WO2017115831A1 - カーボンナノチューブ接合シートおよびカーボンナノチューブ接合シートの製造方法 - Google Patents
カーボンナノチューブ接合シートおよびカーボンナノチューブ接合シートの製造方法 Download PDFInfo
- Publication number
- WO2017115831A1 WO2017115831A1 PCT/JP2016/089030 JP2016089030W WO2017115831A1 WO 2017115831 A1 WO2017115831 A1 WO 2017115831A1 JP 2016089030 W JP2016089030 W JP 2016089030W WO 2017115831 A1 WO2017115831 A1 WO 2017115831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet
- carbon nanotube
- array sheet
- cnt array
- cnt
- Prior art date
Links
Images
Classifications
-
- 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
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
- B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
-
- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- 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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- 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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0036—Heat treatment
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/27—Manufacturing methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L24/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- 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
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/80—Sintered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2202/00—Structure or properties of carbon nanotubes
- C01B2202/20—Nanotubes characterized by their properties
- C01B2202/24—Thermal properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/27—Manufacturing methods
- H01L2224/27001—Involving a temporary auxiliary member not forming part of the manufacturing apparatus, e.g. removable or sacrificial coating, film or substrate
- H01L2224/27003—Involving a temporary auxiliary member not forming part of the manufacturing apparatus, e.g. removable or sacrificial coating, film or substrate for holding or transferring the layer preform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/27—Manufacturing methods
- H01L2224/275—Manufacturing methods by chemical or physical modification of a pre-existing or pre-deposited material
- H01L2224/27505—Sintering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
- H01L2224/29001—Core members of the layer connector
- H01L2224/29099—Material
- H01L2224/291—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/29138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
- H01L2224/29001—Core members of the layer connector
- H01L2224/29099—Material
- H01L2224/291—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/29163—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than 1550°C
- H01L2224/29166—Titanium [Ti] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
- H01L2224/29001—Core members of the layer connector
- H01L2224/29099—Material
- H01L2224/29193—Material with a principal constituent of the material being a solid not provided for in groups H01L2224/291 - H01L2224/29191, e.g. allotropes of carbon, fullerene, graphite, carbon-nanotubes, diamond
-
- 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
- H01L2924/01—Chemical elements
- H01L2924/01014—Silicon [Si]
Definitions
- the present invention relates to a carbon nanotube bonding sheet and a method for producing the carbon nanotube bonding sheet.
- a heat conductive material (Thermal Interface Material: hereinafter referred to as TIM) is arranged between the electronic component and the heat sink to reduce the gap between the electronic component and the heat sink, thereby reducing the heat generated from the electronic component. It is known to conduct efficiently to a heat sink.
- a TIM a polymer sheet made of a polymer material, silicone grease, and the like are known.
- the polymer sheet cannot sufficiently follow the fine irregularities (surface roughness) on the surface of the electronic component and the heat sink, and the fine irregularities cause a gap between the electronic component and the heat sink. There is a limit to improving the thermal conductivity.
- Silicone grease can follow fine irregularities on the surface of the electronic component and the heat sink, but may be pumped out (flowed out between the electronic component and the heat sink) due to repeated temperature changes. It is difficult to ensure the heat conduction performance of the TIM over a long period of time.
- CNT Carbon nanotubes
- thermal interface pad including a substrate and CNTs arranged in an array on both surfaces of the substrate has been proposed (see, for example, Patent Document 1).
- Such a thermal interface pad is manufactured by growing CNTs on both sides of a substrate by chemical vapor deposition.
- the CNTs since the CNTs are arranged on both sides of the substrate, the CNTs can follow the fine irregularities on the surfaces of the electronic component and the heat sink.
- the thermal interface pad described in Patent Document 1 is manufactured by growing CNTs on both surfaces of the substrate by chemical vapor deposition, it is not possible to sufficiently secure the adhesive strength between the substrate and the CNTs. Therefore, when the thermal interface pad is used as a TIM, the CNT may fall off the substrate. In this case, it is difficult to ensure the thermal conductivity performance of the thermal interface pad, and the dropped CNT may cause a short circuit of an electronic component or the like.
- an object of the present invention is to provide a carbon nanotube bonded sheet and a method of manufacturing the carbon nanotube bonded sheet that can suppress the falling of the carbon nanotube while being able to follow the fine irregularities on the surface of the object. is there.
- the present invention [1] includes a carbon nanotube bonding sheet comprising a fixed sheet formed of an inorganic sintered body and a carbon nanotube array sheet bonded to the sintered body of the fixed sheet. It is out.
- the carbon nanotube bonding sheet includes the carbon nanotube array sheet
- the plurality of CNTs of the carbon nanotube array sheet are attached to the surface of the target object. It is possible to follow fine irregularities.
- the carbon nanotube array sheet is bonded to the sintered body of the fixed sheet, it is possible to suppress the CNTs included in the carbon nanotube array sheet from dropping from the fixed sheet.
- the inorganic substance includes silicon and / or titanium, and the sintered body is sintered between carbon included in the carbon nanotube array sheet and silicon and / or titanium included in the fixed sheet.
- the sintered body includes a sintered body of carbon included in the carbon nanotube array sheet and silicon and / or titanium included in the fixing sheet, the carbon nanotube array sheet and the sintered body are sintered.
- the affinity with the body can be improved, and the carbon nanotube array sheet can be reliably bonded to the sintered body. Therefore, it is possible to reliably suppress the CNT included in the carbon nanotube array sheet from falling off the fixed sheet.
- the present invention [3] includes the carbon nanotube bonding sheet according to the above [1] or [2], wherein an end portion of the carbon nanotube array sheet bonded to the sintered body is embedded in the sintered body. It is out.
- the present invention [4] includes the carbon nanotube bonding sheet according to any one of the above [1] to [3], wherein an average bulk density of the carbon nanotube array sheet is 50 mg / cm 3 or more. .
- the average bulk density of the carbon nanotube array sheet is not less than the above lower limit, it is possible to improve the thermal conductivity of the carbon nanotube array sheet, and consequently the thermal conductivity of the carbon nanotube bonded sheet. Can be improved.
- the carbon nanotube array sheet peeled from the growth substrate is bonded to the sintered body of the fixed sheet, the carbon nanotube array sheet is peeled off from the growth substrate and then densified. Can be processed. Therefore, the average bulk density of the carbon nanotube array sheet can be set to the above lower limit or more.
- the present invention [5] includes a step of preparing a fixed sheet formed of an inorganic sintered body, a step of growing vertically aligned carbon nanotubes on a growth substrate, and peeling the vertically aligned carbon nanotubes from the growth substrate.
- the carbon nanotubes are fired by firing them.
- the array sheet can be firmly bonded to the fixed sheet.
- a carbon nanotube bonding sheet including a carbon nanotube array sheet to be bonded to a sintered body of a fixed sheet can be efficiently manufactured with a simple method.
- the present invention [6] includes a step of preparing a resin sheet containing inorganic particles, a step of growing vertically aligned carbon nanotubes on a growth substrate, a step of peeling the vertically aligned carbon nanotubes from the growth substrate, and a carbon nanotube array A step of forming a sheet, a step of disposing the carbon nanotube array sheet on the resin sheet, and a step of firing the resin sheet on which the carbon nanotube array sheet is disposed in a vacuum or an inert atmosphere. Including a method for producing a carbon nanotube bonding sheet.
- the carbon nanotube array sheet peeled from the growth substrate is placed on a resin sheet containing inorganic particles and then baked, whereby the inorganic particles can be made into a sintered body and fixed.
- a sheet can be formed.
- a carbon nanotube array sheet can be joined with the sintered compact of a fixed sheet.
- a carbon nanotube bonding sheet including a carbon nanotube array sheet to be bonded to a sintered body of a fixed sheet can be efficiently manufactured with a simple method.
- the present invention [7] includes a step of growing vertically aligned carbon nanotubes on a growth substrate, a step of peeling the vertically aligned carbon nanotubes from the growth substrate to form a carbon nanotube array sheet, and the carbon nanotube array sheet, Including a step of applying a paste containing inorganic particles, and a step of firing the carbon nanotube array sheet to which the paste has been applied in a vacuum or under an inert atmosphere. Yes.
- the inorganic particles after applying the paste containing inorganic particles to the carbon nanotube array sheet peeled from the growth substrate, the inorganic particles can be made into a sintered body by firing, and the fixed sheet Can be formed. And a carbon nanotube array sheet can be joined with the sintered compact of a fixed sheet.
- a carbon nanotube bonding sheet including a carbon nanotube array sheet to be bonded to a sintered body of a fixed sheet can be efficiently manufactured with a simple method.
- the carbon nanotube bonding sheet of the present invention can follow the fine irregularities on the surface of the object and can prevent CNTs from falling off.
- the method for producing a carbon nanotube bonding sheet of the present invention is a simple method, but can efficiently produce the above-mentioned carbon nanotube bonding sheet.
- FIG. 1A is a side view of a thermally conductive sheet as a first embodiment of a carbon nanotube bonding sheet of the present invention.
