Heat sink

• US 10,677,535 B1
• Filed: 01/31/2020
• Issued: 06/09/2020
• Est. Priority Date: 11/30/2018
• Status: Active Grant

• Current Assignee: Furukawa Electric Company Limited
• Original Assignee: Furukawa Electric Company Limited
• Inventors: Kawabata, Kenya, Sasaki, Yasumi, Watanabe, Yosuke
• Primary Examiner(s): Rojohn, III, Claire E
• Application Number:
  US16/779,286
• Publication Number:
  US 20200173731A1
• Time in Patent Office: 130 Days
• Field of Search: 16510426
• CPC Class Codes: F28D 15/0233 the conduits having a particular shape, e.g. non-circular cross-section, annular F28D15/0241, F28D15/0266 take precedence
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28D 15/04 with tubes having a capillary structure
• CPC Class Codes: F28F 1/32 the means having portions engaging further tubular elements
• CPC Class Codes: F28F 2215/00 Fins
• CPC Class Codes: H01L 23/34 Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements thermal treatment apparatus H01L21/00
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• CPC Class Codes: H01L 23/427 Cooling by change of state, e.g. use of heat pipes by liquefied gas H01L23/445
• CPC Class Codes: H05K 7/20336 Heat pipes, e.g. wicks or capillary pumps

Abstract

An object of the present disclosure is to provide a heat sink that can equalize heat input in a heat receiving portion and increase a volume of the heat receiving portion, prevent an increase in heat resistance in the heat receiving portion even when a heat generation amount from a heat-generating element increases, and exhibit excellent cooling performance with respect to a cooling target.

There is provided a heat sink including: a heat transport member having a heat receiving portion thermally connected to a heat-generating element; a tube body connected to a heat insulating portion or a heat radiating portion of the heat transport member; and a heat radiation fin group which is thermally connected to the tube body and in which a plurality of heat radiation fins are arranged, in which the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the tube body and is sealed with a working fluid, and the internal space of the heat transport member communicates with an internal space of the tube body.

Claims

1. A heat sink comprising:

a heat transport member having a heat receiving portion thermally connected to a heating element;

a tube body connected to a heat insulating portion or a heat radiating portion of the heat transport member; and

a heat radiation fin group which is thermally connected to the tube body and in which a plurality of heat radiation fins are arranged, wherein

the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the tube body and is sealed with a working fluid, and the internal space of the heat transport member communicates with an internal space of the tube body,

a wick structure provided on the heat transport member is connected to a wick structure provided in the tube body via a connection member that is a wick member having a capillary force, and

the wick structure provided on the heat transport member, the wick structure provided in the tube body, and the wick member are different in type from each other, and the wick structure provided in the tube body is a plurality of fine grooves formed in an inner surface of the tube body.

2. The heat sink according to claim 1, wherein the tube body extends along an arrangement direction of the heat radiation fins.

3. The heat sink according to claim 1, wherein an extending direction of the tube body is not parallel to a heat transport direction of the heat transport member.

4. The heat sink according to claim 1, wherein a plurality of the tube bodies are provided and extend from the heat transport member in a plurality of directions.

5. The heat sink according to claim 1, wherein an extending direction of the tube body is parallel to a heat transport direction of the heat transport member.

6. The heat sink according to claim 1, wherein

a dimension in a direction orthogonal to a heat transport direction of the heat transport member in the heat receiving portion is larger than a dimension in the direction orthogonal to a heat transport direction of the heat transport member at a part to which the tube body is connected.

7. The heat sink according to claim 1, wherein at least one surface of the heat transport member has a planar shape.

8. The heat sink according to claim 1, wherein the heat receiving portion of the heat transport member has a flat shape.