Heat spreader with vapor chamber and method for manufacturing the same

Abstract

A method for manufacturing a heat spreader includes steps of: providing an elongated and flat sectional material with a through hole defined therein; cutting the sectional material into a plurality of parts each in a predetermined length to form a plurality of casings, wherein each of the casings defines a vapor chamber therein and has at least an opening in a side thereof; forming a wick structure on an inner face of the casing; providing a plurality of supporting members; placing and fixing the supporting members into the vapor chamber of the casing; and injecting working liquid into the vapor chamber and sealing the casing.

1 . A method for manufacturing a heat spreader comprising:
 providing an elongated and flat sectional material with a through hole defined therein;   cutting the sectional material into a plurality of parts each in a predetermined length to form a plurality of casings, and each of the casings defining a vapor chamber therein and having at least an opening in a side thereof;   forming a wick structure on an inner face of the casing;   providing a plurality of supporting members;   placing and fixing the supporting members into the vapor chamber of the casing; and   injecting working liquid into the vapor chamber and sealing the casing.   
     
     
         2 . The method as claimed in  claim 1 , wherein the casing comprises a base and a cover located above the base, and the supporting members are sandwiched between the base and the cover. 
     
     
         3 . The method as claimed in  claim 2 , wherein each of the supporting members has a column configuration and made of a metal with good heat conductivity. 
     
     
         4 . The method as claimed in  claim 2 , wherein two opposite ends of each supporting member are attached to the wick structure formed on the base and the cover of the casing. 
     
     
         5 . The method as claimed in  claim 2 , wherein each supporting member has a configuration of a helical spring. 
     
     
         6 . The method as claimed in  claim 5 , wherein an axis of each supporting member is perpendicular to the base and the cover of the casing. 
     
     
         7 . The method as claimed in  claim 2 , wherein the supporting members are sintered with the base and the cover of the casing. 
     
     
         8 . The method as claimed in  claim 2 , wherein the supporting members are soldered with the base and the cover of the casing. 
     
     
         9 . A heat spreader comprising:
 a plate-shaped casing defining a vapor chamber therein;   a working liquid contained in the vapor chamber;   a wick structure formed on an inner face of the casing and correspondingly surrounding the vapor chamber; and   a plurality of supporting members received in the vapor chamber of the casing.   
     
     
         10 . The heat spreader as claimed in  claim 9 , wherein the casing comprises a base and a cover located above the base, the supporting members are sandwiched between the base and the cover. 
     
     
         11 . The heat spreader as claimed in  claim 10 , wherein two opposite ends of each supporting member are attached to the wick structure formed on the base and the cover of the casing. 
     
     
         12 . The heat spreader as claimed in  claim 9 , wherein each of the supporting members has a column configuration and made of a metal with good heat conductivity. 
     
     
         13 . The heat spreader as claimed in  claim 9 , wherein each supporting member has a configuration of a helical spring. 
     
     
         14 . The heat spreader as claimed in  claim 13 , wherein the supporting members are disposed vertically in the vapor chamber of the casing. 
     
     
         15 . The heat spreader as claimed in  claim 9 , wherein the wick structure is selected from one of sintered metal powder, metal mesh, carbon nanotube array and bundle of fibers.