WO2016002925A1 - 複合体とその製造方法 - Google Patents
複合体とその製造方法 Download PDFInfo
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- WO2016002925A1 WO2016002925A1 PCT/JP2015/069254 JP2015069254W WO2016002925A1 WO 2016002925 A1 WO2016002925 A1 WO 2016002925A1 JP 2015069254 W JP2015069254 W JP 2015069254W WO 2016002925 A1 WO2016002925 A1 WO 2016002925A1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C26/00—Alloys containing diamond or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/08—Metallic powder characterised by particles having an amorphous microstructure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/12—Metallic powder containing non-metallic particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C45/00—Amorphous alloys
- C22C45/04—Amorphous alloys with nickel or cobalt as the major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/02—Alloys based on gold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12049—Nonmetal component
- Y10T428/12056—Entirely inorganic
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12069—Plural nonparticulate metal components
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12069—Plural nonparticulate metal components
- Y10T428/12076—Next to each other
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12014—All metal or with adjacent metals having metal particles
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12069—Plural nonparticulate metal components
- Y10T428/12076—Next to each other
- Y10T428/12083—Nonmetal in particulate component
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12889—Au-base component
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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
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12944—Ni-base component
Definitions
- the present invention relates to a composite and a method for producing the same.
- the Al—SiC composite material has a thermal conductivity of 300 W / mK or less regardless of how the conditions are optimized, and development of a heat dissipation member having a higher thermal conductivity than that of copper has been developed. It has been demanded.
- a metal-diamond composite material having a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element material has been proposed by combining the high thermal conductivity of diamond and the large thermal expansion coefficient of metal. (Patent Document 2).
- metal-diamond composites can hardly be processed with ordinary diamond tools, and how low the cost is to use metal-diamond composites as heat sinks that are small and have various shapes.
- the problem is whether to perform shape processing. In response to such problems, laser processing, water jet processing, and metal-ceramic composites can be energized, and processing methods using electric discharge processing have been studied.
- the metal-diamond composite has problems that the processing cost is high, the processing time is long, and the productivity is low as compared with processing with a normal diamond tool even when the above processing method is used. In addition, it is difficult to produce a multistage shape or a complicated shape.
- the surface accuracy of the bonding interface is important for heat dissipation.
- the surface roughness of the bonding surface is rough, and as a result, the thermal resistance of the contact interface increases, which is not preferable. For this reason, as a characteristic required for the heat sink material, there is a problem of how to reduce the surface roughness.
- an object of the present invention is to provide a composite having a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element, and easy to mold into a predetermined shape, and a method for manufacturing the same.
- the first peak of the volume distribution of the particle diameter is from 5 to 25 ⁇ m
- the second peak is from 55 to 195 ⁇ m
- the volume distribution area and the particle diameter is from 45 to 195 ⁇ m. Obtained by pressure-molding a mixed powder of 50 vol% to 80 vol% of diamond powder and 20 vol% to 50 vol% of metal powder with a ratio of 205 ⁇ m to the volume distribution area of 1: 9 to 4: 6 A composite is provided.
- the metal powder is an aluminum powder, an aluminum alloy powder, or a mixed powder made of a metal other than aluminum and aluminum.
- a metal layer composed of an Au layer having a thickness of 0.05 to 4 ⁇ m is sequentially formed, and the total thickness of the Ni layer and the amorphous Ni alloy layer is 1.0 to 10 ⁇ m.
- the first peak of the volume distribution of the particle diameter is from 5 to 25 ⁇ m
- the second peak is from 55 to 195 ⁇ m
- the volume distribution area and the particle diameter is from 45 to 195 ⁇ m.
- the metal powder is an aluminum powder, an aluminum alloy powder, or a mixed powder made of a metal other than aluminum and aluminum.
- the composite according to the present invention has high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element, and can be easily molded into a predetermined shape.
- complex which concerns on this invention has high thermal conductivity and a thermal expansion coefficient close
- the symbol “ ⁇ ” means “above” and “below”.
- a to B means more than A and less than B.
- both sides means both the front surface and the back surface of a flat member.
- the “side surface portion” means a portion of the flat plate-like member that is substantially perpendicular to both surfaces of the both surfaces.
- the “hole portion” is a through-hole that is formed so as to penetrate the upper and lower surfaces of the flat plate-shaped composite body that is provided for screwing the component of the present embodiment to another heat radiating member. means.
- the composite of this embodiment has a volume distribution area and a particle diameter in which the first peak of the volume distribution of the particle diameter is 5 to 25 ⁇ m, the second peak is 55 to 195 ⁇ m, and the particle diameter is 1 to 35 ⁇ m.
- a mixed powder of diamond powder 50 volume% to 80 volume% and metal powder 20 volume% to 50 volume% with a ratio of the volume distribution area of 45 to 205 ⁇ m of 1 to 9 to 4 to 6 is pressed. Obtained.
- the composite having the above structure has a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element, and can be formed into a predetermined shape.
- complex of this embodiment is demonstrated.
- the composite in the present embodiment is obtained by press-molding a raw material containing diamond powder and metal powder at a predetermined temperature and pressure.
