Keep in mind the IST is destructive and can only be performed on test coupons - not actual boards. It is not like a bare board continuity check. You would have to do a lot of upfront design work to make certain that your coupons could be used in the tester. While there has been some correlation testing performed with thermal cycling/thermal shock type tests, the IPC is trying to do a round robin to correlate with thermal stress testing. However it is not going too well. Susan Mansilla Technical Director Robisan Lab ################################################################ 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 ################################################################