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Acid or Solvent that etches copper but not gallium arsenide

December 15, 2009

Greetings,

We are trying to find an acid or solvent that will remove copper, but will leave gallium arsenide intact.

Does anyone know of a substance that will do this?

Thanks in advance.

Kelly Kane
Solar Cell Technician - Niles, IL, USA

I have no experience with gallium arsenide, but I know that persulphate is a decent copper remover. citric acid will too, but very slowly only.

Ray Kremer
Stellar Solutions, Inc.

McHenry, Illinois

December 30, 2009

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