- Diamond powder As the raw material diamond powder, either natural diamond powder or artificial diamond powder can be used. Moreover, you may add binders, such as a silica, to this diamond powder as needed. By adding the binder, an effect that a molded body can be formed can be obtained.
- binders such as a silica
- the particle size of the first peak of the volume distribution of the particle size is 5 ⁇ m to 25 ⁇ m
- the particle size of the second peak is 55 ⁇ m to 195 ⁇ m
- the volume of 1 ⁇ m to 35 ⁇ m including the first peak in the volume distribution is preferably 1 to 9 to 4 to 6.
- each diamond powder is added to pure water to prepare a slurry, which is used as a measurement solution.
- the water is measured with a spectrophotometer at a refractive index of 1.33 and a refractive index of diamond of 2.42.
- the content of diamond particles in the composite of the present embodiment is preferably 50% by volume or more and 80% by volume or less. If the content of diamond particles is 50% by volume or more, the thermal conductivity of the resulting composite can be sufficiently ensured. Moreover, it is preferable that content of a diamond particle is 80 volume% or less from the surface of a filling property. If it is 80 volume% or less, it is not necessary to process the shape of diamond particles into a spherical shape or the like, and a composite can be obtained at a stable cost.
- Diamond powder in which a ⁇ -type silicon carbide layer is formed on the surface of the diamond particles may be used. This can suppress the generation of low thermal conductivity of the metal carbide formed during compounding (Al 4 C 3), and can improve the wettability with the molten aluminum. As a result, an effect that the thermal conductivity of the obtained composite is improved can be obtained.
- the metal powder used as the raw material is preferably an aluminum powder, an aluminum alloy powder, or a mixed powder of metal other than aluminum and aluminum.
- the composition of the aluminum alloy powder is preferably 77 to 100% by mass of aluminum, 0 to 20% by mass of silicon and 0 to 3% by mass of magnesium.
- the composition of the mixed powder in the case of mixing aluminum and a metal other than aluminum is preferably 77 to 100% by mass of aluminum, 0 to 20% by mass of silicon, and 0 to 3% by mass of magnesium. If a silicon component is 20 mass% or less, the heat conductivity of the obtained alloy will not fall, and the heat conductivity of the composite obtained will not fall.
- the magnesium component has the effect of improving the adhesion between the obtained alloy and silicon carbide, and if it is 3% by mass or less, it is difficult to produce aluminum carbide (Al 4 C 3 ) at the time of compounding, and the thermal conductivity and strength are high. In terms of surface. Moreover, since heat conductivity will not fall if it is 1 mass% or less, other metals, such as nickel, cobalt, copper, titanium, iron, may be contained.
- the metal powder a powder obtained by mixing at least one powder selected from the above-mentioned aluminum powder, aluminum alloy powder, and powder of metal other than aluminum may be used.
- the content of these metal powders is preferably 20% by volume to 50% by volume with respect to the resulting composite.
- the content (volume%) of the metal powder is calculated by setting the average density of the metal powder to 2.7 g / cm 3 .
- the content of the metal powder is 20% by volume or more, the amount of the metal powder at the time of hot press molding is sufficient, and the composite is sufficiently densified.
- the content of the metal powder is 50% by volume or less, a dense composite can be obtained, and the thermal expansion coefficient of the composite is suppressed.
- the average particle size of the metal powder is preferably about 10 ⁇ m to 100 ⁇ m.
- the average particle diameter is 10 ⁇ m or more, densification is promoted by oxidation of the metal particle surface.
- the average particle diameter is 100 ⁇ m or less, densification of metal particles due to creep deformation is difficult to be inhibited.
- the mixing method of the raw material powder is not particularly limited as long as the individual raw materials are uniformly mixed. Ball mill mixing, mixing with a mixer, and the like are possible. Regarding the mixing time, a time that does not allow the oxidation and pulverization of the raw material powder is preferred, and depending on the mixing method and filling amount, a time of about 15 minutes to 5 hours is preferred. If the mixing time is within this range, it is possible to suppress insufficient densification of the composite and non-uniformity of the composite structure, and pulverization occurs due to oxidation and pulverization of the raw material powder, which decreases the thermal conductivity of the composite. Can be suppressed. Moreover, if it can be removed at the heating stage at the time of hot press molding, a shape-retaining binder or the like can be used as necessary.
- the metal mold used in the pressure molding of the present embodiment can be made of iron material such as cast iron or stainless steel or ceramic such as silicon nitride from the viewpoint of strength.
- a graphite mold can also be used.
- the mold can be used by applying a release agent to the surface from the viewpoint of releasability with the composite obtained by pressure molding.
- a mold release agent such as graphite, alumina, boron nitride or the like is suitable.
- a release plate such as a graphite sheet can be used between the mold and the product as necessary.
- the mold structure is preferably composed of a middle mold that determines the outer shape of the composite during molding and upper and lower punches.
- a mixed powder of metal powder and diamond powder is filled in the above mold and heated to a temperature below the melting point of the metal powder to be used.
