reduce molding defects while imparting flame retardancy.
- Patent Document 1 a technique of improving an epoxy resin or a phenol resin curing agent used for a semiconductor sealing material.
- a so-called latent method is used in which a reactive substrate is protected using a component that suppresses curability.
- Patent Documents 5 and 6 As an improvement from the inorganic filler side, a method of adjusting the particle size distribution or the like is employed so that the viscosity of the sealing material does not increase even when the filler is filled at a high level (Patent Documents 5 and 6).
- An object of the present invention is to provide a resin composition, particularly a semiconductor sealing material, which has a low viscosity at the time of sealing even when highly filled with an inorganic filler and has further improved moldability. It is to provide a suitable amorphous siliceous powder.
- the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m is 100 to 30000 ppm in terms of oxide
- the Al content in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m is 100 to 7000 ppm in terms of oxide
- the ratio (A) / (B) of the Al content (A) in the particle size region of 15 ⁇ m or more and less than 70 ⁇ m to the Al content (B) in the particle size region of 3 ⁇ m or more and less than 15 ⁇ m is 1.0-20. Preferably there is. Also, it has a multi-modal particle size distribution with at least two peaks in the frequency particle size distribution, the particle size range in which the maximum value of the first peak is 15 to 70 ⁇ m, and the maximum value of the second peak is 3 to 10 ⁇ m
- the average particle diameter is preferably 5 to 50 ⁇ m.
- the present invention is a method for producing an amorphous siliceous powder produced by injecting a raw siliceous powder containing an Al source material into a high-temperature flame formed by a combustible gas and an auxiliary combustion gas, Raw material siliceous powder having an Al content of the source material of 100 to 30,000 ppm in terms of oxide and an average particle size of 15 to 70 ⁇ m, and an average particle size of the Al content of the Al source material in the range of 100 to 7000 ppm in terms of oxide
- the present invention is a resin composition comprising the amorphous siliceous powder of the present invention and a resin.
- resin used for a resin composition an epoxy resin is preferable.
- this invention is a semiconductor sealing material using these resin compositions.
- a resin composition excellent in fluidity, viscosity characteristics and moldability particularly a semiconductor encapsulant.
- an amorphous siliceous powder suitable for preparing such a resin composition can be provided.
- the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m is 100 to 30000 ppm in terms of oxide
- the Al content in the size range of 3 ⁇ m or more and less than 15 ⁇ m is 100 to 7000 ppm in terms of oxide
- the Al content in the entire particle size range is 100 to 25000 ppm in terms of oxide.
- thermosetting temperature molding temperature
- anionic polymerization of the epoxy resin and the phenol resin curing agent is performed.
- a chain reaction proceeds and the encapsulant is thermally cured.
- the amorphous siliceous powder of the present invention is used, protons coordinated to the solid acid sites are released by heating.
- a phenomenon occurs in which the thermosetting reaction in the sealing material is delayed. That is, the amorphous siliceous powder of the present invention makes it possible to delay the thermosetting reaction of the resin in the encapsulant, and to prepare an encapsulant excellent in fluidity and viscosity characteristics during molding. it can.
- a preferable Al content in a particle size range of 15 ⁇ m or more and less than 70 ⁇ m is 500 to 20000 ppm, more preferably 1000 to 15000 ppm in terms of oxide.
- the Al content in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m is less than 100 ppm in terms of oxide, the amount of formation of solid acid points decreases, and the effect of delaying the thermosetting reaction of the resin becomes insufficient.
- it exceeds 7000 ppm the number of epoxy chains coordinated on the surface of the amorphous siliceous powder increases, so the rolling resistance of the amorphous siliceous powder increases, and the flowability and viscosity characteristics during molding deteriorate. To do.
- Even in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m the epoxy chain is coordinated on the surface of the amorphous siliceous powder.
- the mass of the particle itself is large, the influence of rolling resistance due to the coordination of the epoxy chain may be ignored.
- the mass of the particles is small, so that they are greatly affected by the rolling resistance due to the coordination of the epoxy chain. That is, in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m, Al content is included so that the effect of delaying the thermosetting reaction of the resin due to solid acid formation is expressed more than the influence of the increase in rolling resistance due to the coordination of the epoxy chain. It is important that the amount is 100 to 7000 ppm in terms of oxide.
