Patent ID: 8976529
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A package structure comprising: a first package component; a stiffener ring over and bonded to a top surface of the first package component; a second package component over and bonded to the top surface of the first package component, wherein the second package component is encircled by the stiffener ring; a metal lid over and bonded to the stiffener ring, wherein the metal lid comprises a plurality of openings, wherein the metal lid has a top-view shape of a rectangle having a width and a length, wherein no Distance to Neutral Point (DNP) between any point of the metal lid and a center of the metal lid is greater than a half of the width and a half of the length, and wherein no DNP has a stress path passing through any of the plurality of openings in the metal lid; a heat sink over the metal lid, wherein the heat sink comprises an additional through-opening vertically overlapping one of the plurality of through-openings in the metal lid; and a thermal interface material between and joining the heat sink and the metal lid.