Heat sink

Abstract

A heat sink includes a base board, a fin group, heat pipes, and a radiation plate. The fin group includes a plurality of fins arranged on the base board at right angles to the base board. Each of the heat pipes has the shape of the letter “U,” is arranged, on the whole, in parallel with each fin, and conducts heat from the base board to the radiation plate placed on the fin group. The base board and the radiation plate are thermally connected to each fin.

1 . A heat sink comprising:
 a base;   a fin group including a plurality of fins arranged on the base at right angles to the base:   at least one U-shaped heat pipe both straight portions of which are arranged in parallel with the plurality of fins and which conducts heat from the base to the plurality of fins; and   a radiation plate which is placed on the fin group and which is thermally connected to the plurality of fins.   
     
     
         2 . The heat sink according to  claim 1 , wherein:
 notches the shape of which corresponds to a curve in the heat pipe are cut in part of the plurality of fins; and   the curve in the heat pipe is placed in the notches.   
     
     
         3 . The heat sink according to  claim 1 , wherein the straight portions of the heat pipe are arranged at a determined angle with a longitudinal direction of each fin. 
     
     
         4 . The heat sink according to  claim 1 , wherein:
 the radiation plate has a groove corresponding to a straight portion of the heat pipe; and   the straight portion of the heat pipe is fitted into the groove.   
     
     
         5 . The heat sink according to  claim 1 , wherein:
 the base has a groove corresponding to a straight portion of the heat pipe; and   the straight portion of the heat pipe is fitted into the groove.