Vapor chamber

Abstract

A vapor chamber is provided which includes a container including a first region which is heated and a second region which dissipates a heat and having a plate shape, and a working fluid which is encapsulated inside the container. The working fluid is evaporated by a heat transferred to a first region, after a vapor which is an evaporated working fluid flows to the second region, the heat is dissipated and the vapor is condensed, and the working fluid which is the condensed vapor is circulated to the first region.

What is claimed is: 
     
         1 . A vapor chamber comprising:
 a container comprising a first region which is betted and a second region which dissipates a heat and having a plate shape; and   a working fluid which is encapsulated inside the container, wherein:   the working fluid is evaporated by a heat transferred to a first region, after a vapor which is an evaporated working fluid flows to the second region, the heat is dissipated and the vapor is condensed, and the working fluid which is the condensed vapor is circulated to the first region;   the container comprises a first plate member and a second plate member which configures a pair of plate members joined to each other with a predetermined interval;   in the first plate member, an elongated protruding portion which protrudes toward the second plate member and a recess portion which recesses with respect to the second plate member and is away from the second plate member are formed;   the elongated protruding portion and the recess portion is formed from the first region to the second region; and   a gap portion is formed between the elongated protruding portion and the second plate member, the gap portion is a liquid flow path where the working fluid is held and flows by a capillary force due to a generation of a meniscus by entering of the working fluid, and the recess portion is a vapor flow path where the vapor flows.   
     
     
         2 . The vapor chamber according to  claim 1 , wherein a plurality of the elongated protruding portions is provided radially from a first region where the working fluid is evaporated. 
     
     
         3 . The vapor chamber according to  claim 1 , wherein:
 the working fluid is water; and   a hydrophilicity of a distal end surface of the elongated protruding portion that faces the second plate member and a portion of the second plate member that faces the distal end surface, is higher than a hydrophilicity of an inner surface of the recess portion and a portion of the second plate member that faces the recess portion.   
     
     
         4 . The vapor chamber according to  claim 1 , wherein
 at least the first plate member in the pair of the plate members comprises a clad material comprising a copper and a stainless steel, a surface layer of the first plate member is the copper, and the copper is exposed to an inner side of the container.   
     
     
         5 . The vapor chamber according to any  claim 1 , wherein a projection which is in contact with the second plate member is formed at the first plate member, and the projection is joined on the the second plate member. 
     
     
         6 . The vapor chamber according to any  claim 1 , wherein:
 the first plate member is deformed in a concave-convex shape with the elongated protruding portion and the recess portion; and   in the second plate member, a first surface which is opposite to a surface facing the first plate member is a flat surface.