- FIG. 1B is a schematic configuration diagram illustrating a state in which the thermally conductive sheet illustrated in FIG. 1A is disposed between the electronic component and the heat sink.
- FIG. 2A is an explanatory diagram for explaining an embodiment of a process of growing vertically aligned carbon nanotubes (VACNTs) on a growth substrate, and shows a process of forming a catalyst layer on the substrate.
- FIG. 2B shows a process of heating the substrate to agglomerate the catalyst layer into a plurality of granules following FIG. 2A.
- FIG. 2C shows a process of preparing VACNTs by supplying a raw material gas to a plurality of granular bodies and growing a plurality of carbon nanotubes, following FIG. 2B.
- FIG. 3A is an explanatory diagram for explaining a process of peeling VACNTs, and shows a process of cutting VACNTs from the growth substrate.
- FIG. 3B shows a process of peeling VACNTs from the growth substrate to obtain a carbon nanotube array sheet (CNT array sheet) following FIG. 3A.
- FIG. 3C is a perspective view of the CNT array sheet shown in FIG. 3B.
- FIG. 4A is an explanatory diagram for explaining a process of densifying the CNT array sheet shown in FIG.
- FIG. 3C shows a process of housing the CNT array sheet in a heat-resistant container.
- FIG. 4B shows a process of densifying the CNT array sheet by heating the CNT array sheet, following FIG. 4A.
- FIG. 4C shows a process of forming a metal thin film on the densified CNT array sheet shown in FIG. 4B and disposing it on both the front and back surfaces of the fixed sheet.
- FIG. 5A shows a process of arranging the densified CNT array sheet shown in FIG. 4B on both the front and back surfaces of the resin sheet.
- FIG. 5B shows a process of applying a paste to the densified CNT array sheet shown in FIG. 4B to form a paste layer.
- FIG. 4B shows a process of densifying the CNT array sheet by heating the CNT array sheet, following FIG. 4A.
- FIG. 4C shows a process of forming a metal thin film on the densified CNT array sheet shown in FIG. 4B and disposing it on both the
- FIG. 5C shows a process of arranging the CNT array sheet on the surface of the paste layer following FIG. 5B.
- FIG. 6 is a side view of a thermally conductive sheet as a second embodiment of the carbon nanotube bonding sheet of the present invention.
- FIG. 7A is an explanatory diagram for explaining a process of mechanically densifying the VACNTs shown in FIG. 2C, and shows a process of arranging a pressing plate so as to sandwich the VACNTs.
- FIG. 7B shows a process of compressing VACNTs by a pressing plate following FIG. 7A.
- the carbon nanotube bonding sheet of the present invention (hereinafter referred to as a CNT bonding sheet) includes a fixed sheet formed from an inorganic sintered body, and a carbon nanotube array sheet bonded to the fixed sheet sintered body. I have.
- the carbon nanotube array sheet only needs to be bonded to the fixed sheet.
- the carbon nanotube array sheet is bonded to at least one of the front surface and the back surface of the fixed sheet.
- a thermally conductive sheet 1 (an example of a CNT bonded sheet) includes a fixed sheet 2 and two carbon nanotube array sheets 3 (hereinafter referred to as CNTs). Array sheet 3).
- the fixed sheet 2 has a sheet shape (flat plate shape). Specifically, the fixed sheet 2 has a predetermined thickness and is in a plane direction (longitudinal direction and lateral direction) orthogonal to the thickness direction. It has a flat front surface 2A (one surface in the thickness direction) and a flat back surface 2B (the other surface in the thickness direction).
- the thickness of the fixing sheet 2 is, for example, preferably 10 ⁇ m or more, more preferably 50 ⁇ m or more, for example, preferably 500 ⁇ m or less, and more preferably 300 ⁇ m or less.
- the fixing sheet 2 is formed from an inorganic sintered body.
- the fixed sheet 2 is a ceramic sheet formed by bonding inorganic particles to each other by sintering.
- FIG. 1A an inorganic sintered body is shown as a sintered body 4.
- inorganic substances include metals (eg, titanium, silicon, tungsten, etc.), inorganic oxides (eg, silica, alumina, titanium oxide, zinc oxide, magnesium oxide, etc.), inorganic nitrides (eg, aluminum nitride, boron nitride, etc.) , Silicon nitride, etc.) and inorganic carbides (eg, silicon carbide, titanium carbide, tungsten carbide, etc.).
- metals eg, titanium, silicon, tungsten, etc.
- inorganic oxides eg, silica, alumina, titanium oxide, zinc oxide, magnesium oxide, etc.
- inorganic nitrides eg, aluminum nitride, boron nitride, etc.
- Silicon nitride, etc. silicon carbide, titanium carbide, tungsten carbide, etc.
- Such inorganic substances can be used alone or in combination of two or more.
- the inorganic carbide preferably includes inorganic carbide containing silicon and / or titanium, that is, silicon carbide and titanium carbide.
- the fixed sheet 2 has electrical insulation, and the electric resistance (conductive resistance) in the thickness direction of the fixed sheet 2 is preferably 10 3 ⁇ or more, for example, at 25 ° C., preferably 10 4 ⁇ or more. More preferably, for example, it is preferably 10 8 ⁇ or less.
- the thermal conductivity of the fixed sheet 2 is preferably 2 W / (m ⁇ K) or more, and more preferably 5 W / (m ⁇ K) or more in the thickness direction, for example.
- the CNT array sheet 3 is peeled from the growth substrate 15 (described later; see FIG. 3B), and is formed into a sheet shape from a plurality of carbon nanotubes 6 (hereinafter referred to as CNT 6). It is an aggregate of nanotubes.
- the plurality of CNTs 6 are oriented in the thickness direction of the CNT array sheet 3, and are not continuous in the thickness direction but continuous in the plane direction (vertical direction and horizontal direction). Are arranged in a sheet shape.
- a plurality of carbon nanotubes 6 (CNT6) oriented in a predetermined direction are continuously formed into a sheet shape in a direction perpendicular to the orientation direction of the carbon nanotubes 6. It is formed as follows.
- the CNT array sheet 3 maintains its shape so that the plurality of CNTs 6 are in contact with each other in the surface direction in a state where they are peeled off from the growth substrate 15 (described later). Moreover, the CNT array sheet 3 has flexibility. In addition, van der Waals force is acting between mutually adjacent CNT6 among several CNT6.
- CNT6 may be any of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes, and preferably multi-walled carbon nanotubes.
- the plurality of CNTs 6 may include only one of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes, and any two or more of single-walled carbon nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes May be included.
- the average outer diameter of CNT6 is, for example, preferably 1 nm or more, more preferably 5 nm or more, for example, preferably 100 nm or less, more preferably 50 nm or less, and 20 nm or less. Is particularly preferred.
- the average length (size in the average orientation direction) of CNT6 is, for example, preferably 10 ⁇ m or more, more preferably 50 ⁇ m or more, for example, preferably 1000 ⁇ m or less, and more preferably 500 ⁇ m or less. Preferably, it is especially preferable that it is 200 micrometers or less.
- the average outer diameter and average length of CNT are measured by well-known methods, such as observation with an electron microscope, for example.
- the average bulk density of the plurality of CNTs 6 is preferably, for example, 10 mg / cm 3 or more, more preferably 50 mg / cm 3 or more, and particularly preferably 100 mg / cm 3 or more. Preferably, for example, it is preferably 500 mg / cm 3 or less, more preferably 300 mg / cm 3 or less, and particularly preferably 200 mg / cm 3 or less.
- the average bulk density of CNT6 is, for example, the mass per unit area (weight per unit: mg / cm 2 ) and the average length of carbon nanotubes (SEM (manufactured by JEOL)) or non-contact film thickness meter (Keyence Corporation). Measured by).
- the G / D ratio of the CNT array sheet 3 is, for example, preferably 1 or more, more preferably 2 or more, particularly preferably 5 or more, and particularly preferably 10 or more. It is preferably 20 or less, and more preferably 15 or less.
- the G / D ratio is the ratio of the spectral intensity of a peak called G band observed near 1590 cm ⁇ 1 to the spectral intensity of a peak called D band observed near 1350 cm ⁇ 1 in the Raman spectrum of the carbon nanotube. It is.
- the spectrum of the D band is derived from the defects of the carbon nanotube, and the spectrum of the G band is derived from the in-plane vibration of the carbon six-membered ring.
- the electrical resistance (conductive resistance) in the thickness direction of the CNT array sheet 3 is, for example, preferably 1 ⁇ or less, more preferably 0.1 ⁇ or less at 25 ° C.
- the thermal conductivity of the CNT array sheet 3 is, for example, preferably 1 W / (m ⁇ K) or more in the thickness direction, more preferably 2 W / (m ⁇ K) or more, and 10 W / (m ⁇ K). K) or more, particularly preferably 30 W / (m ⁇ K) or more, for example, preferably 60 W / (m ⁇ K) or less, and 40 W / (m ⁇ K) or less. More preferably.
- the CNT array sheet 3 is supported by the fixed sheet 2 by bonding to the inorganic sintered body 4 on both the front surface 2A and the back surface 2B of the fixed sheet 2.
