PCB Design Rules

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE designrules SYSTEM "eagle.dtd">
<eagle version="9.7.0">
<designrules name="elecrow-2L.edru">
<classes>
<class number="0" name="default">
</class>
<class number="1" name="pwr">
</class>
</classes>
<rules>
<rulecategory type="Copper Clearance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Keepout Clearance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Solder-Mask Clearance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Dimension Clearance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Drill Distance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Restrict Clearance" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Minimum Drill Size" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Minimum Copper Width" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Acute Angle" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Air-Wire" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Small Gap" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Wire Stub" manualdrc="yes" livedrc="no"/>
 <rulecategory type="Matched Lengths" manualdrc="yes" livedrc="yes"/>
 <rulecategory type="Via Restrict Clearance" manualdrc="yes" livedrc="yes"/>
 <rule type="Minimum Copper Width" enabled="yes" priority="0" onescope="classes=1" value="0.1524mm" preferredvalue="0.4572mm" check_polywidth="no" name="Trace size for Power"/>
 <rule type="Minimum Copper Width" builtin_ruleid="14" enabled="yes" priority="1" value="0.1524mm" preferredvalue="0.3048mm" check_polywidth="no" name="minimum-copper-width-1"/>
 <rule type="Minimum Drill Size" enabled="yes" priority="0" onescope="is_via" value="0.3mm" preferredvalue="0.6mm" name="Min Via hole size on 2-layer"/>
 <rule type="Minimum Drill Size" enabled="no" priority="1" onescope="all" value="0.5mm" preferredvalue="0.5mm" name="Min Non-plated holes"/>
 <rule type="Minimum Drill Size" builtin_ruleid="15" enabled="yes" priority="2" value="0.3mm" preferredvalue="0.6mm" name="minimum-drill-size-1"/>
 <rule type="Acute Angle" builtin_ruleid="16" enabled="no" priority="0" name="acute-angle-1"/>
 <rule type="Wire Stub" builtin_ruleid="17" enabled="yes" priority="0" name="wire-stub-1"/>
 <rule type="Air-Wire" builtin_ruleid="19" enabled="yes" priority="0" name="air-wire-1"/>
 <rule type="Matched Lengths" builtin_ruleid="20" enabled="yes" priority="0" tolerance="10mm" gapfactor="2.5" name="matched-lengths-1"/>
 <rule type="Copper Clearance" enabled="no" priority="0" onescope="all" otherscope="all" value="0.25mm" preferredvalue="0.25mm" samesignal="yes" bothscope="all" name="Same-net track spacing"/>
 <rule type="Copper Clearance" builtin_ruleid="0" enabled="yes" priority="1" onescope="is_wire_polygon" otherscope="is_wire_polygon" value="0.1524mm" preferredvalue="0.3048mm" samesignal="no" name="copper-clearance-1"/>
 <rule type="Copper Clearance" builtin_ruleid="1" enabled="yes" priority="2" onescope="is_wire_polygon" otherscope="is_pad_smd" value="0.1524mm" preferredvalue="0.3048mm" samesignal="no" name="copper-clearance-2"/>
 <rule type="Copper Clearance" builtin_ruleid="2" enabled="yes" priority="3" onescope="is_wire_polygon" otherscope="is_via" value="0.1524mm" preferredvalue="0.3048mm" samesignal="no" name="copper-clearance-3"/>
 <rule type="Copper Clearance" builtin_ruleid="3" enabled="yes" priority="4" onescope="is_pad_smd" otherscope="is_pad_smd" value="0.1524mm" preferredvalue="0.1524mm" samesignal="no" name="copper-clearance-4"/>
 <rule type="Copper Clearance" builtin_ruleid="4" enabled="yes" priority="5" onescope="is_pad_smd" otherscope="is_via" value="0.1524mm" preferredvalue="0.3048mm" samesignal="no" name="copper-clearance-5"/>
 <rule type="Copper Clearance" builtin_ruleid="5" enabled="yes" priority="6" onescope="is_via" otherscope="is_via" value="0.1524mm" preferredvalue="0.3048mm" samesignal="no" name="copper-clearance-6"/>
 <rule type="Copper Clearance" builtin_ruleid="6" enabled="yes" priority="7" onescope="is_smd" otherscope="is_pad" value="0.1524mm" preferredvalue="0.3048mm" samesignal="yes" name="copper-clearance-7"/>
 <rule type="Copper Clearance" builtin_ruleid="7" enabled="yes" priority="8" onescope="is_smd" otherscope="is_via" value="0.1524mm" preferredvalue="0.3048mm" samesignal="yes" name="copper-clearance-8"/>
 <rule type="Copper Clearance" builtin_ruleid="8" enabled="yes" priority="9" onescope="is_smd" otherscope="is_smd" value="0.1524mm" preferredvalue="0.3048mm" samesignal="yes" name="copper-clearance-9"/>
 <rule type="Dimension Clearance" builtin_ruleid="9" enabled="yes" priority="0" value="0.2mm" preferredvalue="0.4mm" name="dimension-clearance-1"/>
 <rule type="Via Restrict Clearance" builtin_ruleid="21" enabled="yes" priority="0" value="0mil" preferredvalue="0mil" name="via-restrict-clearance-1"/>
 <rule type="Restrict Clearance" builtin_ruleid="10" enabled="yes" priority="0" value="0mil" preferredvalue="0mil" name="restrict-clearance-1"/>
 <rule type="Small Gap" builtin_ruleid="18" enabled="yes" priority="0" name="small-gap-1"/>
 <rule type="Solder-Mask Clearance" builtin_ruleid="11" enabled="no" priority="0" value="0mil" preferredvalue="0mil" check_name="yes" check_value="no" name="solder-mask-clearance-1"/>
 <rule type="Drill Distance" builtin_ruleid="12" enabled="yes" priority="0" value="0.2mm" preferredvalue="0.2mm" name="drill-distance-1"/>
 <rule type="Keepout Clearance" builtin_ruleid="13" enabled="yes" priority="0" value="0mil" preferredvalue="0mil" name="keepout-clearance-1"/>
 </rules>
<param name="mdWireWire" value="0.1524mm"/>
<param name="mdWirePad" value="0.1524mm"/>
<param name="mdWireVia" value="0.1524mm"/>
<param name="mdPadPad" value="0.1524mm"/>
<param name="mdPadVia" value="0.1524mm"/>
<param name="mdViaVia" value="0.1524mm"/>
<param name="mdSmdPad" value="0.1524mm"/>
<param name="mdSmdVia" value="0.1524mm"/>
<param name="mdSmdSmd" value="0.1524mm"/>
<param name="mdCopperDimension" value="0.2mm"/>
<param name="mdDrill" value="0.2mm"/>
<param name="msWidth" value="0.1524mm"/>
<param name="msDrill" value="0.3mm"/>
<param name="dpMaxLengthDifference" value="10mm"/>
<param name="dpGapFactor" value="2.5"/>
<description language="en">Elecrow 2-layer design rules (standard process)

