SRC Forum - Message Replies
Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and Answers
Topic Posted by: Reliability & Maintainability Forum
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Posted by: Michael Moriarty
Date posted: Thu Mar 11 18:59:37 US/Eastern 1999
Subject: Kapton insulated flexible circuits
Does anyone have information regarding the fielded or predicted reliability of Kapton (polyimide) insulated flex circuits. Our potential airborne application is with a "twist-flex capsule" in a turret assembly. Please note the distinction between flexible circuit and lead wire. I'm well aware of the widely documented "arc tracking" failure mechanisms associated with bundled Kapton-insulated lead wire on aircraft. My goal is to assess the probability of arc tracking occurring with single layered flex circuits, not lead wire. Any help would be appreciated.
Subject: Evaluation of the Twist-flex Capsule
Reply Posted by: Mark Mobley
Organization: Baker Hughes Inteq
Date Posted: Tue Mar 23 11:21:31 US/Eastern 1999
You have two sure options: 1. Check the manufacturer's data, if its not sufficient you are forced into the 2nd option,
2. Build a test/evaluation fixture and find out. You should try to duplicate the "use environment" as much as possible.
It maybe possible to accelerate the evaluation using a higher temperature (only if you have an acceleration factor assoicated with breakdown at temp.) Have fun.