Sierra Circuits Leading Mil-Spec PCB Manufacturing for Aerospace and Defense

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Sierra Circuits, a seasoned mil-spec PCB manufacturer, excels in producing and assembling high-reliability IPC 6012 class 3/ES PCBs for aerospace and defense applications. The commitment to supporting those who serve our nation is evident in the priority scheduling system, ensuring fast-track production for every mil-spec board manufactured.

 Fast Turnaround Times for Various PCB Configurations

• Next Day: Standard FR-4 or double-sided PCBs
• 2–4 Days: 4-layer to 8-layer PCBs
• 5 Days: 10-layer PCBs and above
• 5–10 Days: HDI, rigid-flex, flex, and metal core PCBs

High-reliability and fast turnaround times for your defense and space board

The efficient production pipeline allows for next-day delivery of standard FR-4 or double-sided PCBs, providing a swift turnaround to meet urgent project requirements. For 4-layer to 8-layer PCBs, a turnaround time of 2–4 days is maintained, combining speed with precision to accommodate the complexity of these designs. Higher-layer configurations, such as 10-layer PCBs and above, are completed within a prompt 5-day turnaround, ensuring projects remain on schedule. Advanced technologies like HDI, rigid-flex, flex, and metal core PCBs are delivered within 5–10 days, meeting the stringent requirements of aerospace and defense applications.

The focus at Sierra Circuits is not only on manufacturing high-quality mil-spec PCBs but also on providing expedited services that align with the critical timelines of aerospace and defense projects. With reliable and swift production capabilities, Sierra Circuits stands as a trusted partner for those who require precision, reliability, and efficiency in every mil-spec PCB delivered.

Commitment to IPC-2581 Standard
Sierra Circuits supports IPC-2581, a crucial standard for the seamless exchange of design data. This open, vendor-neutral XML format facilitates clear communication regarding layer stack-up, drill details, and other critical specifications. Adhering to IPC-2581 minimizes the likelihood of errors, promotes improved collaboration, and streamlines workflows, significantly contributing to the efficient and accurate production of PCBs with enhanced precision and reliability.

Full Intellectual Property Protection and Comprehensive Documentation

Sierra Circuits provides full intellectual property protection for all mil-spec boards, ensuring they are ITAR certified. Extensive documentation is offered to support projects, including:

• Certificate of Conformance
• Material Specifications
• Reflow Profile Copy (included with first article)
• Photo Requirements
• First Article Inspection Report
• IPC J-STD-001E Compliance
• Record of Calibrated Tools Used During Manufacturing
• AOI Report or Visual Inspection Report
• Flying Probe or In-Circuit Testing Report
• Ionic Cleanliness Test Report

If specific documentation or testing is required for a project, contact Sierra Circuits for expert insights on how the necessary tests will be performed.

Manufacturing Parameters for Optimal Mil-Spec Boards

For the best mil-spec boards, adhere to the following parameters:

• Dielectric Thickness Between Two Planes: 3.5 mil minimum
• Annular Ring for Inner Layer: 6 to 7 mil minimum
• Annular Ring for Outer Layer: 6 to 7 mil minimum
• Drill to Copper Clearance: 7 to 8 mil
• Tolerance: 1 to 2%

These parameters are not mandatory but following them ensures boards are manufactured close to perfection.

Click here to learn more about IPC 6012.

Click here to learn more about IPC 2581.