Patent ID: 7556689

Claim:
A spreading device for spreading viscous thermal medium material to an inner wall surface of a channel defined through a cooling device for electronic component, comprising: an injector having the viscous thermal medium material and a piston therein; a pressure control for exerting a controlled pressure to the viscous thermal medium material through the piston; and a spreading tube extending from the injector and fludically communicating with the injector, having a plurality of holes therein and a recess, the viscous thermal medium material being able to flow out of the spreading tube through the holes, the holes being located near a free end of the spreading tube distant from the injector, the viscous thermal medium material filling the recess before being spread on the inner wall surface; wherein the holes are located in the recess; and wherein the spreading tube further comprises a protrusion thereon and the protrusion is located between the recess and the free end of the spreading tube.