Electronics Forum | Fri Sep 17 09:44:26 EDT 2004 | davef
We agree with Russ. * Haven't used them in 10+ years. * Size of keepout for the stepped apertures needs to be large. * Manipulating aperure size to manage paste volume for specific components is not difficult.
Electronics Forum | Thu Dec 09 16:10:41 EST 2004 | Jerry
Although its not laser based but actually white light base system. Have a look at http://www.christopherweb.com/koh1.html
Electronics Forum | Thu Dec 09 22:45:30 EST 2004 | kanwal324
We are using UBM laser scane offline. You can search for it in google. Nice machine using from thelast eight years.
Electronics Forum | Sun Feb 06 12:59:33 EST 2005 | GC
Please try to use 6-8 mils ..you are overloading pads surface ..Please verify paste volume vs surface..Have fun
Electronics Forum | Wed Feb 22 10:32:37 EST 2006 | amol_kane
you could do a capability analysis on the printer.....setup the printer with your print parameters and select a metric (say paste volume deposited) and find out Cp and Cpk values
Electronics Forum | Fri Aug 01 00:22:46 EDT 2008 | fowlerchang
Pattern design, paste volume,printing misalignment, place misalignment,reflow process include N2 usage. All the factor above can make tombstome happen. And the most important factor is placement misalignment except design issue. But pls check the sol
Electronics Forum | Tue Nov 30 07:53:16 EST 2010 | edmaya33
could be a printer or stencil issue. try to check your printing repeatability. Suggest to use SPI for a checking paste volume/height/area.A regular stencil cleaning may reduced your headache.
Electronics Forum | Mon May 27 04:28:30 EDT 2019 | SMTA-Rogers
Dear Steve, Thanks for your feedback in our experience add solder paste volume is better for the voids reduce of LED type components.
Electronics Forum | Sat Oct 19 04:18:17 EDT 2019 | SMTA-Davandran
Dear Dave, Thank you for your advice on this issue. Shall butt connector withstand high mechanical strength after increase paste volume.
Electronics Forum | Tue Nov 26 18:35:20 EST 2019 | slthomas
It's hard to tell from the image but it looks like there isn't much room for a heel fillet. Seems like that could contribute to your voiding (or poor wetting) if there isn't enough paste volume there.
