Patent ID: 7967062
Filing Date: 2011-06-28
Classification: H01L,Y10T

Abstract:
1. A thermally conductive composite interface coupling a cooling assembly to at least one heat-generating electronic device, the thermally conductive composite interface comprising: a plurality of discrete, thermally conductive pin fins disposed separate from one another and comprising a first material having a first thermal conductivity; a thermal interface material at least partially surrounding the plurality of discrete, thermally conductive pin fins and thermally interfacing the cooling assembly to a surface to be cooled of at least one heat-generating electronic device, the thermally conductive composite interface being disposed between the cooling assembly and the surface to be cooled, and comprising a second material having a second thermal conductivity, wherein the first thermal conductivity of the first material is greater than the second thermal conductivity of the second material; and wherein the thermally conductive composite interface physically and thermally couples the cooling assembly and the surface to be cooled, and at least some discrete, thermally conductive pin fins of the plurality of discrete, thermally conductive pin fins are each separately wire-bonded at only one end to at least one of a surface of the cooling assembly or the surface to be cooled over at least one first region of higher heat flux of the surface to be cooled and unattached at the other end, and extend towards and partially over at least one second region of lower heat flux of the surface to be cooled, the at least one first region and the at least one second region comprising different regions of the surface to be cooled of the at least one heat-generating electronic device, each separate wire bond being a metallurgical diffusion bond of the discrete, thermally conductive pin fin at only one end thereof to the at least one of the surface of the cooling assembly or the surface to be cooled, and wherein the at least some discrete, thermally conductive pin fins are disposed to conduct and locally spread heat, thereby facilitating heat transfer from the surface to be cooled of the at least one heat-generating electronic device to the cooling assembly.