Tom, I don't know what your application looks like, but if you can hook up a TDR somehow you could measure the distance to the reflection. Do you have access to an X-Ray machine in your lab? This might be another method since it works on bones (though you might not have good enough resolution depending on the size of your flex). Unlike all the accomplished works on EMI, I don't have any scientific evidence, don't have any papers, didn't write any books, nor do I have any links to websites for the next method <grin>, but you can always try firing the thing up and bend the cable back and forth to see if you get an open. ...just giving the mouse some exercise... Craig -----Original Message----- From: Jackson, T L [mailto:t.l.jackson@xxxxxxxx] Sent: Tuesday, October 21, 2003 2:18 PM To: SI-List Cc: Johnstone, Ben Subject: [SI-LIST] Rigid-Flex Testing Does anyone have a good method for detecting partial breaks in a trace in the flex portion of a rigid-flex PCB? TJ Thomas L. Jackson, P.E. Senior Staff System Engineer Department L1-50, Remote Sensing System Engineering Lockheed Martin Space Systems Company Building 149 1111 Lockheed Martin Way Sunnyvale, CA 94089 Telephone: (408) 742-2013 Facsimile: (408) 742-7701 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu