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July 2005

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Subject:
From:
"Crepeau, Phil (Space Technology)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Crepeau, Phil (Space Technology)
Date:
Wed, 6 Jul 2005 16:57:09 -0700
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hi,

the good old days weren't all that bad.  when i needed to have a
specification callout for a conformal coating on an engineering, i just
used mil-i-46058, type ur (for example), and the drawing checkers were
quite happy.  since mil-i-46058 has been cancelled with no replacement,
what to do?  i couldn't find an ipc equivalent to mil-i-46058 (that is
one that has a 'qpl' associated with it.  what do i put on my drawing
notes and parts list?

do conformal coating vendors qualify to ipc-cc-830b?

thanks,

phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gerry Savard
Sent: Monday, June 27, 2005 6:30 PM
To: [log in to unmask]
Subject: Re: [TN] No-clean residue requirements

IPC-A-610D, section 10.4.1, states as acceptable, Class 1,2,3 "No
discernible residue from cleanable fluxes is allowed" and "Flux residues
from no-clean processes may be allowed."  The 'may be allowed' part I
believe covers the bases for those products that have to be super clean
depending on its end-usage.  In general, no-clean will leave some
residue which is acceptable since it's activity is very low.

Gerry Savard



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jordan, Dave
Sent: Monday, June 27, 2005 8:46 PM
To: [log in to unmask]
Subject: [TN] No-clean residue requirements

I've got a customer claiming that the slight residue left on a board by
no-clean flux is a fault under either IPC-A-610 or J-STD-001. Perhaps
I'm missing it, but there doesn't seem to be any clear statement about
no-clean residue vs water wash in the standards. Any help out there?
Thanks in advance.

Dave
Production Operations
Nova Engineering

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