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Wed, 5 Jun 2002 09:57:03 -0700 |
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Here is more background on MLCC
http://www.calce.umd.edu/whats_new/2001/design.pdf
Dave Fish
----- Original Message -----
From: "Ed Hare" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, June 03, 2002 8:21 AM
Subject: [TN] Extraneous Metal On MLCCs
> Fellow Technetters,
>
> I recently found extraneous metal on the surface of several MLCCs on an
> assembly. I examined stock parts and found this condition pre-existed on
> the stock caps (tape & reel). These caps have pure tin terminations.
There
> is a picture of this condition at the link below ...
>
> http://www.eskimo.com/~ehare/MetOnCap.bmp
>
> What is your opinion of the acceptability of this condition?
>
> What might be the root cause?
>
> Are there any specifications that address this issue?
>
> Best regards,
> Ed
> --
>
> SEM Lab, Inc.
> Scanning Electron Microscopy
> and Failure Analysis
> Snohomish, WA
> Ph. (425)335-4400
> Fax (603)658-4519
> http://www.semlab.com
>
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Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
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