Land Patterns and Component Spacing

One of the biggest causes of challenges with assembly these days seems to be component spacing, as I wrote about here.

We reference IPC spacing guidelines from time to time. Like, we'll say: "use IPC spacing guidelines" and stuff. That's all fine and good - unless you don't know where to go to find the IPC component spacing guidelines.

IPC-7351 is one of the things you're looking for. The IPC even has a handy dandy piece of software that you can download here at ipc.org or here and PCB Matrix.

I'm not sure how current their libraries are and if they have super new things like I covered in this post or this one, but I'm sure you can use similar parts to get pretty close to good spacing.

If you can't figure it out from there, a 20 mil courtyard is generally a pretty good rule of thumb.

Duane Benson
The best way to find something is to actually look for it.

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[note]

more information http://printed-circuit-board-assembly.blogspot.com/