Steve, We saw this occur some years ago with smt film caps. The first few top layers were peeling off in the aqueous. I sent a handful back to the factory for examination. They responded that they were working on better adhesion and process compatibility, but also that particular part had 90-100 layers of protective film, so losing a few layers wasn't a problem. We made sure that no "flags" were flying off the parts, but otherwise left them alone. They behaved fine, no problems with the customer. I don't recall any problems with profile conflicts. Bruce Tostevin Benchmark Electronics Hudson, NH > -----Original Message----- > From: [log in to unmask] [SMTP:[log in to unmask]] > Sent: Thursday, May 23, 2002 9:52 PM > To: [log in to unmask] > Subject: [TN] Film Capacitors...geeze! > > Hi all! > > Just started building an assembly that calls out film capacitors to be > used > in 64-locations on the board. Processed the assemblies in a typical manner > as > one would for most SMT assemblies, and experienced massive failures of > these > caps. They are PPS films. Unfortunately, this has been a first for > me...never > had to process these caps before. They are delaminating...the layers of > film > are flaking off from the caps. > > Can anybody tell me how I should assemble these devils? Went to the web > page > of the manufacturer, and they have a recommended reflow profile that is > 2-mins, 45-seconds long...to me, that violates the specifactions that > Kester > recommends for their paste to perform... > > Is using SMT film caps a bad idea? ( I think I know the answer, but I just > want a confirming opinion...) > > -Steve Gregory- > > -------------------------------------------------------------------------- > ------- > 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 > -------------------------------------------------------------------------- > ------- --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------