User Guide

DesignRuleCheck(DRC):
EAGLE can identify the violation of certain Design Rules (e.g. if two
differenttracksoverlaporaretooclose)withtheDRC.
Device:
Afullydefinedelementinalibrary.Consistsofapackageandasymbol.
DeviceSet:
Consists of devices that use the same symbols for the schematic but
havedifferentpackagevariantsortechnologoies.
Drill:
Plated-throughdrillinginthelayout(inpadsandvias)
ElectricalRuleCheck(ERC):
EAGLE can identify the violation of certain electrical rules (e.g. if two
outputs are connected) with the ERC. It also checks the consistency of
theschematicandthelayout.
Forward&BackAnnotation:
Transforms all the actions one makes in a schematic online into the lay
-
out (and with limitations from layout into schematic). Both files are
consistentallthetime.
Gate:
The term gate is used in this manual for a part of a component which can
be individually placed on a schematic. This can be one gate of a TTL
component, one contact pair in a relay, or an individual resistor from a
resistorarray.
Hole:
Nonplated-throughdrillinginthelayout(e.g.amountinghole).
LayerStack:
Current number and order of copper and isolation layers which are used
tobuildupaprintedcircuitboard.
MicroVia:
A plated-through hole (like blind via) with a relatively small drill diame
-
terwhichconnectsanouterlayerwiththenextreachableinnerlayer.
Net:
Electricalconnectioninaschematic.
Package:
Componentfootprintstoredinalibrary.
Pad:
Through-holepadassociatedwithapackage.
Pin:
Connectionpointonaschematicsymbol.
Prepreg:
Usedinacompoundofinnerandouterlayersformultilayerboards.
13
Introduction