Electronics Forum | Fri Jun 10 19:42:46 EDT 2005 | ktron
Thank D.B. Cooper, actually this LED has 3 sides termination but no termination at underneath of LED. So this LED tends to float rather than performing solder joint during reflow process.
Electronics Forum | Fri Jun 10 09:02:58 EDT 2005 | ktron
Hi Guys.. Does anybody had experienced with designing the stencil for Right Angle LED without any dewetting problem on the LED termination? Currently our stencil opening is 1:1 and we still got so high reject due to this problem. Pls Advise, thanks
Electronics Forum | Fri Jun 10 13:15:17 EDT 2005 | chunks
Hard to tell, but it looks as if this LED has no side termination, so it may only look like dewetting. If everything around this part is reflowing, I'd bet that's all this is.
Electronics Forum | Fri Sep 15 10:00:15 EDT 2006 | Joe C.
Hello Everyone, Does anyone have any experience with an SMT right angle LED from Panasonic, part number LNJ123W8PRZ. In our experience the pattern design from the vendor was not very effective (the part swam around on the pads & flipped backwards dur
Electronics Forum | Mon May 27 16:17:30 EDT 2013 | nikyta
Hi Eric, you have the right reduction on the stencils apertures? Also, a very oxidized solder paste can -and will do- promote and increase both the tombstoning as well as the solder balls.
Electronics Forum | Fri Sep 09 11:24:31 EDT 2005 | stepheniii
Talk to your paste supplier. The reps for a couple of pastes have been very helpfull on various problems. And I've seen pastes advertised as being good for reducing tombstoning. And they see lots of customers and therefore see lots of problems and
Electronics Forum | Mon Dec 20 22:41:42 EST 2010 | grantp
Hi, We had it for a while, but had to take it out and replace it with normal convection. I mean the soldering quality is absolutely amazing, and the joints looked perfect, however it was a horror for tomb-stoning. We tried all types of stencil apert
Electronics Forum | Tue Aug 14 16:26:21 EDT 2007 | slthomas
So it's a C-n-C clearance issue? Could you go with the other cutnclinch unit...which ever you have, get the other one (one's right angled, one's offset at 45�)? Yeah, I know, they're not cheap. Other than that, hand place some of the SMT in chip bon
Electronics Forum | Tue May 03 15:19:12 EDT 2005 | cuculi54986@yahoo.com
Thanks for the suggestions. We have been going around the dome to pick from the base. The placement machines are Panasonic chipshooters - MV2VB and MV2C. I have several problems with the MV2C. The K-type feeder plates were moved by my predeces
Electronics Forum | Fri Dec 02 17:28:35 EST 2005 | ratsalad
We have a TCM-V822 over in the warehouse that had a severe head crash. If you suspect you have a bad servopack, contact Unidec. They can test it for you. If it tests bad they can rebuild it for you and you won't have to wait for months to have o
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