Vapor chamber and method for manufacturing the same

Abstract

A vapor chamber includes a heat absorbing plate and a heat dissipating plate attached to the heat absorbing plate. The heat absorbing plate includes a wick structure thereon facing the heat dissipating plate. The wick structure defines a plurality of first grooves and a plurality of second grooves intersecting the first grooves. The heat dissipating plate forms a hermetically sealed container in cooperation with the heat absorbing plate. The hermetically sealed container receives the wick structure therein. Working fluid is sealed inside the container and flows in the first grooves and the second grooves.

1 . A vapor chamber comprising:
 a heat absorbing plate for contacting a heat-generating component, the heat absorbing plate comprising a wick structure thereon, the wick structure defining a plurality of first grooves and a plurality of second grooves intersecting the first grooves;   a heat dissipating plate attached on the heat absorbing plate, and forming a hermetically sealed container in cooperation with the heat absorbing plate, the hermetically sealed container receiving the wick structure; and   working fluid being sealed inside the container and flowing in the first grooves and the second grooves.   
     
     
         2 . The vapor chamber of  claim 1 , wherein each of the first grooves is approximately perpendicular to the second grooves. 
     
     
         3 . The vapor chamber of  claim 1 , wherein each of the first grooves and the second grooves has a substantially V-shaped cross-section. 
     
     
         4 . The vapor chamber of  claim 1 , wherein each of the first grooves and the second grooves has a substantially rectangular cross-section. 
     
     
         5 . The vapor chamber of  claim 1 , further comprising an additional wick structure in the container and tightly attached to the heat dissipating plate. 
     
     
         6 . The vapor chamber of  claim 5 , wherein the additional wick structure is metal powders or waved metal wires. 
     
     
         7 . The vapor chamber of  claim 1 , wherein a protrusion integrally extends from the heat absorbing plate toward the heat dissipating plate, the first grooves and the second grooves of the wick structure are defined at the protrusion. 
     
     
         8 . The vapor chamber of  claim 7 , wherein the heat dissipating plate comprises a top plate and two sidewalls extending down from edges of the top plate, the sidewalls soldered in place to edges of the heat absorbing plate. 
     
     
         9 . A method for manufacturing a vapor chamber, the method comprising:
 providing an aluminum heat absorbing plate extruded to define a plurality of first grooves thereon;   machining a plurality of second grooves on the heat absorbing plate and intersecting the first grooves;   providing a heat dissipating plate and soldering the heat dissipating plate on the heat absorbing plate to form a container; and   filling the container with working liquid and sealing the container.   
     
     
         10 . The method of  claim 9 , wherein each of the first grooves is approximately perpendicular to the second grooves. 
     
     
         11 . The method of  claim 9 , wherein each of the first grooves and the second grooves has a substantially V-shaped cross-section. 
     
     
         12 . The method of  claim 9 , wherein each of the first grooves and the second grooves has a substantially rectangular cross-section.