# US 2013/0157041 A1 · Self-assembly coating material, heat sink and method of forming heat sink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157041 A1 - Document ID: US20130157041A1 - Status: Published application - Kind: A1 - Application number: 13/610,873 - Filed: 2012-09-12 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Industrial Technology Research Institute - Inventors: Yu-Lin Hsin; Chih-Kuang Chang; Mei-Hua Wang; Ting-Yao Su; Hsiao-Chun Yeh - Web page: https://patentgrep.com/patent/US20130157041A1 ## CPC - C09D 7/62: modified by treatment with other compounds - C09D 5/00: Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes - C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres} - F28F 13/18: by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing - F28F 21/02: of carbon, e.g. graphite - H05K 7/20427: {having radiation enhancing surface treatment, e.g. black coating} - H10W 40/25: characterised by their materials - H10W 40/251: {Organics} - C01P 2002/82: by IR- or Raman-data - C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC - C01P 2006/32: Thermal properties - C09C 1/56: Treatment of carbon black {; Purification} - F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence) - Y10T 428/254: Polymeric or resinous material - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A self-assembly coating material including carbon particles and polymer shells is provided. The polymer shells respectively cover and are bonded to the carbon particles, wherein each polymer shell has both a first functional group for adsorbing on a surface of a substrate and a second functional group for self cross-linking. The first functional groups include thiol groups. The second functional groups include epoxy groups or carboxylic groups. The self-assembly coating material can be applied to a metal substrate to form a heat dissipation layer. ## Claims ### Claim 1 A self-assembly coating material, comprising: a plurality of carbon particles; and a plurality of polymer shells, respectively cover and are bonded to the carbon particles, wherein each polymer shell has a first functional group and a second functional group, the first functional groups comprise thiol groups, and the second functional groups comprise epoxy groups or carboxylic groups. ### Claim 2 (depends on 1) The self-assembly coating material of claim 1, wherein each first functional group is for adsorbing on a surface of a substrate, and the substrate comprises a metal. ### Claim 3 (depends on 1) The self-assembly coating material of claim 1, wherein the carbon particles are selected from the group consisting of carbon nanotubes, diamond particles, graphite powder, carbon black, carbon fibers, graphenes and mixtures thereof. ### Claim 4 (depends on 1) The self-assembly coating material of claim 1, wherein the polymer shells account for about 1-20 wt % of the self-assembly coating material. ### Claim 5 (depends on 1) The self-assembly coating material of claim 1, wherein the polymer shells account for about 5-15 wt % of the self-assembly coating material. ### Claim 6 (depends on 1) The self-assembly coating material of claim 1, wherein each polymer shell comprises a plurality of polymer chains, and a weight-average molecular weight of each polymer chain ranges from about 50,000 to about 150,000. ### Claim 7 (depends on 6) The self-assembly coating material of claim 6, wherein each polymer chain comprises partially-thiolated polyglycidyl methacrylate (PGMA), partially-thiolated poly 2-(4-vinylphenyl)oxirane, or partially-thiolated polyacrylic acid. ### Claim 8 A heat sink, comprising: a substrate; and a heat dissipation coating material, covering a surface of the substrate, the coating material comprising carbon particles each covered and bonded with a polymer shell, wherein the polymer shells of the heat dissipation coating material are bonded to the surface of the substrate through first and second functional groups, the first functional groups comprise thiol groups, and the second functional groups comprise epoxy groups or carboxylic groups. ### Claim 9 (depends on 8) The heat sink of claim 8, wherein the polymer shells of the heat dissipation coating material are bonded to the surface of the substrate through cross-linking based on the first and second functional groups. ### Claim 10 (depends on 8) The heat sink of claim 8, wherein the substrate comprises a metal. ### Claim 11 (depends on 8) The heat sink of claim 8, wherein a thickness of the heat dissipation coating material is equal to or less than about 35 μm. ### Claim 12 A method of forming a heat sink, comprising: grafting a plurality of polymer chains onto a surface of a carbon particle, wherein each polymer chain has a first functional group, and the first functional groups comprise epoxy groups or carboxylic groups; replacing a portion of the first functional groups of the polymer chains with second functional groups, so as to form a modified carbon particle, wherein the second functional groups comprise thiol groups; covering a plurality of the modified carbon particles on a surface of a substrate; and adding a cross-linking agent on the surfaces of the carbon particles and carrying out a cross-linking reaction to form a heat dissipation layer on the substrate. ### Claim 13 (depends on 12) The method of claim 12, wherein the substrate comprises a metal. ### Claim 14 (depends on 12) The method of claim 12, wherein each polymer chain comprises polyglycidyl methacrylate (PGMA), 2-(4-vinylphenyl)oxirane, or polyacrylic acid. ### Claim 15 (depends on 12) The method of claim 12, wherein the carbon particles are selected from the group consisting of carbon nanotubes, diamond particles, graphite powder, carbon black, carbon fibers, graphenes and mixtures thereof. ### Claim 16 (depends on 12) The method of claim 12, wherein the carbon particles account for about 80-99 wt % of the heat dissipation layer. ### Claim 17 (depends on 12) The method of claim 12, wherein a thickness of the heat dissipation layer is equal to or less than about 35 μm.