Electronics Forum | Tue Jun 17 09:22:02 EDT 2003 | davef
Higher that recommended is more brittle. Look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=17906 Q2: Will some of my Ceramic Caps crack during the wave soldering process because of the heat? A2: Probably Q3: Can you see any pos
Electronics Forum | Tue Aug 17 12:03:47 EDT 2004 | mmjm_1099
Do a search on cracked caps in the search bar above. There is lots of past history for alot of us in this area.
Electronics Forum | Thu Sep 01 04:41:55 EDT 2005 | dougs
We had a problem with cracked caps a few months ago,they were near the middle of the board, turns out it was caused when breaking them out of the panel, changed the panel layout and made them v-scored, problem solved. just an option, there's lots mo
Electronics Forum | Wed Dec 28 08:26:43 EST 2005 | John
We found the DIP inserter was cracking SMT decoupling caps in the past.
Electronics Forum | Tue Nov 07 18:18:03 EST 2006 | Andrea
I am wondering how to move from hand soldering our ceramic caps to doing a reflow type process. The reason for the change is too many cracked ceramic caps. I have asked our vendors to assemble our boards via reflow but because of our hardware (swaged
Electronics Forum | Mon Jul 07 00:11:10 EDT 2003 | praveen
if the capacitors are placed very near to the edge and their position is 90 deg than it may cause crack.4thly if the reflow ramp rate is more than 3 deg C then it may crack. 5th ly if the solderin tip temp. is very high and soldering bit is very thi
Electronics Forum | Tue Nov 08 17:12:10 EST 2005 | Erik
I haven't heard of heating boards pre-depanel either. We have done extensive studies on cracking of ceramic caps close to V-scored edges and have decided to have our board vendors pre-rout any areas with caps close (
Electronics Forum | Fri Dec 30 11:54:53 EST 2005 | John S.
Seen cap cracking before. It can be caused by thermal stress as noted above, but don't discount mechanical stress and handling. Your depanelization method is a strong candidate. We applied strain gages to baords and benchmarked various mechanical
Electronics Forum | Thu Sep 03 14:09:22 EDT 1998 | Matthew Park
Rich, From my experience, few causes of capacitor cracking are: - mechanical stress caused by pick'n place nozzles and chucks. Try to isolate and find cracked caps before boards go thru reflow or wavsoldering. - thermal stress by reflow pro
Electronics Forum | Tue Feb 23 11:05:46 EST 2010 | kjs123p
We had this same problem several years ago. The caps and resistors were cracking when we snapped the boards apart. We now use a pizza cutter style depanelizer. A couple of manufacturers that I know of are CAB and Fancort. I hope this helps.
