Hi Don, What stencil thickness and opening were used? My suggestion is to bake the part before you put them on. Ted --- Don_well <[log in to unmask]> wrote: > Hello all > A 1.27mm pitch BGA connector(300Pins 10Lines) > was assemblied on a flex board.The NSMD pad size is > 0.65mm and the assembly area is strengthened by a > 2mm rigid FR4 board.We pilot run 10 pieces of board > and found 100% BGA connector bridging.Bridging > ,bridging and also bridging.Can you tell me why?? > > B.regards > > Don > Huawei > > --------------------------------------------------- > Technet Mail List provided as a free service by IPC > using LISTSERV 1.8e > 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/html/forum.htm for additional > information, or contact Keach Sasamori at > [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- > __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------