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Artwork Design Rules

DesignExternal Layers
(1/2 oz. copper clad, .062 finished thickness)
Minimum
Feature Size
PreferredFeature Size
Trace Width .003 .005
Trace to Trace Spacing .003 .005
Trace to Pad Spacing .003 .005
Trace to Plane Spacing .003 .008
Trace to Unplated Hole .010 .014
Trace to NC Routed Edge .010 .020
Trace to Punched Edge .062 .062
Trace to Scored Edge .012 .020
Trace to Misc Metal Features (Logo, UL Marking, etc.) .004 .020
Pad to Pad Spacing .003 .005
Pad Size = FHS + (x.xxx) .008 .015
Via Pad Size = FHS +(x.xxx) .006 .015
Via Pad to Via Pad Spacing. Tented .003 .005
Via Pad to Via Pad Spacing. No tent with S/M lay down. .010 .012
Pad to Plane Spacing .005 .008
Pad to NC Routed Edge .012 .020
Pad to Punched Edge .062 .062
Pad to Scored Edge .012 .020
Unplated Hole Edge to Board Edge .015 .050
Unplated Hole Edge to Unplated Hole Edge. </= .070 FHS .010 .016
Unplated Hole Edge to Unplated Hole Edge. >/= .070 FHS .010 .016

Internal Layers (Signals) (1 oz. copper clad, .062 finished thickness)
Trace Width .003 .005
Trace to Trace Spacing .003 .005
Trace to Pad Spacing .003 .005
Trace to Plane Spacing .005 .006
Trace to Unplated Hole .010 .012
Trace to Routed Edge .020 .024
Trace to Punched Edge .062 .062
Trace to Scored Edge .020 .024
Trace to Misc Metal Features (Scales, Fiducials, etc.) .004 .020
Pad to Pad Spacing .004 .006
Pad Size = FHS + (x.xxx) .010 .015
Via Pad Size = FHS +(x.xxx) .010 .015
Via Pad to Via Pad Spacing .003 .005
Pad to Plane Spacing .005 .008
Pad to Routed Edge .020 .024
Pad to Punched Edge .062 .062
Pad to Scored Edge .020 .024

Internal Layers (Planes) (1 oz. copper clad, .062 finished thickness)
Plane Clearance = FHS + (x.xxx) .020 .025
Pad Size = FHS + (x.xxx) .010 .015
Plane to NC Routed Board Edge .020 .030
Plane to Scored Edge .020 .030
Connection Annular Ring = Drill + (x.xxx) .005 .006

Solder Mask Clearance
Liquid Photo Imagable
Pad Size = External Pad + (x.xxx) .003 .005
Pad Size = Unplated Hole + (x.xxx) .005 .020
Min. Width (Webbing) .003 .005
Positional Tolerance no s/m on pad </= 20% on pad

Legend
Minimum Height .040 .060
Minimum Stroke Width .005 .006
Legend to Solder Mask Clearance Edge .005 .010
Legend to Board Edge .010 .020

Preferred Practices
Hole per Square Inch 100 Maximum
Number of Drill Size none none
Via Pad Tear Dropping on all Signal Connections no via pads
Breakaway Slot Width .031 .062
Breakaway Slot Web Width .020 .040
Smallest Internal Radius .016 .031
Etched SMT Pad Tolerance +/- .0010 +/- .0020
Nonfunctional pads on Internal Signals remove remove

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