US 7,321,493 B2
Techniques for attaching a heatsink to a circuit board using anchors which install from an underside of the circuit board
Hsing-Sheng Liang, San Jose, Calif. (US); George Sya, Fremont, Calif. (US); Hong Huynh, Fremont, Calif. (US); Michael Koken, Sunnyvale, Calif. (US); Michael Chern, San Jose, Calif. (US); and Yuan-Cheng Fang, Chung-Ho (Taiwan)
Assigned to Cisco Technology, Inc., San Jose, Calif. (US)
Filed on Mar. 14, 2005, as Appl. No. 11/79,810.
Application 11/079810 is a continuation in part of application No. 11/001411, filed on Dec. 01, 2004.
Prior Publication US 2006/0114659 A1, Jun. 01, 2006
Int. Cl. H05K 7/20 (2006.01)
U.S. Cl. 361—719  [165/185; 257/719; 361/704; 361/710] 16 Claims
OG exemplary drawing
 
1. A circuit board module, comprising:
a circuit board;
a circuit board component mounted to the circuit board;
a heatsink; and
an attachment assembly for attaching the heatsink to the circuit board over the circuit board component, the assembly including:
a first anchor configured to secure to a first location of the circuit board,
a second anchor configured to secure to a second location of the circuit board, each of the first and second anchors including a set of legs, each leg having a looped end portion configured to contact the circuit board, and
a heatsink clip configured to concurrently (i) fasten to the first and second anchors when the first and second anchors secure to the first and second locations of the circuit board, and (ii) hold the heatsink to against the circuit board component of the circuit board;
wherein the looped end portion of each leg extends substantially 360 degrees or more around a central area defined by that looped end portion.