Electronics Forum | Mon Mar 08 11:54:06 EST 2004 | Wayne Smith
Currently experiencing a problem where the plastic molded bodies of tantalum capacitors are cracking during my SMT processing. Caught after our conformal coating process. I don't know where in the process they cracked. Currently running an exper
Electronics Forum | Thu Mar 02 13:20:26 EST 2006 | inds
jagman, take a hard look at a capacitor under the high mag microscope before you start assembling it.. I remembering seeing cracks even before the assembly. apparently all chip capacitors have crack at the intersection between the capacitor head and
Electronics Forum | Wed May 25 21:03:30 EDT 2011 | thanhnguyen22
Hi All, I am new the PCBA process fabrication. I have found many cracks in the PCB after we have cross sections analysis. The cracking has same kind of pattern. It happens betwen the solder and the PCB, or between the solder and the part, BUT not be
Electronics Forum | Thu Aug 15 16:45:09 EDT 2019 | stephendo
I just found this. https://www.avx.com/docs/techinfo/CeramicCapacitors/cracks.pdf It is extremely dated but still interesting. From the conclusion; " but both thermal shock and overstress cracks propagate at angles near 45°. Defective components h
Electronics Forum | Tue Oct 18 15:50:01 EDT 2022 | smith88
IPC states chips and cracks in glass body are defective if beyond specifications. Chips or cracks in glass body beyond the part specification, see Figure 9-18. • Cracked or damaged glass bead beyond part specification (not shown). On some glass
Electronics Forum | Sat Feb 02 09:33:33 EST 2002 | davef
�8.4.2, Cracking Of Soldered Joints in the epic "Soldering In Electronics" by RJ Klein Wassink [Electrochemical Publications,ISBN 0 901150 24 X] covers cracking differented by: * Overloading * Creep * Fatigue You can't go wrong by starting there.
Electronics Forum | Thu Apr 10 07:24:56 EDT 2003 | pjc
I had a similar problem with cracked caps. I checked all my processes and finally found that the caps were cracked in the tape. Check the condition of the caps in the tape. This was unique to one mfg.- EPCOS.
Electronics Forum | Wed Jun 25 18:35:28 EDT 2003 | Brian W.
Most of the time, Ceramic cracks are cracked due to mechanical stress. Check your depaneling methods. Cermaic caps that are close and perpendicular to the board edge are especially susceptible.
Electronics Forum | Fri Sep 03 11:28:18 EDT 2004 | KenF
Fine crack in multi-layer ceramic capacitor (MLCC) may not be detectable by capacitance check.Could anyone out there advise which is the most appropriate method to test/detect fine crack ?
Electronics Forum | Tue Aug 30 15:39:37 EDT 2005 | esoderberg
We are experiencing cracking of 1206 .1uf/50V capacitors on our boards. Design is keeping the caps away from the board edge 0.200 and perpendicular to the longest edge but still they crack even in the interior of the board. Recommendations? bds are