- the two CNT array sheets 3 are bonded to each of the front surface 2A and the back surface 2B of the fixed sheet 2, and are arranged so as to sandwich the fixed sheet 2 in the thickness direction.
- the CNT array sheet 3 bonded to the front surface 2A of the fixed sheet 2 is defined as the first CNT array sheet 3A, and the CNT array sheet 3 bonded to the back surface 2B of the fixed sheet 2 is used. Is a second CNT array sheet 3B.
- the end of the CNT array sheet 3 on the fixed sheet 2 side is embedded and bonded to the sintered body 4 of the fixed sheet 2, and the end of the CNT array sheet 3 opposite to the fixed sheet 2 is the free end. It has become. That is, the end portion of the CNT array sheet 3 to be joined with the sintered body 4 is embedded in the sintered body 4 of the fixed sheet 2.
- the other end portion of the first CNT array sheet 3A is embedded and bonded to the sintered body 4 on the surface 2A of the fixed sheet 2, and the one end portion of the first CNT array sheet 3A becomes a free end.
- one end portion of the second CNT array sheet 3B is embedded and bonded to the sintered body 4 on the back surface 2B of the fixed sheet 2, and the other end portion of the second CNT array sheet 3B is a free end.
- the thickness direction of the CNT array sheet 3 and the thickness direction of the fixed sheet 2 coincide with each other, and the CNT 6 of each CNT array sheet 3 extends along the thickness direction of the fixed sheet 2.
- the electrical resistance (conductive resistance) in the thickness direction of such a heat conductive sheet 1 is, for example, preferably 10 3 ⁇ or more, more preferably 10 4 ⁇ or more, for example, 10 7 ⁇ or less. Preferably, it is 10 6 ⁇ or less.
- the thermal conductivity of the heat conductive sheet 1 is, for example, preferably 1 W / (m ⁇ K) or more in the thickness direction, more preferably 2 W / (m ⁇ K) or more, and 10 W / (m More preferably KW or more, particularly preferably 25 W / (m ⁇ K) or more, particularly preferably 50 W / (m ⁇ K) or more, for example 300 W / (m ⁇ K). Or less, more preferably 100 W / (m ⁇ K) or less.
- a fixed sheet 2 formed from a sintered body of inorganic carbide is prepared (preparation step).
- a CNT array sheet 3 is prepared separately from the fixed sheet 2.
- vertically aligned carbon nanotubes 19 are grown on the growth substrate 15 by chemical vapor deposition (CVD).
- VACNTs19 is grown (CNT growth step).
- a growth substrate 15 is prepared.
- the growth substrate 15 is not specifically limited, For example, the well-known board
- Examples of the growth substrate 15 include a silicon substrate and a stainless steel substrate 16 on which a silicon dioxide film 17 is laminated, and preferably a stainless steel substrate 16 on which a silicon dioxide film 17 is laminated.
- 2A to 3C show the case where the growth substrate 15 is the stainless steel substrate 16 on which the silicon dioxide film 17 is laminated.
- a catalyst layer 18 is formed on the growth substrate 15, preferably on the silicon dioxide film 17.
- a metal catalyst is formed on the growth substrate 15 (preferably the silicon dioxide film 17) by a known film formation method.
- metal catalyst examples include iron, cobalt, nickel and the like, and preferably iron. Such metal catalysts can be used alone or in combination of two or more.
- film forming method examples include vacuum evaporation and sputtering, and preferably vacuum evaporation.
- the catalyst layer 18 is disposed on the growth substrate 15.
- the growth substrate 15 is the stainless steel substrate 16 on which the silicon dioxide film 17 is laminated
- the silicon dioxide film 17 and the catalyst layer 18 are formed of silicon dioxide as described in, for example, Japanese Patent Application Laid-Open No. 2014-94856.
- the mixed solution in which the precursor solution and the metal catalyst precursor solution are mixed is applied to the stainless steel substrate 16, and then the mixed solution is phase-separated and then dried to form the mixed solution at the same time.
- the growth substrate 15 on which the catalyst layer 18 is disposed is heated to, for example, 700 ° C. or more and 900 ° C. or less as shown in FIG. 2B. Thereby, the catalyst layer 18 aggregates and becomes the some granular body 18A.
- the source gas contains a hydrocarbon gas having 1 to 4 carbon atoms (lower hydrocarbon gas).
- hydrocarbon gas having 1 to 4 carbon atoms include methane gas, ethane gas, propane gas, butane gas, ethylene gas, acetylene gas and the like, and preferably acetylene gas.
- the raw material gas can contain hydrogen gas, inert gas (for example, helium, argon, etc.), water vapor, etc., if necessary.
- inert gas for example, helium, argon, etc.
- the supply time of the raw material gas is, for example, preferably 1 minute or more, more preferably 5 minutes or more, for example, preferably 60 minutes or less, and more preferably 30 minutes or less.
- a plurality of CNTs 6 grow from each of the plurality of granular bodies 18A as a starting point.
- FIG. 2C for convenience, it is described that one CNT6 grows from one granular body 18A.
- the present invention is not limited to this, and even if a plurality of CNT6 grow from one granular body 18A. Good.
- the plurality of CNTs 6 extend in the thickness direction (vertical direction) of the growth substrate 15 so as to be substantially parallel to each other on the growth substrate 15. That is, the plurality of CNTs 6 are oriented (orientated vertically) so as to be orthogonal to the growth substrate 15.
- VACNTs 19 grow on the growth substrate 15.
- the VACNTs 19 includes a plurality of rows 19A in which the plurality of CNTs 6 are linearly arranged in the vertical direction in the horizontal direction.
- the plurality of CNTs 6 are densely arranged in the surface direction (vertical direction and horizontal direction).
- the VACNTs 19 are peeled from the growth substrate 15 (peeling step).
- the cutting blade 20 is slid along the upper surface of the growth substrate 15, and the base ends (the growth substrate 15 side ends) of the plurality of CNTs 6 are collectively cut. To do. As a result, the VACNTs 19 are separated from the growth substrate 15.
- Examples of the cutting blade 20 include known metal blades such as a cutter blade and a razor, and preferably a cutter blade.
- the separated VACNTs 19 are pulled up from the growth substrate 15 as shown in FIG. 3B.
- the VACNTs 19 are peeled from the growth substrate 15 to form the CNT array sheet 3.
- two CNT array sheets 3, specifically, a first CNT array sheet 3A and a second CNT array sheet 3B are prepared.
- Such a CNT array sheet 3 can be used as it is for the heat conductive sheet 1, but since the average bulk density is relatively low, it is preferably densified from the viewpoint of improving the thermal conductivity. (Densification process).
- Examples of the densification process include a method of heat-treating the CNT array sheet 3 (see FIGS. 4A and 4B) and a method of supplying a volatile liquid to the CNT array sheet 3.
- the CNT array sheet 3 is accommodated in a heat-resistant container 45 and placed in a heating furnace.
- the heat-resistant container 45 is a heat-resistant container having a heat-resistant temperature exceeding 2600 ° C., and examples thereof include known heat-resistant containers such as a carbon container formed from carbon and a ceramic container formed from ceramics. Among such heat-resistant containers, a carbon container is preferable.
- the heating furnace examples include a resistance heating furnace, an induction heating furnace, a direct current electric furnace, and preferably a resistance heating furnace.
- the heating furnace may be a batch type or a continuous type.
- an inert gas is introduced into the heating furnace to replace the inside of the heating furnace with an inert gas atmosphere.
- an inert gas nitrogen, argon, etc. are mentioned, for example, Preferably argon is mentioned.
- the temperature in the heating furnace is raised to the heating temperature at a predetermined rate of temperature rise, and then left for a predetermined time while maintaining the temperature.
- the rate of temperature increase is, for example, preferably 1 ° C./min or more, more preferably 5 ° C./min or more, for example, preferably 40 ° C./min or less, and 20 ° C./min or less. More preferably.
- the heating temperature is, for example, preferably 2600 ° C. or higher, more preferably 2700 ° C. or higher, and particularly preferably 2800 ° C. or higher.
- the heating temperature is equal to or higher than the above lower limit, a plurality of CNTs 6 can be reliably gathered in the CNT array sheet 3.
- the heating temperature may be lower than the sublimation temperature of CNT6, and is preferably 3000 ° C. or lower. If heating temperature is below the said upper limit, it can suppress that CNT6 sublimes.
- the predetermined time is, for example, preferably 10 minutes or more, more preferably 1 hour or more, for example, preferably 5 hours or less, and more preferably 3 hours or less.
- the CNT array sheet 3 is preferably heat-treated in an unloaded state (a state where no load is applied to the CNT array sheet 3, that is, under atmospheric pressure).
- an unloaded state a state where no load is applied to the CNT array sheet 3, that is, under atmospheric pressure.
- the CNT array sheet 3 is placed in the heat-resistant container 45 so as to be spaced from the lid and side walls of the heat-resistant container 45. To house.
- the CNT array sheet 3 is heated.
