Heat sink

• US 6,749,011 B2
• Filed: 08/09/2002
• Issued: 06/15/2004
• Est. Priority Date: 08/09/2002
• Status: Expired due to Fees

• Current Assignee: Sunonwealth Electric Machine Industry Company Limited
• Original Assignee: Sunonwealth Electric Machine Industry Company Limited
• Inventors: Horng, Alex, Horng, Ching-Sheng, Hong, Yin-Rong
• Primary Examiner(s): FLANIGAN, ALLEN J
• Application Number:
  US10/214,564
• Publication Number:
  US 20040026073A1
• Time in Patent Office: 676 Days
• Field of Search: 165/80.3, 165/182, 165/185, 361/704, 361/710, 361/697
• US Class Current: 165/80.3
• CPC Class Codes: F28F 1/30 the means being attachable to the element F28F1/32 takes precedence
• CPC Class Codes: F28F 3/02 Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations F28F3/08 takes precedence
• CPC Class Codes: H01L 23/3672 Foil-like cooling fins or heat sinks being part of lead-frames H01L23/49568
• 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

Abstract

A heat sink. The heat sink includes spaced laminas made of a thermally conductive material. Each of the laminas is integrally formed with a pair of convexo-concave spacers that each project from a first face of the lamina and define a cavity in a second face of the same lamina. Furthermore, each of the convexo-concave spacers is adapted to be partially and tightly fitted in a mating cavity of the next lamina.

Claims

1. A heat sink comprising:

a plurality of spaced laminas made of a thermally conductive material, each of said laminas being integrally formed with at least one convexo-concave spacer having a tapered configuration projecting from a first face of said lamina and defining a cavity in a second face of said lamina, and said convexo-concave spacer being adapted to be partially and tightly fitted in a mating cavity of the next lamina;

wherein each of said laminas has an opening for receiving a heat conductor, and a vent array for additional heat dissipation; and

wherein each of said laminas further comprises a collar surrounding said opening and in contact with said heat conductor.

2. The heat sink as claimed in claim 1, wherein said convexo-concave spacer has a small-diameter end adapted to be tightly fitted in a mating cavity of said next lamina.

3. A The heat sink as claimed in claim 1, wherein said convexo-concave spacer is adapted to be partially and tightly fitted in a mating cavity of said next lamina.

4. The heat sink as claimed in claim 3, wherein said convexo-concave spacer has an outer periphery tapered in the same way as said cavity.

5. The heat sink as claimed in claim 1, wherein each of said laminas has an angled edge in thermal contact with a heat conductor plate.

6. The heat sink as claimed in claim 1, wherein each of said laminas has a plurality of vents defined therein.