SRC Forum - Message Replies

Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

Original Message:

Posted by: Per Jonsson (per.jonsson@boforsdefence.se )
Organization:Bofors Defence
Date posted: Mon Aug 16 8:31:11 US/Eastern 2004
Subject: Long term storage of electronics
Message:
I have a question about electronics in general and circuit boards in particular. Is there research done about how long it is possible to store electronic devices? Does anything happen if you store a cicuit for more than 20 years or is there a good chanse that everything works allright even after so many years. Is there any actions to take during storage to decrease the risk of failure? Thanks for any help on the subject! /Per

Reply:

Subject: Long Term Sorage of Electronics
Reply Posted by: Ken
Date Posted: Thu Aug 19 8:52:48 US/Eastern 2004
Message:
Check in the RAC Toolbox, there are two references for dormant/storage of devices. One is for failure rate conversion and the other is for dormant failure mechanisms. The later shows that temperature and humidity are the predominate accelerators for items in a dormant state. Thus temperature and humidity control are key. After 20 years, obsolescence may be as big a concern as dormant failures. A good reference for degradation is “Electromigration and Electronic Device Degradation” authored by Christou and published by John Wiley & Sons.

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