- the crystallinity of graphene constituting the plurality of CNTs 6 in the CNT array sheet 3 is improved, and the orientation (linearity) of the CNTs 6 is improved.
- the CNTs 6 adjacent to each other are densely packed into a bundle shape while maintaining the orientation (linearity) by van der Waals force acting between them.
- the entire CNT array sheet 3 is uniformly densely packed, and the CNT array sheet 3 is densified. Thereafter, the CNT array sheet 3 is cooled (for example, naturally cooled) as necessary.
- the thickness of the CNT array sheet 3 after the heat treatment is substantially the same as the thickness of the CNT array sheet 3 before the heat treatment because the plurality of CNTs 6 are concentrated while maintaining the orientation (linearity). More specifically, the thickness of the CNT array sheet 3 after heat treatment is preferably 95% or more and 105% or less, for example, 100% with respect to the thickness of the CNT array sheet 3 before heat treatment. It is more preferable.
- the volume of the CNT array sheet 3 after the heat treatment is, for example, preferably 10% or more, more preferably 30% or more with respect to the volume of the CNT array sheet 3 before the heat treatment, 70% or less, more preferably 50% or less.
- the G / D ratio of the CNT array sheet 3 after the heat treatment is preferably 2 or more, for example.
- the CNT array sheet 3 is sprayed with a volatile liquid or the CNT array sheet 3 is immersed in the volatile liquid.
- Examples of the volatile liquid include water and organic solvents.
- Examples of the organic solvent include lower (C1-3) alcohols (for example, methanol, ethanol, propanol, etc.), ketones (for example, acetone), ethers (for example, diethyl ether, tetrahydrofuran, etc.), alkyl esters. (Eg, ethyl acetate), halogenated aliphatic hydrocarbons (eg, chloroform, dichloromethane, etc.), polar aprotics (eg, N-methylpyrrolidone, dimethylformamide, etc.), and the like.
- volatile liquids water is preferable.
- volatile liquids can be used alone or in combination of two or more.
- the volatile liquid When a volatile liquid is supplied to the CNT array sheet 3, the volatile liquid is vaporized, whereby a plurality of CNTs 6 are densely packed together, and the density of the CNT array sheet 3 is improved.
- such a densification process is performed at least once and can be repeated a plurality of times.
- the same densification process may be repeated a plurality of times, or a plurality of types of densification processes may be combined.
- only the above heat treatment can be repeated a plurality of times, and the above heat treatment and the above liquid supply treatment can be combined.
- the average bulk density of the plurality of CNTs 6 is preferably, for example, 50 mg / cm 3 or more, and the electric resistance (conducting resistance) in the thickness direction is 25 ° C. It is preferably 1 ⁇ or more, and the thermal conductivity is preferably, for example, 10 W / (m ⁇ K) or more in the thickness direction.
- the fixed sheet 2 formed from the sintered body of inorganic carbide and the two CNT array sheets 3 are prepared.
- the metal thin film 30 is disposed between the fixed sheet 2 and the CNT array sheet 3 (thin film disposing step).
- the metal thin film 30 is formed on each of the two CNT array sheets 3 (thin film forming step).
- the metal thin film 30 is formed on the other surface in the thickness direction of the first CNT array sheet 3A, and the metal thin film 30 is formed on the one surface in the thickness direction of the second CNT array sheet 3B.
- a metal is deposited on the CNT array sheet 3.
- the metal include the above metals.
- the same metal as the metal element contained in the inorganic carbide of the fixed sheet 2 is preferable from the viewpoint of affinity.
- the inorganic carbide of the fixed sheet 2 is titanium carbide
- titanium is preferably used as the metal of the metal thin film 30
- the metal of the metal thin film 30 is preferable.
- silicon is preferable.
- the combination of the inorganic carbide of the fixed sheet 2 and the metal of the metal thin film 30 is preferably a combination of titanium carbide and titanium and a combination of silicon carbide and silicon.
- the CNT array sheet 3 is disposed on both the front surface 2A and the back surface 2B of the fixed sheet 2 so that the metal thin film 30 is in contact with the fixed sheet 2.
- the first CNT array sheet 3A is arranged so that the metal thin film 30 of the first CNT array sheet 3A is in contact with the front surface 2A of the fixed sheet 2, and the second CNT array sheet is disposed on the back surface 2B of the fixed sheet 2.
- the second CNT array sheet 3B is arranged so that the 3B metal thin film 30 contacts.
- the first CNT array sheet 3A and the second CNT array sheet 3B are disposed so as to sandwich the fixed sheet 2 in the thickness direction, and the metal thin film 30 is disposed between the CNT array sheet 3 and the fixed sheet 2.
- the thickness of the metal thin film 30 is 5 nm or more and 1 micrometer or less, for example.
- the fixed sheet 2 on which the CNT array sheet 3 is disposed (the CNT array sheet 3 and the fixed sheet 2 on which the metal thin film 30 is disposed) is fired in a vacuum or in an inert atmosphere (firing step).
- the fixed sheet 2 on which the CNT array sheet 3 is disposed is disposed in the heating furnace. And the inside of a heating furnace is made into a vacuum state by a well-known method (for example, vacuum pump etc.), or it replaces with said inert gas atmosphere.
- a well-known method for example, vacuum pump etc.
- the vacuum pressure is, for example, preferably 100 Pa or less, and more preferably 10 Pa or less.
- the inert gas is preferably argon.
- the temperature is maintained and left for a predetermined time.
- the firing temperature is equal to or higher than the temperature at which the metal thin film 30 melts and lower than the sublimation temperature of the CNT 6, for example, preferably 1000 ° C. or higher, more preferably 1500 ° C. or higher, for example, 2500 ° C. or lower. It is preferable, and it is more preferable that it is 2000 degrees C or less.
- the firing time is, for example, preferably 1 minute or more, more preferably 5 minutes or more, for example, preferably 1 hour or less, and more preferably 30 minutes or less.
- the metal of the metal thin film 30 deposited on the CNT array sheet 3 reacts with the carbon of the CNT 6 of the CNT array sheet 3 to generate inorganic carbides.
- the inorganic carbide of the fixed sheet 2 is silicon carbide and the metal of the metal thin film 30 is silicon
- the carbon of the CNT 6 of the CNT array sheet 3 reacts with silicon to form silicon carbide (inorganic carbide).
- the silicon carbide (inorganic carbide) is sintered so as to be integrated with the silicon carbide (inorganic carbide) sintered body 4 of the fixed sheet 2, and the CNT 6 and the fixed sheet are sintered. 2 is joined.
- the CNT 6 of the CNT array sheet 3 is firmly bonded to the sintered body 4 by silicon carbide (inorganic carbide) generated by the reaction.
- the end portion of the CNT array sheet 3 (CNT6) is embedded in the sintered body 4 and bonded.
- the CNT array sheet 3 is supported by the fixed sheet 2.
- the other side end portion of the CNT 6 in the first CNT array sheet 3A is embedded and bonded to the sintered body 4 on the surface 2A of the fixed sheet 2, and one side end of the CNT 6 in the second CNT array sheet 3B.
- the part is embedded in and bonded to the sintered body 4 on the back surface 2B of the fixed sheet 2.
- the heat conductive sheet 1 is manufactured by cooling.
- the CNT array sheet 3 is joined to the sintered body 4 by reactive sintering involving the reaction of carbon of the CNT 6 and silicon in the firing step.
- the sintered body 4 contains silicon carbide (inorganic carbide) as a reaction product of the carbon of the CNT array sheet 3 and silicon. That is, the sintered body 4 includes a sintered body of carbon included in the CNT array sheet 3 and silicon included in the fixed sheet 2.
- the inorganic carbide of the fixed sheet 2 is titanium carbide and the metal thin film 30 is formed of titanium
- the carbon of the CNT 6 of the CNT array sheet 3 reacts with the titanium of the metal thin film 30 in the above firing step.
- titanium carbide is produced, and the titanium carbide is sintered so as to be integrated with the titanium carbide sintered body 4 of the fixed sheet 2 and joined to the CNT 6 and the fixed sheet 2.
- the CNT array sheet 3 is joined to the sintered body 4 by reactive sintering involving a reaction between carbon of the CNT 6 and titanium.
- the sintered body 4 contains titanium carbide (inorganic carbide) as a reaction product of the carbon of the CNT array sheet 3 and titanium. That is, the sintered body 4 includes a sintered body of carbon included in the CNT array sheet 3 and titanium included in the fixed sheet 2.
- such a thermal conductive sheet 1 includes, for example, an electronic component 11 (target object) and a heat dissipation member 10 (target object) as a TIM. It is arranged and used so as to be sandwiched in the thickness direction between them.
- Examples of the electronic component 11 include a semiconductor element (such as an IC (integrated circuit) chip), a light emitting diode (LED), a high output laser oscillation element, a high output lamp, and a power semiconductor element.
- a semiconductor element such as an IC (integrated circuit) chip
- LED light emitting diode
- a high output laser oscillation element a high output lamp
- a power semiconductor element such as an IC (integrated circuit) chip
- Examples of the heat radiating member 10 include a heat sink and a heat spreader.
