Method for manufacturing two-phase flow heat sink

Abstract

The present invention relates to a method for manufacturing a two-phase flow heat sink. The two-phase flow heat sink comprises an evaporation chamber and a capillary layer. The material of the capillary layer, which has at least a porous structure, is cooled and disposed on the inner side of the evaporation chamber from a melted state. The method first sprays the thermally melted material of the capillary layer on the substrate of the evaporation chamber for forming the capillary layer on the substrate. Because the capillary layer is sprayed on the substrate of the evaporation chamber, the capillary layer is distributed irregularly on the substrate and forming irregularly distributed holes. Thereby, the flowing space for fluids in the evaporation chamber is increased, and hence enhancing the heat transfer efficiency of the heat sink.

1 . A method for manufacturing a two-phase flow heat sink, comprising steps of:
 providing a substrate;   spraying a capillary layer on a surface of said substrate using a melting injection process, and said capillary layer having at least a porous structure; and   forming a two-phase flow heat sink according to said substrate and said capillary layer.   
     
     
         2 . The method for manufacturing a two-phase flow heat sink of  claim 1 , and further comprising steps of:
 vacuuming said two-phase flow heat sink;   filling a working fluid to said two-phase flow heat sink; and   sealing said two-phase flow heat sink.   
     
     
         3 . The method for manufacturing a two-phase flow heat sink of  claim 2 , and further comprising a step of bonding said capillary layer and said substrate after said step of spraying said capillary layer on said surface of said substrate using said melting injection process. 
     
     
         4 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said melting injection process includes plasma melting injection, arc melting injection, fire melting injection, and high-speed fire melting injection. 
     
     
         5 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said porous structure is a net structure. 
     
     
         6 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said porous structure is a fiber-bundle structure. 
     
     
         7 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said porous structure includes a plurality of trenches. 
     
     
         8 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said porous structure includes a plurality of powders. 
     
     
         9 . The method for manufacturing a two-phase flow heat sink of  claim 1 , wherein said capillary layer is a trench-shaped, needle-shaped, or grid-shaped structure.