Electronics Forum | Wed Feb 02 08:51:25 EST 2005 | Dougs
we have a capacitor cracking on one of our boards, there are four of the same cap on the board and only one cracks, we are seeing about 6% of the component cracking. it's not near the edges of the board and he board is 2.4mm thick so i dont think it
Electronics Forum | Sun Dec 03 15:35:44 EST 2000 | Michael Nguyen
Wow. And I thought I was the only one having problem with ceramic capacitors.I too am having problem with cracking ceramic capacitors 1206 package.We changed vendors and still having the same problem. I had to reverify my entire process and I had to
Electronics Forum | Fri Feb 28 10:02:39 EST 2003 | bradlanger
Thanks for all the input on this thread. My company bought an FKN depanalizer and that solved our problem. I am also working with our design engineers on laying out the boards without the caps near the edges.
Electronics Forum | Fri Feb 28 16:23:39 EST 2003 | genny
If you can't get rid of all caps near the edges, don't forget Neil's advice above regarding parallel vs. perpendicular. I have seen a 90 degree rotation make a huge improvement in the reliability of some caps.
Electronics Forum | Mon Feb 24 19:16:38 EST 2003 | Neil
Brad, This is a common problem and may relate to the design of the board. In all cases when a device such as a capacitor is place near the edge of the board and the board must be de-panelled, the capacitor must be parallel to the break line. If the
Electronics Forum | Wed Feb 05 12:14:55 EST 2003 | slthomas
Increasing the score depth enough to make manual depaneling safe may very well make the panel useless, depending on your automated processes and handling requirements and methods. We use depanelers daily, hourly, even. We prefer to route the boards
Electronics Forum | Sat Feb 15 06:40:14 EST 2003 | Hans Koerner, Germany
It is a serius problem with that mulilayer ceramic caps! In automotive applications you have to use 2 in series for one single cap. During depanelizing you create a mechanically wave in the board, so 3.. 4 mm. Best way is not to do such a wrong desig
Electronics Forum | Wed Feb 05 05:29:33 EST 2003 | Rajinder Sharma
If you are facing problem of craked capacitor only after breaking of the panel into individual PCB's, this may be due to stress being generated on the capacitors terminals. The stress may be due excess pressure being applied on the panel for breaking
Electronics Forum | Wed Feb 05 09:11:05 EST 2003 | davef
Here is some talk about MLC capacitor flex cracking...what happens with depanelizing: http://www.kemet.com/KEMET/web/homepage/kechome.nsf/vapubfiles/f2106/$file/f2106.pdf Here are some other files on breaking capacitors: http://www.avxcorp.com/doc
Electronics Forum | Sun Dec 03 10:05:22 EST 2000 | Steven J
Greetings to all. We are currently experiencing cracking of the ceramic capacitors, on both primary and secondary sides of the PWB. The components range in size from 1206, 1210, to 1815s. The cracks do not appear to alter the electrical properties
