Patent ID: 8012883

Claim:
A method of etching a metal layer comprising: providing a substrate having a metal layer disposed thereon; disposing an etching resist on the metal layer; patterning the etching resist to expose areas of metal; contacting the exposed areas of metal with a wet etching composition to remove a portion of the exposed metal; and contacting the substrate with a stripping composition to remove the etching resist and the remaining exposed metal; wherein the substrate is an optically transparent substrate and wherein the stripping composition comprises 5 to 65 wt % of a polyhydric alcohol, 5 to 55 wt % water, 5 to 65 wt % of a water-miscible amine and 5 to 50 wt % of a polar solvent, wherein the water-miscible amine is chosen from alkyleneamines and aminoalcohols, and wherein the polar solvent is chosen from polar aprotic solvents, dimethylformamide, dimethylacetamide, γ-butyrolactone and glycol ethers.