User Guide

Table Of Contents
Example5:LayerSetupforan8-LayerBoard
HintsForWorkingWithBlind,Buried,andMicroVias
VIA command
DependingontheLayersetupviascanhavedifferentlengths.The
parameter toolbar of the VIA command shows all available lengths in
the Layer box. When routing manually (ROUTE command) EAGLE
takes the shortest possible via length in order to change layers. It is also
possiblethatviasatthesamepositionareelongated.
The via length can be changed with the CHANGE VIA command. Se
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lect the value from the according menu and click the via with the left
mousebutton.
Alternativelyusethecommandline:
CHANGEVIA2-7
andaclickontheviachangesthelengthfromlayer2to7.
If the given via length is not defined in the Layer setup it will be elon
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gated to the next possible length or, if this is not possible, an error mes
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sagewillbegenerated.
VIA'GND'1-4(1.052)
places a via that belongs to the signal GND and reaches from layer 1 to
4atposition(1.052).
ROUTECommand
If you want to change the layer while laying-out the board, EAGLE al
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ways takes the shortest possible via (CHANGE LAYER). It is also pos
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siblethataviaatthesamepositioniselongatedautomatically.
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EAGLEManual