Patent ID: 7910402
Filing Date: 2011-03-22
Classification: H01L,H05K,Y02P

Abstract:
1. A method of fabricating a semiconductor device, comprising the steps of: providing a combination of a semiconductor chip including first electrode pads, and bump electrodes formed on the first electrode pads, and a substrate including second electrode pads, and precoats formed on the second electrode pads, having the first electrode pads and the second electrode pads positioned to each other; and interconnecting the first electrode pads of the semiconductor chip and the second electrode pads of the substrate, with the bump electrodes in between, by heating and melting the bump electrodes, wherein the bump electrodes and the precoats comprise alloys of tin and copper, the interconnecting comprises heating the bump electrodes by a temperature profile having after a heating up to a melting point of the bump electrodes or more a cooling comprising keeping a temperature within a range of 190 to 210° C. for an interval of time within a range of 3 to 15 minutes, and a condition is met, such that 1.4<L