- a preferable Al content in a particle size range of 3 ⁇ m or more and less than 15 ⁇ m is 200 to 5000 ppm, more preferably 350 to 3000 ppm in terms of oxide.
- the Al content in the entire particle size range is less than 100 ppm in terms of oxide, the amount of solid acid points formed is reduced, and the effect of delaying the thermosetting reaction of the resin becomes insufficient. If it exceeds 25000 ppm, the viscosity increases when the resin or the like is highly filled, and fluidity and moldability deteriorate. Furthermore, since the wear of the kneader and roll used at the time of mixing with the resin and the mold used at the time of molding become severe, it is not preferable.
- the preferable Al content in the whole particle size range is 300 to 18000 ppm, more preferably 500 to 12000 ppm.
- the amorphous siliceous powder of the present invention has a Si and Al oxide content of 99.5% by mass or more.
- Si and Al in terms of oxide is less than 99.5% by mass, that is, when the content other than SiO 2 and Al 2 O 3 exceeds 0.5% by mass, This is not preferable because substances that become unnecessary impurities increase. For example, some impurities may become ions and dissolve, which may adversely affect moldability.
- the content in terms of oxides of Si and Al is preferably 99.6% by mass or more, and more preferably 99.7% by mass or more.
- the content of Al and Si oxides in the amorphous siliceous powder of the present invention can be measured, for example, by fluorescent X-ray analysis. That is, 5 g of lithium tetraborate and 30 ⁇ l of a release agent (50% aqueous solution of lithium bromide) are added to 1 g of amorphous siliceous powder and melted at 1100 ° C. for 20 minutes to form a glass bead. This was measured using a fluorescent X-ray apparatus (for example, “Primus2” manufactured by Rigaku Denki Kogyo Co., Ltd.), and each content rate was determined from a calibration curve prepared from a standard sample of SiO 2 or Al 2 O 3 .
- a fluorescent X-ray apparatus for example, “Primus2” manufactured by Rigaku Denki Kogyo Co., Ltd.
- Rhodium (Rh) was used as an X-ray tube, and measurement was performed with an irradiation diameter of 30 mm and an output of 3.0 kW.
- the Al content in each particle size range it is 15 ⁇ m or more and less than 70 ⁇ m by a combination of a sieve operation using a 70 ⁇ m sieve, a sieve using a 15 ⁇ m sieve, and a filtration operation using a membrane filter having a pore size of 3 ⁇ m.
- Amorphous siliceous powder having a particle size range of 3 ⁇ m or more and less than 15 ⁇ m was collected and quantified in each particle size range.
- the amorphous siliceous powder of the present invention is a ratio of the Al content (A) in the particle size region of 15 ⁇ m or more and less than 70 ⁇ m to the Al content (B) in the particle size region of 3 ⁇ m or more and less than 15 ⁇ m, (A) / (B) Is more preferably 1.0 to 20.
- (A) / (B) is less than 1.0, it means that the Al content in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m is larger than the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m.
- the effect of increasing the rolling resistance due to the coordination of the epoxy chain of the particles having a particle size of 3 ⁇ m or more and less than 15 ⁇ m is not preferable.
- (A) / (B) exceeds 20, it means that the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m is more than 20 times higher than the Al content of the particle size range of 3 ⁇ m or more and less than 15 ⁇ m.
- the segregation of the solid acid points in each particle size range is not preferable because the dispersibility of the amorphous siliceous powder when used as a semiconductor sealing material is deteriorated and the moldability may be deteriorated.
- the ratio (A) / (B) is preferably 1.5 to 17, more preferably 2.0 to 15.
- the amorphous siliceous powder of the present invention has a multimodal particle size distribution having at least two peaks in the frequency particle size distribution. That is, the particle size measured by a laser diffraction / scattering particle size distribution analyzer (“Model LS-230” (manufactured by Beckman Coulter)) has a multi-modal particle size distribution having at least two peaks. It is preferable that the maximum value of the second peak is in the particle size range of 15 to 70 ⁇ m, and the maximum value of the second peak is in the particle size range of 3 to 10 ⁇ m. This facilitates the formation of a close-packed structure of amorphous siliceous powder and makes it easier to improve fluidity and viscosity characteristics during molding.
