Basic Specifications

SpecStandard SpecCustom Spec
Layer Count1-6 Layers1-40+ Layers
Turn Time2+ DaysSame Day - 4 Weeks+
Order Quantity1-20 PCBs1-10000+ PCBs
MaterialsFR-4See "Primary Laminate Materials" Section Below
Plate FinishHASL, HASL-LF, Electroless Nickel Immersion Gold (ENIG)Organic Solderability Preservative (OSP), Immersion Silver, Immersion (White) Tin, Electrolytic Nickel/Gold (Hard & Soft Au Wire Bondable), Electroless Nickel Electroless Palladium Immersion Gold (ENEPIG)
CertificationsIPC Class 2 - A600IPC Class 3 , AS9100:2016 (RevD)
Board Thickness0.062"Full Range Available
Copper Weight1 oz. Inner / Up to 1oz. Outer0.25 - 6 oz. Inner / 0.25-20 oz. Outer
Minimum Trace/Space5/5 mils3/3 mils
Solder Mask (LPI)GreenGreen, Black, Blue, Yellow, White, Purple, Clear, Red, Custom
LegendWhiteWhite, Black, Yellow, Red, Blue
Minimum Hole Size0.010"0.003"
Hole Tolerance"+/- 0.003"Less than +/- 0.003" (upon request)
Rout Tolerance"+/- 0.005"Less than +/- 0.005" (upon request)
UL Markings/DatesYesYes
Plated HolesPlated/Non-PlatedPlated/Non-Plated
Castellated HolesXYes
Controlled DielectricXYes
Controlled ImpedanceXYes
Counter SinksXYes
Counter BoresXYes
Blind/Buried ViasXYes
Mask Plugged ViasXYes
Via-in-Pad (Via Fill)XYes
Etch BackXYes
Tetra EtchXYes
Cover CoatXYes
Cavity ProcessXYes
Laser RoutXYes
LPI LegendXYes
Edge MillXYes
Unique SterilizationXYes
Back DrillingXYes
Controlled Depth DrillXYes

Copper Trace Width/Spacing Design Guideline

Copper Weight (oz)Min Trace / Space (mils)
0.25 oz3 / 3 mils
0.5 oz4 / 4 mils
1 oz4 / 5 mils
2 oz5 / 7 mils
3 oz6 / 9 mils
4 oz7 / 11 mils
5 oz8 / 13 mils
6 oz9 / 15 mils

Additional Spec

Maximum Board Size:16" x 22"
Layer Count:1-40+
Materials:FR-4, Rogers, Arlon, Polymide, Aluminum (+more in "Primary Laminate Materials below)
Absolute Minimum Trace Width/ Spacing:2 / 2 mils
SMT Pitch:<0.015"
Legend Text Size:0.004" wide, 0.015" tall
Minimum Core Thickness:0.002"
Minimum Foil Thickness:0.00025"
Board Thickness:0.005"-0.250"
Board Thickness Tolerance:+/-10%
Copper Weight:Outer layers: 0.25 - 10 oz
Inner layers: 0.25 - 6 oz
Solder Mask Colors:Green, Black, Blue, Yellow, White, Purple, Clear, Red, Custom
Silkscreen Colors:White, Black, Yellow, Red, Blue
Surface Finishes:HASL, HASL Lead-Free, ENIG, ENEPIG, Hard Gold, Wire Bondable Gold, Selective Gold, Immersion Silver, OSP
Minimum Solder Mask
Dam Size:


Minimum Mechanical Drill Size:0.006"
Minimum Laser Drill Size:0.003"
Finished Hole Size Tolerance:+/-0.002"
Minimum Router Bit Width:0.020"
Via Types:Blind, Buried, Via-in-Pad, Filled (Conductive and Non-conductive)
Minimum Via Annular Ring:0.002"
Maximum Via Aspect Ratio:20/1


Minimum Board-Edge to Copper for Scoring:0.010"
Minimum Board-Edge to Copper for Routing:0.004"
Routing Tolerance:+/-0.003"
Features:Counter Sink, Counter Bore, Controlled Depth


Deliverables:Cross-Section, Solder Sample, Certificate of Compliance
Add-ons:TDR, Ionic Contamination
Certifications:ISO 9001 - 2008, ITAR

Design Help

Have some questions about your PCB design? Don't have time to put the files together? Or maybe you just need to review basic design rules? We can help. 

From complex HDI and high-layer count boards to single-sided PCBs, Royal Circuits offers complete PCB design services. Read more > 

Primary Laminate Materials

Royal Circuits stores an extensive variety of laminates including exotic materials to meet our customer’s quick turn needs. While this is a significant upfront investment, we believe it's necessary to give our customers the level of service they deserve. 

For additional information on laminates including a free whitepaper and a recent webinar on PCB laminates, click here > 


Prototype and Production PCBs

Prototype and Production PCBs

Royal Circuits specializes in PCB prototyping. We fabricate small-quantity prototype PCBs with the same state-of-the-art equipment and processes used to manufacture the production PCBs of our Fortune 500 customers. 

HDI Circuit Boards

HDI Circuit Boards

High-density circuit boards (HDI) are being used more and more, especially in consumer electronic products. HDI technology provides more space on PCBs to place smaller components closer together. Learn more about HDI designs >

Flex and Rigid-Flex PCBs

Flex and Rigid-Flex PCBs

Not only do we offer flexible PCBs for fast production, we also provide flex PCB prototypes. Our flex and rigid-flex capabilities are designed to meet a variety of circuit board needs. Learn more about flex >.

State-of-the-Art Equipment

Using the latest technology and cutting-edge equipment, we are building the Factory of the Future with the capability to manufacture any kind of circuit board – from simple to complex - fast.

Our facility is constantly evolving to meet the changes needs of engineers today and in the future. 

To support this vision, we've invested in the most advanced technology and expertise to build any board - right the first time and ultra-fast. 

Read about our installed equipment >