Patent ID: 6998180
Filing Date: 2006-02-14
Classification: B32B,C04B,H01L,Y10T

Abstract:
1. A composite component package, comprising: a substrate having a base surface and a joining surface opposite said base surface; at least one semiconductor component joined to said joining surface of said substrate; and an enclosure joined to said substrate; wherein said substrate is a three-layer composite having a first layer facing said enclosure and consisting of Cu or a Cu alloy, a second layer consisting of Mo—Cu, and a third layer consisting of Cu or a Cu alloy, and wherein a thickness s said substrate having a thermal conductivity, transversely to said joining surface, of greater than 170 W/mK; and said substrate having an asymmetrical thermal expansion with a coefficient of thermal expansion of said joining surface differing from a coefficient of thermal expansion of said base surface by at least 2%.