It's all LEDs these days!

We have an FA that shows poor wire bonds to GaAlAs/GaAs in microsection after assembly.  The failure is seen in the parts per hundred across different lots and slightly different part numbers of LEDs.
The assumption would be that LED wiring bonding defects are very rare.   Is there something particular about these?  Or is it the crimping and/or Pb-free assembly that is pulling them apart?
The ones that seem more susceptible are GaAlAs  Double Heteros.

Thanks.

Chris


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
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
-----------------------------------------------------