At 03:33 PM 6/16/00 -0400, Steve Gregory wrote:

>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?

Because the military types don't accept the idea that anyone will "always assure" cleanliness, as there are doubts even for a board which passes SEC tests.

The RMA fluxes have such chemistry that they are inert at normal operational temps.


cheers,

Jerry Cupples
Interphase Corporation
Dallas, TX USA

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