Electronics Forum | Thu Jun 09 09:08:09 EDT 2005 | russ
It's normal for us when we review design. We have found that in the Y axis we need .015" whereas in the X axis we can use .005" spacing. this relates to our nozzle size vs. pickup skew etc... This wouldn't apply if there are parts taller than XXX
Electronics Forum | Wed Apr 15 17:16:00 EDT 2009 | rmitchell
Hi, I am trying to reduce some 0402 cap tombstones. The main cause is the pad spacing is a little too far apart and the parts are as tall as they are wide .5mm I am stuck with the pad spacing for a while. All other parts are soldering well, even 0
Electronics Forum | Mon Sep 18 11:55:35 EDT 2000 | Ricardo Fuentes
Hi! cold someone advise me about the minimum gap allowable in between 0404 parts. The minimum distance is because of the behavior on reflow, the re-work difficulty or anything else. Thanks
Electronics Forum | Tue Apr 01 18:21:48 EST 2003 | slthomas
I've never printed adhesive but I assume that aspect ratio still plays a part with release. Maybe that .006" is just to thick to get good release. Can you step your stencil down from .006" to .004" or .005" for the 0402's?
Electronics Forum | Mon Oct 27 09:54:40 EST 2003 | John
We're just now beginning to see 0402's in our designs. Can anyone make recommendations on stencil/aperture designs and print parameters? I'm seeing skips on a small number of joints on these parts. Thanks in advance, John
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 | Sun Mar 06 20:08:38 EST 2005 | mrduckmann2000
Davef, You have a good question. If we had perfect design engineers out there that would use the proper component spacing and not put SMT parts between and around thru-hole parts - glue and wave would work perfectly. I have done this with great su
Electronics Forum | Fri Mar 04 15:22:17 EST 2005 | russ
Glad to hear a little success from ya Duckmann! i have stenciled mask in the past and I can tell you that stencils are expensive. They are basically a step stencil, you will need full thickness for the area(s) you are going to apply mask and you wi
Electronics Forum | Wed Jul 14 21:34:16 EDT 1999 | karlin
| | | | | Hi, | | | | | | | | | | I need some urgent informations on stencil design guidelines on how to perform epoxy printing on 0603 and 0402 components. Could anyone help? ( Reflow process is not possible because of some other constriants) | |
Electronics Forum | Tue Jul 13 14:19:00 EDT 1999 | JohnW
| | | Hi, | | | | | | I need some urgent informations on stencil design guidelines on how to perform epoxy printing on 0603 and 0402 components. Could anyone help? ( Reflow process is not possible because of some other constriants) | | | | | | Sec
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