- the amorphous siliceous powder of the present invention preferably has an average particle size of 5 to 50 ⁇ m. If the average particle size is less than 5 ⁇ m, the moldability deteriorates, which is not preferable. On the other hand, if it exceeds 50 ⁇ m, there is a high risk of damage to the semiconductor chip, wire cutting, clogging of the mold gate portion, and the like.
- the average particle diameter is preferably 8 to 40 ⁇ m, particularly 10 to 35 ⁇ m.
- the maximum particle diameter is preferably 213 ⁇ m or less, more preferably 134 ⁇ m or less.
- Preparation of the laser diffraction / scattering particle size distribution measurement sample was performed using water as a medium, adjusting the concentration of PIDS (Polarization Intensity Differential Scattering) to 45 to 55% by mass, and using an ultrasonic homogenizer with 200 W output over 1 minute. .
- the refractive index of water was 1.33, and the refractive index of amorphous siliceous powder was 1.46.
- the particle size at which the cumulative mass is 50% is the average particle size
- the particle size at which the cumulative mass is 100% is the maximum particle size.
- the amorphous siliceous powder of the present invention preferably has an amorphous ratio measured by the following method of 95% or more.
- Amorphous ratio is specified by X-ray diffraction analysis using a powder X-ray diffractometer (for example, “Model Mini Flex” manufactured by RIGAKU) in the range of 2 ⁇ of CuK ⁇ ray of 26 ° to 27.5 °. It was measured from the intensity ratio of diffraction peaks.
- silica powder crystalline silica has a main peak at 26.7 °, but amorphous silica has no peak.
- the average sphericity of the amorphous siliceous powder of the present invention is preferably 0.80 or more. As a result, the rolling resistance in the semiconductor sealing material is reduced, and the fluidity and moldability can be improved.
- the average sphericity is obtained by taking a particle image taken with a stereomicroscope (for example, trade name “Model SMZ-10” manufactured by Nikon Corporation) into an image analysis apparatus (for example, trade name “MacView” manufactured by Mountec Co., Ltd.). Measured from the projected area (A) and the perimeter (PM).
- the circularity of individual particles quantitatively automatically measured by a particle image analyzer (Circularity) It can be obtained by conversion based on 2 .
- the production method of the present invention is a method for producing an amorphous siliceous powder produced by injecting a raw siliceous powder containing an Al source material into a high-temperature flame formed by a combustible gas and an auxiliary combustion gas, Raw material siliceous powder having an Al content of the Al source material of 100 to 30000 ppm in terms of oxide and an average particle size of 15 to 70 ⁇ m, and an average particle having an Al content of the Al source material of 100 to 7000 ppm in terms of oxide
- the average particle diameter of the amorphous siliceous powder obtained by the production method of the present invention and the Al content of the Al source material are approximately the same as the average particle diameter and the Al content of the raw siliceous powder. Therefore, when the average particle diameter of the raw siliceous powder and the Al content of the Al source material deviate from the above-described ranges, it becomes difficult to produce the amorphous siliceous powder of the present invention.
- raw material siliceous powders having an average particle size of 15 to 70 ⁇ m and 3 to 10 ⁇ m contain Al source materials having an Al content in the above-mentioned range, if they are injected from the same burner, diffusion of the Al source material causes
- the amorphous siliceous material of the present invention wherein the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m is 100 to 30000 ppm in terms of oxide, and the Al content in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m is 100 to 7000 ppm in terms of oxide It will be difficult to meet the powder requirements.
- the raw siliceous powder should be silica-containing mineral powders such as high-purity silica, high-purity silica sand, quartz and quartz, and high-purity silica powder produced by synthetic methods such as precipitated silica and silica gel.
- silica powder is most preferable.
- Silica powder having various particle sizes pulverized by a pulverizer such as a vibration mill and a ball mill is commercially available, and silica powder having a desired average particle size may be appropriately selected.
- the Al source material is preferably an aluminum oxide powder.
