Patent ID: 6171967
Filing Date: 2001-01-09
Classification: H01L

Abstract:
A metal wire forming method for a semiconductor device comprising the steps of:(a) forming a first insulator film over a substrate having at least a second insulator film formed thereon and a first conductive layer formed on said second insulator film;(b1) forming a first photosensitive film of a first type on said first insulator film;(b2) forming a second photosensitive film of a second type on said first photosensitive film;(c1) exposing and developing said second photosensitive film according to a contact hole pattern to expose a portion of said first photosensitive film;(c2) etching said exposed portion of first photosensitive film to expose a portion of said first insulator film;(d) etching said exposed portion of said first insulator film using said first photosensitive film as a mask to form a contact hole in said first insulator film;(e) exposing and developing said first photosensitive film according to a trench pattern which includes said contact hole;(f) etching said first insulator film using said first photosensitive film as the mask so that a trench is formed in said first insulator film and said first conductive layer is exposed via said contact hole;(g) removing said first photosensitive film; and(h) filling said trench and said contact hole with a conductive material to form a second conductive layer electrically connected to said first conductive layer.