- the heating temperature is preferably 300 ° C. to 660 ° C. More preferably, it is 550 ° C to 650 ° C. If heating temperature is 300 degreeC or more, metal powder will be easy to deform
- the pre-forming pressure is preferably 10 MPa to 300 MPa, and the pressing time is preferably 1 minute to 30 minutes. If the pressure at the time of preforming is 10 MPa or more, densification is sufficient.
- the upper limit of the pressing pressure is not limited in terms of characteristics, but is preferably 300 MPa or less from the strength of the mold and the strength of the apparatus. Densification is sufficient when the pressing time is 1 minute or more.
- the upper limit of the pressurization time is not limited in terms of characteristics, but is preferably 30 minutes or less in consideration of the possibility of failure of the apparatus and the mold and production efficiency.
- the thickness of the composite is preferably 0.4 mm or more, and the thickness is preferably 6 mm or less in consideration of the cost and thermal conductivity of the material.
- a method for forming a multi-stage composite as shown in FIG. 2 or 3 will be described.
- a method of forming a composite body having such a shape for example, a mold B (9 in FIG. 5 or FIG. 6) in which a desired step-shaped recess is provided at a place where a bottom punch is desired to be finally formed and an upper punch Can be easily formed by using a mold C (10 in FIG. 5) having no unevenness.
- the composite When used as a heat sink for a semiconductor element, it may have a complicated shape, a screw hole, a notch, or the like.
- the composite is an extremely hard and difficult-to-process material, and processing costs increase if the complex shape as shown in FIG. 4 or a hole is processed by laser processing, water jet processing, or the like.
- a method for forming a composite with a notch for example, a mold D (13 in FIG. 7 or FIG. 8) provided with a lower punch of a target shape and a metal provided with a slit having the same shape as the shape of the lower punch.
- Type E (14 in FIG. 7) can be used.
- a pin is disposed at a place where a hole is finally required in the lower punch of the mold, and a slit is provided in the upper punch at a position similar to the pin position of the lower punch. I can do it.
- the pin material to be placed in the mold must have a melting point higher than the heat forming temperature and may be a metal material such as stainless steel or die steel, or a ceramic material such as silicon nitride, aluminum nitride, or alumina. Since the raw material diamond used in the embodiment is hard, it is preferably a material having excellent wear resistance. For this reason, it is preferable to fix the pin to the mold by a detachable method such as screwing because it is easy to replace when worn.
- the pin diameter needs to be designed in consideration of the thermal expansion coefficient of the material used for the pin, and the pin thermal expansion coefficient at the time of thermoforming and the shrinkage amount of the hole at the time of cooling in the composite thermal expansion coefficient.
- the draft of 1 to 5 ° in consideration of the extraction of the composite after thermoforming.
- the draft is 1 ° or more, the occurrence of cracks around the pin portion can be suppressed when the composite is extracted. If the draft is 5 ° or less, the hole size difference between both main surfaces of the composite does not increase, and it is possible to suppress occurrence of positional deviation and insufficient tightening force during attachment.
- the clearance between the upper and lower mold pins and slits is preferably in the range of 0.01 mm to 1.0 mm. If the clearance between the upper and lower mold pins and slits is 0.01 mm or more, if there is a temperature difference between the upper and lower molds, the slit diameter will be smaller than the pin diameter, and the pins and slits will contact each other during heat molding, causing the mold to deteriorate. Can be suppressed. Further, if the clearance between the pin and the slit of the upper and lower molds is 1 mm or less, the strength around the hole can be maintained without lowering the density around the hole in the composite.
- Annealing treatment performed for the purpose of removing strain at the time of compounding is preferably performed at a temperature of 400 ° C. to 550 ° C. for 10 minutes or more. If the annealing temperature is 400 ° C. or higher, it is possible to prevent the distortion in the composite from being sufficiently released and the shape from being changed by heat treatment after machining. If the annealing temperature is 550 ° C. or lower, the aluminum alloy in the composite can be prevented from melting. If the annealing time is 10 minutes or longer, it is possible to prevent the internal distortion of the composite from being sufficiently released at the annealing temperature and to change the thermal expansion coefficient and dimensions. When the above conditions are satisfied, a sufficient annealing effect can be obtained even if cooling is performed as it is after pressure molding.
- the composite of this embodiment is used as a heat dissipation component, as shown in FIG. 1, the composite layer (3 in FIG. 1), the surface layer 4, the Ni layer 5, and the amorphous provided on both surfaces of the composite unit 3.
- the heat radiating component 1 including the surface metal layer 2 made of the Ni alloy layer 6 and the Au layer 7 can be obtained.
- a surface layer mainly composed of aluminum it is suitable for plating the composite.
- the material for the surface layer aluminum or aluminum alloy that is easy to adhere to the composite is preferable.
- a foil or a plate of aluminum or aluminum alloy having a thickness of 0.01 mm to 1 mm is 100 K lower than the melting point to a temperature lower than the melting point. It can be compounded on the surface of the composite by pressure molding at a temperature of.
- Metal layer When the composite body of this embodiment is used as a heat sink for a semiconductor element, it is often used by bonding to the semiconductor element by brazing. Therefore, it is preferable to provide a metal layer on the bonding surface of the composite.
