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Al Etchant

I have been trying to find an etchant solution for Al that does not affect Co or NiFe. Can anyone help, please ? Previously I tried NaoH or KOH.

Khaled Husain
National University of Singapore - singapore

Try Phosphoric Acid at about 30%/vol and 120 degrees F.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

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