Electronics Forum | Sat Apr 27 15:45:25 EDT 2019 | smith88
Thanks I appreciate the information
Electronics Forum | Wed Sep 21 08:43:46 EDT 2005 | kmeline
We are having problems with a 1210 cap moving as far as a 1/4 inch from its pads during reflow. We have verified the placement before reflow. They will tombstone some of the time. There are smaller and larger parts around this location and none of th
Electronics Forum | Wed Sep 21 12:14:47 EDT 2005 | Rob
It's quite a big cap so try taping over about 25% of both apertures to restrict the volume of paste printed then see what happens. Also, is anything interfering with the part during placement? or are you 100% sure it's going into the oven ok? if no
Electronics Forum | Thu Apr 25 11:30:09 EDT 2019 | davef
Numerous technical papers on the web document the moisture sensitivity of tant caps. Here's one: https://nepp.nasa.gov/DocUploads/CE5125B5-E0EB-4CFA-8867BE3F3E342CA5/moisture%20effect%20Ta%202C%20M.pdf
Electronics Forum | Wed Sep 21 20:03:34 EDT 2005 | kevinbooth
I am going to agree with Rob a little. It is also possible that a internal ground plane might be under or connected to the pads of this cap thus causing a increase in temp to this part during reflow. This can cause parts on occasion to jump from the
Electronics Forum | Mon Jul 09 11:56:39 EDT 2007 | hussman
Thermal shock. Be sure you do not jump more than 100 degrees C between your last pre-heat and wave.
Electronics Forum | Sat Apr 27 10:43:25 EDT 2019 | smith88
I have read this I guess the question I should be asking is what have you done when finding these? IPC says it enters the body so it is a defect many in my group feel it should not be because they are not hermacticaly sealed anyway. I am needing thou
Electronics Forum | Fri Mar 16 18:32:06 EST 2001 | djarvis
Anyone using "Hitano" 0805 capacitors please check their values before running. I just got stung by parts labeled as 100nf when they were in fact 10nf. We found five out of fifteen reels in the smd room incorrect, who knows what stores will find. P/N
Electronics Forum | Wed Sep 21 18:09:03 EDT 2005 | PWH
We've had parts jump off pads on occasion due to panels or boards that are restricted in a carrier during reflow. The boards/panels expand and the restriction causes them to warp thus popping parts around during cool down. Doesn't sound like your p
Electronics Forum | Sat Apr 27 15:42:53 EDT 2019 | davef
Your ppl are correct, the capacitor is not sealed. So, it is perfectly acceptable for the capacitor to have absorbed moisture. If your ppl don't either prevent moisture absorption or remove the moisture prior to soldering, their component could fail
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