Patent ID: 6174819
Filing Date: 2001-01-16
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device having metal interconnections on an upper surface, which method comprises:sputter depositing a titanium layer having a thickness of about 250 .ANG. on the upper surface;sputter depositing a layer of an aluminum alloy containing about 1% copper having a thickness of about 4000 .ANG. to about 8000 .ANG. on the titanium layer;sputter depositing a titanium nitride layer having a thickness of about 500.ANG. or about 1100 .ANG. on the aluminum alloy layer;forming a first photoresist mask having a pattern and having a thickness of about 1.0 .mu.m to about 1.4 .mu.m on the titanium nitride layer;detecting a defect in the first photoresist mask;removing a portion of the first photoresist mask by oxygen plasma stripping at a temperature of about 150.degree. C. or less leaving a remaining portion;substantially removing the remaining portion of the first photoresist mask by applying a solvent thereto at a temperature of about 70.degree. C. to about 80.degree. C.;forming a second photoresist mask having the pattern at a thickness of about 1.2 .mu.m on the titanium nitride layer; andetching the titanium nitride, aluminum and titanium layers to form metal interconnections.