Thermal device for heat generating source

Abstract

A thermal device for cooling a heat generating source is provided, including a first portion and a second portion which is formed from the first portion, the area of the bottom of the second portion is smaller than the area of the bottom of the first portion, and the area of the bottom of the second portion accords with a contact surface area of the heat generating source.

1 . A thermal device for a heat generating package, comprising: 
 a plurality of fins; and    a base having a first portion and a second portion, the first portion supporting the plurality of fins, and the second portion formed from a bottom of the first portion, the area of a contacting surface of the second portion being less than that of the bottom of the first portion, and according with that of a contacting surface of the heat generating package.    
   
   
       2 . The thermal device as claimed in  claim 1 , further comprising at least a heat pipe extending from the base to the fins.  
   
   
       3 . The thermal device as claimed in  claim 2 , wherein a portion of the heat pipe is exposed where the second portion does not cover the bottom of the first portion.  
   
   
       4 . The thermal device as claimed in  claim 2 , wherein a hole is defined in the base for receiving the heat pipe, a top longitudinal portion of the hole is defined in the first portion, and a bottom longitudinal portion of the hole is defined in the second portion.  
   
   
       5 . The thermal device as claimed in  claim 1 , wherein both the first portion and the second portion are slab-shaped metal blocks.  
   
   
       6 . The thermal device as claimed in  claim 1 , wherein the second portion protrudes from the first portion.  
   
   
       7 . The thermal device as claimed in  claim 2 , wherein the heat pipe is U-shaped.  
   
   
       8 . A thermal device for cooling a heat generating source comprising: 
 a base with a cross section having a top dimension wider than a bottom dimension, the area of a contacting surface of the base according with a contacting surface of the heat generating source;    a plurality of fins extending from the base, and    at least a heat pipe extending from the base to the fins.    
   
   
       9 . The thermal device as claimed in  claim 8 , wherein the base includes a slab-shaped first portion and a slab-shaped second portion, the area of bottom of the second portion being smaller than the area of the bottom of the first portion.  
   
   
       10 . The thermal device as claimed in  claim 12 , wherein a hole is defined in the base for receiving the heat pipe, a top longitudinal portion of the hole is defined in the first portion, and a bottom longitudinal portion of the hole is defined in the second portion.  
   
   
       11 . The thermal device as claimed in  claim 8 , wherein the second portion protrudes from the first portion.  
   
   
       12 . The thermal device as claimed in  claim 8 , wherein the heat pipe is U-shaped.