- fine irregularities are formed on the surface 11B of the electronic component 11 and the surface 10A of the heat radiating member 10.
- Their surface roughness Rz (10-point average roughness according to JIS B0601-2013) is preferably 1 ⁇ m or more and 10 ⁇ m or less, for example.
- the plurality of CNTs 6 of the first CNT array sheet 3A are in stable contact with the surface 10A of the heat radiating member 10 following the fine irregularities of the surface 10A of the heat radiating member 10. Further, the plurality of CNTs 6 of the second CNT array sheet 3B are in stable contact with the surface 11B of the electronic component 11 following the fine irregularities of the surface 11B of the electronic component 11.
- the heat from the electronic component 11 is transmitted to the heat radiating member 10 through the second CNT array sheet 3B, the fixed sheet 2 and the first CNT array sheet 3A sequentially.
- the thermal conductive sheet 1 includes a CNT array sheet 3 as shown in FIG. 1B. Therefore, when the heat conductive sheet 1 is brought into contact with an object (for example, the heat radiating member 10 and the electronic component 11), the plurality of CNTs 6 of the CNT array sheet 3 can follow the fine unevenness of the object surface. .
- the CNT array sheet 3 is joined to the sintered body 4 of the fixed sheet 2 as shown in FIG. 1A. Therefore, it is possible to suppress the CNT 6 included in the CNT array sheet 3 from dropping from the fixed sheet 2.
- the sintered body 4 includes a sintered body of carbon included in the CNT array sheet 3 and silicon and / or titanium included in the fixed sheet 2. Therefore, the affinity between the CNT array sheet 3 and the sintered body 4 can be improved, and the CNT array sheet 3 can be reliably bonded to the sintered body 4. As a result, it is possible to reliably prevent the CNT 6 included in the CNT array sheet 3 from dropping from the fixed sheet 2.
- the end of the CNT array sheet 3 is embedded in the sintered body 4. Therefore, it is possible to further reliably prevent the CNT 6 included in the CNT array sheet 3 from dropping from the fixed sheet 2.
- the average bulk density of the CNT array sheet 3 is 50 mg / cm 3 or more. Therefore, the thermal conductivity of the CNT array sheet 3 can be improved, and consequently the thermal conductivity of the thermal conductive sheet 1 can be improved.
- the CNT array sheet 3 peeled from the growth substrate 15 is bonded to the sintered body 4 of the fixed sheet 2, the CNT array sheet 3 is peeled from the growth substrate 15 and then subjected to a densification treatment. Can do. Therefore, the average bulk density of the CNT array sheet 3 can be set to the above lower limit or more.
- the CNT array sheet 3 is placed on the fixed sheet 2 formed from the inorganic sintered body 4, and then fired.
- the CNT array sheet 3 can be firmly bonded to the fixed sheet 2.
- the heat conductive sheet 1 provided with the CNT array sheet 3 joined to the sintered body 4 of the fixed sheet 2 can be efficiently manufactured.
- the metal thin film 30 is formed on the CNT array sheet 3 and the CNT array sheet 3 is disposed on the fixed sheet 2 in the thin film disposing step. After forming the metal thin film 30 on the fixed sheet 2, the CNT array sheet 3 can be disposed on the metal thin film 30. Also by this, the metal thin film 30 can be disposed between the CNT array sheet 3 and the fixed sheet 2.
- a fixed sheet 2 formed from an inorganic sintered body 4 is prepared, and a CNT array sheet 3 is arranged on the fixed sheet 2 and then fired.
- the heat conductive sheet 1 is manufactured, the present invention is not limited to the method for manufacturing such a heat conductive sheet.
- a resin sheet 7 containing inorganic particles 8 is prepared.
- the resin sheet 7 has a sheet shape (flat plate shape), and has a flat front surface 7A (one surface in the thickness direction) and a flat back surface 7B (the other surface in the thickness direction).
- the resin sheet 7 is formed from a resin material. That is, the resin sheet 7 contains the resin material and the inorganic particles 8. Examples of the resin material include a thermosetting resin and a thermoplastic resin.
- thermosetting resin is a cured body (thermosetting resin after curing), for example, epoxy resin, polyimide resin, phenol resin, urea resin, melamine resin, unsaturated polyester resin, thermosetting elastomer (for example, Vulcanized rubber, silicone rubber, acrylic rubber, etc.).
- thermoplastic resin examples include polyester (for example, polyethylene terephthalate), polyolefin (for example, polyethylene, polypropylene, etc.), polyamide, polystyrene, polyvinyl chloride, polyvinyl alcohol (PVA), polyvinylidene chloride, polyacrylonitrile, polyurethane, Fluorine polymer (eg, polytetrafluoroethylene (PTFE), polyvinyl fluoride, polyvinylidene fluoride, etc.), thermoplastic elastomer (eg, olefin elastomer (eg, ethylene-propylene rubber, ethylene-propylene-diene rubber, etc.), styrene Based elastomers, vinyl chloride based elastomers, etc.).
- polyester for example, polyethylene terephthalate
- polyolefin for example, polyethylene, polypropylene, etc.
- polyamide polystyrene
- polyvinyl chloride polyviny
- thermoplastic resin a thermoplastic resin is preferable, PVA and a fluorine-based polymer are more preferable, and PVA is particularly preferable.
- resin materials can be used alone or in combination of two or more.
- the thickness of the resin sheet 7 is, for example, preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, for example, preferably 300 ⁇ m or less, and more preferably 100 ⁇ m or less.
- the inorganic particle 8 is a particle formed from the above inorganic substance.
- the inorganic particles 8 may be composed of one kind of inorganic particles or may be composed of two or more kinds of inorganic particles.
- the average primary particle diameter of the inorganic particles 8 is, for example, preferably 0.1 ⁇ m or more, more preferably 1 ⁇ m or more, for example, preferably 20 ⁇ m or less, and more preferably 10 ⁇ m or less.
- the content ratio of the inorganic particles 8 is, for example, preferably 5% by mass or more, more preferably 10% by mass or more, for example, 50% by mass or less, with respect to the total amount of the resin sheet 7. It is preferably 40% by mass or less.
- the CNT array sheets 3 prepared in the same manner as in the first embodiment are arranged on both the front surface 7A and the back surface 7B of the resin sheet 7. Then, the resin sheet 7 on which the CNT array sheet 3 is arranged is fired in a vacuum or in an inert atmosphere as in the first embodiment (firing step).
- the resin material of the resin sheet 7 is burned out, and the inorganic particles 8 come into contact with each other, and the end of the CNT array sheet 3 on the resin sheet 7 side comes into contact with the inorganic particles 8.
- the inorganic particles 8 that are in contact with each other are sintered, and the CNT 6 and the inorganic particles 8 of the CNT array sheet 3 are sintered. Thereby, the inorganic particles 8 become the sintered body 4 to form the fixed sheet 2, and the end of the CNT array sheet 3 (CNT 6) is joined to the sintered body 4.
- the CNT 6 of the CNT array sheet 3 reacts with the carbon of the CNT 6 and the metal and / or inorganic carbide as in the first embodiment. Embedded in and bonded to the sintered body 4 by reaction sintering accompanied by.
- the sintered body 4 contains a sintered body of metal and inorganic carbide or contains only a sintered body of inorganic carbide.
- the CNT 6 of the CNT array sheet 3 does not react with the inorganic particles 8 as the inorganic particles 8 are sintered. It is physically embedded and bonded to the sintered body 4.
- the sintered body 4 does not contain an inorganic carbide sintered body but contains an inorganic oxide and / or inorganic nitride sintered body.
- the two CNT array sheets 3 are embedded in and bonded to the inorganic sintered body 4 on both the front surface 2A and the back surface 2B of the fixed sheet 2 and supported by the fixed sheet 2 as in the first embodiment. Is done.
- the range of the electrical resistance (conductive resistance) in the thickness direction is the same as the range of the electrical resistance in the thickness direction of the thermal conductive sheet 1 described above.
- the range of the conductivity is the same as the range of the thermal conductivity of the thermal conductive sheet 1 described above.
- the heat conductive sheet 1 provided with the CNT array sheet 3 joined to the sintered body 4 of the fixed sheet 2 can be efficiently manufactured.
- the resin sheet 7 containing the inorganic particles 8 is prepared and the CNT array sheets 3 are arranged on both surfaces of the resin sheet 7, the resin sheet 7 is heated to thereby form the inorganic particles 8.
- the heat conductive sheet 1 is manufactured by sintering, this invention is not limited to the manufacturing method of such a heat conductive sheet.
- a paste containing inorganic particles 8 is prepared (paste preparation step).
- the paste contains the above resin material and inorganic particles 8.
- the inorganic particles 8 are dispersed in a resin solution.
- the content ratio of the inorganic particles 8 is, for example, preferably 5% by mass or more, more preferably 10% by mass or more, for example, preferably 50% by mass or less, based on the total amount of the paste. It is more preferable that the amount is not more than mass%.
- Resin solution is a solution in which the above resin material is dissolved in a solvent (for example, water, organic solvent, etc.).
