Patent ID: 8618647

Claim:
A microelectronic unit, comprising: a semiconductor element having a top surface and a bottom surface remote from said top surface; a semiconductor device adjacent to said top surface; one or more first blind vias extending from said bottom surface and partially into a thickness of said semiconductor element; a thermally conductive material filling said one or more first blind vias for heat dissipation electrically conductive material placed in contact with said thermally conductive material, wherein said thermally conductive material is also electrically conductive, and wherein said electrically conductive material is configured such that adjacent portions of electrically conductive material are interconnected in a mesh structure; a second semiconductor element having a second top surface and a second bottom surface remote from said second top surface; a second semiconductor device adjacent to said top surface; one or more second blind vias extending from said second bottom surface and partially into a thickness of said second semiconductor element; second thermally conductive material filling each of said one or more second blind vias for heat dissipation; and second electrically conductive material connected to said second thermally conductive material, wherein said semiconductor device and said second semiconductor device are stacked in opposing orientation such that that said electrically conductive material and said second electrically conductive material are in contact with the mesh structure.