PCB Design Rules

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE designrules SYSTEM "eagle.dtd">
<eagle version="9.7.0">
<designrules name="eurocircuits-proto-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="0.15mm" preferredvalue="0.45mm" check_polywidth="no" name="Trace size for Power"/>
 <rule type="Minimum Copper Width" builtin_ruleid="14" enabled="yes" priority="1" value="0.15mm" preferredvalue="0.3mm" check_polywidth="no" name="minimum-copper-width-1"/>
 <rule type="Minimum Drill Size" enabled="yes" priority="0" onescope="is_via" value="0.25mm" preferredvalue="0.5mm" 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="0.25mm" preferredvalue="0.5mm" 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="0.15mm" preferredvalue="0.3mm" 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="0.15mm" preferredvalue="0.3mm" 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="0.15mm" preferredvalue="0.3mm" 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="0.15mm" preferredvalue="0.15mm" 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="0.15mm" preferredvalue="0.3mm" samesignal="no" name="copper-clearance-5"/>
 <rule type="Copper Clearance" builtin_ruleid="5" enabled="yes" priority="6" onescope="is_via" otherscope="is_via" value="0.15mm" preferredvalue="0.3mm" samesignal="no" name="copper-clearance-6"/>
 <rule type="Copper Clearance" builtin_ruleid="6" enabled="yes" priority="7" onescope="is_smd" otherscope="is_pad" value="0.15mm" preferredvalue="0.3mm" samesignal="yes" name="copper-clearance-7"/>
 <rule type="Copper Clearance" builtin_ruleid="7" enabled="yes" priority="8" onescope="is_smd" otherscope="is_via" value="0.15mm" preferredvalue="0.3mm" samesignal="yes" name="copper-clearance-8"/>
 <rule type="Copper Clearance" builtin_ruleid="8" enabled="yes" priority="9" onescope="is_smd" otherscope="is_smd" value="0.15mm" preferredvalue="0.3mm" samesignal="yes" name="copper-clearance-9"/>
 <rule type="Dimension Clearance" builtin_ruleid="9" enabled="yes" priority="0" value="0.25mm" 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="0.25mm" preferredvalue="0.25mm" 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="0.15mm"/>
<param name="mdWirePad" value="0.15mm"/>
<param name="mdWireVia" value="0.15mm"/>
<param name="mdPadPad" value="0.15mm"/>
<param name="mdPadVia" value="0.15mm"/>
<param name="mdViaVia" value="0.15mm"/>
<param name="mdSmdPad" value="0.15mm"/>
<param name="mdSmdVia" value="0.15mm"/>
<param name="mdSmdSmd" value="0.15mm"/>
<param name="mdCopperDimension" value="0.25mm"/>
<param name="mdDrill" value="0.25mm"/>
<param name="msWidth" value="0.15mm"/>
<param name="msDrill" value="0.25mm"/>
<param name="dpMaxLengthDifference" value="10mm"/>
<param name="dpGapFactor" value="2.5"/>
<description language="en">Eurocircuits 2-layer design rules (proto process)

Min trace width: 0.15 mm (5.91 mil) - all services, pattern class 6
Min spacing: 0.15 mm (5.91 mil) - track to track, pattern class 6; class 5 is 0.175 mm (6.8898 mil), class 7 is 0.125 mm (4.9213 mil)
Min drill: 0.25 mm (9.84 mil)
Min via: 0.25 mm hole / 0.6 mm pad
Annular ring: via 0.125 mm
Copper to board edge: 0.25 mm
Hole to hole: 0.25 mm
Board thickness options: 1.55 mm
Copper weight options: 0.5 oz, 1 oz
Surface finishes: ENIG, LF HAL
Max board size: 580 x 425 mm

Min board 20 x 20 mm. Base copper foil: outer layers 18 µm (0.5 oz), inner layers 35 µm (1 oz). Minimum pad diameter: PTH is finished hole plus 0.350 mm on outer and inner layers, NPTH is finished hole plus 0.250 mm. Tool size equals finished PTH hole size plus 0.10 mm (4 mil), NPTH tool size equals finished size. Drill bits in 0.05 mm increments. Standard PTH hole tolerance plus/minus 0.10 mm (0.20 mm range) for holes 4 mm or less, NPTH plus/minus 0.05 mm. Holes with finished size 0.45 mm or smaller are defined as via holes. Pattern class 5 (all services): track/gap 0.175 mm (6.8898 mil), OAR/IAR 0.150 mm (5.9055 mil), IPI 0.225 mm (8.8583 mil). Legend to board edge: 0.250 mm routing, 0.450 mm scoring. Soldermask design rules LDI: pad to pad 0.135 mm (5.315 mil), track to pad 0.090 mm (3.5433 mil); PI colors: pad to pad 0.330 mm (12.9921 mil), track to pad 0.190 mm (7.4803 mil). Mask overlap clearance MOC: LDI 0.060 mm (2.3622 mil), PI 0.090 mm (3.5433 mil).

Sources:
- https://www.eurocircuits.com/services/pcb-proto/ (read 2026-09-03)
- https://www.eurocircuits.com/technical-guidelines/pcb-design-guidelines/classification/ (read 2026-09-03)
- https://www.eurocircuits.com/content/uploads/2025/04/EC-classification-ENGLISH-5-2024-V3.png (read 2026-09-03)
- https://www.eurocircuits.com/technical-guidelines/pcb-design-guidelines/drilled-holes/ (read 2026-09-03)
- https://www.eurocircuits.com/technical-guidelines/pcb-design-guidelines/soldermask/ (read 2026-09-03)
- https://www.eurocircuits.com/technical-guidelines/pcb-design-guidelines/legend-print/ (read 2026-09-03)
- https://www.eurocircuits.com/technical-guidelines/pcb-design-guidelines/copper-layers/ (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="0.125mm"/>
<param name="rlMaxViaOuter" value="20mil"/>
<param name="rlMinViaInner" value="0.125mm"/>
<param name="rlMaxViaInner" value="20mil"/>
<param name="rlMinMicroViaOuter" value="0.125mm"/>
<param name="rlMaxMicroViaOuter" value="20mil"/>
<param name="rlMinMicroViaInner" value="0.125mm"/>
<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>