Planar heat pipe

Abstract

The planar heat pipe includes a metallic tube composed of two flat extensions and a shrinked intermediate structure, a wick structure, a working fluid and a support element. The flat extensions are separately located at two ends of the metallic tube. The intermediate structure connects between the flat extensions. The wick structure is arranged in the metallic tube. The working fluid is injected in the metallic tube and attached in the wick structure. The support element is disposed in the metallic tube for supporting the wick structure.

What is claimed is: 
     
         1 . A planar heat pipe comprising:
 a metallic tube composed of two flat extensions located at two ends thereof and a shrinked intermediate structure connecting between the flat extensions;   a wick structure arranged in the metallic tube;   a working fluid in the metallic tube; and   a support element in the metallic tube for supporting the wick structure to attach the metallic tube.   
     
     
         2 . The planar heat pipe of  claim 1 , wherein the metallic tube is made of copper. 
     
     
         3 . The planar heat pipe of  claim 1 , further comprising two tapering portions formed between the intermediate structure and the extensions. 
     
     
         4 . The planar heat pipe of  claim 1 , further comprising a turn formed in the intermediate structure. 
     
     
         5 . The planar heat pipe of  claim 1 , wherein the intermediate structure is flat in shape. 
     
     
         6 . The planar heat pipe of  claim 1 , wherein the wick structure is sintered powder.