Steve, The downhole environment found in the oil/gas industry typically subjects monitoring and instrumentation packages to extremely high-G shock loads with harmonics, and also includes high temperatures, high humidity, radiation, and corrosives. Some of the downhole instrumentation companies have solved the shock and harmonic problem by clipping off the component leads and replacing them with short insulated stranded jumpers to the circuit board (i.e.: flying leads). The component bodies are bonded to the board, and the assemblies are encapsulated. It looks a little funny, but it works. Bob -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory Sent: Thursday, November 18, 2004 2:37 PM To: [log in to unmask] Subject: [TN] Assemblies built to withstand very high G-loads... Afternoon All! This is just a general question concerning assemblies that are built to withstand very, very high G-loads. G-loads that are much higher than airborn avionics, or even missiles. Is there any special processes that would need to be considered that would be radically different than what are used to build airborn avionics and/or missile electronics? If you can't talk about it I understand... -Steve Gregory- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 -----------------------------------------------------