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May 2001

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Subject:
From:
"Marsico, James" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 2 May 2001 08:45:00 -0400
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Hi, Phil,
The question is "is the no-clean flux used in the solder wick water
soluble?"   I don't recall seeing any that is, although I haven't been
looking for quite a while.  We use a "no-flux" solder wick for our OA
fluxing processes without problems.  The operators dab a little of the
liquid OA flux on the wick before using it.  It seems to work OK here.
Jim Marsico
Senior Engineer
Production Engineering
AIL/Electronics Systems Group
An EDO Company
[log in to unmask] <mailto:[log in to unmask]>

        -----Original Message-----
        From:   Phil Nutting [SMTP:[log in to unmask]]
        Sent:   Wednesday, May 02, 2001 8:33 AM
        To:     [log in to unmask]
        Subject:        [TN] solder wick, no-clean vs. no-flux

        About 3 months ago we converted our manufacturing system from RA
flux to OA
        flux.  Along with the conversion we switched from a solvent board
wash to an
        aqueous board wash using closed loop DI water only.  Now I have
people
        complaining that the solder wick (un fluxed) I switched to doesn't
work well
        at all.  I have suggested that they need to use some of the liquid
OA flux
        that they have been supplied, but still people are unhappy.  A few
        assemblers had used a no-clean flux solder wick with a previous
employer,
        which seemed to work well.  My question is are there
wash/compatibility
        problems with this no-clean flux wick, my DI water wash system and
residue
        left on the boards after wash?

        Phil Nutting
        Manufacturing Engineer
        Kaiser Systems, Inc.
        978-922-9300


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