Fractured Solder Joints My company has been doing hand assembly/soldering on a driver IC board for a display that is used on a military airplane. The board uses 8 Holt ICs - HI-8010SM-32 - http://www.holtic.com/ProPDFs/8010.C.pdf The boards we provide have been in use for between 1 year and 8 years, the actual time is unknown, but it is likely that they have been in place for a long period of time. The IC is a 44 pin QFP J-lead with 0.050 center spacing on the leads. Our customer has recently found fractured solder joints associated with these ICs (identical to those in photo - IPC-A-610C page 12-85 ) It is assumed that the fractured solder joints occured after leaving our facilities, caused by airplace stress cycles or ??? I am looking for any information on why these fractures would occur, the boards are spring mounted on the plane, the boards measure about 1.5" x 5". Most importantly, I am looking for a solution to this problem, I am currently looking for a more ductile solder...the solder used in the past was Kester SN60PB40. I can also change the assembly process if that is determined to be the root cause (all hand soldered) thanks for any information you can provide. Patti Volkman (1-800-823-5588) _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.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 ---------------------------------------------------------------------------------