Patent ID: 6940721

Claim:
A multi-layer interface structure disposed between a microelectronic component package and a heat sink so as to provide a total thermal resistance of no greater than about 0.03° C.-in 2 /W comprising a plurality of metallic layers superimposed upon one another including at least; a first layer forming the core of the structure composed of a high thermally conductive solid metal, a thin second layer having a thickness no greater than 2 mils overlying at least one side of the core layer to form a protective coating with the second layer composed of a material selected from the group consisting of nickle or platinum or alloys thereof and a third low melting metallic material layer of a composition having phase change properties with the third layer forming a coating over the first and the second layer whereby a low thermal resistance is established at the interface junction between the microelectronic component package and the heat sink.