Electronics Forum | Fri Mar 29 10:51:20 EST 2002 | lsmith
The IPC-EM-782 reads as follows: the adjustment factor is usually intended to increase the Z dimension slightly, but brings the Z maximum up to an even equivalent. Example if Zmax is 2.100mm then you would enter an adjustment factor of .100mm. The ad
Electronics Forum | Thu Mar 21 15:36:19 EST 2002 | slthomas
We're having trouble with a TO-252 DPAK from Fairchild (MC7805CDT) and our existing land pattern. The land pattern calculator on the IPC site doesn't have anything available that matches it (there are no TO-252's available on the pull downs), and I'
Electronics Forum | Wed May 12 02:22:03 EDT 1999 | Richard Durrant
| Need a footpint for a 10 lead uSOIC (RM-10) | Have you tried the IPC website at www.ipc.com, they have an online land pattern calculator that not only gives you there RLP (Regisistered Land Patterns) for standard components, but also allows you to
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 Mar 22 10:55:11 EST 2002 | slthomas
Dave, you are THE master of the search. I made the lame assumption that if they'd had layout specs. for a part, it would be part of the spec. Bad assumption. The layout for the decal from that page you linked to is exactly what I needed. I look
Electronics Forum | Thu Mar 21 21:21:37 EST 2002 | davef
In the beginning, there was TO-5. And it was good. Flushed with success, they created TO-220. It too was good. Then came SMT. It was better than some things, but then again ... In these early days, there was a haze on the horizon that blocked t
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!
