Heat sink

• US 7,174,955 B2
• Filed: 12/20/2004
• Issued: 02/13/2007
• Est. Priority Date: 08/10/2004
• Status: Expired due to Fees

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: Li, Tao, Zhong, Yong, Xia, Wan-Lin
• Primary Examiner(s): DUONG, THO V
• Application Number:
  US11/018,070
• Publication Number:
  US 20060076121A1
• Time in Patent Office: 785 Days
• Field of Search: 165/185, 165/104.33, 165/104.34, 165/80.3, 165/76, 165/78, 361702-704, 361709-710, 174/16.3
• US Class Current: 165/185
• 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 (10) includes a plurality of fins (12) joined with each other. In one embodiment, each fin includes a main body (13) with an elongated flange (14) and two shortened flanges (16) extending from each of two opposite sides thereof. The shortened flanges extend from the body in an opposite direction to the elongated flange with the elongated flange located therebetween. The elongated flange (14) defines two holes (142) at respective opposite sides thereof and each shortened flange (16) provides an engaging piece (164) in alignment with one hole of the elongated flange. The engaging pieces of one fin engage in corresponding holes of an adjacent fin to thereby combine the fins together.

Claims

1. A heat sink comprising a plurality of cooling fins stacked between two opposite outmost cooling fins and a base attachable to said cooling fins, each of the plurality of cooling fins comprising a main body, wherein at least one side edge of the main body is provided with at least two flanges extending in opposite directions from the main body and successively arranged along a width direction of the main body, one flange defines a hole therein and the other flange has a connecting piece formed therefrom, the free end of the connecting piece forms an engaging piece in alignment with said hole, and the engaging piece of each of the plurality of coaling fins engages in the hole of an adjacent cooling fin whereby the plurality of cooling fins are fastened and joined with each other and wherein the at least two flanges are provided at each of two opposite side edges of the main body, the at least two flanges comprise a first flange and a second flange disposed adjacent to one side of the first flange, the connecting piece projects above the flange from which the connecting piece forms and the base defines a groove for receiving the connecting piece therein when attached thereto to allow the flange to thermally engage with the base.

2. The heat sink of claim 1, wherein the second flange is disposed at a corner of the main body.

3. The heat sink of claim 1, wherein the hole is defined in the first flange and the connecting piece is integrally formed from the second flange.

4. The heat sink of claim 1, wherein the hole is defined in the second flange and the connecting piece is integrally formed from the first flange.