Patent ID: 6651325
Filing Date: 2003-11-25
Classification: B81B,G01R,Y10T

Abstract:
A method for forming a cantilever beam probe card on a semiconducting substrate comprising the steps of:providing a semiconducting substrate having a top surface and a bottom surface; depositing an insulating material layer of at least 0.1 &mgr;m thickness on said top surface; patterning and etching at least two via holes in said insulating material layer; depositing a first metal layer of at least 0.15 &mgr;m thickness on top of and measured from said semiconducting substrate filling said at least two via holes and covering a top surface of said insulating material layer; depositing a second metal layer of at least 0.1 &mgr;m thickness on top of said first metal layer, said second metal layer being formed of a metal different than said first metal layer; patterning and etching at least two via holes in said bottom surface of said semiconducting substrate exposing said at least two via holes formed in said insulating material layer; filling said at least two via holes in said semiconducting substrate with a metal forming at least two vias; patterning and etching at least two cone-shaped microprobes from said second metal layer; patterning and etching a trench in said first metal layer electrically insulating said at least two cone-shaped microprobes from each other; and etching away said insulating material layer from said top surface of said semiconducting substrate.