Method of filling and sealing working fluid within heat-dissipating device

Abstract

A method (100) of filling and sealing a predetermined quantity of working fluid within a hollow metal casing (11) of a heat-dissipating device such as a heat pipe (10) or a vapor chamber-based heat spreader includes the following steps: (1) filling a working fluid (16) into the hollow metal casing through an open end (12) thereof until the hollow metal casing is full of the working fluid; (2) pumping a portion of the working fluid out of the hollow metal casing until the predetermined quantity of working fluid is left in the hollow metal casing; and (3) sealing the open end of the hollow metal casing. By this method, a vacuum condition is accordingly formed inside the heat pipe due to removal of the portion of the working fluid from the heat pipe and the air contained in the heat pipe is effectively removed.

Dependencies are inferred from the claim text.