The ability to remove organic flux residues from under the small
gaps beneath most SMDs is the main concern. Otherwise, organic fluxes have
been extensively used in soldering conventional assemblies with good
results.

        Harold Papazian.


        -----Original Message-----
        From:   Stephen R. Gregory [SMTP:[log in to unmask]]
        Sent:   Friday, June 16, 2000 2:34 PM
        To:     [log in to unmask]
        Subject:        [TN] Generic question about Flux types...

        Hi ya'll!!

        I gotta generic question about flux types. We do quite a few boards
here that
        still call out that the assembly is to be built to MIL-STD-2000
specs, and as
        has always been here, RMA flux is always used. My question is, what
is the
        REAL reason to use an RMA?

        I've been under the impression that because a RMA is not as active
as an OA,
        any residues that might be left behind from the RMA wouldn't be as
harmfull
        as OA residues would be. But if you always ensure that you clean
your boards
        thoroughly, what difference does it make whether you use an RMA or
an OA?

        -Steve Gregory-

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