Patent ID: 7059512
Filing Date: 2006-06-13
Classification: B23K,H01B,H01L,Y10T

Abstract:
1. A process for forming a bump comprising the steps of: forming an intermediate, metallic layer; forming a solder alloy material layer on the intermediate, metallic layer; forming a flux material layer on the solder alloy material layer; and heating and fusing the solder alloy material layer and the flux material layer, wherein the bump is formed on an external electrode pad of a semiconductor device, and wherein the process includes at least one step of: forming the electroconductive, adhesive layer as the intermediate, metallic layer by liquid-spraying an electroconductive, adhesive composition on the external electrode pad of the semiconductor device, the electroconductive, adhesive composition containing at least: forming the solder alloy material layer by liquid-spraying a solder alloy material layer composition on the intermediate, metallic layer, the solder alloy material layer composition containing at least: forming the flux material layer by liquid-spraying a flux material layer composition on the solder alloy material layer, the flux material layer composition containing at least: