I'm interested in what the "Grand Wazoo" Doug Pauls and Brian Ellis have to say about this.  If I've read their musings correctly alcohol does a nice job of spreading the ionic schmootz where DI water cleans it very well.

If my research is correct, there are several automated DI water stencil cleaning systems readily available on the market (www.aqueoustech.com www.aat-corp.com to name just two) and these suppliers also make batch style board cleaners.  Austin American (aat-corp) has a new unit on the market for under $10k.

Oops, was that too close to a sales pitch?

Why would you want to "eliminate DI water"?

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Black, Paul
Sent: Wednesday, September 01, 2004 10:58 AM
To: [log in to unmask]
Subject: [TN] Cleaning populated boards with Isopropyl


Hi Everyone,

I currently clean SMT stencils in a sink with hot deionized water. I would like to automate this process (and eliminate the DI water) and have been looking at cleaners that can do the job. One of them uses Isopropyl Alcohol with no rinsing. This should work fine for the stencils but occasionally I also have to clean misprinted boards that may already be populated on one side, using no-clean solder paste. If I were to use this Isopropyl process on the misprints, would I be risking reliability of the board?

Any help would be appreciated.

Thank you, 
Paul Black 
Manufacturing Engineer 
Kronos 
E-mail: [log in to unmask] 
Voice: (978) 947-1520 


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