We have been using LN2 to promote infant mortality fall-out for some time now. It is not common for a device to fail for temp changes, but it does happen more at heat than cold. You may want to contact a component engineer in your company or at the vendor to perform a component analysis. There may be a bad lot. -----Original Message----- From: Darrel Therriault [mailto:[log in to unmask]] Sent: Tuesday, July 27, 1999 8:01 PM To: [log in to unmask] Subject: [TN] Freeze Spray and BGAs TechNet, A curious situation happened when we used freeze spray on a BGA; it quit working. The BGA seemed a bit hot to the touch and we were getting some flakey operation, so we decided to hit it with some freeze spray. It quit working altogether. I have not had a chance to check out the package for a failure mechanism, but I will be replacing it to see if it was that part causing the failure. Does anyone know of any specific thermal issues with using freeze spray on BGAs?? We use both TBGA and PBGA, so I thought I'd ask the question before I go and inadvertently destroy more of our parts. Regards......DT ############################################################## TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ############################################################## ############################################################## TechNet Mail List 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 web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################