User Guide

MinimumClearances

Clearance refers to the minimum distances between tracks, pads, SMDs

and vias of different signals, and between SMDs, pads and vias of the

samesignal.

Setting the values for Same signal checks to 0, disables the respective

check.

Distance allows settings to be made for the minimum distances between

objects in layer 20, Dimension, in which the board outline is usually

drawn,andbetweenholes.

Exceptionally, nets that belong to special net classes are drawn here. Val

ues for minimum clearance and hole diameters defined by means of the

CLASScommandapplytothese.

Setting the value for Copper/Dimension to 0 switches off the minimum

clearancecheckbetweencopperanddimension.

In this case polygons don't keep their distance to objects in layer 20,

Dimension!

EAGLE's minimum resolution is 1/10.000 of a millimeter. That is why the

DRC can report only distance and clearance errors which are larger than

1/10.000mm.

Sizes

The minimum values for track width and for hole diameter allowed in

thelayoutareselectedhere.

Restring

The settings made under Restring determine the width of the ring re

maining at pads and vias. The remaining ring refers to the ring of copper

that remains around a hole after a pad or via has been drilled. Different

selections can be made for the width of the remaining ring in the inner

and outer layers. Pads may also differ between the To p and Bottom

layers.

Usually the value is expressed as a percentage of the hole diameter.

Minimumandmaximumvaluescanadditionallybespecified.

As soon as you change a parameter and click on the Apply button you

can directly see the effects in the layout. If you want to use different va

lues for the upper and lower layer (or different shapes, see Shapes tab), it

is recommended to set the layer color for layers 17, Pads, and 18, Vias,

the same as the background color (black or white). In this case you can

recognizetherealsizeandshapeofthepad/viainitsrespectivelayer.

The INFO command shows the via diameter seperately for outer and

innerlayers,andadditionaltheinitiallyuser-definedvalue.

FromSchematictoFinishedBoard