# US 2020/0393201 A1 · Heatsink > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0393201 A1 - Document ID: US20200393201A1 - Status: Published application - Kind: A1 - Application number: 17/009,206 - Filed: 2020-09-01 - Published: 2020-12-17 - Earliest claimed: 2019-04-17 - Assignees: Furukawa Electric Co., Ltd. - Applicants: Furukawa Electric Co., Ltd. - Inventors: Yosuke WATANABE; Kenya KAWABATA; Yoshikatsu INAGAKI; Tatsuro MIURA; Kazuaki AOTANI; Toshiaki NAKAMURA - Web page: https://patentgrep.com/patent/US20200393201A1 ## CPC - F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence)} - H10W 40/73: for cooling by change of state - F28D 15/0275: {Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores} - F28D 15/046: {characterised by the material or the construction of the capillary structure} - F28F 1/28: the element being built-up from finned sections - F28F 3/025: {the means being corrugated, plate-like elements} - F28D 2021/0029: {Heat sinks} - F28F 2215/00: Fins - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract The present disclosure provides a heatsink that can increase a fin area of a heat radiating fin while securing sufficient volumes of a heat receiving portion, heat insulating portion, and heat radiating portion even in an environment in which an installation space for the heatsink, more specifically, an installation space in a height direction of the heatsink is limited. A heatsink including: a heat transport member having a heat receiving portion thermally connected to a heating element; a pipe body connected to a heat radiating portion of the heat transport member; and a heat radiating fin group which is thermally connected to the pipe body and in which a plurality of heat radiating fins is arranged, wherein the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the pipe body and that is filled with a working fluid, the internal space of the heat transport member communicating with an internal space of the pipe body, and a cross-sectional area of an internal space in a direction orthogonal to a heat transport direction of the heat transport member in the heat radiating portion is smaller than the cross-sectional area in a heat insulating portion between the heat receiving portion and the heat radiating portion. ## Claims ### Claim 1 A heatsink comprising: a heat transport member having a heat receiving portion thermally connected to a heating element; a pipe body connected to a heat radiating portion of the heat transport member; and a heat radiating fin group which is thermally connected to the pipe body and in which a plurality of heat radiating fins is arranged, wherein the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the pipe body and that is filled with a working fluid, the internal space of the heat transport member communicating with an internal space of the pipe body, a cross-sectional area of an internal space in a direction orthogonal to a heat transport direction of the heat transport member in the heat radiating portion is smaller than the cross-sectional area in a heat insulating portion between the heat receiving portion and the heat radiating portion, a wick structure extended from the heat receiving portion to the heat radiating portion is provided in the internal space of the heat transport member, a different wick structure is provided in an inner surface of the pipe body, and the wick structure and the different wick structure are connected via a connection member having capillary force, the connection member being a wick member having capillary force, and a kind of the wick structure provided in the heat transport member, a kind of the different wick structure provided in the pipe body, and a kind of the wick member are different. ### Claim 2 (depends on 1) The heatsink according to claim 1, wherein the cross-sectional area in the heat receiving portion is the same as the cross-sectional area in the heat insulating portion. ### Claim 3 (depends on 1) The heatsink according to claim 1, wherein the cross-sectional area in the heat receiving portion is larger than the cross-sectional area in the heat insulating portion. ### Claim 4 (depends on 1) The heatsink according to claim 1, wherein the pipe body is extended in an arrangement direction of the heat radiating fins. ### Claim 5 (depends on 1) The heatsink according to claim 1, wherein an extension direction of the pipe body is not parallel to the heat transport direction of the heat transport member. ### Claim 6 (depends on 1) The heatsink according to claim 1, wherein a plurality of the pipe bodies is provided and is extended in a plurality of directions from the heat transport member. ### Claim 7 (depends on 1) The heatsink according to claim 1, wherein at least one surface of the heat transport member has a planar shape. ### Claim 8 (depends on 1) The heatsink according to claim 1, wherein the heat transport member has a step portion in a direction orthogonal to the heat transport direction. ### Claim 9 (depends on 1) The heatsink according to claim 1, wherein the different wick structure provided in the pipe body is a plurality of narrow grooves formed in the inner surface of the pipe body.