Hello Does anyone have any ideas where I could find out more information by "constructional type" of the predicted life and failings, due to ageing, of discrete high reliability /military standard electronic components? We want to have confidence that electronic components fitted to a 25 year old system will continue to function for 35 years. These components are in a sealed ( non hermetic) benign environment rarely being powered up. Does anyone have any histories/references by "constructional type" of discrete electronic components degrading and failing due to age? Alan Peters Failure Analysis Engineer BAE SYSTEMS Plymouth ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender immediately by telephoning +44(1252) 373232. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------