Patent ID: 8435888
Filing Date: 2013-05-07
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising the steps of: forming a barrier metal laminate on a semiconductor substrate, the barrier metal laminate comprising titanium films and a titanium nitride film between the titanium films; forming an aluminum film or an aluminum alloy film on an uppermost one of the titanium films in the barrier metal laminate; etching the aluminum film or the aluminum alloy film by wet etching using a mixed acid for patterning the aluminum film or the aluminum alloy film with a predetermined wiring pattern; etching a residue remaining on an exposed surface portion of the barrier metal laminate by plasma etching using a mixed gas comprising a fluorine-containing gas for removing the residue; etching the barrier metal laminate by plasma etching using a mixed gas comprising a chlorine-containing gas for patterning the barrier metal laminate with the predetermined wiring pattern; and coating an organic passivation film.