Gil Are you sure it melted the copper? Given that copper melts at a whopping 1084DegC I suspect you might have some moisture that into the works? Kindest regards, Graham [log in to unmask] On 4 Sep 2007, at 18:25, Zilber Gil wrote: > Hi, > > Recently one of our motherboard failed. It reaches very high > temperature > that melts the copper and explodes shooting (from the side of the > board) > the melt copper to over 20 cm. the shooting hole cause delamination of > the board in the area. A lot of black smoke and was also seen. The max > voltage of the board is about 50V. The board worked fine for more > then a > year. What could be the failure mechanism? Could it be due to > conductive > filament formation (although the PCB should be free of that)? > > Thanks > > Gil Zilber > Elta Systems > > The information contained in this communication is proprietary to > Israel Aerospace Industries Ltd. > and/or third parties, may contain classified or privileged > information, and is intended only for > the use of the intended addressee thereof. If you are not the > intended addressee, please be aware > that any use, disclosure, distribution and/or copying of this > communication is strictly prohibited. > If you receive this communication in error, please notify the > sender immediately and delete it from > your computer. Thank you. > > > This message is processed by the PrivaWall Email Security Server. > > --------------------------------------------------- > 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 > ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------