In a message dated 3/24/99 5:08:27 PM Pacific Standard Time,
[log in to unmask] writes:

> Kathy,
>
>  I can't speak much to the silver migration issue, but I whole-heartedly
>  concur with Steve's comments regarding manufacturability.  We've used these
>  parts extensively on boards we build for several customers, and have found
a
>  significant increase in shorts on the convex parts.
>
>  Rick Thompson
>  Ventura Electronics Assembly
>  2665A Park Center Dr.
>  Simi Valley, CA 93065

Hi Kathy,

In thinking about things, it was over three years ago that I worked at that
memory company that I spoke of...we could find out right here if there's a
silver migration issue with concave terminations...

Out of these 5 computer companies; Hewlett Packard, Dell, IBM, Compaq, or
Toshiba, how many of you as owners or operators, have had problems with their
cache memory? Not saying that we built memory for all of these companies,
...or three,....or two,...or? But we did at least one of them (just covering
my fanny here). But seriously, has anybody?....didn't think so...

These are the "big boys", and I'm sure that if there was a problem with the
silver migration issue, we would have heard something about it. I've got
documents from Phillips component engineers who did a study and recommended
using concave chip networks over convex ones...now why would they do that if
there was a problem?

I suspect that it's easier and cheaper to make them convex than concave (I'm
just guessing though), and the demand is rising for concave ones since
everybody is learning how much better they solder than the convex ones do...

What am I thinking? Salesmen don't do things like that, now do they?...'scuse
me for my outburst...

-Steve Gregory-

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