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FAQ // Military and Aerospace PCBs

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Sierra Circuits is proud to serve those who serve. That’s why every mil-spec PCB we manufacture receives priority scheduling for fast-track production. Learn more about our experience designing PCBs for the military and aerospace industry.
PCB Certifications

What industry certifications does Sierra Circuits have to manufacture mil-spec PCBs?

Sierra Circuits has the following industry certifications:

  • ISO 9001:2015 Certificate
  • ISO 13485:2016 Certificate
  • AS9100
  • UL Certified
  • IPC-A-600 Inspectors
  • Defense Logistics Agency (DLA) Approval Letter
  • IPC Manufacturers Qualification Profile (MQP) for Sierra Circuits, Sunnyvale, California
  • ITAR Registration Letter
  • Minority Business Certification
  • MIL-PRF-31032 Certificate
  • Mil-PRF-55110 Certificate for GF Materials
  • Mil-PRF-55110 Certificate for GI Materials
  • RoHS / REACH Compliance Material Composition Declaration
  • Conflict Minerals Reporting Template

For more information about our certifications, click here.

Documentation

What documentation is provided with each mil-spec PCB?

We provide all the military-grade documents. The following is the list of documents that we will provide for your mil-spec board:

  • Certificate of conformance
  • IPC J-STD-001E
  • Material specifications
  • Record of calibrated tools used during manufacturing
  • Reflow profile copy (included with first article)
  • AOI report or visual inspection report
  • Photo requirements
  • Flying probe or in-circuit testing report
  • First article inspection report
  • Ionic cleanliness test report
Dielectric

What is the minimum dielectric between two planes?

The minimum dielectric between two planes is 3 mils.

PCB dielectric thickness

Annular Rings

What is the minimum annular ring on finished boards?

The minimum annular ring on finished boards is 2 mils.

What are the annular rings for inner and outer layers in the working Gerbers?

In your Gerber files, you should have a minimum annular ring of 6 mils for inner layers and 7 mils for outer layers.

Hole Size

What is the minimum plating inside the hole (PTH)?

The minimum plating inside the hole is 1 mil.

Talk to a Sierra Circuits PCB Expert today

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Call us: +1 (800) 763-7503
Email us: through our Customer Care form