Patent ID: 8729166

Claim:
A polymer composition comprising: a sacrificial polymer comprising a polycarbonate having a molecular weight (Mw) from 5,000 to 200,000; a carrier solvent; formic acid; and a thermal acid generator/fluxing agent (TAG/FLAG) selected from: di(4-tert-butylphenyl)iodonium trifluorophenylborate, dimethylanilinium tetrakis(pentafluorophenyl)borate, pyridinium trifluoromethanesulfonate, 4-isopropyl-4′-methyldiphenyliodonium tetrakis(pentafluorophenyl)borate, di(4-tert-butylphenyl)iodonium trifluoromethanesulfonate, (2-(4-methoxynaphthalen-1-yl)-2-oxoethyl)dimethylsulfonium tetrakis(pentafluorophenyl)borate, p-methoxybenzyldimethylanilinium trifluoromethanesulfonate, or mixtures thereof.