Patent ID: 7811978

Claim:
A method of cleaning a substrate comprising the steps of: (a) providing a composition composition comprising: (1) at least 10 parts per million of at least one surfactant of the formula: wherein: R f is a C 2 to C 6 perfluoroalkyl group; R is a C 2 to C 25 alkyl, hydroxyalkyl, alkylamine oxide, or aminoalkyl group which is optionally interrupted by a catenary oxygen, nitrogen, or sulfur atom; R 1 is an alkylene group of the formula —C n —H 2n (CHOH) o C m H 2m —, wherein n and m are independently 1 to 6, and o is 0 or 1, and where the alkylene is optionally interrupted by a catenary oxygen, nitrogen or sulfur atom; X − is SO 3 − or —CO 2 − ; and M + is a cation; and (2) solvent; and (3) oxidizing agent; (b) providing a substrate; (c) bringing a surface of the substrate and the composition into contact with each other to form an interface; and (d) allowing removal of unwanted surface material.