Method of Manufacturing Thermal Module

Abstract

In a method of manufacturing a thermal module consisting radiating fins and heat pipes made of two different metal materials, the radiating fins are subjected to physical vapor deposition to form localized deposited coating, and the heat pipes are applied at areas to be welded to the radiating fins with a welding flux; the welding flux is then heated to its melting point, so as to weld the heat pipes to the radiating fins to form the thermal module. With the localized deposited coating on the radiating fins, heat pipes and radiating fins made of different metal materials can be firmly welded at the coated areas to ensure good welding joints and heat conducting efficiency of the completed thermal module.

1 . A method of manufacturing thermal module, comprising the following steps:
 providing a material for making radiating fins;   forming a localized deposited coating on predetermined areas on the radiating fin material using the physical vapor deposition (PVD) process; and   connecting the radiating fins to heat pipes for forming a thermal module, applying a welding flux over areas on the heat pipes to be welded to the radiating fins, and heating the welding flux to a melting point thereof to weld the heat pipes to the radiating fins;   whereby, with the localized deposited coating on the radiating fins, heat pipes and radiating fins made of different metal materials can be firmly welded at the coated areas to ensure good welding joints and heat conducting efficiency of the completed thermal module.   
   
   
       2 . The method of manufacturing thermal module as claimed in  claim 1 , wherein the material for forming the radiating fins is a material with thermal conductivity. 
   
   
       3 . The method of manufacturing thermal module as claimed in  claim 2 , wherein the material with thermal conductivity is an aluminum material. 
   
   
       4 . The method of manufacturing thermal module as claimed in  claim 2 , wherein the material with thermal conductivity is a copper material. 
   
   
       5 . The method of manufacturing thermal module as claimed in  claim 1 , wherein the material for forming the heat pipes is a material with thermal conductivity. 
   
   
       6 . The method of manufacturing thermal module as claimed in  claim 5 , wherein the material with thermal conductivity is a copper material. 
   
   
       7 . The method of manufacturing thermal module as claimed in  claim 1 , wherein the physical vapor deposition process is a sputtering deposition process. 
   
   
       8 . The method of manufacturing thermal module as claimed in  claim 1 , wherein the welding flux is a soldering tin. 
   
   
       9 . The method of manufacturing thermal module as claimed in  claim 1 , wherein the localized deposited coating is a nickel coating.