- a method for forming the metal layer a plating method, a vapor deposition method, a sputtering method, or the like can be employed. From the viewpoint of cost, the treatment by the plating method is preferable, and the treatment by the plating method will be described below.
- the surface of the composite is preferably subjected to crystalline Ni plating with a film thickness of 0.5 ⁇ m to 6.5 ⁇ m. If the Ni plating film thickness is 1 ⁇ m or more, pinholes (unplated portions) of the plating film are unlikely to occur, and if it is 5 ⁇ m or less, residual stress is unlikely to occur in the plating film. The problem of swelling, peeling and cracking of the plating film hardly occurs due to the load.
- the plating method is preferably an electroplating method, but an electroless plating method can also be applied as long as a crystalline Ni plating film can be obtained.
- the peel strength is preferably 5 kgf / cm or more, more preferably 8 kgf / cm or more.
- the peel strength is 5 kgf / cm or more, when used as a heat dissipation component of a semiconductor element, the problem that the plating layer is peeled off due to a temperature load during actual use hardly occurs.
- the surface of the Ni plating is further subjected to amorphous Ni alloy plating having a film thickness of 0.5 to 6.5 ⁇ m.
- amorphous Ni alloy plating is performed by electroplating, a plating film is not formed on the diamond particles exposed on the side surface, and pinholes (unplated portions) are generated. Therefore, electroless plating is preferable.
- the amorphous Ni alloy plating in this case is preferably an alloy plating containing 5 to 15% by mass of Ni and phosphorus (P).
- the film thickness of the amorphous Ni alloy plating is 0.5 ⁇ m or more, pinholes (unplated portions) of the plating film are unlikely to occur, and if it is 6.5 ⁇ m or less, the residual stress generated in the plating film is Without increasing, the plating film is less likely to swell, peel off or crack due to the temperature load during actual use.
- the amorphous Ni alloy plating layer preferably has a thickness of 0.5 ⁇ m to 2 ⁇ m.
- the thermal expansion between the surface layer mainly composed of aluminum and the plating film is accompanied by an increase in the junction temperature and an increase in the temperature load during actual use. Swelling may occur due to the difference, but by forming a Ni plating layer with a smaller thermal expansion difference from the surface layer mainly composed of aluminum than the amorphous Ni alloy plating layer, swelling due to temperature load during actual use Can be suppressed. Further, the total thickness of the Ni plating layer and the amorphous Ni alloy plating layer is preferably thinner, specifically, 1.0 ⁇ m to 10 ⁇ m. Within this range, the occurrence of swelling and pinholes during actual use is suppressed.
- the composite of this embodiment it is preferable to apply Au plating with a film thickness of 0.05 ⁇ m to 4 ⁇ m to the outermost surface by electroplating or electroless plating. If the plating film thickness of Au plating is 0.05 ⁇ m or more, bonding is sufficient and there are no restrictions on characteristics, but it is preferable that the film thickness is 4 ⁇ m or less from the viewpoint of cost.
- the composite of this embodiment has a thermal conductivity of 350 W / mK or more when the temperature of the composite is 25 ° C., and a thermal expansion coefficient of 4 to 10 ⁇ 10 ⁇ 6 / K from 25 ° C. to 150 ° C. It is preferable that If the thermal conductivity at 25 ° C. is 350 W / mK or more and the thermal expansion coefficient from 25 ° C. to 150 ° C. is 4 to 10 ⁇ 10 ⁇ 6 / K, it has high thermal conductivity and low expansion equivalent to that of a semiconductor device. Become a rate.
- a heat radiating component such as a heat sink
- it has excellent heat radiating characteristics, and even when subjected to a temperature change, the difference in coefficient of thermal expansion between the semiconductor element and the heat radiating component is small, so that the destruction of the semiconductor element can be suppressed.
- it is preferably used as a highly reliable heat dissipation component.
- the composite of this embodiment has a high thermal conductivity and a low thermal expansion coefficient equivalent to that of a semiconductor element, and is suitable as a heat radiation component for a semiconductor laser element or a high-frequency element such as GaN, GaAs, or SiC that requires a high output. .
- it is suitable as a heat dissipation component for GaN-HEMT elements and GaAs-HEMT elements that are high-frequency elements.
- the composite according to the above embodiment has a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element, and can be easily formed into a predetermined shape or a hole or a notch. For this reason, it is preferably used as a heat dissipation component such as a heat sink for heat dissipation.
- Examples 1 to 6, Comparative Examples 1 and 2 Commercially available high-purity diamond powder A (Diamond Innovation Co./average particle size: 150 ⁇ m) and high-purity diamond powder B (Diamond Innovation Co./average particle size: 10 ⁇ m) are mixed in a mass ratio of 7 to 3.
- the mixed powder and aluminum powder manufactured by Alcoa / average particle size: 25 ⁇ m
- the volume distribution has a first peak at 10 ⁇ m and a second peak at 150 ⁇ m.
- the ratio of the area of the 205 ⁇ m volume distribution was 3 to 7.
- the particle size distribution was measured by adding each diamond powder to pure water to prepare a slurry to obtain a measurement solution.
