# US 10,872,840 B2 · Thermal conductive sheet > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,840 B2 - Document ID: US10872840B2 - Status: Granted - Kind: B2 - Application number: 16/008,866 - Filed: 2018-06-14 - Published: 2019-07-25 - Granted: 2020-12-22 - Earliest claimed: 2018-01-19 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Niu Hu - Web page: https://patentgrep.com/patent/US10872840B2 ## CPC - B32B 27/281: {comprising polyimides} - H10W 40/25: characterised by their materials - B32B 3/08: characterised by added members at particular parts {(layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18)} - B32B 7/04: Interconnection of layers - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 15/08: of synthetic resin - B32B 15/09: comprising polyesters - B32B 15/20: comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} - B32B 27/36: comprising polyesters - C01B 32/205: Preparation - C08J 5/121: {by heating} - C08J 5/18: Manufacture of films or sheets - H05K 7/20: Modifications to facilitate cooling, ventilating, or heating - H05K 7/2039: {characterised by the heat transfer by conduction from the heat generating element to a dissipating body (arrangements for increasing/decreasing heat-transfer, e.g. fins details, F28F13/00)} - B32B 2250/02: 2 layers - B32B 2307/208: Magnetic, paramagnetic - B32B 2307/302: Conductive - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - H10W 40/251: {Organics} - H10W 40/70: Fillings or auxiliary members in containers or in encapsulations for thermal protection or control - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract The present invention provides with a thermal conductive sheet including a foldable layer having a bending region, a graphite sheet disposed on the foldable layer, and disposed outside the bending region, a first adhesive layer covered on the graphite sheet and the foldable layer, and a polymer film layer coated on the first adhesive layer. Accordingly, the present invention has a good heat dissipation effect, bendable and flexible in order to avoid a layer separation phenomenon. ## Claims ### Claim 1 A thermal conductive sheet comprising: a foldable layer having a bending region; a graphite sheet disposed on the foldable layer, and disposed outside the bending region; a first adhesive layer covered on the graphite sheet and the foldable layer; and a polymer film layer coated on the first adhesive layer; wherein the graphite sheet disposed outside the bending region of the foldable layer comprises an opening through which a surface of the bending region of the foldable layer is exposed, and wherein the first adhesive layer is partly filled in the opening of the graphite sheet to directly and adhesively contact the surface of the bending region of the foldable layer and the polymer film layer is fixed to the surface of the bending region of the foldable layer. ### Claim 2 (depends on 1) The thermal conductive sheet according to claim 1, wherein the graphite sheet is disposed at two sides of the bending region of the foldable layer. ### Claim 3 (depends on 2) The thermal conductive sheet according to claim 2, wherein the graphite sheet is provided with a heat dissipation hole. ### Claim 4 (depends on 3) The thermal conductive sheet according to claim 3, wherein the first adhesive layer is also filled in the heat dissipation hole and through the dissipation hole, the foldable layer and the graphite sheet are adhered together. ### Claim 5 (depends on 4) The thermal conductive sheet according to claim 4, wherein between the foldable layer and the graphite sheet, a second adhesive layer is provided to adhere the foldable layer and the graphite sheet together. ### Claim 6 (depends on 5) The thermal conductive sheet according to claim 5, wherein a material of the foldable layer is a copper foil. ### Claim 7 (depends on 6) The thermal conductive sheet according to claim 6, wherein a material of the polymer film layer is polyimide (PI) or polyethylene terephthalate (PET). ### Claim 8 A thermal conductive sheet comprising: a foldable layer having a bending region; a graphite sheet disposed on the foldable layer, and disposed outside the bending region; a first adhesive layer covered on the graphite sheet and the foldable layer; and a polymer film layer coated on the first adhesive layer; wherein the graphite sheet is provided with a heat dissipation hole; and wherein the graphite sheet disposed outside the bending region of the foldable layer comprises an opening through which a surface of the bending region of the foldable layer is exposed, and wherein the first adhesive layer is partly filled in the opening of the graphite sheet to directly and adhesively contact the surface of the bending region of the foldable layer and the polymer film layer is fixed to the surface of the bending region of the foldable layer. ### Claim 9 (depends on 8) The thermal conductive sheet according to claim 8, wherein the first adhesive layer is also filled in the heat dissipation hole and through the dissipation hole, the foldable layer and the graphite sheet are adhered together. ### Claim 10 (depends on 9) The thermal conductive sheet according to claim 9, wherein between the foldable layer and the graphite sheet, a second adhesive layer is provided to adhere the foldable layer and the graphite sheet together. ### Claim 11 (depends on 10) The thermal conductive sheet according to claim 10, wherein a material of the foldable layer is a copper foil. ### Claim 12 (depends on 11) The thermal conductive sheet according to claim 11, wherein a material of the polymer film layer is polyimide (PI) or polyethylene terephthalate (PET). ### Claim 13 A thermal conductive sheet comprising: a foldable layer having a bending region; a graphite sheet disposed on the foldable layer, and disposed outside the bending region; a first adhesive layer covered on the graphite sheet and the foldable layer; and a polymer film layer coated on the first adhesive layer; wherein between the foldable layer and the graphite sheet, a second adhesive layer is provided to adhere the foldable layer and the graphite sheet together; and wherein the graphite sheet disposed outside the bending region of the foldable layer comprises an opening through which a surface of the bending region of the foldable layer is exposed, and wherein the first adhesive layer is partly filled in the opening of the graphite sheet to directly and adhesively contact the surface of the bending region of the foldable layer and the polymer film layer is fixed to the surface of the bending region of the foldable layer. ### Claim 14 (depends on 13) The thermal conductive sheet according to claim 13, wherein a material of the foldable layer is a copper foil. ### Claim 15 (depends on 14) The thermal conductive sheet according to claim 14, wherein the graphite sheet is provided with a heat dissipation hole. ### Claim 16 (depends on 15) The thermal conductive sheet according to claim 15, wherein the graphite sheet is disposed at two sides of the bending region of the foldable layer. ### Claim 17 (depends on 16) The thermal conductive sheet according to claim 16, wherein a material of the polymer film layer is polyimide (PI) or polyethylene terephthalate (PET).