Right you are.  A commercial form is Transene TFA:
http://www.transene.com/etch_process.html


David Nemeth
Senior Engineer
Sophia Wireless, Inc.
14225-C Sullyfield Circle
Chantilly, VA 20151


-----Original Message-----
From: mems-talk-bounces@memsnet.org
[mailto:mems-talk-bounces@memsnet.org]On Behalf Of Dean Hopkins
Sent: Monday, July 25, 2005 1:09 PM
To: mems-talk@memsnet.org
Subject: [mems-talk] Re: Gold etching (Nik Dee)/ David Nemeth

"Theres is an Iodidee/Ammoniumum Idodide etch"

Ummm NO!!!! Ammonium Iodide is a very sensitive
explosive!!!!

Should be: Iodine/POPOTASSIUM Iodide etch.