Patent ID: 8809247

Claim:
A cleaning composition used for cleaning a substrate for an electronic device comprising: a water-soluble salt (A) comprising a transition metal, a chelating agent (B) and a peroxide (C), wherein an amount of said chelating agent (B) is 0.5 to 10 molar equivalents relative to an amount of said water-soluble salt (A) comprising a transition metal, and wherein said water-soluble salt (A) comprising a transition metal is copper sulfate pentahydrate, and said chelating agent (B) is selected from the group consisting of tetrasodium iminodisuccinate, tetrasodium hydroxyiminodisuccinate, trisodium methylglycinediacetate, tetrasodium L-glutamic acid diacetate, tetrasodium L-aspartic acid N,N-diacetate, trisodium citrate dihydrate, sodium tripolyphosphate, sodium hydroxyethane diphosphonate, maleic acid-acrylic acid copolymer, sodium salt of carboxymethylated polyethyleneimine, and trisodium nitrilotriacetate.