Electronics Forum | Tue Mar 02 10:19:41 EST 2004 | loz
Hi all, we have recently seen a design that consists off a QFP100, pitch at 25". Also in the centre of this footprint is a FBGA165 footprint, pad size .4mm @ 1mm pitch. We have been informed that we will fit the QFP. I want to remove the BGA pads fr
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 | Thu Mar 04 20:15:51 EST 2004 | davef
Print paste in the holes you don't plan to use and let it dry. That way you don't affect your paste volume in other apertures. The bad news: When you don't want paste to dry and close your apertures, it will do it. When you want paste to dry and
Electronics Forum | Sat Jun 12 16:24:02 EDT 1999 | JohnW
Is there public domain information available on standard surface mount package outlines and footprints? Thanks, WillyW Willy, The IPC has a great listing for the std packages and footprints, as do most component manufacturers. I'd start on
Electronics Forum | Tue Apr 15 16:07:18 EDT 2014 | rway
Rather than using an over-lay of both pads, I would just stay with a rectangle pad shape, a little wider to accommodate both footprints. Keep it simple.
Electronics Forum | Tue Apr 15 14:19:19 EDT 2014 | horchak
This does not look difficult. It appears the rectangle of proper size and spacing would work for both, or even a square pad. Don't make it more difficult than it should be. But then I could be missing something?
Electronics Forum | Mon Apr 14 17:38:18 EDT 2014 | bradlevy
I've got a small smt board I've already got working prototypes of, which uses a tactile switch. I've got another much less expensive tact switch of similar size that I had avoided due to a difference in actuators I originally had no way around. Now I
Electronics Forum | Tue Apr 15 15:12:50 EDT 2014 | bradlevy
Thanks Bob. I just didn't have enough experience with production SMT (vs hand-soldered prototypes) to know how finicky some things like this are. I've tried to do a lot of reading, but I haven't seen much that talks about things like this. I also hav