- the refractive index of water was 1.33
- the refractive index of diamond was 2.42
- a spectrophotometer (Beckman Coulter, Inc.). Manufactured by Coulter LS230).
- a cast iron mold A8 (outer dimension: 250 ⁇ 200 ⁇ 50 mm, inner dimension: 25.0 ⁇ 25.0 ⁇ 50 mm) and mold B9 (lower part: 250 ⁇ 200 ⁇ 20 mm, upper part) shown in FIG. : 24.9 ⁇ 24.9 ⁇ 10 mm) after applying graphite and boron nitride as mold release agents, and then laminating them and placing pure aluminum foil (100 ⁇ m) on the surfaces of molds B and C, and mold B9 Then, a mold release graphite sheet was placed between the mold C10 and the pure aluminum foil to produce a molded body of the mixed powder and the aluminum foil. Similarly, a mold C10 (24.9 ⁇ 24.9 ⁇ 60 mm) coated with a release agent was laminated, and preformed with a hydraulic press at a surface pressure of 50 MPa.
- this laminate was heated in an electric furnace to a temperature of 610 ° C. in an air atmosphere and held for 15 minutes, so that the temperature of the laminate was 610 ° C.
- the heated laminate was heat-molded with a hydraulic press at a surface pressure of 250 MPa for 5 minutes through a 5 mm thick heat insulating material, and then the pressure was released and cooled to room temperature.
- the mold B9 is removed, the mold C10 is pushed in with a hydraulic press, the molded body is taken out, and then the graphite sheet arranged for mold release is peeled off to form a stepped 25 ⁇ 25 ⁇ 2 mm composite. Obtained.
- Table 2 shows the results of measuring the density of the obtained composite by the Archimedes method and calculating the relative density (density measurement value / theoretical density ⁇ 100). In Comparative Example 2, since aluminum leaked from the mold during pressing and the ratio of diamond to aluminum was changed, no subsequent measurement was performed.
- the surface of the composite according to Examples 1 to 4 was 6 ⁇ m thick ( A plating layer of Ni: 2.0 ⁇ m + Ni-P: 2.0 ⁇ m + Au: 2.0 ⁇ m was formed.
- the solder wet spread rate was 80% or more in all plated products.
- the peel strength of the obtained plated product it was 98 N / cm or more in all the plated products.
- the obtained plated product was subjected to a heat treatment at a temperature of 400 ° C. for 10 minutes in an air atmosphere, and as a result of observing the plated surface, no abnormality such as swelling was observed.
- the composites according to Examples 1 to 6 have high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element. Further, when the composite is produced by such a method, the cost can be reduced as compared with a case where a flat plate-like composite is produced by a molten metal forging method or the like and shaped by water jet machining or laser machining.
- Examples 7 and 8, Comparative Examples 3 and 4 Commercially available high purity diamond powder A (Diamond Innovation Co./average particle size: 150 ⁇ m), high purity diamond powder B (Diamond Innovation Co./average particle size: 10 ⁇ m) and aluminum powder (Alcoa Co./average) A composite was produced in the same manner as in Example 1 except that the particle size was 25 ⁇ m) with the blending ratio shown in Table 3.
- the volume distribution has a first peak at 10 ⁇ m and a second peak at 150 ⁇ m.
- the ratio of the area of the volume distribution of 205 ⁇ m was the value shown in Table 3.
- the particle size distribution was measured by adding each diamond powder to pure water to prepare a slurry to obtain a measurement solution.
- the refractive index of water was 1.33
- the refractive index of diamond was 2.42
- a spectrophotometer (Beckman Coulter, Inc.). Manufactured by Coulter LS230).
- the obtained composite was evaluated for the same characteristics as in Example 1. The results are shown in Table 4. In Comparative Examples 3 and 4, the thermal conductivity was low and the thermal expansion coefficient was large.
- a cast iron mold A (outer dimension: 250 ⁇ 200 ⁇ 50 mm, inner dimension: 25.0 ⁇ 25.0 ⁇ 50 mm) and mold D (lower part: 250 ⁇ 200 ⁇ 20 mm, upper part shown in FIG. : 24.9 ⁇ 24.9 ⁇ 10 mm) after applying graphite and boron nitride as mold release agents, and then laminating them and placing a pure aluminum foil (100 ⁇ m) on the surface of the mold D and E side. Then, a mold release graphite sheet was placed between the mold E and the pure aluminum foil to prepare a molded body of the mixed powder and the aluminum foil. Similarly, a mold E (24.9 ⁇ 24.9 ⁇ 60 mm) coated with a release agent was laminated and pre-molded with a hydraulic press at a surface pressure of 50 MPa.
- this laminate was heat-molded in an electric furnace in an air atmosphere under the conditions shown in Table 5, and then the pressure was released to cool to room temperature.
- the mold D is removed, the mold E is pushed in with a hydraulic press, the molded product is taken out, and then the graphite sheet arranged for mold release is peeled off to form a complex 25 ⁇ 25 ⁇ 2 mm composite. Obtained.
- Example 6 The composites according to Examples 9 to 14 have a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element.
