Werner, The data sheet lists the insulator material as LCP. The pins are stated to be a copper Alloy with Gold over Nickel. Leif Erik Laerum Quality Assurance Manager Texas Memory Systems [log in to unmask] Tel: (713) 266-3200 x468 www.texmemsys.com Werner Engelmaier /* wrote: > Hi Leif > You do not say how long that connector is and what the connector body material is. > My guess on very skimpy info is that you have a too long connector made with an unsuitable connector body material, with connector pins made of some connector pin metal, like BeCu, that while it is a good connector pin material with good spring characteristcs, it makes for bad solder joints > > Werner > > > > > > > > -----Original Message----- > From: Leif Erik Laerum <[log in to unmask]> > To: [log in to unmask] > Sent: Fri, 15 May 2009 5:16 pm > Subject: [TN] Connector with loose pins > > > > > > > > > > Technetters,? > ? > > I have a less scientific question, but I hope someone has some > experience with a similar problem.? > ? > > We have a .090 think motherboard where one particular part number > connector frequently have loose pins. It is 33 cm by 16mm. There are > lots of other types of connectors on the board that does not have > issues. We only have problem with one part number. These connectors are > at the very front of the board. They go in the oven first. This is a > leaded solder board and we use SN63/Pb37 solder. The loose pins tend to > be at the end of the connector and on power planes. On some boards it > appears that the connector sort of twists or bows a little bit.? > ? > > The problem is that this surface mount connector is very hard to fix. > The pins frequently short and due to space limitations, it is hard to > reach them with the tip of the soldering iron. They also tend to develop > shorts easy. This makes it even harder to fix after reflow.? > ? > > We have tried reducing the cooling at the end. We have sent the boards > through the oven with the mate installed in order to stiffen up the > connector. The profile was checked as late as today. Nothing jumped out > at me.? > ? > > Does anyone have experience with a similar problem that they managed to > solve?? > ? > > Thank you.? > ? > > --------------------------------------------------- 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 -----------------------------------------------------