Electronics Forum | Wed May 22 13:40:24 EDT 2002 | Hussman69
Boy, I step out for a bit and everybody picks on me (just joking). I believe I may have been off base a bit. Checking every bit of your stencil design is very good - I do that too. I calculate LXWXH and reduce or over print where needed, depending
Electronics Forum | Wed Feb 22 10:00:58 EST 2006 | dougs
We've just set up a couple of products with 0.5mm pitch uBGA devices on them, i went for 5thou thick, laser cut nickel (to aid paste release) square pads same size as the diameter of the uBGA pads. Or you could go to a 4 thou nickel stencil, better
Electronics Forum | Tue Feb 04 22:28:16 EST 2003 | davef
You could reduce the paste by about 70%. Solder balling and tombstoning will be the issues to fight. The drivers to these don't change with the component size. Use the fine SMTnet Archives for background. Aperture Size and Thickness of Solder Pas
Electronics Forum | Thu May 21 02:05:40 EDT 2020 | SMTA-Aakash
Refer to IPC 7525 (Stencil Design Guidelines). You will find a lot more information there.
Electronics Forum | Wed Sep 30 16:38:49 EDT 2020 | 2219576
thanks good information thanks for sharing Br// mANOJ https://smtinsight.com/
Electronics Forum | Tue Feb 02 22:57:32 EST 2021 | pnguyvu
Hello Charliem, Contact Steve Yen ( Steve@usastencils.com )at USA STENICLS INC. He'll give you better idea overprint or step . He has solid experience in design smt stencil. We've been receiving very good stencil from Steve.
Electronics Forum | Thu Apr 30 23:28:17 EDT 2020 | SMTA-Davandran
Do considering AR and 5 balls rule during designing stencil aperture. it give better paste release. Aperture redesigning need to look into symptom that we are seeing on AOI. It will be given us idea hows to improve aperture design to improve SMT firs
Electronics Forum | Thu Mar 19 11:44:03 EDT 2020 | svajunasastrauskas
Hello, can someone share good practise how to calculate how many percent solder paste can be applied on solder mask for better solderability (by increasing stencil aperture). In eg, aperture is increased 30 percent, could it be more? Where find this
Electronics Forum | Tue Apr 21 21:49:26 EDT 2020 | SMTA-Samy
Why are you trying to overprint? Take some time to review this presentation by Chrys Shea titled SPECIFYING STENCILS TO OPTIMIZE PRINT PERFORMANCE. https://www.smta.org/chapters/files/Uppermidwest_Chrys_Shea_Presentation_Upper_Midwest_Expo.pdf
Electronics Forum | Thu Apr 23 07:34:15 EDT 2020 | stephendo
Stencil editing is something that you have to do to do well. And you have to look at the boards after the screen printer and after the oven. Reading white papers ain't gonna cut it. And then there will always be part pad combos that will introduce s
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