Electronics Forum | Mon Mar 07 08:22:09 EST 2005 | davef
Via in pad can have any size hole, but you're correct. The larger the hole, the more solder that is scavenged from the solder connection. We believe that a proper via in pad design will either: * Move the via to the edge of the pad and cover the vi
Electronics Forum | Thu Dec 21 13:33:46 EST 2006 | ppcbs
The problem with super glue is that is has a cyanide base that turns into a toxic gas and evaporates when heated. See IPC-7095. Via's should be fully plugged with solder mask at the fab house. If your PCB designers are not up to speed on IPC requi
Electronics Forum | Mon Feb 25 12:21:16 EST 2008 | stevek
Rather than having the artwork cover the via as with tenting dry film, and letting the mask do what it will, the preferred way is to do a second op silk screen with something like SR1000 just in the vias themselves to plug them. This doesn't always
Electronics Forum | Thu Feb 19 14:09:45 EST 2009 | leemeyer
I apologize in advance if I offend anyone with this question as it does not pertain to SMT. I am guessing that you folks see a lot of other types of components in your facilities. I am looking for a banana jack that has an integrated switch. The swit
Electronics Forum | Wed Jul 29 07:02:50 EDT 2009 | thanhnguyen
yes i did test it manually, and it working fine.At the plug in, that the only way to plug it. With my ohm meter,24 volt present when you turn it on. The wierd thing is it blowing during head going down,then will sucking up when it move up.Vacuum valv
Electronics Forum | Fri Jun 03 15:19:19 EDT 2011 | jeremymc
After reseating the M controller boards I was able to get further than I had previously, no save status error, and was given an error about the voltage being wrong. During my last run my company had an electrician in to rewire somethings and put a
Electronics Forum | Fri Jun 21 13:05:58 EDT 2002 | surinder
Hi Stephan, Thanks,Yes there are thieving pads on Ic's .Also the two QFP, which mention,that will be removed by modifying the design in long run ,if the results/Yields are okay as with Glue as Compared to solderpaste process. Yes you are right here,b
Electronics Forum | Fri Oct 22 04:09:22 EDT 2004 | christina
Is there anyone who knows the yield rate difference for SMT on multi-flex boards and rig-flex boards ? Basically, I think the yield rate should be higher for rig-flex than multi-flex due to the poor dimensional stability of polyimide, since multi-fle
Electronics Forum | Mon Aug 07 09:58:41 EDT 2006 | nodlac
Davef's link is a great one. Mine pales but may be helpful... - This one is from Georgia Tech on Yield... http://www.cbar.gatech.edu/about/publications/Analysis%20of%20Factors%20that%20Affect%20Yield%20in%20SMT%20Assembly.pdf - http://www.cbar.marc
Electronics Forum | Fri Nov 17 14:55:27 EST 2006 | CK the Flip
Typical of QE types. They don't know the entire process of qualifying what makes a "good" board (besides FPY), so they just arbitrarily come up with 95% FPY as a benchmark. Russ made a great point that alot of yield issues are design-related. Typi
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