- the Al source material include aluminum oxide, aluminum hydroxide, aluminum sulfate, aluminum chloride, and an aluminum organic compound, but since the aluminum oxide is close to the melting point of the raw siliceous powder, the raw siliceous material is injected from the burner. It is most preferable because it is easily fused to the surface of the powder and has a low impurity content.
- the average particle size of the aluminum oxide powder is preferably 0.01 to 10 ⁇ m. When the average particle size is less than 0.01 ⁇ m, the powder tends to aggregate, and the composition when fused with the siliceous powder tends to be heterogeneous. Similarly, when fused with the siliceous powder even when it exceeds 10 ⁇ m The composition becomes inhomogeneous.
- a preferable range of the average particle diameter is 0.03 to 8 ⁇ m, more preferably 0.05 to 5 ⁇ m.
- a collector connected to a furnace body equipped with a burner Is used.
- the furnace body may be an open type or a closed type, or a vertical type or a horizontal type.
- the collection device is provided with one or more of a gravity settling chamber, a cyclone, a bag filter, an electrostatic precipitator, etc., and the produced amorphous siliceous powder can be collected by adjusting the collection conditions. it can. Examples thereof include Japanese Patent Application Laid-Open Nos. 11-57451 and 11-71107.
- the resin composition of the present invention is a resin composition comprising the amorphous siliceous powder of the present invention and a resin.
- the content of amorphous siliceous powder in the resin composition is 10 to 95% by mass, more preferably 30 to 90% by mass.
- the resin examples include epoxy resin, silicone resin, phenol resin, melamine resin, urea resin, unsaturated polyester, fluororesin, polyamide such as polyimide, polyamideimide, and polyetherimide, polyester such as polybutylene terephthalate and polyethylene terephthalate, polyphenylene sulfide , Aromatic polyester, polysulfone, liquid crystal polymer, polyethersulfone, polycarbonate, maleimide modified resin, ABS resin, AAS (acrylonitrile-acrylic rubber / styrene) resin, AES (acrylonitrile / ethylene / propylene / diene rubber / styrene) resin, etc. can do.
- AAS acrylonitrile-acrylic rubber / styrene
- AES acrylonitrile / ethylene / propylene / diene rubber / styrene
- an epoxy resin having two or more epoxy groups in one molecule is preferable.
- phenol novolac type epoxy resin orthocresol novolak type epoxy resin, epoxidized phenol and aldehyde novolak resin, glycidyl ether such as bisphenol A, bisphenol F and bisphenol S, phthalic acid and dimer Glycidyl ester acid epoxy resin, linear aliphatic epoxy resin, cycloaliphatic epoxy resin, heterocyclic epoxy resin, alkyl-modified polyfunctional epoxy resin obtained by reaction of polybasic acid such as acid and epochorohydrin, ⁇ -Naphthol novolac type epoxy resin, 1,6-dihydroxynaphthalene type epoxy resin, 2,7-dihydroxynaphthalene type epoxy resin, bishydroxybiphenyl type epoxy resin, and halogen such as bromine to impart flame retardancy It is introduced epoxy resin.
- orthocresol novolac type epoxy resins from the viewpoint of moisture resistance and solder reflow resistance, orthocresol novolac type epoxy resins, bishydroxybiphenyl type epoxy resins, epoxy resins having a naphthalene skeleton, and the like are preferable.
- the resin composition of the present invention contains an epoxy resin curing agent or an epoxy resin curing agent and an epoxy resin curing accelerator.
- the epoxy resin curing agent include one or a mixture of two or more selected from the group of phenol, cresol, xylenol, resorcinol, chlorophenol, t-butylphenol, nonylphenol, isopropylphenol, octylphenol, and the like.
- novolak-type resin obtained by reacting with para-xylene under an oxidation catalyst polyparahydroxystyrene resin, bisphenol compounds such as bisphenol A and bisphenol S, trifunctional phenols such as pyrogallol and phloroglucinol, maleic anhydride, anhydrous Examples include acid anhydrides such as phthalic acid and pyromellitic anhydride, and aromatic amines such as metaphenylenediamine, diaminodiphenylmethane, and diaminodiphenylsulfone. .
- the above-described curing accelerators such as triphenylphosphine, benzyldimethylamine, 2-methylimidazole and the like can be used.
