Patent ID: 7718590

Claim:
A method for removing one or more of resist, etching residue, planarization residue, and copper oxide from a substrate comprising copper and a low-k dielectric material, said method comprising the steps of: A) providing a substrate having a surface comprising copper-containing conductor and a low-k dielectric material and one or more of resist, etching residue, planarization residue, and copper oxide disposed on the surface thereof; B) contacting the surface of the substrate with a composition comprising: a) from 0.01% by weight up to 0.12% by weight of a fluoride-providing component selected from HF, NH 4 F, or a mixture thereof; b) from 1.5% by weight up to 6.0% by weight of a water miscible organic solvent which is a glycol ether; c) from 0.75% by weight up to 1.25% by weight of an organic acid having from 1 to 3 carbon atoms; d) from 85% by weight up to 98% by weight water, and e) optionally from 0% by weight up to 0.15% by weight of a chelator wherein the pH of the composition is less than 3, for a time and at a temperature sufficient to remove the resist, residues, and/or copper oxide.