Electronics Forum | Thu Jun 22 11:21:59 EDT 2000 | Chrys Shea
My personal opinion: Use 20 mil squares with the corners radiused at 5 mils. The squares offer 2 benefits: 1) A little more paste, which makes for a higher diameter solder column that is more reliable 2) Better stencil release of the paste. It's e
Electronics Forum | Thu Nov 30 21:13:55 EST 2000 | Dave F
Can't find "WS601" on the Alpha site. What is that stuff? So, with nothing to go on, I'll just guess ... Yer probably cold welding the solder particles together. The nozzle size (inside diameter) determines the dot size. * With glue, small dot si
Electronics Forum | Fri Jan 16 07:06:47 EST 2004 | Mika
Component manufacturer often have recommendation for pad layout and process setup. This should be used as a guideline to help You to set up the process. Exactly what type of component is this, uBGA? We populate 64 I/O uBGA's on our pcb's with 0.3 mm
Electronics Forum | Fri Dec 09 11:00:47 EST 2011 | davef
Using common wire size and through hole diameter, we'd expect that the wave solder process would completely fill the through hole and that you wouldn't need to get involved in providing stencil openings, pasting the through hole or reflowing the jump
Electronics Forum | Tue Jun 10 11:44:25 EDT 2014 | patel_daxa29
It is very hard to say by looking at picture(solder joint quality).Overall appearance looks good.If you think is not sufficient solder or meeting required standard, enlarge opening of connector on solder stencil. Make all conn. aperture square or in
Electronics Forum | Mon Sep 17 17:09:32 EDT 2001 | jschake
Flux: No-clean pastes tend to have a wider print process window in terms of print speed and pressure. More importantly, no-clean pastes are more tolerant to changes in temperature and humidity. They also exhibit longer stencil life than water-solub
Electronics Forum | Mon Sep 24 12:58:31 EDT 2018 | vincentl
We are attaching 0.50mm diameter SAC 305 solder balls onto 0.38 diameter Au plated pins placed at a 0.80mm pitch (pins are pressed into a plastic insulator). A tacky flux is then stenciled onto the pins using a stencil with.a 0.38mm diameter aperture
Electronics Forum | Mon Dec 13 00:48:33 EST 1999 | armin
Hi All I have a 0.7 mm diameter hole for vias, what�s the minimum annular ring for this hole diameter? What�s the term unsupported and supported holes refer to in IPC-2221 9.1.2 Annular Ring Requirements? I have a proto-type PCB (designed by our R&
Electronics Forum | Thu Feb 18 12:56:18 EST 1999 | Bob Barr
We are using .040" diameter fiducials (global and local) on our boards. They are solder covered and HASL. I get batches of boards where the p&p vision system has trouble reading the fiducial. The fiducial looks dark on the screen. The board vendo
Electronics Forum | Wed Dec 10 16:15:24 EST 2008 | terryl
on the front end in design, minimize the pth connections to ground planes. this takes alot of work by the pcb designer and the approval of the design engineer. connect maximum of 4 ground planes to pth, minimum 1 plane. use spoked connections. ev
