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Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 3 Jun 2002 09:30:03 -0700 |
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hi,
in my not so humble opinion, these parts should be scrapped. looks like a disaster waiting to happen. you should ask the manufacturer of these parts what caused this condition and ask them why they didn't reject them.
phil
-----Original Message-----
From: Ed Hare [mailto:[log in to unmask]]
Sent: Monday, June 03, 2002 8:22 AM
To: [log in to unmask]
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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