Patent ID: 7301227
Filing Date: 2007-11-27
Classification: H01L

Abstract:
1. A package for an integrated circuit (IC) die, the package comprising: a substrate, the substrate having an upper surface facing an interior of the package and a lower surface facing an exterior of the package, the upper surface carrying an IC die, the substrate providing electrical connections from the IC die to the lower surface of the substrate on the exterior of the package; a lid, the lid comprising an outer lid and an inner lid, the inner lid being positioned over the IC die and in thermal communication with the IC die, the inner lid being formed of a material suitable for conducting heat away from the IC die, the outer lid being attached to the upper surface of the substrate; and wherein a gap extends between the outer lid and the inner lid, the inner lid and the outer lid being constructed and assembled so that the gap permits the inner lid to move with respect to the outer lid and accommodate differences in thermal expansion between the inner lid and the outer lid.