- the following components can be further blended as necessary. That is, as a low stress agent, silicone rubber, polysulfide rubber, acrylic rubber, butadiene rubber, rubbery substances such as styrene block copolymers and saturated elastomers, various thermoplastic resins, resinous substances such as silicone resins, Is an epoxy resin, a resin obtained by modifying a part or all of a phenol resin with aminosilicone, epoxysilicone, alkoxysilicone, or the like.
- silane coupling agent ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4- Epoxy cyclohexyl) Epoxy silanes such as ethyltrimethoxysilane, aminopropyltriethoxysilane, ureidopropyltriethoxysilane, aminosilanes such as N-phenylaminopropyltrimethoxysilane, phenyltrimethoxysilane, methyltri Hydrophobic silane compounds such as methoxysilane and octadecyltrimethoxysilane, mercaptosilane and the like, surface treatment agents such as Zr chelates, titanate coupling agents and aluminum coupling agents, and flame retardant aids such as Sb 2 O 3 and Sb 2 O 4 , Sb 2 O 5 , flame retardants, halogenated epoxy resins, phosphorus compounds, etc., colorants, carbon black, iron oxide, dye
- the resin composition of the present invention is produced by blending a predetermined amount of each of the above materials with a blender, a Henschel mixer, etc., then kneading with a heating roll, kneader, uniaxial or biaxial extruder, etc. can do.
- the semiconductor encapsulant of the present invention is one in which the resin composition contains an epoxy resin and comprises a composition containing an epoxy resin curing agent and an epoxy resin curing accelerator.
- conventional molding means such as a transfer molding method and a vacuum printing molding method are employed.
- Examples 1 to 28 Comparative Examples 1 to 12 After preparing various raw material siliceous powders (silica powder) having different average particle diameters, adding and mixing various types and amounts of Al source materials, the apparatus described in JP-A-11-57451 Using a device with two burners, raw silica powder (raw material 1) with an average particle size of 10 to 72 ⁇ m from one burner, and raw silica with an average particle size of 2 to 16 ⁇ m from the other burner Powder (raw material 2) was sprayed and melted and spheroidized in a flame to produce various amorphous siliceous powders.
- raw silica powder raw material 1 with an average particle size of 10 to 72 ⁇ m from one burner
- raw silica with an average particle size of 2 to 16 ⁇ m from the other burner Powder raw material 2 was sprayed and melted and spheroidized in a flame to produce various amorphous siliceous powders.
- the adjustment of the Al content in the particle size range of 15 ⁇ m or more and less than 70 ⁇ m of the amorphous siliceous powder, the Al content in the particle size range of 3 ⁇ m or more and less than 15 ⁇ m, and the adjustment of the Al content in all the particle size ranges are as follows. This was carried out by adjusting the amount of the Al source material added to the powder and the supply amount of the raw siliceous powder having various average particle diameters to the flame. In addition, adjustment of the average particle size and particle size distribution of the amorphous siliceous powder can be achieved by adjusting the average particle size of each raw material siliceous powder and the amount supplied to the flame.
- the amorphous ratio of the obtained amorphous siliceous powder was 99% or more, and the average sphericity was 0.80 or more.
- each component was blended at the blending ratio shown in Tables 1 to 6, and dry blended with a Henschel mixer.
- the kneaded material (discharged material) is pressed with a press and cooled, and then pulverized to produce a semiconductor encapsulant. Viscosity characteristics (curastometer torque), moldability (wire deformation rate), and fluidity (spiral) Flow) was evaluated according to the following. The results are shown in Tables 1 to 3.
- epoxy resin 1 biphenyl aralkyl type epoxy resin (NC-3000P manufactured by Nippon Kayaku Co., Ltd.)
- epoxy resin 2 biphenyl type epoxy resin (YX-4000H manufactured by Japan Epoxy Resin Co., Ltd.) were used.
- phenol resin 1 biphenyl aralkyl resin (manufactured by Nippon Kayaku Co., Ltd .: MEH-7851SS), phenol resin 2: phenol aralkyl resin (Mirex XLC-4L, manufactured by Mitsui Chemicals) were used.
- coupling agent 1 epoxy silane (manufactured by Shin-Etsu Chemical Co., Ltd .: KBM-403), coupling agent 2: phenylaminosilane (manufactured by Shin-Etsu Chemical Co., Ltd .: KBM-573) were used.
