HEAT SINK AND COOLING DEVICE

• US 20190311970A1
• Filed: 05/30/2017
• Published: 10/10/2019
• Est. Priority Date: 06/07/2016
• Status: Active Application

• Current Assignee: Showa Denko KK
• Original Assignee: Showa Denko KK
• Inventors: MINAMI, Kazuhiko
• Application Number:
  US16/307,596
• Publication Number:
  US 20190311970A1
• Time in Patent Office: Days
• CPC Class Codes: B23P 15/26 heat exchangers or the like making heat exchangers by methods covered by other subclasses B21D53/02
• CPC Class Codes: H01L 21/4871 Bases, plates or heatsinks
• CPC Class Codes: H01L 23/36 Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks H01L23/28, H01L23/40, H01L23/42, H01L23/44, H01L23/46 take precedence; heating H01L23/345
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• CPC Class Codes: H01L 23/373 Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
• CPC Class Codes: H01L 23/3733 having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh, porous structures H01L23/3732, H01L23/3737 take precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 7/20 Modifications to facilitate cooling, ventilating, or heating

Abstract

A heat sink (1A) is made of a composite material of aluminum and carbon particles (5). A plurality of fin portions (3) is integrally formed on a base plate portion (2) of the heat sink (1A) so as to protrude with respect to the base plate portion (2). The carbon particles (5) present in the fin portion (3) are oriented in the protrusion direction (P) of the fin portion (3) with respect to the base plate portion (2).

Claims

1. A heat sink made of a composite material of aluminum and carbon particles,

wherein a plurality of fin portions is integrally formed on a base plate portion so as to protrude with respect to the base plate portion, and

wherein the carbon particles present in the fin portion are oriented in a protrusion direction of the fin portion with respect to the base plate portion.

2. The heat sink as recited in claim 1,

wherein scaly graphite particles are used as the carbon particles.

3. A cooling device provided with the heat sink as recited in claim 1.

4. A production method of a heat sink, comprising:

subjecting a forging material composed of a composite material of aluminum and carbon particles to a hot forging process to form the heat sink as recited in claim 1.

5. A production method of a heat sink,

wherein the heat sink as recited in claim 2 is formed by an extruded article obtained by extruding a billet composed of a composite material of aluminum and carbon particles.