George,
Well said!!!
David A. Douthit
Manager
LoCan LLC
Wenger, George M. wrote:
>Paul,
>
>You're not going to find any information on statistical occurrences of
>Black-Pad events. Those that have had them don't want to talk about
>them. It's almost impossible to quantify how prevalent the problem is.
>Certainly if your board fabricator does a poor job of controlling ENIG
>you'll see more occurrences. I know of three occurrences of Black-Pad in
>my former company (Lucent) over a five year period and one occurrence in
>my current company (Andrew) in the past three years. If I were to take
>the number of occurrences and divide by the number of boards the
>prevalence would be well down in the noise. However, when your customer
>finds out that his customer's communications or internet system when
>down because a component fell off your board, your customer gets
>emotional and that one event is too much. If you haven't experienced
>that one event yet it's hard to believe that immersion silver is a
>better way to go. I'm biased. Eight years ago I believed that
>immersion silver was a better way to go to insure reliability and
>product quality and our experience has substantiated that belief. There
>are two kinds of immersion silver users that I know of. One kind has
>done their homework and decided that immersion silver works and the
>other kind of immersion silver user is they type that just can't stand
>another Black-Pad event.
>
>Regards,
>George
>George M. Wenger Andrew Corporation
>40 Technology Drive, Warren, NJ 07059
>(908) 546-4531 [log in to unmask]
>
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Truit
>Sent: Saturday, March 27, 2004 10:03 AM
>To: [log in to unmask]
>Subject: [TN] Black Pad Prevalence
>
>I have searched the archives and have found lot's of good info but
>nothing in regard to the prevalence or the statistical occurrences of
>this event.
>
>I have run tens of thousands of ENIG boards and I haven't observed this
>defect but I am concerned enough to ask. Is this a board fabricator
>controllable issue that has been minimized?
>
>Have you observed this phenomenon? How often will this occur? Is
>immersion silver the better way to go to assure the reliability and
>quality of the products?
>--
>Paul Truit, Mfg. Eng.
>RBB Systems, Inc.
>4265C E. Lincolnway
>Wooster, OH 44691
>Ph. (330) 567-2906 ext 514
>Fax (330) 263-5324
>Email: [log in to unmask]
>
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