- curing accelerator 1 triphenylphosphine (manufactured by Hokuko Chemical Co., Ltd .: TPP)
- curing accelerator 2 tetraphenylphosphonium tetraphenylborate (manufactured by Hokuko Chemical Co., Ltd .: TPP-K) was used.
- carnauba wax manufactured by Clariant was used as a release agent.
- the gold wire deformation ratio was determined as (Y / X) ⁇ 100 (%) by measuring the shortest wire distance X before sealing and the maximum displacement Y of the wire after sealing. This value was the average of the deformation rates of 12 gold wires.
- the gold wire has a diameter of 30 ⁇ m and an average length of 5 mm.
- the transfer molding conditions were a mold temperature of 175 ° C., a molding pressure of 7.4 MPa, and a pressure holding time of 90 seconds. The smaller this value, the smaller the amount of wire deformation and the better the moldability.
- the resin composition excellent in fluidity, viscosity characteristics and moldability as compared with the comparative examples, particularly the semiconductor sealing material. can be prepared.
- the amorphous siliceous powder of the present invention is used as a filler for semiconductor sealing materials used in automobiles, portable electronic devices, personal computers, home appliances, etc., and laminates on which semiconductors are mounted.
- the resin composition of the present invention is used as a prepreg for printed circuit boards, various engineer plastics, etc. formed by impregnating and curing glass woven fabric, glass nonwoven fabric, and other organic base materials in addition to the semiconductor sealing material. it can.
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Abstract
Description
平均粒子径の異なる種々の原料シリカ質粉末(珪石粉末)を準備し、種々の種類及び量のAl源物質を添加して混合した後に、特開平11-57451号公報に記載された装置に、2本バーナーを配置させた装置を用いて、一方のバーナーからは平均粒子径が10~72μmの原料シリカ質粉末(原料1)、もう一方のバーナーからは平均粒子径が2~16μmの原料シリカ質粉末(原料2)を噴射し、火炎中で溶融、球状化処理して、種々の非晶質シリカ質粉末を製造した。なお、非晶質シリカ質粉末の15μm以上70μm未満の粒度域のAl含有量、3μm以上15μm未満の粒度域のAl含有量、全粒度域のAl含有量の調整は、各粒度域の原料シリカ質粉末に添加するAl源物質の量、種々の平均粒子径の原料シリカ質粉末の火炎への供給量を調整することによって行った。また、非晶質シリカ質粉末の平均粒子径及び粒度分布の調整は、それぞれの原料シリカ質粉末の平均粒子径、火炎への供給量を調整することによって、平均球形度、非晶質率は原料シリカ質粉末の火炎への供給量や火炎温度などによって行った。なお、火炎の形成には、LPG、酸素ガスを用い、原料粉末をバーナーまで搬送するキャリアガスにも酸素ガスを使用した。それらの条件と、得られた非晶質シリカ質粉末の特性を表1~6に示す。
上記で得られた半導体封止材の粘度特性を次のようにして測定した。キュラストメーター(例えばJSRトレーディング社製商品名「キュラストメーター モデル3P-S型」)を用い、半導体封止材を110℃に加熱した際の30秒後のトルクを粘度指数とした。この値が小さいほど、粘度特性が良好であることを示す。
