PCB Data Requirements & Fabrication Instructions

Below you will find the minimum data information requirements to place your rigid circuit board order. The purpose of this web page is to describe the minimum data and information required by Epec to generate the tooling for your printed circuit board.

The minimum required data and information set can be broken down into two categories: "Printed Circuit Board Data" and "Printed Circuit Board Fabrication Instructions".


Printed Circuit Board Data

Circuit Board data can consist of the traditional data package which must include the following:

  • Gerber Data in the following formats:
    • 274D including separate aperture list with all apertures defined.
    • 274X - Preferred
    • Gerber files with aperture lists
    • DXF can be used requires an approval prior to production
    • ODB++ format
  • Drill Data in the following formats:
    • Excellon 1
    • Excellon 2

Also acceptable is ODB++ data. ODB++ will be supplied as a single file, usually with the extension of .tgz. ODB++ contains all the required board and drill information.

Note: Any other data formats need to be reviewed and approved by Epec Engineering before the order can be placed.


Printed Circuit Board Fabrication Instructions:

The fabrication instructions should contain all relevant information required to tool and build the part including:

  • Hole sizes with tolerances, and plating information
  • Board outline detail with all required dimensions and tolerances
  • Hole or feature to edge dimensions
  • Finished Copper Weights
  • Finished Board thickness with tolerances, and measurement criteria
  • Surface finish preference
  • Soldermask requirements
  • Silkscreen requirements
  • Technical contact information
  • Any additional requirements (i.e. impedance, controlled dielectrics, plugged vias, etc.)

The fabrication instructions may be found:

  • Fabrication Drawing:
    • Adobe Acrobat (.pdf)
    • Gerber
    • RS274X
    • HPGL
    • AutoCAD (.dwg or .dxf)
    • Graphic file (.jpg, .gif, .tif, etc.)
    • ODB++
    • Array configurations – tab or scored preference
  • Notes, read me files, and/or customer specification
Celebrating 65 Years of Manufacturing Excellence  Learn More →
America's Oldest. A History of Innovation.

Today at Epec, the customer comes first, and everything we do must be put through that filter. Whether it is developing e-commerce platforms to make it easier to work with us, or creating a NPI (new product introduction) process that helps our customers get to market faster, or the other 10 new projects we have in process, we must focus on building the new. By doing that every day, and by always making the customer our top priority, we plan on being here for another 65 years and then some.

Learn more about our 65 year story →



Celebrating 65 Years - Epec Engineered Technologies