Technetters,

We recently had a Murata SMD crystal to cause a failure in the field.
This particular unit had been to Repair and the component was manually
replaced during the manufacturing process.

The vendor analysis reported the component saw excessive heat during the
rework and caused internal depolarization which led to failure.

We made 10 attempts to re-create this condition and were unsuccessful in
doing so.  We used dual soldering irons, had the temps cranked as far as
they would go, and gave them excessive exposure times.

Could the vendor analysis have been incorrect, or was their explanation
a real possibility?

Why were we not able to replicate this?

Thanks in advance,

Leland

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------