- Comparative Example 5 aluminum leaked from the mold during pressing, and the ratio between diamond and aluminum was changed.
- Comparative Examples 6, 7, and 9 the thermal conductivity was low and the thermal expansion coefficient was large, so that characteristics suitable for this application could not be obtained.
- Comparative Examples 8 and 10 characteristics suitable for this application were obtained, but it was found that chipping and deformation of the mold were observed and the productivity was not excellent.
- the cost can be reduced as compared with a case where a flat plate-like composite is produced by a molten metal forging method or the like and shaped by water jet machining or laser machining.
- Example 15 to 17 Comparative Examples 11 to 14
- a composite was prepared in the same manner as in Example 1 except that 55% by volume of a commercially available mixed powder of high-purity diamond powder and 45% by volume of aluminum powder (Alcoa / average particle size: 25 ⁇ m) were mixed. did.
- Table 7 shows the results of the particle size distribution measurement of the used diamond powder and mixed powder.
- Example 15 to 17 the obtained composite body performed the characteristic evaluation similar to Example 1.
- FIG. 8 The results are shown in Table 8. It can be seen that the composites according to Examples 15 to 17 have a high thermal conductivity and a thermal expansion coefficient close to that of a semiconductor element.
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Abstract
Description
本明細書において、「~」という記号は「以上」及び「以下」を意味する。例えば、「A~B」というのは、A以上でありB以下であるという意味である。
本明細書において、「両面」とは、平板状の部材について、表面および裏面の両方の面を意味する。また本明細書において、「側面部」とは、平板状の部材について、上記両面の周囲をめぐり、両面に対して略垂直の部分を意味する。また、本明細書において、「穴部」とは、本実施形態の部品を他の放熱部材にネジ止めするために設ける、平板状の複合体の上下面を貫くように加工される貫通穴を意味する。
本実施形態の複合体は、粒子径の体積分布の第一ピークが5~25μmにあり、第二ピークが55~195μmにあり、粒子径が1~35μmである体積分布の面積と粒子径が45~205μmである体積分布の面積との比率が1対9から4対6であるダイヤモンド粉末50体積%~80体積%と金属粉末20体積%~50体積%との混合粉末を加圧成型して得られる。
以下に、本実施形態の複合体の製造方法を説明する。本実施形態における複合体は、ダイヤモンド粉末と金属粉末とを含む原料を所定の温度及び圧力にて加圧成形することによって得られる。
原料であるダイヤモンド粉末は、天然ダイヤモンド粉末もしくは人造ダイヤモンド粉末のいずれも使用することができる。また、該ダイヤモンド粉末には、必要に応じて、例えばシリカ等の結合材を添加してもよい。結合材を添加することにより、成形体を形成することができるという効果を得ることができる。
原料として用いる金属粉末は、アルミニウム粉末、アルミニウム合金粉末又は、アルミニウムとアルミニウム以外の金属の混合粉末のいずれかが好ましい。
珪素成分が20質量%以下であれば、得られる合金の熱伝導率が低下せず、得られる複合体の熱伝導率が低下しない。マグネシウム成分は、得られる合金と炭化珪素の密着性を向上させる効果があり、3質量%以下であれば、複合化時に炭化アルミニウム(Al4C3)を生成し難く、熱伝導率、強度の面で好ましい。また、1質量%以下であれば、熱伝導率が低下しないため、ニッケル、コバルト、銅、チタン、鉄等のその他の金属が含まれてもよい。
金属粉末の含有量が20体積%以上であれば、加熱プレス成形時の金属粉末量が十分であり、複合体の緻密化が十分となる。金属粉末の含有量が50体積%以下であれば、緻密な複合体を得ることができ、複合体の熱膨張係数が抑制される。
また、加熱プレス成形時の加熱段階で除去可能なものであれば、必要に応じて保形用バインダー等の使用が可能である。
金型の構造については、成形時に複合体の外形を決定する中型と上下のパンチから構成されることが好ましい。
