Patent ID: 6396156
Filing Date: 2002-05-28
Classification: H01L

Abstract:
A flip-chip bonding structure for bonding a flip chip to a substrate, which comprises:(a) a chip-side bond pad formed over the flip chip; (b) a first electrically-conductive stress-buffering layer laid over the chip-side bond pad; (c) a UBM layer laid over the first electrically-conductive stress-buffering layer; (d) a solder bump adhered to the UBM layer; (e) a substrate-side bond pad formed over the substrate; (f) a second electrically-conductive stress-buffering layer laid over the substrate-side bond pad; and (g) a solder-wettable metallization structure laid over the second electrically-conductive stress-buffering layer, and on which the solder bump is adhered.