Just curious...what sorts of temperatures/durations do these downhole drilling electronics see? Ralph Vaughan > ---------- > From: Werner Engelmaier[SMTP:[log in to unmask]] > Reply To: TechNet E-Mail Forum.;[log in to unmask] > Sent: Tuesday, March 21, 2000 7:46 PM > To: [log in to unmask] > Subject: Re: [TN] Vapor Phase reflow chemicals and equipment.. > > Hi Steve, > Downhole drilling electronics sees the most severe operational loading of > any > ellectronic assemblies. Design this stuff as robust as possible with the > least CTE-mismatch as possible, and be careful with the encapsulant > material > chosen. > Vapor phase soldering is a good idea; but, is there nothing between 253 > and > 215C? > Good luck! > Werner Engelmaier > > ############################################################## > 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 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 1.8c ############################################################## 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 Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################