Patent ID: 6026895
Filing Date: 2000-02-22
Classification: F28F,H01L

Abstract:
An apparatus for cooling a heat generating element, comprising:a plurality of cooling fins, each fin having a first end, a second end, and a film of a thermally conductive material disposed between said first and second ends and having an attachment region at said first end for attachment to the heat generating element or to an attachment region of another said cooling fin, said film of thermally conductive material further having a heat-exchanging region disposed between said attachment region and said second end for contact with a cooling fluid, each of said regions having a first surface and a second surface opposite to the first surface; andwherein each said cooling fin further comprises a film of a polymeric material attached to one of the surfaces of the heat-exchanging region of the film of thermally conductive material, said polymeric material having a thermal conductivity;wherein said thermally conductive material has a thermal conductivity which is greater than 50 W/m.multidot.K and which is greater than the thermal conductivity of said polymeric material;wherein the thickness of each said fin is less than 500 .mu.m; andwherein the attachment regions of at least two films of thermally conductive material are attached to one another at their surfaces by at least one of; a solder material, a welding material, a thermally conductive adhesive material, and a mechanical pressure which holds the surface of one attachment region against the surface of another attachment region.