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Is it possible to etch indium w/o etching aluminum?

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application = 10-20um indium bumps on aluminum IC pads.
problem = reworking indium bumps.

Questions: Is it possible to etch indium w/o etching aluminum? or Is it possible to repair IC pads if damaged (not necessarily with the same metal)?

Stephen Gabelich
electonics - El Segundo, California, USA

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