- the resin material is preferably a thermoplastic resin, more preferably PVA.
- the paste is applied to one surface in the thickness direction of the second CNT array sheet 3B (CNT array sheet 3) prepared in the same manner as in the first embodiment to form the paste layer 40 (application process). . Therefore, the paste layer 40 contains a resin material and inorganic particles 8.
- the thickness of the paste layer 40 is, for example, preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more, for example, preferably 3 mm or less, more preferably 200 ⁇ m or less, and 100 ⁇ m or less. Is particularly preferred.
- the first CNT array sheet 3A (CNT array sheet 3) is disposed on the surface 40A (one side surface in the thickness direction) of the paste layer 40.
- the paste layer 40 is sandwiched between the first CNT array sheet 3A and the second CNT array sheet 3B.
- the CNT array sheets 3 first CNT array sheet 3A and second CNT array sheet 3B
- the front surface 40A and the back surface 40B of the paste layer 40 are arranged on both the front surface 40A and the back surface 40B of the paste layer 40.
- the paste layer 40 (CNT array sheet 3 coated with the paste) on which the CNT array sheet 3 is disposed is heated in a vacuum or in an inert atmosphere to fire the inorganic particles 8 (firing step).
- the range of baking temperature and baking time is the same as said 1st Embodiment.
- the resin material of the resin sheet 7 is burned out, the inorganic particles 8 come into contact with each other, and the end of the CNT array sheet 3 on the resin sheet 7 side comes into contact with the inorganic particles 8. And while the inorganic particle 8 which mutually contacts is sintered, CNT6 of the CNT array sheet
- seat 3 is embedded in the sintered compact 4, and is joined.
- the inorganic particles 8 are formed on the sintered body 4 by firing. Thereby, the fixed sheet 2 can be formed, and the CNT array sheet 3 can be joined to the sintered body 4 of the fixed sheet 2.
- the heat conductive sheet 1 provided with the CNT array sheet 3 joined to the sintered body 4 of the fixed sheet 2 can be efficiently manufactured.
- the heat conductive sheet 1 includes the CNT array sheet 3 bonded to both the front surface 2A and the back surface 2B of the fixed sheet 2, but is not limited thereto. As shown in FIG. 6, if the thermal conductive sheet 1 includes a CNT array sheet 3 bonded to the sintered body 4 of the fixed sheet 2 on at least one of the front surface 2A and the back surface 2B of the fixed sheet 2. Good.
- the CNT array sheet 3 after the densification treatment is used for manufacturing the heat conductive sheet 1, but the CNT array sheet 3 is not limited to this. After peeling off, the heat conductive sheet 1 may be used for the production without being densified.
- the CNT array sheet 3 is bonded to the sintered body 4 of the fixed sheet 2 and densified in the firing step.
- the average bulk density of the plurality of CNTs 6 in the CNT array sheet 3 is, for example, 50 mg / cm 3 or more.
- the VACNTs 19 on the growth substrate 15 are compressed by two pressing plates 46 to prepare a densified CNT array sheet 3.
- the two pressing plates 46 are arranged so as to sandwich the VACNTs 19, they are slid so as to approach each other to compress the VACNTs 19. Then, the plurality of CNTs 6 of the VACNTs 19 are separated from the corresponding granular material 18A and compressed so as to contact each other.
- the VACNTs 19 can be separated from the growth substrate 15 and the CNT array sheet 3 having a high density can be prepared.
- the fixed sheet 2 may contain graphite (graphite) generated by graphitizing the resin material in the firing step.
- graphite graphite generated by graphitizing the resin material in the firing step.
- the content rate of graphite is 10 mass% or more and 50 mass% or less with respect to the whole quantity of the fixed sheet 2, for example.
- the fixed sheet 2 has electrical insulation
- the heat conductive sheet 1 is configured as an electrical insulating sheet. May be formed to be electrically conductive, and the thermally conductive sheet 1 may be configured as an electrically conductive sheet.
- heat conductive sheet 1 is an electrically conductive sheet
- inorganic fine particles may be dispersed in the volatile liquid supplied in the densification process of the CNT array sheet 3.
- examples of the inorganic fine particles include carbon fine particles (for example, carbon black and amorphous carbon), metal fine particles, and ceramic fine particles having electrical conductivity. Such inorganic fine particles can be used alone or in combination of two or more.
- the CNT bonding sheet is the heat conductive sheet 1
- the use of the CNT bonding sheet is not limited to the heat conductive sheet.
- Examples of the use of the CNT bonding sheet include an adhesive sheet, a vibration isolating material, and a heat insulating material.
- Example 1 After a silicon dioxide film was laminated on the surface of a stainless steel growth substrate (stainless steel substrate), iron was deposited as a catalyst layer on the silicon dioxide film.
- the growth substrate was heated to a predetermined temperature, and a source gas (acetylene gas) was supplied to the catalyst layer.
- a source gas acetylene gas
- a plurality of CNTs extend so as to be substantially parallel to each other, and are aligned (vertically aligned) so as to be orthogonal to the growth substrate.
- the CNT was a multi-walled carbon nanotube, the average outer diameter of the CNT was about 12 nm, the average length of the CNT was about 80 ⁇ m, and the bulk density of the VACNTs was about 50 mg / cm 3 .
- the cutter blade (cutting blade) was moved along the growth substrate, and the VACNTs were separated from the growth substrate to prepare a CNT array sheet.
- the CNT array sheet was accommodated in a carbon container which is a heat-resistant container, and the carbon container was placed in a resistance heating furnace (high temperature heating furnace).
- the temperature was raised to 2800 ° C. at 10 ° C./min, and held at 2800 ° C. for 2 hours.
- the CNT array sheet was densified and then cooled to room temperature by natural cooling.
- the bulk density of the densified CNT array sheet is about 100 mg / cm 3 , and the electric resistance (conductive resistance) in the thickness direction of the CNT array sheet is 0.1 ⁇ at 25 ° C.
- the thermal conductivity of the sheet was about 30 W / (m ⁇ K) in the thickness direction.
- a silicon thin film (metal thin film) having a thickness of 20 nm was formed on one side of each of the two CNT array sheets by vapor deposition.
- a ceramic sheet (fixed sheet) having a thickness of 100 ⁇ m and formed from a sintered body of silicon carbide was prepared.
- the CNT array sheets were arranged on both the front and back surfaces of the fixed sheet so that the silicon thin film was in contact with the ceramic sheet.
- the ceramic sheet on which the CNT array sheet was placed was placed in a resistance heating furnace (high temperature heating furnace) and heated at 1700 ° C. for 15 minutes in an inert gas atmosphere.
- a resistance heating furnace high temperature heating furnace
- Example 2 A resin sheet formed of PVA and having silicon particles (inorganic particles) dispersed therein was prepared.
- the average primary particle diameter of the silicon particles was 2 ⁇ m
- the content ratio of the silicon particles was 20% by mass with respect to the total amount of the resin sheet.
- the content rate of PVA was 80 mass% with respect to the resin sheet whole quantity.
- Example 2 CNT array sheets prepared in the same manner as in Example 1 were arranged on both the front and back surfaces of the resin sheet. Subsequently, the resin sheet on which the CNT array sheet was placed was placed in a resistance heating furnace (high temperature heating furnace) and heated at 1700 ° C. for 15 minutes in an inert gas atmosphere.
- a resistance heating furnace high temperature heating furnace
- the PVA of the resin sheet is burned out, the carbon of the CNT reacts with the silicon particles of the resin sheet to generate silicon carbide, and the silicon carbide and the silicon particles form a sintered body to be fixed.
- a sheet was formed. That is, the fixed sheet contained a sintered body of silicon carbide and silicon. The thickness of the fixed sheet was 100 ⁇ m.
- Paste was prepared by dispersing silicon particles (inorganic particles) in a PVA solution (resin solution, PVA concentration: 10 mass%) in which PVA was dissolved in water (solvent).
- the average primary particle diameter of the silicon particles was 2 ⁇ m
- the content ratio of the silicon particles was 20% by mass with respect to the total amount of the paste.
- the content rate of PVA was 80 mass% with respect to the paste whole quantity.
- the paste was applied to one of the two CNT array sheets prepared in the same manner as in Example 1 to form a paste layer having a thickness of about 2 mm.
- the other CNT array sheet was placed on the paste layer so that the paste layer was sandwiched between the two CNT array sheets.
- the paste layer on which the CNT array sheet was placed was placed in a resistance heating furnace (high temperature heating furnace) and heated at 1700 ° C. for 15 minutes in an inert gas atmosphere. Then, it cooled and obtained the heat conductive sheet.
- the fixed sheet had a thickness of 100 ⁇ m.
- Example 4 A thermally conductive sheet was obtained in the same manner as in Example 2 except that a resin sheet formed of PVA and having silicon nitride particles (inorganic particles) dispersed therein was prepared. In addition, the thickness of the fixing sheet of a heat conductive sheet was 100 micrometers.
- VACNTs having a substantially rectangular shape in plan view were formed on both the front and back surfaces of the substrate.
