Heavy Copper Guidelines

Take a look at our heavy copper capabilities and guidelines to ensure we can build your project – no matter how complex.

Overall Guidelines

  • Maximum Number of Layers = 20
  • Laminate = FR4 and Rogers Hybrid
  • Finished Thickness = .020″ – .450″
  • Green, Blue, Red, Black, & White Solder Masks
  • Minimum Soldermask Clearance = 6 mils
  • Minimum Solder Dam Width = 5.5 mils
  • Supported Finished = Hot Air Solder Leveling (HASL), Immersion Gold (ENIG), Immersion Silver and White Tin.
Minimum (inches) 1oz 2oz 4oz 6oz 8oz 10oz 12oz

Conductor Width

.005 .005 .006 .007 .008 .009 .010

Conductor Spacing

.005 .006 .008 .012 .014 .017 .020
Pad-Pad Spacing .005 .006 .008 .012 .014 .017 .020
Conductor-Pad Spacing .005 .006 .008 .012 .014 .017 .020
PTH Annular Ring .006 .006 .008 .009 .011 .013 .014
VIA Annular Ring .006 .006 .008 .009 .011 .013 .014
Distance Hole-Board Edge .010 .010 .010 .010 .010 .010 .010

Need some more guidance? Send an email to sales@royalflexcircuits.com and we can put you in touch with an engineer who can answer any questions you may have!