予備成形時の圧力が10MPa以上であれば、緻密化が十分となる。プレス圧の上限については特性面からの制約はないが、金型の強度、装置の力量より300MPa以下が好ましい。加圧時間を1分以上とすることで緻密化が十分となる。また加圧時間の上限については特性面からの制約はないが、装置および金型の故障の可能性や生産効率を考慮して30分以下が好ましい。
切欠きが設けられた複合体の形成方法として、例えば目的形状の下パンチが設けられた金型D(図7又は図8の13)と下パンチの形状と同形状のスリットが設けられた金型E(図7の14)とを用いることができる。
このため、ピンは金型にネジ止め等の脱着可能な方式で固定した方が摩耗した際、交換が容易であるため好ましい。ピン径については、ピンに使用する材質の熱膨張係数を考慮し、加熱成形時のピンの熱膨張係数と複合体の熱膨張係数における冷却時の穴の収縮量とで設計する必要がある。
アニール時間が10分以上であれば、上記のアニール温度で複合体内部の歪みが十分に開放され、熱膨張係数および寸法が変化することを抑制できる。上記条件を満たす場合は、加圧成形後にそのまま冷却を行っても十分なアニール効果が得られる。
本実施形態の複合体を放熱部品として用いる場合、図1に示すように、複合化部(図1の3)、複合化部3の両面に設けられた、表面層4、Ni層5、アモルファスのNi合金層6及びAu層7からなる表面金属層2を備える放熱部品1とすることができる。
複合体の片面又は両面の表面がアルミニウムを主成分とする表面層で覆われていると、複合体をめっき処理するのに好適である。
この表面層の材料としては、複合体と密着しやすいアルミニウム、又はアルミニウム合金が好ましく、0.01mm~1mmの厚みのアルミニウム、又はアルミニウム合金の箔または板をそれらの融点より100K低い温度~融点未満の温度で加圧成形することで、複合体の表面に複合化することができる。
本実施形態の複合体を半導体素子のヒートシンクとして用いる場合、ロウ付けにより半導体素子と接合して用いられることが多い。よって、複合体の接合表面には、金属層を設けることが好ましい。金属層の形成方法としては、めっき法、蒸着法、スパッタリング法等の方法を採用することができる。費用の面からはめっき法による処理が好ましく、以下では、めっき法による処理について説明する。
めっき法は、電気めっき処理法が好ましいが、結晶質のNiめっき膜が得られるのであれば、無電解めっき処理法を適用することもできる。
ピール強度が5kgf/cm以上であれば、半導体素子の放熱部品として用いる場合、実使用時の温度負荷によりめっき層が剥離する問題が生じにくい。
この場合のアモルファスのNi合金めっきは、Niとリン(P)を5~15質量%含有する合金めっきが好ましい。アモルファスのNi合金めっきの膜厚が0.5μm以上であれば、めっき膜のピンホール(めっき未着部分)が発生しにくく、6.5μm以下であれば、めっき膜中に発生する残留応力が増加することなく、実使用時の温度負荷により、めっき膜の膨れ、剥離やクラック発生などが生じにくい。
さらにNiめっき層とアモルファスのNi合金めっき層の合計厚みはより薄いものが好ましく、具体的には1.0μm~10μmであることが好ましい。この範囲であれば、実使用時の膨れやピンホールの発生が抑制される。
25℃での熱伝導率が350W/mK以上であり、25℃から150℃の熱膨張係数が4~10×10-6/Kであれば、高熱伝導率かつ半導体素子と同等レベルの低膨張率となる。そのため、ヒートシンク等の放熱部品として用いた場合、放熱特性に優れ、また、温度変化を受けても半導体素子と放熱部品との熱膨張率の差が小さいため、半導体素子の破壊を抑制できる。その結果、高信頼性の放熱部品として好ましく用いられる。
市販されている高純度のダイヤモンド粉末A(ダイヤモンドイノベーション社製/平均粒径:150μm)と高純度のダイヤモンド粉末B(ダイヤモンドイノベーション社製/平均粒子径:10μm)を7対3の質量比で混合した混合粉末とアルミニウム粉末(アルコア社製/平均粒子径:25μm)を表1に示す配合比で混合した。
ダイヤモンド粉末Aとダイヤモンド粉末Bの混合粉末の粒度分布測定を行った結果、体積分布において10μmに第一ピーク、150μmに第二ピークを持ち、体積分布における1~35μmの体積分布の面積と45~205μmの体積分布の面積の比率が3対7であった。粒度分布の測定は、純水に各ダイヤモンド粉末を加えスラリーを作製して測定溶液とし、水の屈折率を1.33、ダイヤモンドの屈折率を2.42として、分光光度計(ベックマン・コールター社製:コールターLS230)により測定した。
同様に離型剤を塗布した金型C10(24.9×24.9×60mm)を積層し、油圧プレスにて面圧:50MPaで予備成形を実施した。
次に、金型B9を外し、油圧プレスにて金型C10を押し込み、成形体を取り出した後、離型用に配置した黒鉛シートを剥がして、段付きの25×25×2mmの複合体を得た。
比較例2では、プレス時に金型よりアルミニウムが漏れ出しており、ダイヤモンドとアルミニウムの比率が変化しているため、この後の測定は行わなかった。
得られためっき品について、JIS Z3197に準じて半田ぬれ広がり率の測定を行った結果、全てのめっき品で、半田ぬれ広がり率は80%以上であった。また、得られためっき品のピール強度を測定した結果、全てのめっき品で98N/cm以上であった。更に、得られためっき品は、大気雰囲気下、温度400℃で10分間の加熱処理を行った後、めっき表面を観察した結果、膨れ等の異常は認められなかった。
市販されている高純度のダイヤモンド粉末A(ダイヤモンドイノベーション社製/平均粒径:150μm)と高純度のダイヤモンド粉末B(ダイヤモンドイノベーション社製/平均粒子径:10μm)とアルミニウム粉末(アルコア社製/平均粒子径:25μm)を表3に示す配合比で混合したこと以外は実施例1と同様の方法で複合体を作製した。
