User Guide

NotesontheParameters
Most parameters are explained with the help of a graphical display. As
soon as you click with the mouse on a parameter line, the associated dis
-
playappears.
Layers
Define the number of signal layers and the kind of vias (blind or buried
vias) here. With the help of a mathematic expression in the Setup line the
proper structure of the board  the appropriate combination of cores
andprepregsandtheresultingfacilitiesforvias  canbedefined.
DesignRules: Layer Setup
In most cases (for simple two or more layer boards) the vias are drilled
through all layers. The image above shows the default setup for a two
layer board. The expression (1*16) defines one core with layers 1 and
16, which can be connected with vias. Parenthesis around the expression
definethrough-hole(continuous)vias.
Basicexamples:
1layer:
16 Onlylayer16,novias.
4layers,viasthroughalllayers:
(1*2+15*16) Twocoresareaffiliatedwitheachother.
6layers,viasthroughalllayers:
(1*2+3*14+15*16) Threecoresareaffiliatedwitheachother.
The fields for Copper and Isolation are used to define the thickness of
copper and isolation layers. These settings are only relevant for complex
multilayerboardsthatuseblindormicrovias.
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EAGLEManual