Patent ID: 6262489
Filing Date: 2001-07-17
Classification: H01L

Abstract:
A flip chip assembly on a substrate having first and second conductor patterns, the flip chip assembly comprising:a flip chip mounted to the substrate, the flip chip having a first surface, an oppositely-disposed second surface, an integrated circuit on the first surface, and an electrical contact on the second surface;first solder connections electrically and mechanically connecting the flip chip to the first conductor pattern on the substrate;an electrical contact member positioned so that the flip chip is between the electrical contact member and the substrate, the electrical contact member comprising a first portion connected to the flip chip and a second portion connected to the substrate, the first portion having a lower coefficient of thermal expansion than the second portion;second solder connections electrically and mechanically connecting the second portion of the electrical contact member to the second conductor pattern on the substrate; andan electrically-conductive connection electrically and mechanically connecting the first portion of the electrical contact member to the electrical contact on the second surface of the flip chip.