Micro heat pipe and method of manufacturing micro heat pipe

A method of manufacturing a micro heat pipe, comprising the steps of:

• preparing a pipe body having two open ends;
• introducing etchant into the pipe body to etch an inner pipe wall of the pipe body to form etched patterns, which serve as a first capillary structure, on the inner pipe wall of the pipe body;
• sealing one of the two open ends of the pipe body by solderless welding, and defining a heat absorbing section, a heat isolating section and a condensing section in order along a body part of the pipe body from the sealed end to the remained open end;
• disposing a second capillary material through the remained open end in the heat absorbing section of the pipe body in a way that the second capillary material fills up the heat absorbing section;
• sintering the second capillary material with the pipe body to make the second capillary material form a second capillary structure;
• introducing a working fluid into the pipe body;
• pumping air out of the pipe body to create a vacuum therein, and sealing the remained open end by solderless welding.