Patent ID: 8067833

Claim:
A microelectronic assembly comprising: a semiconductor die having one or more integrated circuits formed thereon; a package substrate for mechanically supporting the semiconductor die; a stiffening member comprising a continuous side wall forming an outer perimeter and an inner perimeter with the inner perimeter enclosing a hollow cavity surrounding the semiconductor die, and wherein the continuous side wall includes a side wall bottom surface fixedly attached to the package substrate and a side wall top surface separated from the bottom surface by a side wall thickness that exceeds a height of the semiconductor die; a cover fixedly attached to the side wall top surface for sealing the hollow cavity; and, a passive electrical component housed inside the hollow cavity and disposed on the package substrate and electrically interconnected to the semiconductor; and further comprises a heat spreader comprising a spreader bottom surface in thermal contact with the semiconductor die and a spreader top surface in thermal contact with the cover.