Patent ID: 6250541
Filing Date: 2001-06-26
Classification: H01L,H05K,Y10T

Abstract:
A method of forming a metallized via bond pad on an integrated circuit for flip chip interconnection, comprising the steps of:applying a primary metallization layer on the integrated circuit, said primary metallization layer is a metal consisting of aluminum-silicon-copper, said primary metallization layer has a thickness of 10-20 KA.degree.;applying a tungsten-titanium diffusion barrier layer on said primary metallization layer, said diffusion barrier layer having a thickness in the range of 8-12 KA.degree.;applying a sputtered copper oxidation protection layer on said diffusion barrier layer, said oxidation protection layer having a thickness of approximately 10 KA.degree.; andapplying a main metallization layer on said oxidation protection layer on which a flip chip bump is formed.