As for Bob says, make sure about Moisture Sentivity Level of this LEDs and follow the right handling procedures. Failures like those have bine stronlgly reduced by following a rigid MSD Handling procedure (as for J-STD-0033) Mainly if LED have to be reflowed by Lead Free temperature. Also other important point is the ESD sensitivity of LEDs. In a few cases it was necessary to adop Ionizers at packaging and shipping station/desk. Best Regards G. Sala --------------------------------------------------- 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 -----------------------------------------------------