Patent ID: 7396806

Claim:
A cleaning process of a semiconductor substrate or a semiconductor device comprising a step of: washing a semiconductor substrate or a semiconductor device with a detergent composition comprising a reducing agent, a chelating agent, and a dispersant selected from the group consisting of polyacrylic acid-sulfonic acid copolymer, naphthalenesulfonic acid-formalin condensate, and salts of organic base compounds thereof, wherein the detergent composition has an oxidation-reduction potential at 25° C. of +0.2 V or less, and a pH at 25° C. of from 3 to 12, and wherein the chelating agent is a phosphonic acid-based chelating agent, wherein the reducing agent is at least one compound selected from the group consisting of ammonium sulfite, ribose, glucose, saccharose and isoascorbic acid, and the semiconductor substrate or the semiconductor device has a line metal and the line metal is copper.