In a message dated 08/24/98 7:16:37 PM Pacific Daylight Time, [log in to unmask]
writes:

> Will there be any problem if my board surface finish is OSP and has a
>  press-fit connector?
>
>  Re,
>  Ken Patel

Hi Ken!

None that I'm aware of...but I guess it really depends where your board is
going to be living the rest of it's life...I suppose there isn't really any
more of a risk for problems than there is with a plated barrel. Although it IS
pretty important that your finished holes are a good fit with the press fit
pins, cause you don't have that "fudge factor" of the plating anymore.

At a past employer, we built quite a few different assemblies for a major
networking company here (hint: they're by great america), that used quite a
few high density right angle press-fits because these boards plugged into
backplanes.  After a faux pax or two,...or three,...okay then, four...we got
pretty good at it...(learning curve...you know how it is). One thing
important, a good stable fixture, as well as a precisely drilled support plate
accurately supporting the laminate close to the barrels will keep them from
getting pushed out of the board. I don't know how you're doing this, manually
with an arbor press, or with some sort of automated press, we just used a
manual arbor press. Interestingly enough, we found out that we had less barrel
damage when we had our ladies doing it rather than the guys...more delicate
touch I suppose?

-Steve Gregory-

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