Heat sink with vapor chamber

Abstract

A heat sink includes a heat spreader for absorbing heat from a heat-generating source, a tank covering on the heat spreader and hermetically engaging with the heat spreader, a first wick layer formed on an inner face of the tank, a second wick layer formed on an inner face of the heat spreader, and a supporting member located between the tank and the heat spreader. A chamber is defined between the tank and the heat spreader and contains working fluid therein. The supporting member is arranged in a wave shape and supports the first wick layer and the second wick layer.

1 . A heat sink comprising:
 a heat spreader for absorbing heat from a heat-generating source;   a tank covering on the heat spreader and hermetically engaging with the heat spreader;   a chamber defined between the tank and the heat spreader and containing working fluid therein;   a first wick layer formed on an inner face of the tank;   a second wick layer formed on an inner face of the heat spreader; and   a supporting member located in the chamber between the tank and the heat spreader, the supporting member having a wave shape and supporting the first wick layer and the second wick layer.   
   
   
       2 . The heat sink of  claim 1 , wherein the supporting member is integrally made from a sheet, and defines a plurality of holes therein for the working fluid flowing therethrough. 
   
   
       3 . The heat sink of  claim 2 , wherein the supporting member divides the chamber into a plurality of cavities in communication with each other via the holes of the supporting member. 
   
   
       4 . The heat sink of  claim 3 , wherein the supporting member comprises a plurality of first supporting portions contacting the first wick layer, a plurality of second supporting portions contacting the second wick layer and a plurality of connecting portions interconnecting the first supporting portions and the second supporting portions, the plurality of hoes in the supporting member being defined in the connecting portions. 
   
   
       5 . The heat sink of  claim 1 , wherein the first wick layer is received in and in communication with the second wick layer. 
   
   
       6 . The heat sink of  claim 1 , wherein the tank comprises a body, the body comprising a central plate and a plurality of interconnecting sidewalls circumferentially extending from the central plate, the second wick layer comprising a central portion formed on the inner face of the heat spreader and a plurality of interconnecting side portions circumferentially extending from the central portion, the side portions of the second wick layer having outer faces adhered on the sidewalls of the body, the first wick layer being formed on the inner face of the central plate of the body. 
   
   
       7 . The heat sink of  claim 6 , wherein the tank further comprises a flange circumferentially extending from the body, the heat spreader having an edge thereof hermetically engaging with the flange of the tank. 
   
   
       8 . The heat sink of  claim 6 , wherein the first wick layer comprises a central portion formed on the inner face of the central plate of the body and a plurality of interconnecting side portions circumferentially extending from the central portion and engaging with inner faces of the side portions of the second wick layer. 
   
   
       9 . The heat sink of  claim 1 , wherein the first wick layer is a sintered wick layer. 
   
   
       10 . The heat sink of  claim 1 , wherein the second wick layer is a meshed wick layer. 
   
   
       11 . A heat sink comprising:
 a heat spreader;   a tank covering on the heat spreader and hermetically engaging with the heat spreader;   a chamber defined between the tank and the heat spreader and containing working fluid therein;   at least a wick layer formed on an inner face of the chamber; and   a supporting member located between the tank and the heat spreader; wherein the supporting member has a wave shape and supports the at least a wick layer.   
   
   
       12 . The heat sink of  claim 11 , wherein the supporting member is integrally made from a sheet, and defines a plurality of holes therein for the working fluid flowing therethrough. 
   
   
       13 . The heat sink of  claim 12 , wherein the supporting member divides the chamber into a plurality of cavities in communication with each other via the holes of the supporting member. 
   
   
       14 . The heat sink of  claim 13 , wherein the supporting member comprises a plurality of supporting portions contacting the at least a wick layer and a plurality of connecting portions interconnecting the supporting portions, the plurality of hoes in the supporting member being defined in the connecting portions. 
   
   
       15 . The heat sink of  claim 14 , wherein a region between each supporting portion and two adjacent connecting portions at two ends of the supporting portion has a trapezoid cross section. 
   
   
       16 . The heat sink of  claim 11 , wherein the number of the at least a wick layer is two, a first wick layer being formed on an inner face of the tank, a second wick layer being formed on an inner face of the heat spreader, the first wick layer being received in and in communication with the second wick layer.