Combination Heat Sink Formed of a Stack of Heat Spreader Sheet Members

Abstract

A combination heat sink formed of a stack of heat spreader sheet members is disclosed. Each heat spreader sheet member has a flat base panel two side flanges respectively perpendicularly extending along two opposite lateral sides of the flat base panel in a parallel manner, a plurality of narrow elongated notches respectively symmetrically formed on the two opposite lateral sides of the flat base panel, and a plurality of protruding positioning portions respectively formed of the side flanges in such a manner that when two heat spreader sheet members are attached together the protruding positioning portions of one heat spreader sheet member are inserted through the narrow elongated notches of the other heat spreader sheet member bent sideways and secured to the side flanges of the other heat spreader sheet member, and therefore the two stacked heat spreader sheet members are firmed secured together.

1 . A combination heat sink formed of a stack of heat spreader sheet members, each said heat spreader sheet member comprising a flat base panel and two side flanges respectively perpendicularly extending along two opposite lateral sides of said flat base panel in a parallel manner, wherein each said heat spreader sheet member comprises a plurality of narrow elongated notches respectively symmetrically formed on the two opposite lateral sides of the flat base panel thereof, and a plurality of protruding positioning portions respectively formed integral with the side flanges thereof corresponding to said narrow elongated notches in such a manner that the protruding positioning portions of one said heat spreader sheet member are respectively inserted through the narrow elongated notches of another said heat spreader sheet member and bent sideways to have said heat spreader sheet members be fastened together in a stack and the flat base panel of one said heat spreader sheet member be supported on the side flanges of another said heat spreader sheet member. 
   
   
       2 . The combination heat sink as claimed in  claim 1 , wherein each said heat spreader sheet member is a single-piece member 
   
   
       3 . The combination heat sink as claimed in  claim 1 , wherein each said heat spreader sheet member is formed of a copper sheet material. 
   
   
       4 . The combination heat sink as claimed in  claim 1 , wherein each said heat spreader sheet member is formed of an aluminum sheet material.