Min Jun, Have you been talking w/ Autosplice? They have quite a bit of materials expertise. Their hdqtrs is 1 block from my office. I have an old PCB/backpanel friend who is at executive level there now. If you'd like I can fwd your e-mail. dw At 06:58 PM 9/20/2008, you wrote: >$B!!!!(BNee hao Min Jun, >$B!!!!(BFor electroplated nickel obviously you do not have 'back pad'. The >"brittle failure" may indicate >$B!!!!(Binsufficient solder temperature. >Bring yur cross-sections to my workshop and we discuss the issues on Monday >at IPC Midwest Conference. >$B!!!!(B >$B!!!!(BRegards, >$B!!!!(BWerner Engelmaier >$B!!!!2DpQ@-@h@8(B >$B!!!!(BEngelmaier Associates, L.C. >$B!!!!(BElectronic Packaging, Interconnection and Reliability Consulting >$B!!!!(B7 Jasmine Run >$B!!!!(BOrmond Beach, FL 32174 USA >$B!!!!(BPhone: 386-437-8747, Cell: 386-316-5904 >$B!!!!(BE-mail: [log in to unmask], Website: www.engelmaier.com > > >************** > >Looking for simple solutions to your real-life financial >challenges? Check out >WalletPop for the latest news and information, tips and calculators. > >(http://www.walletpop.com/?NCID=emlcntuswall00000001) > >--------------------------------------------------- >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 -----------------------------------------------------