Hey group....along this same thread, we have a surface mount coil that is suspended in a plastic package design....and sometimes the coil breaks loose from the package. Our first thought is, of course, to squirt a heapin' helpin' of RTV (not really RTV, a product somewhat like RTV "of a grade that doesn't liberate acetic acid on cure" heh-heh) underneath the coil to support/suspend/damp the part from shock. A question the coil manufacturer has, is will the TCE mismatch (or any other issue like curing of the RTV) potentially cause the coil wire to break?? My experience says "NO", but anybody out there have a bad experience with this??? Appreciate any responses, thanx! Jeff Hempton United Technologies Electronic Controls PS... Don't squeeze RTV from the middle of the tube (an RTV mfg'er svc announcement) ______________________________ Forward Header __________________________________ Subject: Re: [TN] RTV for SMT components Author: Eric Christison <[log in to unmask]> at Internet Date: 3/11/1999 9:57 AM > I have a board which has failed shock and vibe testing, due to a SMT > component breaking off. I have been told to use an RTV to hold the part > on. > Could I please get some help. What is an RTV? Who do I get them from? Is > there automated ways of applying? I would be more than happy to hear from > vendors, but maybe they should respond directly to me. > Thanks. > > Steve Quinn > Steve, RTV is a silcon sealant - like the stuff you put round the edge of your bath to stop it leaking. RTV is Dow Corning's trade name for it's family of sealants. If you really want to use this to stop the device leaving the board, make sure you get hold of a grade that doesn't liberate acetic acid on cure. Normally it'll tell you on the side of the tube and if it does it'll smell of vinegar. You can probably tell that I wouldn't rate this as a solution to your problem - but good luck anyway! Eric Christison ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################