Min trace width: 0.1524 mm (6.0 mil) - minimum, recommend greater than 8 mil
Min spacing: 0.1524 mm (6.0 mil) - trace to trace, minimum, recommend greater than 8 mil; pad to pad minimum is 8 mil (0.2032 mm)
Min drill: 0.3 mm (11.81 mil)
Min via: 0.3 mm hole
Board thickness options: 0.6 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.6 mm, 2.0 mm
Copper weight options: 1 oz, 2 oz
Surface finishes: HASL, HASL Lead Free, ENIG
Max board size: 550 x 550 mm

Specs apply to regular custom PCB online ordering service, 1 to 8 layers share these limits. Maximum size 55cm x 55cm, minimum board dimension 10mm. Inner layer copper 17um (0.5 oz) or 35um (1 oz). Order form also offers OSP finish, 2.5mm thickness, and min castellated hole 0.60mm. Drill tolerance plated 0.1mm, non-plated 0.05mm. Outline tolerance plus or minus 0.20mm. Min silkscreen text height 0.8mm.

Sources:
- https://www.elecrow.com/pcb-manufacturing.html (read 2026-09-03)
</description>
<param name="layerSetup" value="(1*16)"/>
<param name="mtCopper" value="0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm 0.035mm"/>
<param name="mtIsolate" value="1.6mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm 0.15mm 0.2mm"/>
<param name="mdViaViaSameLayer" value="6mil"/>
<param name="mnLayersViaInSmd" value="2"/>
<param name="mdSmdStop" value="0mil"/>
<param name="msMicroVia" value="0.3mm"/>
<param name="msBlindViaRatio" value="0.5"/>
<param name="rvPadTop" value="0"/>
<param name="rvPadInner" value="0"/>
<param name="rvPadBottom" value="0"/>
<param name="rvViaOuter" value="0"/>
<param name="rvViaInner" value="0"/>
<param name="rvMicroViaOuter" value="0"/>
<param name="rvMicroViaInner" value="0"/>
<param name="rlMinPadTop" value="0.18mm"/>
<param name="rlMaxPadTop" value="80mil"/>
<param name="rlMinPadInner" value="0.18mm"/>
<param name="rlMaxPadInner" value="20mil"/>
<param name="rlMinPadBottom" value="0.18mm"/>
<param name="rlMaxPadBottom" value="80mil"/>
<param name="rlMinViaOuter" value="0.1mm"/>
<param name="rlMaxViaOuter" value="20mil"/>
<param name="rlMinViaInner" value="0.1mm"/>
<param name="rlMaxViaInner" value="20mil"/>
<param name="rlMinMicroViaOuter" value="0.1mm"/>
<param name="rlMaxMicroViaOuter" value="20mil"/>
<param name="rlMinMicroViaInner" value="0.1mm"/>
<param name="rlMaxMicroViaInner" value="20mil"/>
<param name="psTop" value="-1"/>
<param name="psBottom" value="-1"/>
<param name="psFirst" value="-1"/>
<param name="psElongationLong" value="100"/>
<param name="psElongationOffset" value="100"/>
<param name="mvStopFrame" value="0"/>
<param name="mvCreamFrame" value="0"/>
<param name="mlMinStopFrame" value="0.038mm"/>
<param name="mlMaxStopFrame" value="4mil"/>
<param name="mlMinCreamFrame" value="0mil"/>
<param name="mlMaxCreamFrame" value="0mil"/>
<param name="mlViaStopLimit" value="0.5mm"/>
<param name="srRoundness" value="0"/>
<param name="srMinRoundness" value="0mil"/>
<param name="srMaxRoundness" value="0mil"/>
<param name="slThermalIsolate" value="10mil"/>
<param name="slThermalsForVias" value="0"/>
<param name="checkAngle" value="0"/>
<param name="checkRestrict" value="1"/>
<param name="checkStop" value="0"/>
<param name="checkValues" value="0"/>
<param name="checkNames" value="1"/>
<param name="checkWireStubs" value="1"/>
<param name="checkPolygonWidth" value="0"/>
<param name="useDiameter" value="13"/>
<param name="removeAnnularRing" value="0"/>
<param name="maxErrors" value="50"/>
 </designrules>
</eagle>