I am using duct tape/scotch tape to strip Cu thin films from SiO2 wafers. But I am unable to get rid of the tape later. I have tried certain chemicals like acetone, IPA, Ethanol. N- methyl Pyrrolidine etc. But they don't seem to have an effect on the tape. Is there any other chemical that selectively etches away the tape leaving the Cu film intact.
Acetone and IPA certainly should have dissolved the adhesive of the duct tape. You will probably need to submerge your sample in the solvent. The solvent may work in from the side of the tape to the center, but all of the adhesive should be dissolved. The structural part of the duct tape might be somewhat difficult to dissolve.
Plunge the sample in the mixture of Acetone and IPA in the ultrasonic bath with low power (around 35 W). Usually, it works!
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