Patent ID: 6664617
Filing Date: 2003-12-16
Classification: H01L

Abstract:
A semiconductor package comprising:a metallic foil having a front surface and a rear surface, the foil being formed to have a recess portion including a bottom and an extended border region around the recess portion; a substrate attached to the front surface of the foil over the border region to provide a support for electrical connection of a semiconductor element, the substrate having an opening exposing the recess portion; a stiffener formed on the rear surface of the foil for enhancing the rigidity of the foil, the stiffener extending over the border region and around the recess portion; wherein the rear surface of the bottom of the recess portion is exposed for heat dissipation, and a semiconductor element is mounted on the bottom of and within the recess portion; and wherein the border region of the foil is formed with at least one aperture, and an additional semiconductor element is mounted on a rear surface of the substrate through the aperture and enclosed by the stiffener.