PCB Specifications and DRC

Last Updated: June 19, 2019

PCB Specifications offered by MacroFab

These are what MacroFab currently offers for PCB options though the online interface. See this knowledge base article for how to customize your PCB options.

Property	Options Offered
Layers	2, 4, 6, 8, 10, 12, 14, 16
PCB Substrate	FR4, TG175, Lead Free, RoHS Compliant
Thickness	0.062” (1.6mm) standard, 0.008″-0.248″ (0.2mm – 6.3mm) custom
PCB Thickness Increment	0.0004″ (0.1016mm)
Max Dimensions	14.9” x 14.9” (378.46mm x 378.46mm)
Minimum Billable Area	1 square inch (25.4mm²)
Finish	ENIG Finish
Solder Resist	Top and Bottom Standard
Silkscreen	Top and Bottom Standard
Copper Weight	1 ounce (35μm), 2 ounce (70μm)
Silkscreen Color	Red, green, blue, yellow, black, white
Soldermask Color	Red, green, light green, matte green, blue, yellow, black, matte black, white, dark brown, transparent
Plated Slots	Supported
Castellations	Supported
Impedance Control	Supported
Blind and Buried Vias	Not Supported (contact sales)

Design Rules for PCBs

MacroFab has 4 different sets of Design Rule Checks (DRC) for PCBs. Standard, Extended Manufacturing, Extended Drill, and Extended Manufacturing and Drill. Most PCBs fall under our Standard DRC.

DRC for 1oz (35μm) copper PCBs

Property	Standard Manufacturing	Extended Manufacturing	Extended Drill	Extended MFG & Drill
Minimum trace width	5 mil (0.127mm)	3 mil (0.0762mm)	5 mil (0.127mm)	3 mil (0.0762mm)
Minimum spacing	5 mil (0.127mm)	3 mil (0.0762mm)	5 mil (0.127mm)	3 mil (0.0762mm)
Minimum annular ring	4 mil (0.1016mm)	3 mil (0.0762mm)	4 mil (0.1016mm)	3 mil (0.0762mm)
Clearances from edge of board	10 mil (0.254mm)	3 mil (0.0762mm)	10 mil (0.254mm)	3 mil (0.0762mm)
Minimum drill size	10 mil (0.254mm)	10 mil (0.254mm)	4 mil (0.1016mm)	4 mil (0.1016mm)
Minimum paste aperture	12 mil (0.3048mm)	12 mil (0.3048mm)	12 mil (0.3048mm)	12 mil (0.3048mm)
Minimum Silkscreen Size	5 mil (0.127mm)	5 mil (0.127mm)	5 mil (0.127mm)	5 mil (0.127mm)

DRC for 2oz (70μm) copper PCBs

Property	Standard Manufacturing	Extended Manufacturing	Extended Drill	Extended MFG & Drill
Minimum trace width	6 mil (0.1524mm)	N/A	6 mil (0.1524mm)	N/A
Minimum spacing	6 mil (0.1524mm)	N/A	6 mil (0.1524mm)	N/A
Minimum annular ring	6 mil (0.1524mm)	N/A	6 mil (0.1524mm)	N/A
Clearances from edge of board	10 mil (0.254mm)	N/A	10 mil (0.254mm)	N/A
Minimum drill size	10 mil (0.254mm)	N/A	4 mil (0.1016mm)	N/A
Minimum paste aperture	12 mil (0.3048mm)	N/A	12 mil (0.3048mm)	N/A
Minimum Silkscreen Size	5 mil (0.127mm)	N/A	5 mil (0.127mm)	N/A

For PCBs with 2oz (35μm) copper the minimal trace width, spacing, and annular ring need to be larger to account for the thicker plating of copper. Because of this, 2oz Copper also disables the extended manufacturing option.

Finished Drill Sizing

The MacroFab platform interprets drill as the finished size. This is the final diameter after plating and the surface finish applied. No plating tolerance is required in specifying drill sizes.

PCB Layer Stack Ups

MacroFab has a standard set of PCB layer stack ups. For more information on PCB layer stack ups check out the knowledge base article PCB Layer Stack Ups. If a custom stack up is required for your project, contact us!

MacroFab PCB stack up datasheet

PCB and Material Datasheets

Below you can find the datasheets for the materials that are used to create your PCB.

PCB Manufacturing Standards
FR4 datasheet
R-500 GHB Soldermask Datasheet

Assembly Capabilities

MacroFab’s assembly capabilities can be found in this knowledge base article.

Additional Questions?

Are support and engineering staff is here to help! If you have any questions about your PCB design and what set of DRC to use, contact our support team! Does your PCB assembly need different specifications, material, or stack up other then the defaults options? Contact our sales team!