[labnetwork] KOH Baths

[Aebersold,Julia W.]

We maintain a 45% KOH bath along with a 5:1 TMAH (25% in H20):IPA bath.  Due to increased usage of late we have started to monitor the pH of the baths to determine if etch rates and selectivity are maintained our users.  However, we do have a reflux condenser that allows clients to set up their own concentrations if they desire.  I do not prefer this practice due to expense, especially with TMAH at $650 per case.

BTW, I have a question for Bill or anyone on Lab Network (sorry to hijack your thread Bill).  Can anyone recommend good technical support for K&S wirebonders that is 3rd party?  It would be nice if we could bring someone one in to review our tools that doesn't charge us like we're Intel.

Cheers!

Julia Aebersold, Ph.D. 
MNTC Cleanroom Manager
Shumaker Research Building, Room 233
2210 South Brook Street
University of Louisville
Louisville, KY  40292

502-852-1572
http://louisville.edu/micronano/

-----Original Message-----
From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Bill Flounders
Sent: Friday, December 13, 2013 1:07 PM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] KOH Baths

Lab Network,
Do any members maintain a standing KOH (30% or other) etch bath; or do you primarily support individual preparation and use?
Thank you for a brief description of your policy or strategy here.
Sincerely,
Bill Flounders
UC Berkeley

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