Vapor chamber and upper housing thereof

Abstract

In a vapor chamber and an upper housing, the vapor chamber includes a lower housing, an upper housing and a working fluid. The upper housing is sealed with the lower housing correspondingly. A chamber is formed to circumference between the upper housing and the lower housing. The upper housing includes a substrate and a plurality of heat dissipating fins. The substrate includes an outer surface and an inner wall formed on a rear side of the outer surface. Each one of the heat dissipating fins extends from the outer surface and is integrally formed thereon, and the inner wall includes a fluid retaining structure formed thereon. The working fluid is filled into the chamber. Therefore, all water molecules condensed can be uniformly dropped onto the heated portion of the lower housing.

What is claimed is: 
     
         1 . A vapor chamber, comprising:
 a lower housing;   an upper housing, correspondingly sealed onto the lower housing, having a chamber formed to circumference between the upper housing and the lower housing, the upper housing comprising a substrate and a plurality of heat dissipating fins, the substrate having an outer surface and an inner wall formed on a rear side of the outer surface, each one of the heat dissipating fins being extended from the outer housing and integrally formed thereon, the inner wall having a fluid retaining structure formed thereon; and   a working fluid filled into the chamber.   
     
     
         2 . The vapor chamber according to  claim 1 , wherein the fluid retaining structure is a rough surface constructed by a plurality of protruding and indented points. 
     
     
         3 . The vapor chamber according to  claim 2 , wherein a surface roughness value of the rough surface is between Ra0.01˜10(mm). 
     
     
         4 . The vapor chamber according to  claim 3 , wherein the surface roughness value is between Ra0.05˜3(mm). 
     
     
         5 . The vapor chamber according to  claim 2 , wherein the fluid retaining structure is formed by mechanical machining process or chemical etching process. 
     
     
         6 . The vapor chamber according to  claim 5 , wherein the mechanical machining process is a sand blasting process or a knurling process. 
     
     
         7 . The vapor chamber according to  claim 1 , wherein each one of the heat dissipating fins is formed to space apart from one another by an extrusion process or a cutting process. 
     
     
         8 . The vapor chamber according to  claim 1 , further comprising a capillary structure, and the capillary structure being disposed at an internal of the lower housing. 
     
     
         9 . The vapor chamber according to  claim 8 , wherein the capillary structure is a metal mesh, a porous metal powder sintering article or a fiber bundle. 
     
     
         10 . An upper structure of a vapor chamber, comprising a substrate and a plurality of heat dissipating fins, the substrate having an outer surface and an inner surface formed on a rear side of the outer surface, each one of the heat dissipating fins being extended from the outer surface and integrally formed thereon, the inner wall having a fluid retaining structure formed thereon. 
     
     
         11 . The vapor chamber according to  claim 10 , wherein the fluid retaining structure is a rough surface constructed by a plurality of protruding and indented points. 
     
     
         12 . The vapor chamber according to  claim 11 , wherein a surface roughness value of the rough surface is between Ra0.01˜10(mm). 
     
     
         13 . The vapor chamber according to  claim 12 , wherein the surface roughness value is between Ra0.05˜3(mm). 
     
     
         14 . The vapor chamber according to  claim 11 , wherein the fluid retaining structure is formed by mechanical machining process or chemical etching process. 
     
     
         15 . The vapor chamber according to  claim 14 , wherein the mechanical machining process is a sand blasting process or a knurling process. 
     
     
         16 . The vapor chamber according to  claim 10 , wherein each one of the heat dissipating fins is formed to space apart from one another by an extrusion process or a cutting process.