# US 2025/0146136 A1 · Graphite structure and method for manufacturing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0146136 A1 - Document ID: US20250146136A1 - Status: Published application - Kind: A1 - Application number: 19/015,789 - Filed: 2025-01-10 - Published: 2025-05-08 - Earliest claimed: 2022-07-22 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: TAKASHI TSURUTA; RYOU KUWABARA; NAOMI NISHIKI - Web page: https://patentgrep.com/patent/US20250146136A1 ## CPC - C23C 28/023: {only coatings of metal elements only} - F28F 13/18: by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing - H05K 7/20445: {the coupling element being an additional piece, e.g. thermal standoff} - H10W 40/10: Arrangements for heating - H10W 40/25: characterised by their materials - 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 (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - 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 ## Abstract Provided are a graphite plate including at least one or more through-holes passing through the graphite plate in a direction orthogonal to a basal surface of the graphite plate, a coating layer covering an inner peripheral surface of the at least one through-hole and an entire circumference of the graphite plate, the coating layer including a first metal capable of forming a compound with carbon atoms constituting the graphite plate, a porous second metal covering an entire circumference of the coating layer including a region surrounded by the inner peripheral surface of the at least one through-hole, and a third metal covering an entire circumference of the porous second metal, the graphite plate and the porous second metal being bonded to each other with the coating layer interposed the graphite plate and the porous second metal, and the third metal being bonded to the porous second metal. ## Claims ### Claim 1 A graphite structure comprising: a graphite plate including at least one through-hole passing through the graphite plate in a direction orthogonal to a basal surface of the graphite plate; a coating layer covering an inner peripheral surface of the at least one through-hole and an entire circumference of the graphite plate, the coating layer including a first metal capable of forming a compound with carbon atoms constituting the graphite plate; a porous second metal covering an entire circumference of the coating layer including a region surrounded by the inner peripheral surface of the at least one through-hole; and a third metal covering an entire circumference of the porous second metal, the graphite plate and the porous second metal being bonded to each other with the coating layer interposed between the graphite plate and the porous second metal, and the third metal being bonded to the porous second metal. ### Claim 2 (depends on 1) The graphite structure according to claim 1, wherein the at least one through-hole has a total area in a range from 5% to 50% inclusive with respect to an area of the graphite plate, and a maximum area per one through-hole is in a range from 5% to 50% inclusive with respect to the area of the graphite plate. ### Claim 3 (depends on 1) The graphite structure according to claim 1, wherein the coating layer contains any one of metals of nickel and titanium, or an alloy containing the any one of metals as a main component, as the first metal, the coating layer being formed over the inner peripheral surface of the at least one through-hole and the entire circumference of the graphite plate while having a thickness in a range from 0.01 μm to 20 μm inclusive. ### Claim 4 (depends on 1) The graphite structure according to claim 1, wherein the porous second metal is copper or an alloy containing copper as a main component, and the porous second metal is formed over the entire circumference of the coating layer while having a thickness in a range from 0.01 mm to 0.5 mm inclusive, and a porosity in a range from 5% to 30% inclusive. ### Claim 5 (depends on 1) The graphite structure according to claim 1, wherein the third metal is copper or an alloy containing copper as a main component, and the third metal is formed covering an outer periphery of the porous second metal while having a thickness in a range from 1 μm to 100 μm inclusive and causing an outside from the graphite plate to be formed of the third metal bonded. ### Claim 6 A method for manufacturing a graphite structure, the method comprising the steps of: machining a through-hole in a graphite plate; covering an inner peripheral surface of the through-hole and an entire circumference of the graphite plate with a first metal capable of forming a compound with carbon atoms constituting the graphite plate; covering an entire circumference of a coating layer of the first metal coating the graphite plate with a porous second metal, the coating layer including a region surrounded by the inner peripheral surface of the through-hole; and covering an entire circumference of the porous second metal with a third metal.