Patent ID: 7420810

Claim:
A heat sink comprising: a) a base heat spreader; b) at least one fin including: b1) a housing which encloses an inner area, b2) a liquid transfer medium within the inner area of the housing; b3) a working fluid within the inner area of the housing and at least partially contained in the liquid transfer medium; and b4) at least one support structure within the housing, for separating the liquid transfer medium into two portions; and c) a contact point between the base heat spreader and the at least one fin; wherein the heat spreader can transfer thermal energy into the housing of the at least one fin such that liquid working fluid in the liquid transfer medium is evaporated to vapor working fluid and mobilized to a relatively low temperature region of inner housing of the fin causing the vapor working fluid to condense back into liquid working fluid and flow to the liquid transfer medium.