上記で得られた半導体封止材の成形性をつぎのようにして測定した。BGA用基板に、ダイアタッチフィルムを介して、サイズ8mm×8mm×0.3mmの模擬半導体素子を2枚重ね、金ワイヤーで接続した後、各半導体封止材を使用し、トランスファー成形機を用いて、パッケージサイズ38mm×38mm×1.0mmに成形後、175℃で8時間養生して、BGA型半導体を作製した。半導体の金ワイヤーの部分を軟X線透過装置で観察し、金ワイヤー変形率を測定した。金ワイヤー変形率は、封止前のワイヤー最短距離Xおよび、封止後のワイヤーの最大変位量Yを測定し、(Y/X)×100(%)として求めた。この値は12本の金ワイヤー変形率の平均値とした。なお、金ワイヤーの径は直径30μm、平均長さは5mmである。トランスファー成形条件は、金型温度175℃、成形圧力7.4MPa、保圧時間90秒とした。この値が小さいほど、ワイヤー変形量が小さく、成形性が良好であることを示す。
EMMI-I-66(Epoxy Molding Material Institute;Society of Plastic Industry)に準拠したスパイラルフロー測定用金型を取り付けたトランスファー成形機を用い、各半導体封止材のスパイラルフロー値を測定した。なお、トランスファー成形条件は、金型温度175℃、成形圧力7.4MPa、保圧時間120秒とした。この値が大きいほど、流動性が良好であることを示す。
Claims (7)
- 15μm以上70μm未満の粒度域のAl含有量が酸化物換算で100~30000ppm、3μm以上15μm未満の粒度域のAl含有量が酸化物換算で100~7000ppmであり、全粒度域のAl含有量が酸化物換算で100~25000ppmである、Si及びAlの酸化物換算の含有率が99.5質量%以上の非晶質シリカ質粉末。
- 3μm以上15μm未満の粒度域のAl含有量(B)に対する15μm以上70μm未満の粒度域のAl含有量(A)の比(A)/(B)が1.0~20である請求項1に記載の非晶質シリカ質粉末。
- 頻度粒度分布において少なくとも二つの山を持つ多峰性の粒度分布を有し、第一の山の極大値が15~70μmの粒度域内、第二の山の極大値が3~10μmの粒度域内にあり、平均粒子径が5~50μmである請求項1又は2に記載の非晶質シリカ質粉末。
- 可燃ガスと助燃ガスとによって形成された高温火炎中に、Al源物質を含む原料シリカ質粉末を噴射して製造する非晶質シリカ質粉末の製造方法であって、Al源物質のAl含有量が酸化物換算で100~30000ppmである平均粒子径が15~70μmの原料シリカ質粉末と、Al源物質のAl含有量が酸化物換算で100~7000ppmである平均粒子径が3~10μmの原料シリカ質粉末を別々のバーナーから噴射する請求項1~3のいずれか一項に記載の非晶質シリカ質粉末の製造方法。
- 請求項1~3のいずれか一項に記載の非晶質シリカ質粉末と、樹脂とを含有してなる樹脂組成物。
- 樹脂がエポキシ樹脂である請求項5に記載の樹脂組成物。
- 請求項5又は6に記載の樹脂組成物を用いた半導体封止材。
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JP2010517915A JP5526027B2 (ja) | 2008-06-20 | 2009-06-16 | 非晶質シリカ質粉末、その製造方法、樹脂組成物、及び半導体封止材 |
KR1020107028264A KR101530745B1 (ko) | 2008-06-20 | 2009-06-16 | 비정질 실리카질 분말, 그의 제조 방법, 수지 조성물, 및 반도체 밀봉재 |
CN200980123257.3A CN102066254B (zh) | 2008-06-20 | 2009-06-16 | 无定形二氧化硅粉末、其制造方法、树脂组合物及半导体密封材料 |
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JP2015078080A (ja) * | 2013-10-15 | 2015-04-23 | 新日鉄住金マテリアルズ株式会社 | 球状シリカ粒子、その製造法およびこれを含有する樹脂組成物 |
JP2015078105A (ja) * | 2013-10-18 | 2015-04-23 | 新日鉄住金マテリアルズ株式会社 | 球状非晶質シリカ粒子、その製造方法およびこれを含有する樹脂組成物 |
JP2019182715A (ja) * | 2018-04-13 | 2019-10-24 | デンカ株式会社 | 非晶質シリカ粉末、樹脂組成物、及び半導体封止材 |
JP2020045263A (ja) * | 2018-09-20 | 2020-03-26 | 太平洋セメント株式会社 | 無機酸化物中空粒子及びその製造方法 |
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CN113583390A (zh) * | 2021-09-08 | 2021-11-02 | 深圳先进电子材料国际创新研究院 | 一种环氧基封装材料增韧改性的方法 |
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US8592504B2 (en) | 2013-11-26 |
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SG192419A1 (en) | 2013-08-30 |
JPWO2009154186A1 (ja) | 2011-12-01 |
US20110077329A1 (en) | 2011-03-31 |
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