Patent ID: 7814655
Filing Date: 2010-10-19
Classification: F28D,H01L,Y10T

Abstract:
1. A process for manufacturing a heat pipe, the heat pipe comprising: a heat pipe body with at least one interior space in the heat pipe body, the interior space being closed toward the outside by walls, at least one vapor channel and at least one fluid channel connected to the at least one vapor channel and having a porous or capillary structure in the interior space, the porous or capillary structure comprising particles of ceramic materials connected with each other and with an inner surface of the interior space of the heat pipe body such that the capillary or porous flow paths are formed between the particles and several spatially separated posts extending through the interior space and between two opposing walls delimiting the interior space, the posts and the walls being made of metal with high heat conductivity, and wherein the process comprising: connecting each post at both ends directly with one of the two opposing walls by means of DCB-bonding and, connecting the particles of ceramic with the interior space of the heat pipe body by DCB-bonding upon heating to a bond temperature between 1065 and 1085° C. and through shaking so that a melting of a copper/copper oxide eutectic causes a formation of copper stays connecting the particles of ceramic material with each other and with a surface of the interior space of the heat pipe body to produce the capillary structure.