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Etching solution for Nickel on PET

I want to etch ~70 Angstroms thick Nickel coating that has been sputtered on Polyethylene. Suggestions are welcome!

Seema Agrawal
- Wilmington, Delaware, USA
2003

What exactly do you mean by 'etch', though? Roughen, reveal grain, remove the whole 70 Angstroms in selected areas? 70 Angstroms is thin enough that I would suspect the latter since you've given us little context to go on.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

A mixture of 20 vol hydrogen peroxide with 10% sulfuric acid will do it. However, 70 Angstrom thick nickel is a specialist product, so if you want to etch fancy patterns, try ablation with an excimer laser.

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
2003

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