Patent ID: 6389691
Filing Date: 2002-05-21
Classification: H01L,Y10T

Abstract:
A method for forming a redistribution routing conductor on a microelectronic substrate including an electrical contact having an exposed portion, said method comprising the steps of:forming an under bump metallurgy layer on said microelectronic substrate electrically contacting said exposed portion of said electrical contact; forming a solder structure on said under bump metallurgy layer opposite said microelectronic substrate and adjacent said electrical contact, said solder structure including an elongate portion and an enlarged width portion, thereby defining first and second portions of said under bump metallurgy layer, said second portion of said under bump metallurgy layer including an elongate portion corresponding to said elongate portion of said solder structure and an enlarged width portion corresponding to said enlarged width portion of said solder structure, wherein the enlarged width portion of said solder structure is laterally displaced from said exposed portion of said electrical contact; and selectively removing said first portion of said under bump metallurgy layer.