- the average outer diameter of CNT, the average length of CNT, and the bulk density were the same as in Example 1.
- the growth substrate on which VACNTs are arranged on both sides was used as a heat conductive sheet.
- the CNT bonding sheet can be applied to various industrial products, and can be used as, for example, a heat conductive material, an adhesive sheet, a vibration isolating material, a heat insulating material and the like.
- the manufacturing method of a CNT joining sheet can be used suitably for manufacture of the CNT joining sheet used for various industrial products.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Thermal Sciences (AREA)
- Nanotechnology (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Composite Materials (AREA)
- Structural Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Laminated Bodies (AREA)
Abstract
Description
1.第1実施形態
(1)熱伝導性シートの構成
熱伝導性シート1(CNT接合シートの一例)は、図1Aに示すように、固定シート2と、2つのカーボンナノチューブアレイシート3(以下、CNTアレイシート3とする。)とを備えている。
次に、熱伝導性シート1(CNT接合シートの一例)の製造方法の一実施形態について説明する。
このような熱伝導性シート1は、TIMとして、図1Bに示すように、例えば、電子部品11(対象物)と、放熱部材10(対象物)との間に、厚み方向に挟まれるように配置されて使用される。
熱伝導性シート1は、図1Bに示すように、CNTアレイシート3を備えている。そのため、熱伝導性シート1を対象物(例えば、放熱部材10および電子部品11)に接触させたときに、CNTアレイシート3の複数のCNT6を対象物表面の微細な凹凸に追従させることができる。
第1実施形態では、図4Cに示すように、無機物の焼結体4から形成される固定シート2を準備し、その固定シート2にCNTアレイシート3を配置した後、焼成して熱伝導性シート1を製造するが、本発明は、そのような熱伝導性シートの製造方法に限定されない。
次に、図5Bおよび図5Cを参照して、第3実施形態について説明する。なお、上記した第1実施形態および第2実施形態と同様の部材には同様の符号を付し、その説明を省略する。
第1実施形態および第2実施形態では、熱伝導性シート1は、固定シート2の表面2Aおよび裏面2Bの両面に接合されるCNTアレイシート3を備えているが、これに限定されない。図6に示すように、熱伝導性シート1は、固定シート2の表面2Aおよび裏面2Bの少なくともいずれか一方において、固定シート2の焼結体4と接合するCNTアレイシート3を備えていればよい。
ステンレス製の成長基板(ステンレス基板)の表面に二酸化ケイ素膜を積層した後、二酸化ケイ素膜上に、触媒層として鉄を蒸着した。
PVAから形成され、ケイ素粒子(無機粒子)が分散されている樹脂シートを準備した。なお、ケイ素粒子の平均一次粒子径は、2μmであり、ケイ素粒子の含有割合は、樹脂シート全量に対して、20質量%であった。また、PVAの含有割合は、樹脂シート全量に対して、80質量%であった。
PVAが水(溶媒)に溶解されたPVA溶液(樹脂溶液、PVA濃度:10質量%)に、ケイ素粒子(無機粒子)を分散させて、ペーストを準備した。
PVAから形成され、窒化ケイ素粒子(無機粒子)が分散されている樹脂シートを準備したこと以外は、実施例2と同様にして、熱伝導性シートを得た。なお、熱伝導性シートの固定シートの厚みは、100μmであった。
ステンレス製の成長基板の表面および裏面の両面に、二酸化ケイ素膜を積層した後、二酸化ケイ素膜上に、触媒層として鉄を蒸着した。
(1)熱伝導率
各実施例および比較例で得られた熱伝導性シートについて、熱抵抗を熱抵抗測定装置(商品名:T3Ster DynTIM Tester、メンターグラフィックス社製)により測定した。そして、熱伝導性シートの厚みを変更して、熱抵抗を複数点(例えば、3点)測定し、熱伝導性シートの厚みおよび測定された熱抵抗をプロットした。そのプロット結果から、熱伝導性シートの熱伝導率を算出した。その結果を表1に示す。
(2)電気抵抗
各実施例および比較例で得られた熱伝導性シートについて、厚み方向の電気抵抗を電気抵抗測定装置(商品名:レジスティビティ・チェンバ、エーディーシー社製)により測定した。その結果を、表1に示す。
(3)接着強度試験
各実施例で得られた熱伝導性シートについて、粘着テープを、CNTアレイシートに対して、固定シートと反対側から貼着した後、粘着テープを剥離した。
×:CNTアレイシート(VACNTs)の固定シート(成長基板)からの顕著な剥離がみられた。
2 固定シート
3 CNTアレイシート
4 焼結体
6 CNT
7 樹脂シート
8 無機粒子
15 成長基板
19 VACNTs
Claims (7)
- 無機物の焼結体から形成される固定シートと、
前記固定シートの前記焼結体と接合しているカーボンナノチューブアレイシートと、を備えていることを特徴とする、カーボンナノチューブ接合シート。 - 前記無機物は、ケイ素および/またはチタンを含み、
前記焼結体は、前記カーボンナノチューブアレイシートが有する炭素と、前記固定シートに含まれるケイ素および/またはチタンとの焼結体を含んでいることを特徴とする、請求項1に記載のカーボンナノチューブ接合シート。 - 前記カーボンナノチューブアレイシートの前記焼結体と接合する端部は、前記焼結体に埋め込まれていることを特徴とする、請求項1に記載のカーボンナノチューブ接合シート。
- 前記カーボンナノチューブアレイシートの平均嵩密度は、50mg/cm3以上であることを特徴とする、請求項1に記載のカーボンナノチューブ接合シート。
- 無機物の焼結体から形成される固定シートを準備する工程と、
成長基板上に垂直配向カーボンナノチューブを成長させる工程と、
前記成長基板から前記垂直配向カーボンナノチューブを剥離し、カーボンナノチューブアレイシートとする工程と、
前記カーボンナノチューブアレイシートと前記固定シートとの間に金属薄膜を配置する工程と、
前記金属薄膜が配置された前記カーボンナノチューブアレイシートおよび前記固定シートを、真空下または不活性雰囲気下で焼成する工程と、を含むことを特徴とする、カーボンナノチューブ接合シートの製造方法。 - 無機粒子を含有する樹脂シートを準備する工程と、
成長基板上に垂直配向カーボンナノチューブを成長させる工程と、
前記成長基板から前記垂直配向カーボンナノチューブを剥離し、カーボンナノチューブアレイシートとする工程と、
前記カーボンナノチューブアレイシートを前記樹脂シート上に配置する工程と、
前記カーボンナノチューブアレイシートが配置された前記樹脂シートを、真空下または不活性雰囲気下で焼成する工程と、を含むことを特徴とする、カーボンナノチューブ接合シートの製造方法。 - 成長基板上に垂直配向カーボンナノチューブを成長させる工程と、
前記成長基板から前記垂直配向カーボンナノチューブを剥離し、カーボンナノチューブアレイシートとする工程と、
前記カーボンナノチューブアレイシートに、無機粒子を含有するペーストを塗布する工程と、
前記ペーストが塗布されたカーボンナノチューブアレイシートを、真空下または不活性雰囲気下で焼成する工程と、を含むことを特徴とする、カーボンナノチューブ接合シートの製造方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/066,519 US20190010376A1 (en) | 2015-12-28 | 2016-12-28 | Carbon nanotube bonded sheet and method for producing carbon nanotube bonded sheet |
CN201680074758.7A CN108430919B (zh) | 2015-12-28 | 2016-12-28 | 碳纳米管接合片以及碳纳米管接合片的制造方法 |
JP2017559229A JP6714616B2 (ja) | 2015-12-28 | 2016-12-28 | カーボンナノチューブ接合シートおよびカーボンナノチューブ接合シートの製造方法 |
EP16881805.2A EP3398906A4 (en) | 2015-12-28 | 2016-12-28 | CARBON NANOTUBE JUNCTION SHEET AND PROCESS FOR PRODUCTION THEREOF OF CARBON NANOTUBE JUNCTION SHEET |
KR1020187018111A KR102693898B1 (ko) | 2015-12-28 | 2016-12-28 | 카본나노튜브 접합시트 및 카본나노튜브 접합시트의 제조방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015256721 | 2015-12-28 | ||
JP2015-256721 | 2015-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017115831A1 true WO2017115831A1 (ja) | 2017-07-06 |
Family
ID=59224784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2016/089030 WO2017115831A1 (ja) | 2015-12-28 | 2016-12-28 | カーボンナノチューブ接合シートおよびカーボンナノチューブ接合シートの製造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20190010376A1 (ja) |
EP (1) | EP3398906A4 (ja) |
JP (1) | JP6714616B2 (ja) |
KR (1) | KR102693898B1 (ja) |
CN (1) | CN108430919B (ja) |
TW (1) | TWI725099B (ja) |
WO (1) | WO2017115831A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11735493B2 (en) | 2019-05-08 | 2023-08-22 | Fujitsu Limited | Conductive heat radiation film, method of manufacturing the same, and method of manufacturing electronic device |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110306167B (zh) * | 2019-06-06 | 2021-06-04 | 沈阳航空航天大学 | 一种原位生长cnt层增强轻质合金胶接界面强度的方法 |
JP7372092B2 (ja) * | 2019-09-18 | 2023-10-31 | 日立造船株式会社 | カーボンナノチューブ撚糸の製造方法 |
US11581236B2 (en) * | 2020-02-14 | 2023-02-14 | Micron Technology, Inc. | Self-cleaning heatsink for electronic components |
CN214176013U (zh) | 2020-12-23 | 2021-09-10 | 迪科特测试科技(苏州)有限公司 | 半导体结构 |
KR102283073B1 (ko) * | 2021-01-08 | 2021-07-28 | 새빛이앤엘 (주) | 탄성 인터레이어와 cnt 레이어를 이용한 하이브리드 방열 조립체 및 그 조립 방법 |
US11653475B2 (en) * | 2021-02-01 | 2023-05-16 | Microsoft Technology Licensing, Llc | Thermally conductive microtubes for evenly distributing heat flux on a cooling system |
