Patent ID: 8671570

Claim:
A vapor chamber used in an electronic device, the electronic device including a metal casing, the vapor chamber comprising: an upper cover disposed on inner walls of the metal casing of the electronic device to define a containing space; a working fluid filled into the containing space; a waterproof layer formed on inner walls of the containing space; a wick structure layer formed on the waterproof layer; and an electrical-insulating heat-conducting ceramic layer formed between the waterproof layer and the inner walls of the containing space; wherein the electrical-insulating heat-conducting ceramic layer, the waterproof layer and the wick structure layer are sequentially formed on the inner walls of the metal casing via thermal spray molding to avoid reactions of the working fluid, the electrical-insulating heat-conducting ceramic layer, the waterproof layer, and the wick structure layer as well as to avoid an electrochemistry corrosion caused by standard potential differences of the electrical-insulating heat-conducting ceramic layer, the waterproof layer and the wick structure layer, wherein porosity of the electrical-insulating heat-conducting ceramic layer is less than or equal to 10%, porosity of the waterproof layer is less than or equal to 2%, and porosity of the wick structure layer is between 30% and 70%.