Electronics Forum | Wed Aug 18 08:58:49 EDT 2004 | M.Enright
We are finding cracked capacitors at both first pass and second pass.
Electronics Forum | Mon Apr 18 13:10:33 EDT 2005 | paulhaines2000
I need to load SMT tant. capacitors into sticks for a special placement application on a GSM for track presentation. Does anyone know a company that mfg's custom tubes/sticks for SMT components?
Electronics Forum | Wed Jun 13 17:15:48 EDT 2001 | medernach
Yes, I've seen it recently and it's most likely a component problem. A cap is essentially a sandwich comprised of multiple layers. the layers are either wet film or dry film. The end terminals may either be hot soldered or sputtered so there are a
Electronics Forum | Thu Jun 28 13:48:46 EDT 2001 | markhoch
One more place to check, ( if cracked caps are apearing in the same location on all boards), are board supports in your pick and place machine. I've had instances where operators are not tightening board supports down causing them to shift during pro
Electronics Forum | Tue Sep 08 15:11:26 EDT 1998 | Mike Demos
Rich: In my experience, I have seen three cases of SMT Capacitors cracking: 1. Due to thermal shock when entering the wave solder. Note that these were 1210 package sizes on the wave solder side of the boards. We were able to trace this back to th
Electronics Forum | Tue Aug 17 15:52:29 EDT 2004 | davef
We agree with Rob. It sounds like someone is trying to pound your caps through the board.
Electronics Forum | Fri Oct 27 13:49:11 EDT 2000 | dpoling
We are currently having problems with tombstoning and minor lifting on small SMT stasck film capacitors. Does anyone have any ideas?
Electronics Forum | Thu Oct 21 15:33:56 EDT 2004 | Indy
I have seens cracks from AVX capacitors too. The thing is they already have micro cracks that are not visible to naked eye. When the capacitor is stressed the crack expands. One way of mitigating this is by tweeking your process. See how your singula
Electronics Forum | Wed Dec 31 23:02:19 EST 1997 | Scott McKee
| Has anyone had any experience with thermal shocking | and cracking of SMD capacitors during the rework process? | My company was advised to preheat capacitors to 125 C | at a rate of 2 C/sec before replacing them onto boards. | Would this maybe
Electronics Forum | Mon Aug 16 11:25:46 EDT 2004 | davef
A little more information, please: * Describe the location and pattern of your cracks * Tell us the type of capacitor that you're destroying
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