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

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.