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April 2008

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Subject:
From:
Bev Christian <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Bev Christian <[log in to unmask]>
Date:
Wed, 30 Apr 2008 13:37:24 -0400
Content-Type:
text/plain
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text/plain (76 lines)
Chris,
Sounds like a large can of snakes.

This would be $ and a lot of work, but you might want to consider
building B52 boards, doing your rework, carry out any normal post rework
cleaning and then running the testing you talked about.

Bev
RIM


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Chris Schaefer
Sent: Wednesday, April 30, 2008 12:58 PM
To: [log in to unmask]
Subject: [TN] Hand Cleaning Chemistry Qualification

TechTeam,

We are in the very beginning stages of starting a conversion from one
hand 
cleaning solvent to another more effective one. I am curious what makes
the 
most sense in terms of methods to use to qualify as well as what is the
likely 
norm from the industry? We are required to perform SIR or ECM, and IC
testing 
by various customers prior to any changes which I think is a good thing,
but 
what would be the application process of flux, soldering, and finally
cleaning? 
As well as the actual soldering and cleaning process. With the various 
geometries, spacing, ground planes, thermal requirements, materials,
time, 
etc... How would best capture the effectiveness of the new solvent? We
are 
currently using an RMA 15% solid flux, hand soldering with 600-700dgree
tips 
on multi-layer product from FR4 to teflon. I hope I didn't open a huge
can-o-
worms.

Thanks all and have a great day!

Chris

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