Jim,
Thanks for your reply. In your observations, why are
there so many problems with this process. I am in the
investigating stages, so Im trying to minimize my
work.
From what I hear from others, even the ones who
support
this process, that it is buggy. Where are people going
wrong? Is it the customers fault for not following
procedures, is it the equiptment makers fault for not
making the equiptment right, or is it the chemical
suppliers fault for not informing all the parties
involved on what it takes to make this work.
I realize with any new process there are some hurdles
to encounter, but from what some of the people selling
this are saying, it is a process that has wide
acceptance. With this, I would assume some of the
growing pains would have been overcome. Is it better
in Europe or Asia? I believe this process orginated
outside the US, so is the problem with the licencees,
maybe not having all the info? I am a small shop, with
little enginering support. Any info on this process
yay or nay would be helpful.
Thanks for your reply
Richard
Jim Kenny <[log in to unmask]> wrote:
> There ar few if any true drop in processes out
> there. Even changing form
> one resist strip chemistry to another requires some
> degree of diligence to
> insure a good start up.
>
> The white tin process does require some work up
> front for a good
> installation. Getting the equipment desired/required
> by your vendor is part
> of it. Performing the required daily analysis and
> solderability tests is
> also part of it.
>
> I have worked with ENIG, OSP, HASL and white tin.
> Starting up anyone of
> these processes is not easy, you can't drop it in
> and walk away. I can say
> white tin is much easier to work with then ENIG. The
> temperatures are
> lower, bath loading is not as critical, and rework
> is possible if
> everything does not go correctly the first time.
>
> Jim Kenny
> Dexter
> 603-759-4713
>
>
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