pcb inspection

EI Microcircuits performs multi-level PCB inspection using AOI, X-ray, and manual verification to ensure precision, quality, and compliance. Every board is carefully evaluated to meet the highest industry and customer standards.

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optical inspection

Automated Optical Inspection (AOI) detects misalignments, solder defects, and component issues with high-speed imaging and accuracy.

Red graphic of a circle with radiating lines ending in circles, resembling a circuit.

x-ray inspection

X-ray inspection allows us to verify solder joints and internal connections beneath BGAs and other hidden components.

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3D Solder paste inspection

We use 3D SPI to measure solder paste volume, height, and alignment—ensuring a strong foundation for reliable soldering.

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ict testing

ICT verifies electrical performance, identifying shorts, opens, and component values to ensure every board meets functional specs.

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functional testing

Our functional tests simulate real-world conditions to confirm final assemblies perform exactly as intended.

Red graphic of a circle with radiating lines ending in circles, resembling a circuit.

flying probe testing

Flying probe testing offers flexible, fixture-less validation—ideal for low-volume runs. EI’s in-line systems deliver fast, accurate diagnostics with streamlined efficiency.

certified excellence you can trust

Partner with EI Microcircuits—certified to the highest industry standards and trusted across medical, defense, and industrial markets for precision, quality, and compliance.

applications FOR pcb Inspection

medical

Our multi-stage inspection process ensures every medical PCB meets strict regulatory and quality standards.

industrial

We apply rigorous inspection protocols to validate durability and performance in high-load industrial applications.

energy

EI Micro’s inspection systems verify PCB reliability in energy environments where uptime is non-negotiable.

agriculture

We inspect every agricultural PCB for resilience and precision—so your equipment performs in any condition.

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

Our aviation PCB inspection process is built on traceability, documentation, and flight-critical quality control.

military

Military-grade inspection protocols confirm every assembly meets mission-ready standards under the harshest conditions.

Security and Surveillance

We conduct thorough inspections to guarantee real-time performance and reliability in surveillance and security systems.

through-hole

Durable, high-reliability assembly for rugged and high-power applications.

inspection

Ensures precision, quality, and compliance at every production stage.

box build

EI offers a wide range of box build services including full electromechanical assembly.

overmolding

EI offers premolding and overmolding of a wide variety of materials in house.

potting

Protects electronics from moisture, vibration, and harsh environmental conditions.

our certifications

AMTIVO ISO 13485:2016 Certified for Medical Devices. Logo with an "M" symbol inside a rounded square.
AMTIVO ISO 9001:2015 Certified Quality Management logo with abstract "A" symbol in a rounded-rectangle.
AS9100 D Certified Aerospace logo: white box with black border and AMTIVO logo; text reads "AS9100 D Certified Aerospace."
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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 on circuit boards at a workbench. One is soldering. Black and white photo.

Electronic Insights

A person is holding a motherboard in their hands in a black and white photo.

Field Programmable Gate Arrays (FPGA) Explained

July 7, 2025
Learn how Field Programmable Gate Arrays (FPGAs) work, their types, benefits, and industry applications—from prototyping to high-performance computing.
A bunch of green circuit boards are stacked on top of each other on a table.

Understanding Surface Mount Technology (SMT)

By EI Microcircuits • July 9, 2025
Explore Surface Mount Technology (SMT) in electronics manufacturing—how it enables compact, high-performance assemblies for medical, aerospace, and industrial applications.
A woman is looking at a circuit board with a magnifying glass.

What are Box Build Assemblies in Electronics Manufacturing?

By EI Microcircuits • July 9, 2025
Discover what box build assemblies are in electronics manufacturing. Learn how final product integration—PCBA, enclosures, wiring, testing—boosts quality, speed, and reliability.
A circuit board with the words class 1 2 and 3 on it

Understanding IPC Class 1, 2, & 3 Certifications

By EI Microcircuits • July 9, 2025
Learn the differences between IPC Class 1, 2, and 3 certifications for PCB assemblies. Discover how each class impacts manufacturing quality, reliability, and industry use.

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.