Electronics Forum | Fri Feb 24 13:39:35 EST 2006 | Chunks
I agree with Jerry. A 7 mil stencil should work just fine for 25 mil pitch parts and 0.050 pitch BGA's. I too go 6 mil, but whith proper screen printing, you can 7 mil. You can always do 5 ot 10% reductions if needed. Use the homeplate design on
Electronics Forum | Tue Jun 14 14:03:01 EDT 2022 | emeto
Would advice to mask only for trial. Cut the proper stencils is the solution.
Electronics Forum | Fri Apr 29 11:23:27 EDT 2022 | dontfeedphils
I typically use kapton tape when I need to mask off some apertures.
Electronics Forum | Fri Apr 29 06:13:26 EDT 2022 | 1_manuel
Hi there, I'm pretty new to the SMT manufacturing stuff, please be kind. I have to mask up some parts of a stencil. Is there a recommendation for some masking tape I could use? It should be sticky enough for temporary use but not that sticky that i
Electronics Forum | Wed Dec 07 18:37:24 EST 2005 | russ
You need a thicker mask/stencil, the openings should be .005" larger than ball diameter and the thickness should also be .005" thicker than the ball diameter. by making the mask thicker you can then just roll or scrape the extra balls off and any d
Electronics Forum | Mon May 02 04:40:57 EDT 2022 | 1_manuel
Hi there, thank you all for the advice. I will look into that! :)
Electronics Forum | Fri Oct 07 04:25:16 EDT 2005 | GS
Thanks everybody for your comments. I am not going to move to stencil waterjet cut. But because recently talk to people who want to move in that way, so that's why I am trying to get infos as much as it possible in order to learn what does it mean a
Electronics Forum | Thu Feb 14 12:44:48 EST 2008 | operator
Don't worry about the paste print. Just omit it from the stencil. Mask over all the SMT components after reflow with water washable WSOL masking. Then run it thru the wave to deposit the solder. Then wash to remove masking. Or you could manually run
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 | Fri Apr 29 18:48:03 EDT 2022 | proceng1
Kapton works great, but note that Kapton is about 2.5 mils thick, so if you are placing it near other apertures, you are essentially adding to the thickness of your stencil. I've also used some Kapton near parts that need a bit more paste, like co
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