Electronics Forum | Mon Nov 01 10:29:13 EDT 2010 | scottp
I've searched the archives and maybe my search skills aren't up to snuff but I couldn't find much. I'm curious what people are doing for 0.4 mm pitch BGAs, assuming a type 4 paste. Pad diameter? SMD or NSMD? Stencil thickness? Aperture diameter? Us
Electronics Forum | Tue Nov 12 00:49:37 EST 2019 | myke03o
I am optimizing a stencil opening for BGA with 0.4mm pitch and pad diameter of 0.2mm. Can anyone advice of stencil thickness and stencil opening I can use in order to have a good paste release. Thanks for all your answers.
Electronics Forum | Thu Nov 14 10:52:56 EST 2019 | jandon
Maybe something like this could work?
Electronics Forum | Thu Nov 14 18:25:07 EST 2019 | myke03o
Hi Jandon, Thanks, I will try it on my DOE.
Electronics Forum | Thu Nov 14 21:47:41 EST 2019 | sssamw
Yes, 0.25x0.25 square could work @0.1 thickness, use nano-coating or electroform stencil for better solder paste release.
Electronics Forum | Thu Nov 14 22:24:43 EST 2019 | dman97
Use a type 5 solder for maximum paste release.
Electronics Forum | Thu May 03 01:07:18 EDT 2007 | pavel_murtishev
Good morning, Worth system for 0.5mm or more pitch paste printing. For less pitch (uBGA, 0.4mm etc) framed stencil are preferred due to better tensioning. Main issue with them is handling. Stencil apertures that are used for tensioning might be easi
Electronics Forum | Tue Aug 20 21:39:29 EDT 2019 | sssamw
6 mil (0.15mm) for the 1.13mm pitch BGA, and 4 mil (0.1mm) for the smal QFN with 0.4mm pitch.
Electronics Forum | Mon Feb 16 14:18:30 EST 2009 | jorge_quijano
1000 0402's, Micro BGA, QFP 0.4mm pitch, TSOP), we are trying to know what kind of equipment do you recommend to use in our factory, we already have Screen Printer, Chip shooters, Reflow oven, AOI, Stencil cleaner (manual), X ray, ICT... what else do
Electronics Forum | Mon Jun 02 04:17:39 EDT 2003 | emeto
Hi Steve, Why are you so concerned about QFP(0.4) or BGA? If your equipment can manage, what's the difference? If you are designer do it better and use the cheaper or smaller package(you decide). If not use machine with vision recognition and your pr