DE102023108698A1 (de) | 2023-04-05 | 2024-10-10 | Danfoss Silicon Power Gmbh | Baugruppe zur Bereitstellung elektronischer Funktionalitäten und Mittel zur Qualitätssicherung einer Fixierschicht davon |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014227331A (ja) * | 2013-05-27 | 2014-12-08 | 日立造船株式会社 | カーボンナノチューブシートおよびその製造方法 |
JP2015098418A (ja) * | 2013-11-20 | 2015-05-28 | 日立造船株式会社 | カーボンナノチューブシートの製造方法 |
JP2015526904A (ja) * | 2013-07-10 | 2015-09-10 | ▲ホア▼▲ウェイ▼技術有限公司 | 熱界面パッド及びその製造方法並びに放熱システム |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856939B1 (fr) * | 2003-07-03 | 2005-09-30 | Jobin Yvon Sas | Humidificateur de gaz |
US20050116336A1 (en) * | 2003-09-16 | 2005-06-02 | Koila, Inc. | Nano-composite materials for thermal management applications |
CN100454526C (zh) * | 2005-06-30 | 2009-01-21 | 鸿富锦精密工业(深圳)有限公司 | 热界面材料制造方法 |
JP5364978B2 (ja) * | 2007-03-28 | 2013-12-11 | 富士通セミコンダクター株式会社 | 表面改質カーボンナノチューブ系材料、その製造方法、電子部材および電子装置 |
CN100569509C (zh) * | 2007-06-15 | 2009-12-16 | 清华大学 | 一种碳纳米管阵列/层状材料复合物及其制备方法 |
JP5146371B2 (ja) * | 2008-07-11 | 2013-02-20 | 株式会社豊田中央研究所 | カーボンナノ複合体、それを含む分散液及び樹脂組成物、並びにカーボンナノ複合体の製造方法 |
JP5463674B2 (ja) * | 2009-01-28 | 2014-04-09 | 株式会社豊田中央研究所 | カーボンナノ複合体、それを含む分散液および樹脂組成物、ならびにカーボンナノ複合体の製造方法 |
GB0914816D0 (en) * | 2009-08-25 | 2009-09-30 | Isis Innovation | Method of fabrication of aligned nanotube-containing composites |
JP5293561B2 (ja) * | 2009-10-29 | 2013-09-18 | 富士通株式会社 | 熱伝導性シート及び電子機器 |
CN102792441B (zh) * | 2010-03-12 | 2016-07-27 | 富士通株式会社 | 散热结构及其制造方法 |
US9096784B2 (en) * | 2010-07-23 | 2015-08-04 | International Business Machines Corporation | Method and system for allignment of graphite nanofibers for enhanced thermal interface material performance |
JP2014002273A (ja) * | 2012-06-19 | 2014-01-09 | Nec Corp | 情報表示装置、その制御方法及びプログラム |
US9656246B2 (en) * | 2012-07-11 | 2017-05-23 | Carbice Corporation | Vertically aligned arrays of carbon nanotubes formed on multilayer substrates |
JP2014094856A (ja) * | 2012-11-09 | 2014-05-22 | Hitachi Zosen Corp | カーボンナノチューブ生成用基板の製造方法および連続製造装置 |
JP2014234339A (ja) * | 2013-06-05 | 2014-12-15 | 日立造船株式会社 | カーボンナノチューブシートおよびカーボンナノチューブシートの製造方法 |
JP2015001180A (ja) * | 2013-06-14 | 2015-01-05 | 株式会社東芝 | 軸流タービン |
JP6186933B2 (ja) * | 2013-06-21 | 2017-08-30 | 富士通株式会社 | 接合シート及びその製造方法、並びに放熱機構及びその製造方法 |
CN104973583B (zh) * | 2014-04-14 | 2017-04-05 | 清华大学 | 碳纳米管阵列的转移方法及碳纳米管结构的制备方法 |
CN104973584B (zh) * | 2014-04-14 | 2018-03-02 | 清华大学 | 碳纳米管阵列的转移方法及碳纳米管结构的制备方法 |
-
2016
- 2016-12-28 WO PCT/JP2016/089030 patent/WO2017115831A1/ja active Application Filing
- 2016-12-28 US US16/066,519 patent/US20190010376A1/en not_active Abandoned
- 2016-12-28 EP EP16881805.2A patent/EP3398906A4/en not_active Withdrawn
- 2016-12-28 TW TW105143733A patent/TWI725099B/zh active
- 2016-12-28 JP JP2017559229A patent/JP6714616B2/ja active Active
- 2016-12-28 KR KR1020187018111A patent/KR102693898B1/ko active IP Right Grant
- 2016-12-28 CN CN201680074758.7A patent/CN108430919B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014227331A (ja) * | 2013-05-27 | 2014-12-08 | 日立造船株式会社 | カーボンナノチューブシートおよびその製造方法 |
JP2015526904A (ja) * | 2013-07-10 | 2015-09-10 | ▲ホア▼▲ウェイ▼技術有限公司 | 熱界面パッド及びその製造方法並びに放熱システム |
JP2015098418A (ja) * | 2013-11-20 | 2015-05-28 | 日立造船株式会社 | カーボンナノチューブシートの製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3398906A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11735493B2 (en) | 2019-05-08 | 2023-08-22 | Fujitsu Limited | Conductive heat radiation film, method of manufacturing the same, and method of manufacturing electronic device |
US12027441B2 (en) | 2019-05-08 | 2024-07-02 | Fujitsu Limited | Conductive heat radiation film, method of manufacturing the same, and method of manufacturing electronic device |
Also Published As
Publication number | Publication date |
---|---|
TWI725099B (zh) | 2021-04-21 |
JP6714616B2 (ja) | 2020-06-24 |
KR102693898B1 (ko) | 2024-08-08 |
CN108430919A (zh) | 2018-08-21 |
EP3398906A1 (en) | 2018-11-07 |
US20190010376A1 (en) | 2019-01-10 |
EP3398906A4 (en) | 2019-10-23 |
CN108430919B (zh) | 2022-01-28 |
KR20180098560A (ko) | 2018-09-04 |
JPWO2017115831A1 (ja) | 2018-11-29 |
TW201722845A (zh) | 2017-07-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017115831A1 (ja) | カーボンナノチューブ接合シートおよびカーボンナノチューブ接合シートの製造方法 | |
US11414321B2 (en) | Carbon nanotube composite material and method for producing carbon nanotube composite material | |
JP6840725B2 (ja) | カーボンナノチューブ構造体の起毛方法、カーボンナノチューブ構造体の製造方法およびカーボンナノチューブ構造体 | |
US20060035085A1 (en) | High thermal conductivite element, method for manufacturing same, and heat radiating system | |
US9284196B2 (en) | Graphene-like nanosheet structure network on a substrate and the method for forming the same | |
US7150911B2 (en) | Electrical insulating vapor grown carbon fiber and method for producing the same, and use thereof | |
EP1588385A1 (en) | Carbonaceous material for forming electrically conductive material and use thereof | |
WO2016136826A1 (ja) | カーボンナノチューブ高密度集合体およびカーボンナノチューブ高密度集合体の製造方法 | |
JPWO2019078036A1 (ja) | サセプター | |
JP6917725B2 (ja) | カーボンナノチューブ複合材の製造方法、カーボンナノチューブ複合材および異方性カーボンナノチューブ複合材 | |
EP3532539B1 (en) | Composite material and method of forming same, and electrical component including composite material | |
JP2017071528A (ja) | 層間熱接合材料およびパワー半導体用冷却システム | |
JP2007314401A (ja) | ダイヤモンドの製造方法 | |
CN117776736A (zh) | 氮化硼全陶瓷颗粒、其制备方法及应用 | |
RU2007112860A (ru) | Углеродсодержащий наноматериал с низким порогом полевой эмиссии электронов и способ его получения (варианты) | |
CN106584968A (zh) | 一种高散热性能石墨烯复合材料 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16881805 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017559229 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20187018111 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016881805 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2016881805 Country of ref document: EP Effective date: 20180730 |