ダイヤモンド粉末Aとダイヤモンド粉末Bの混合粉末の粒度分布測定を行った結果、体積分布において10μmに第一ピーク、150μmに第二ピークを持ち、体積分布における1~35μmの体積分布の面積と45~205μmの体積分布の面積の比率は表3に示す値であった。粒度分布の測定は、純水に各ダイヤモンド粉末を加えスラリーを作製して測定溶液とし、水の屈折率を1.33、ダイヤモンドの屈折率を2.42として、分光光度計(ベックマン・コールター社製:コールターLS230)により測定した。
市販されている高純度のダイヤモンド粉末A(ダイヤモンドイノベーション社製/平均粒子径:150μm)、高純度のダイヤモンド粉末B(ダイヤモンドイノベーション社製/平均粒子径:10μm)を7:3の質量比で混合した混合粉末とアルミニウム粉末(アルコア社製/平均粒子径:25μm)を実施例1と同様の比率(ダイヤモンド粉末:アルミニウム粉末=61:39)で混合した。
同様に離型剤を塗布した金型E(24.9×24.9×60mm)を積層し、油圧プレスにて面圧:50MPaで予備成形を実施した。
市販されている高純度のダイヤモンド粉末の混合粉末55体積%とアルミニウム粉末(アルコア社製/平均粒子径:25μm)45体積%を混合したこと以外は実施例1と同様の方法で複合体を作製した。使用したダイヤモンド粉末と混合粉末の粒度分布測定を行った結果を表7に示す。
実施例15~17に係る複合体は、高熱伝導率及び半導体素子に近い熱膨張係数を有していることがわかる。
2 表面金属層
3 複合体
4 表面層
5 Ni層
6 アモルファスのNi合金層
7 Au層
8 金型A
9 金型B
10 金型C
11 金属粉末とダイヤモンド粉末の混合粉末
12 黒鉛シート
13 金型D
14 金型E
Claims (5)
- 粒子径の体積分布の第一ピークが5~25μmにあり、第二ピークが55~195μmにあり、粒子径が1~35μmである体積分布の面積と粒子径が45~205μmである体積分布の面積との比率が1対9から4対6であるダイヤモンド粉末50体積%~80体積%と金属粉末20体積%~50体積%との混合粉末を加圧成型して得られる複合体。
- 前記金属粉末が、アルミニウム粉末、アルミニウム合金粉末又はアルミニウムとアルミニウム以外の金属からなる混合粉末である請求項1に記載の複合体。
- 請求項1又は2に記載の複合体の表面に、(1)膜厚が0.5~6.5μmのNi層、(2)膜厚が0.5~6.5μmのアモルファスのNi合金層、(3)膜厚が0.05~4μmのAu層からなる金属層が順次形成され、Ni層とアモルファスのNi合金層の膜厚の合計が1.0~10μmであることを特徴とする半導体素子用放熱部品。
- 粒子径の体積分布の第一ピークが5~25μmにあり、第二ピークが55~195μmにあり、粒子径が1~35μmである体積分布の面積と粒子径が45~205μmである体積分布の面積との比率が1対9から4対6であるダイヤモンド粉末50体積%~80体積%と金属粉末20体積%~50体積%との混合粉末を金型に充填する工程と、
混合粉末を300℃以上660℃未満の温度に加熱する工程と、
成形圧力10~300MPa、加圧時間1~30分間で加圧成型する工程とを含む複合体の製造方法。 - 前記金属粉末が、アルミニウム粉末、アルミニウム合金粉末又はアルミニウムとアルミニウム以外の金属からなる混合粉末である請求項4に記載の複合体の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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US15/318,138 US10358704B2 (en) | 2014-07-03 | 2015-07-03 | Composite body and method for manufacturing same |
JP2016531468A JP6584399B2 (ja) | 2014-07-03 | 2015-07-03 | 複合体とその製造方法 |
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CN107245595A (zh) * | 2017-05-31 | 2017-10-13 | 北京科技大学 | 一种制备具有负膨胀系数鳞片石墨/Cu复合材料的方法 |
WO2018123380A1 (ja) * | 2016-12-28 | 2018-07-05 | デンカ株式会社 | 半導体素子用放熱部品 |
CN113210609A (zh) * | 2021-04-14 | 2021-08-06 | 中国电子科技集团公司第二十九研究所 | 一种热膨胀系数局部可调的一体化微波盒体封装方法 |
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WO2017065139A1 (ja) * | 2015-10-13 | 2017-04-20 | デンカ株式会社 | アルミニウム-ダイヤモンド系複合体及びその製造方法 |
JP7104620B2 (ja) * | 2016-03-15 | 2022-07-21 | デンカ株式会社 | アルミニウム-ダイヤモンド系複合体及び放熱部品 |
CN111804919B (zh) * | 2019-04-10 | 2022-06-17 | 中国科学院宁波材料技术与工程研究所 | 高导热石墨-金属复合材料及其制备方法 |
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CN113210609A (zh) * | 2021-04-14 | 2021-08-06 | 中国电子科技集团公司第二十九研究所 | 一种热膨胀系数局部可调的一体化微波盒体封装方法 |
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JPWO2016002925A1 (ja) | 2017-05-25 |
JP6584399B2 (ja) | 2019-10-02 |
US10358704B2 (en) | 2019-07-23 |
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