Patent ID: 6097094
Filing Date: 2000-08-01
Classification: H01L

Abstract:
A semiconductor device, comprising:(A) a lower wiring layer including a first layer containing aluminum therein and a second layer formed on said first layer, said first layer having a narrower width than said second layer such that said second layer has an extended portion extending beyond an outer surface of said first layer in a width dimension;(B) an interlayer insulating layer positioned adjacent to and over said lower wiring layer, said interlayer insulating layer having a hole with a first portion extending from a top surface of said interlayer insulating layer to an upper surface of said second layer and a second portion extending from said top surface of said interlayer insulating layer beyond said second layer but not reaching a bottom of said first layer, a portion of said interlayer insulating layer abutting against said outer surface of said first layer of said lower wiring layer and being positioned under said extended portion of said second layer which extends beyond said outer surface of said first layer in said width dimension;(C) an electrically conductive material filling said hole, said portion of said interlayer insulating layer abutting against said outer surface of said first layer of said lower wiring layer preventing contact between said electrically conductive material and said first layer of said lower wiring layer; and(D) an upper wiring layer formed on said interlayer insulating film in electrical connection with said lower wiring layer through said electrically conductive material.