Heat sink

Abstract

A heat sink includes a substrate, a first heat dissipation body, and a second heat dissipation. The first heat dissipation body includes a first base plate attached to the substrate, and a number of first cooling fins extending from the first base plate. The second heat dissipation body includes a second base plate attached to tops of first cooling fins and a number of second cooling fins extending from the second base plate.

1 . A heat sink comprising:
 a substrate;   a first heat dissipation body comprising a first base plate extending up from the substrate and a plurality of first cooling fins extending up from the first base plate; and   a second heat dissipation body comprising a second base plate attached to tops of the first cooling fins of the first heat dissipation body and a plurality of second cooling fins extending up from the second base plate.   
     
     
         2 . The heat sink of  claim 1 , wherein the first base plate of the first heat dissipation body is substantially V-shaped. 
     
     
         3 . The heat sink of  claim 2 , wherein a plurality of third cooling fins extends horizontally from opposite sides of the first base plate of the first heat dissipation. 
     
     
         4 . The heat sink of  claim 1 , wherein the second base plate of the second heat dissipation body is substantially V-shaped. 
     
     
         5 . The heat sink of  claim 1 , wherein the heat sink is integrally made by aluminum extrusion.