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 > > -------------------------------------------------------------------------- ------- > 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 > -------------------------------------------------------------------------- ------- > --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------