Heat sink and method for manufacturing the same

Abstract

A method for manufacturing a heat sink includes steps of: preparing a metallic belt; providing a spraying device for spraying a metallic coating layer on one surface of the metallic belt; providing a stamping device for blanking the metallic belt to form a heat-dissipating fin; and stacking a plurality of heat-dissipating fins to form the heat sink. In this way, the heat-dissipating area and efficiency of the heat sink can be increased. The stability and soldering ability of different materials can be improved. The present invention further provides a heat sink.

1 . A method for manufacturing a heat sink, including steps of:
 a) preparing a metallic belt;   b) providing a spraying device for spraying a metallic coating layer on one surface of the metallic belt;   c) providing a stamping device for blanking the metallic belt to form a heat-dissipating fin; and   d) stacking a plurality of heat-dissipating fins to form the heat sink.   
     
     
         2 . The method according to  claim 1 , wherein the heat-dissipating fin in the step c) is formed into a U shape having two folds corresponding to each other. 
     
     
         3 . The method according to  claim 2 , further including a step e) of providing a heat-conducting plate after the step d), the heat-dissipating fins being disposed on the heat-conducting plate. 
     
     
         4 . The method according to  claim 3 , further including a step f) of providing a heating device after the step e), the heating device heating the heat-dissipating fins and the heat-conducting plate, thereby connecting the heat-dissipating fins and the heat-conducting plate with the metallic coating layer. 
     
     
         5 . The method according to  claim 1 , wherein the heat-dissipating fin in the step c) is formed into a U shape having two folds corresponding to each other, one of the folds is formed with a trough. 
     
     
         6 . The method according to  claim 5 , further including a step e′) of providing a heat pipe after the step d), one end of the heat pipe penetrating the trough. 
     
     
         7 . The method according to  claim 6 , further including a step f′) of providing a heating device after the step e′), the heating device heating the heat-dissipating fins and the heat pipe, thereby connecting the heat-dissipating fins and the heat pipe with the metallic coating layer. 
     
     
         8 . A heat sink, including a plurality of heat-dissipating fins, wherein one surface of each of the heat-dissipating fins is sprayed to form a metallic coating layer, at least one end of any one of the heat-dissipating fins is bent to have a fold, any two adjacent heat-dissipating fins are connected to each other by stacking the respective folds. 
     
     
         9 . The heat sink according to  claim 8 , wherein the heat-dissipating fin is made of aluminum. 
     
     
         10 . The heat sink according to  claim 8 , wherein the metallic coating layer is made of copper or nickel. 
     
     
         11 . The heat sink according to  claim 8 , wherein the metallic coating layer is formed into a rugged configuration. 
     
     
         12 . The heat sink according to  claim 11 , further including a heat-conducting plate, the metallic coating layer being heated to be connected to the heat-conducting plate. 
     
     
         13 . The heat sink according to  claim 11 , further including a heat pipe, the heat-dissipating fin being formed with a trough, one end of the heat pipe being received in the trough, the metallic coating layer being heated to be connected to the heat pipe. 
     
     
         14 . The heat sink according to  claim 13 , further including a heat-conducting plate in thermal contact with the other end of the heat pipe.