Electronics Forum | Wed Jul 03 15:58:16 EDT 2002 | davef
Your thinking is correct. Wave soldering pads that were designed for reflow can create problems: * Large pads used for reflow [too much solder] can create reliability problems. * Bridging [too much solder] creates rework. * Skipping & shadowing from
Electronics Forum | Thu Nov 11 11:38:39 EST 1999 | John Thorup
Try the Professional SMT Component and Land Pattern Book from SMT Plus. Link below. John Thorup
Electronics Forum | Tue Mar 18 12:38:39 EDT 2008 | fsw
Hi! Can anyone tell me what is the min spacing between PCB edge & land pattern to avoid cracking of components due to mechanical stresses caused while depaneling with cookie/pizza cutter. Thnx!
Electronics Forum | Thu Mar 20 16:53:32 EDT 2008 | guhansub
Min spacing will be 0.75'' on all the 4 edges
Electronics Forum | Tue Mar 25 03:28:12 EDT 2008 | lococost
Thanks Steve, that's very clear!
Electronics Forum | Tue Nov 14 23:49:37 EST 2000 | DL
Our land patterns are slightly bigger than the part, we've had no problems. There are your own concerns about the part hanging over the pads, this can be ok or not depending on your application and/or how much part is over. I'm sure this is in the J-
Electronics Forum | Wed Mar 19 09:54:44 EDT 2008 | davef
Here's what we suggest: * Keep a 5-mm space between a board edge and a ceramic capacitor. * Mount the capacitor parallel relative to the edge. * Design pads about a half of the termination. * Fixture the board when using your pizza cutter.
Electronics Forum | Thu Mar 20 10:59:59 EDT 2008 | fsw
Thnx Dave! I have not seen anyone as yet using fixtures to support brds while using Pizza cutters. Will check it out.
Electronics Forum | Fri Mar 21 08:28:35 EDT 2008 | lococost
Boardhouse, would it be possible to attach a picture of such a routed slot together with a V cut? I was always told the 2 don't work together that well because of tolerances.
Electronics Forum | Mon Mar 24 12:11:38 EDT 2008 | scombs
Is this what you are looking for? We do this on quite a few boards and it has eliminated component problems from the Cab depaneler (pizza cutter)
