I've used the BDT and have been generally happy with it, up to thicknesses
of about 2.5 microns.  Use the make-up solution to start with.  Take the
time to read the data sheets about maintaining the solution, otherwise
you'll end up with rough looking plating after a while.

We also found that you can substantially back off of the suggested current
(by a factor of 2 to 10) and get smooth results.

It's nice in that it's non-cyanide based, and it doesn't attack photoresist.

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

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Chih-Chieh Cheng
Sent: Thursday, January 19, 2006 7:13 PM
To: [email protected]
Subject: [mems-talk] Gold electroplating solutions


Hi, everyone

Does anyone ever use BDT gold solutions for gold electroplating? How is it?
There are several types such as make-up, replenisher and simple gold
solutions, which one should I use?