Method for manufacturing heat sink having heat-dissipating fins and structure of the same

Abstract

A method for manufacturing a heat sink having heat-dissipating fins and a structure of the same are provided. The method includes the steps of: providing a substrate comprising a center portion and a plurality of extending arms, a gap being provided between each two adjacent extending arms; providing a plurality of heat-dissipating fins, the heat-dissipating fins being inserted into the gaps between the extending arms, each heat-dissipating fin comprising a base piece and two heat-dissipating plates; and bending and pressing each extending arm of the substrate with one of the two opposite side walls of each extending arm abutting against one of the two opposite surface of each heat-dissipating plate. Via the above arrangement, the present invention has an effect of avoiding the heat transfer loss.

What is claimed is: 
     
         1 . A structure of a heat sink having heat-dissipating fins, comprising:
 a substrate comprising a center portion and a plurality of extending arms, the center portion having a top surface, a bottom surface and two side walls, the extending arms extending from the side walls of the center portion with two gaps respectively provided between each extending arm and two adjacent extending arms; and   a plurality of heat-dissipating fins each comprising a base piece and heat-dissipating plates connected on both sides of the base piece, each heat-dissipating plate having a top end and a bottom end, both heat-dissipating plates of each heat-dissipating fin being inserted into the gaps between the corresponding extending arm and two adjacent extending arms, one of the two opposite side walls of each extending arm abutting against one of the two opposite surfaces of each heat-dissipating plate, the top and bottom ends of the two heat-dissipating plates of each heat-dissipating fin protruding from the top and bottom surfaces of the substrate.   
     
     
         2 . The structure of a heat sink having heat-dissipating fins according to  claim 1 , wherein the center portion is a circular plate.