Patent ID: 7091820

Claim:
A microelectronic assembly comprising: a semiconductor chip having a front face including contacts and a back face remote therefrom; a mass of a dielectric material at least partially encapsulating said semiconductor chip so that said encapsulated semiconductor chip forms a body having exterior surfaces including a bottom surface; metallic conductive units secured to said mass of dielectric material, said conductive units defining a central region therebetween, said semiconductor chip being disposed in said central region, said conductive units having portions exposed at said bottom surface of the body, posts extending upwardly from said exposed portions into said body, and top flange portions integral with said posts recessed above said bottom surface, said top flange portion of each said unit projecting in a first horizontal direction from the post of such unit, said top flange portion of each said unit also projecting in a second horizontal direction from the post of such unit, said second horizontal direction being opposite to said first horizontal direction, at least some of said contacts being electrically connected to at least some of said conductive units; and a thermally conductive element exposed at said bottom surface of said body in said central region, said semiconductor chip overlying said thermally conductive element and being thermally connected to said thermally conductive element, the entire exposed portions of said units being substantially coplanar with said thermally conductive element.