Prohibition Area

4RESTER wrote on Mon, 13 June 2011 15:45

It's possible to make into the EAGLE the Prohibition Areas for the

footprint of the component?

Yes, there are a few different layers that can be used for that.

Right from manual (in "doc" folder on install directory) in section called

Define Forbidden Areas

Areas in the form of rectangles, polygons or circles in layers 41,

tRestrict, and 42, bRestrict, are forbidden for the Autorouter/Followme

router. No copper objects may be drawn in the top or bottom layers inside

these areas. These regions are tested by the Design Rule Check and taken

into consideration by the Autorouter/Followme router.

Layer 43, vRestrict, is for drawing restricted areas where the Autorouter

or the Followme router may not set vias. Manually placed vias in such a

vRestrict region are not examined by the DRC and therefore not reported as

an error.

Note that vias in vRestrict area will not create DRC error (which is a

problem CadSoft, that should be fixed IMHO).  Why have a restrict area if

you don't report violations?

But these just restricts copper traces and vias.  You can get component

restricts as well.  Again, straight from manual section labelled Restricted

area for components

In layer 39, tKeepout, you should create a restricted area over the whole

component (RECT command). This allows the DRC to check whether components

on your board are too close or even overlapping.

Note that tKeepout becomes bKeepout automatically when a component is

mirrored in the layout.

No allowance for internal layer restrict areas as of yet.  It's been

requested many times and perhaps EAGLE 6 will make that available.

Cheers,

James.

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James Morrison  ~~~  Stratford Digital

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Thanks a lot for your detailed comprehensive answer!

Thanks a lot for your detailed comprehensive answer!