Patent ID: 8659169

Claim:
An integrated circuit (IC) comprising: a substrate; an integrated circuit chip that is flip-chip bonded to a first surface of the substrate having a first corner, a second corner, a third corner and a fourth corner; an underfill material on the first surface of the substrate; a contact array on a second surface of the substrate; a first corner structure attached to the integrated circuit chip covering at least the first corner, wherein the first corner structure is in direct contact with the substrate and has a first footing which transfers force applied to a top of the first corner structure to the substrate; and a second corner structure, which is not in direct contact with the first corner structure, attached to the integrated circuit chip covering at least the second corner so as to leave a central area of the integrated circuit chip uncovered by the first corner structure and the second corner structure, wherein the second corner structure is in direct contact with the substrate and has a second footing which transfers force applied to a top of second corner structure to the substrate; and wherein the first footing and the second footing are offset from a side edge of the IC chip so that the first footing and the second footing do not impinge the underfill material.