Electronics Forum | Wed Jul 03 14:08:10 EDT 2002 | gbriceno
I' designing a PCB with SMD components to optimize the land patterns for wave soldering. I find that the IPC-SM-782 land patterns are not robust enough for wave soldering, yielding ramdom skips and bridges. This PCB will also give me insight on sha
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 | Fri Sep 15 15:46:54 EDT 2017 | tey422
I have a customer want to add an SMD coil to the board, which they used to hand soldering all the time. I want to know is there footprint/land pattern size that I should follow? Any recommendation?
Electronics Forum | Mon Sep 18 01:47:18 EDT 2017 | bukas
I would go with wire thickness + 0.4 to 0.8 mm for pad width, and pre-tinned lenght + 0.5mm what seems to me like problem is that it can easily roll off the pads in reflow oven
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 | 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.
