pcb production

EI Microcircuits operates multiple climate-controlled facilities designed for scalability, technical excellence, and built-in disaster resilience—each fully equipped to support today’s most advanced electronic assemblies.

our production services

surface mount technology (SMT)

Our state-of-the-art SMT lines deliver high-speed, high-accuracy placement for complex, densely populated PCB assemblies—ideal for everything from rapid prototyping to full-scale production.

through-hole

We provide robust through-hole assembly solutions for high-reliability applications, using automated selective soldering to ensure strong mechanical bonds and long-term durability in mission-critical systems.

advanced inspection techniques

Every board undergoes multi-stage inspection, including Automated Optical Inspection (AOI), Solder Paste Inspection (SPI), X-ray, and visual checks, ensuring unmatched quality, traceability, and compliance.

ICT, Functional and Flying Probe Testing

Our ICT, functional, and flying probe testing services provide fast, accurate validation of populated boards—detecting shorts, opens, component values, and performance issues without requiring custom fixtures, making them ideal for both prototypes and low-volume runs.

box builds

We offer full-system integration through our box build services, assembling everything from PCB-level components to enclosures, cables, and final test-ready products.

overmolding

Our overmolding process provides added protection and durability, sealing sensitive components against moisture, abrasion, and harsh operating conditions.

potting

We use precision potting to safeguard electronics from environmental stressors like vibration, shock, and thermal fluctuations—ideal for ruggedized applications.

Automated Conformal Coating

Using automated systems, we apply consistent, protective conformal coatings that defend PCBs against moisture, dust, and chemical exposure while maintaining electrical performance.

our pcb engineering process

01.

Design Review

We collaborate early to review schematics and conduct Design for Manufacturability (DFM) analysis—ensuring your layout is optimized for efficient, high-yield production.

02.

Prototyping & Validation

Our rapid prototyping services turn designs into functional units fast, enabling thorough testing, feedback, and early design validation.

03.

Pre-Production Optimization

We fine-tune materials, processes, and test plans to ensure a smooth transition from prototype to full production—reducing risk and ensuring scalability.

04.

Full-Scale Production Support

With engineering oversight, quality control, and documentation throughout, we scale up seamlessly while maintaining precision and consistency across every unit.

our industry experience

medical

EI Microcircuits delivers full-scale PCB production for medical devices with unmatched precision, traceability, and compliance.

industrial

Our industrial PCB production meets demanding operational environments with durable, high-volume manufacturing you can rely on.

energy

We produce robust PCBs built for efficiency, reliability, and continuous operation in complex energy systems.

agriculture

From environmental controls to autonomous machinery, our PCB production powers modern agricultural innovations at scale.

EI Microcircuits builds high-layer count, high-performance assemblies for the emerging AI market. Our advanced SMT and quality systems ensure reliable, complex builds for HPC applications.

aviation

We manufacture flight-ready PCBs with certified processes that meet strict aviation standards for quality and safety.

military

Mission-critical defense systems count on our rugged, spec-driven PCB production for durability and operational excellence.

Security and Surveillance

Our production process ensures high-performance PCBs built to support secure, real-time surveillance and monitoring systems.

our certifications

ISO 13485:2016 certified badge, AMTIVO logo, text "Medical Devices".
Logo for AMTIVO. ISO 9001:2015 Certified for Quality Management. Features a stylized "A".
A square badge with "AMTIVO" logo and "AS9100 D Certified Aerospace" text.
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White background.
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hear it from our customers

"A delightful company to work with. Could not have done it without your expertise."

"EI excels in responsiveness, support and flexibility. I very much appreciate EI’s ability to adapt on the fly."

"I appreciate the work EI does most of all because it makes my job easier."

"Overall, EI does a great job in dealing with everything we throw at them. They are responsive and understanding of us, even though it may not always be the most reasonable of requests. As a buyer, I feel lucky to have a supplier that works with us like they do."

"Working on a project that had a board that was simply not manufacturable the way it was set up, EI went above and beyond to help with engineering and still met a very short deadline."

Two women working at a workbench soldering. One wears glasses and concentrates. Industrial setting.

PCB Production FAQs

  • How do you transition a PCB from prototype to production?

    A controlled transition should confirm the released design, bill of materials, process instructions, tooling, inspection criteria, test coverage, and material supply strategy. We use the new product introduction process to establish a repeatable manufacturing baseline before recurring builds.

  • What is considered low- to medium-volume PCB production?

    EI Microcircuits specializes in high-mix, low- to medium-volume electronics manufacturing. Production requirements vary by program, so we evaluate each project based on complexity, quality requirements, scheduling needs, and expected build quantities.

  • How can OEMs reduce PCB production lead times?

    Maintain accurate forecasts, release complete documentation, resolve DFM questions early, and identify long-lead components before scheduled builds. Supplier coordination and material planning are often as important to production lead time as the assembly process itself.

  • Can PCB production quantities change from one build to another?

    Yes. High-mix manufacturing programs often require changes in batch size, product mix, and delivery schedules. A flexible manufacturing strategy helps accommodate those fluctuations while maintaining established process controls and product requirements.

Electronic Insights

Gold-colored printed sheets on a large press machine in a workshop

Overcoming the PCB Laminate Shortage: A DFM Guide

August 26, 2026
Meta description: Learn how to navigate the PCB laminate shortage with DFM, material planning, and production strategies from EI Microcircuits.
Person soldering a green circuit board on a workbench with tools nearby

PCB Material Selection Guide

August 21, 2026
PCB Material Selection impacts performance, reliability, and manufacturing. Learn key material considerations and applications with guidance from EI Microcircuits.
Blue circuit board overlaid on technical schematics with a central chip and small components

The Importance of PCB Layout

August 18, 2026
Learn how PCB layout impacts performance, manufacturability, testing, and long-term reliability with expert insights from EI Microcircuits.

let's talk

EI Microcircuits operates multiple climate-controlled facilities designed for scalability, technical excellence, and built-in disaster resilience—each fully equipped to support today’s most advanced electronic assemblies. Let us be the solution to your next project—Contact Us, Request a Quote, or Schedule a Tour today!

Contact Us Today

MANKATO, MN

1651 Pohl Road
Mankato, MN 56001
P: 507.345.5786

ST. PETER, MN

2011 Klein Street
St. Peter, MN 56082
P: 507.934.5722

MANKATO, MN

69 Power Drive
Mankato, MN 56001

P: 507.386.9160

*Each facility is configured to support your production needs. While maintaining continuity with each other in equipment, training and process control. All facilities share the same data center to allow for seamless manufacturing between locations.