You should be fine.  If there are any pin holes in the gold then the HF will
find a way to the substrate but if your coating is uniform you should have no
problems.

Tres

-----Original Message-----
From: li Yu [mailto:yuli_st1234@yahoo.com]
Sent: Sunday, February 15, 2004 9:14 PM
To: mems-talk@memsnet.org
Subject: [mems-talk] Does concentrated HF etch Au


I want to put a wafer with 2000A Au in 49% HF for 30 minute, Is that Ok? Thanks
in advance.
 Lili


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