Hi Phil - you might give this recipe a try: 1-5 grams of CrO3 in 100ml of
HCl. Either swab or immerse for a few seconds. Good Luck.
Dave Hillman
Rockwell Collins
[log in to unmask][log in to unmask] on 11/26/97 08:27:50 AM
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cc: (bcc: David D Hillman/CedarRapids/Collins/Rockwell)
Subject: [TN] Etchant for Au/Sn solder
Hi,
Does anyone know of good etchant for gold tin solder (80Au/20Sn) joints
that
are viewed in microsection for metallurgical structure and cracks. Agua
regia does not seem to give the best results.
Thanks,
Phil Hinton
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