Everybody has problems cleaning under BGA's. We bought an air powered sprayer. We call it the car wash. The pickup hose just goes in the aqueous tank. Works better than the Water Pik that we had been using. Got ours fr McMaster Carr, about $100. Cat.# 5447K15. Pg. 1877 of my catalog. They have others but do not get the brass nozzle, it does not like saponifier! 
Charles caswell
The Big Kahuna

-----Original Message-----
From: Macko, Joe @ IEC [mailto:[log in to unmask]]
Sent: Saturday, April 26, 2003 12:57 PM
To: [log in to unmask]
Subject: [TN] cleaning under BGAs


Fellow Technets,

Periodically, BGAs are reflowed using our AIR-VAC hot air rework station.
RMA liquid flux is 1st flowed under the BGA prior to reflow and then clean
afterwards starting with IPA spray followed by an in-line cleaner wash.
Occasionally, flux residue remains which requires additional cleaning.

I am in need of a creative and operator safe way to either spray/flow warm
IPA or a mixture of hot saponifier/DI water (from our in-line cleaner) under
BGAs to expedite cleaning.  I do not know of any equipment on the market
that can be used for this application.

Welcome ALL suggestions and proven methods.  thanks

joe

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