Electronics Forum | Wed Feb 26 16:06:34 EST 2003 | slthomas
Something else I just thought of, and MikeK touched on it briefly, is what you'll be cleaning. If you need to be capable of removing both epoxy and solder paste, for instance, you need to look at chemistry and processes that will clean both, and the
Electronics Forum | Thu Mar 06 10:57:28 EST 2003 | Mark
What are the recommended stencil apertures for a TSOP40. Lead pitch 0.48mm & lead width 0.21mm. And direction of squeegee print over the aperture? Recommended Stencil thickness? Recommended aperture reductions? Recommended pcb pad sizes? Recommended
Electronics Forum | Sat Dec 06 23:54:49 EST 2003 | Dean
3000 base model 3010 adds feature 3020 adds features 3030 adds features 3040 adds features 3050...top of the line Sorry I don't have the feature list. It's things like Environmental control unit, under stencil wiper, stencil exchanger, 2d inspe
Electronics Forum | Tue Mar 02 10:24:06 EST 2004 | russ
I have done this before, We print with a 5-6mil stencil and have had no problems with any underneath solder. If you are still nervous instead of removing from stencil use some 3 mil kapton tape or equivelant and tape off the BGA pads. This way the
Electronics Forum | Mon Oct 25 20:15:20 EDT 2004 | pilengr_tw
Davef, Thank you for your reply.You are right that I need to consider the tickness also of the stencil. Previously, I take for granted this process of measuring the tension and I usually let my technician do that. However, I have to determine the pra
Electronics Forum | Fri Nov 19 16:38:15 EST 2004 | grayman
Hi, We only use alcohol for cleaning stencil but it gives us best result even with no clean solder paste. We are using Branson.Furthermore, we have fine pitch components.Try cleaning the tank maybe there are solder accomolation in the tank or try in
Electronics Forum | Wed Feb 09 14:23:41 EST 2005 | russ
First off how thick is your stencil going to be? I have printed .5mm pitch with .009" apertures with a 6 mil stencil. A 5 mil would have been better but the 6 worked just fine. Pitch is not necessarily the deciding factor for paste type. it is the
Electronics Forum | Fri Feb 18 23:21:00 EST 2005 | JSS
Hi Everybody, Mostly customer asked about the solder paste height checking after printing process.Is it compulsory to check the height if we are using stainless steel stencil and metal blades in fully automatic printer.Any technical answer to their
Electronics Forum | Fri Mar 04 10:04:14 EST 2005 | jbrower
We use Alpha UP-78 (Older paste formula) and it works well for what we do. We standardized our stencils at 5mil with a 10% reduction on IC apetures and a home plate design on passive components. Additionally we use laser cut electro-polished stenci
Electronics Forum | Mon Mar 07 11:20:10 EST 2005 | mrduckmann2000
Russ, I tried to get a screen for glue but the design engineer who laid this board out made up his own rules. The 0402 pads are to close for a proper dot size.....per the stencil house. That is why I am going the solder mask route. I would rather
