Electronics Manufacturing Services (EMS)

At EI Microcircuits, we pride ourselves on our unwavering commitment to challenging the status quo in providing innovative solutions to our customers. We understand that every problem presents an opportunity for groundbreaking innovation, and we approach each challenge with a mindset geared towards exceeding expectations. With a focus on cutting-edge technology and a dedication to pushing the boundaries of what’s possible, we continuously strive to deliver tailor-made solutions that not only meet but surpass our customers’ needs.

our end-to-end solutions

EI Microcircuits is a solutions-oriented company that excels at leading edge electronics. Our versatile project approach allows us to tailor to each customer’s needs.

Engineering

EI combines manufacturing engineering, design support, and test development to drive product success.

Prototyping

At EI, we offer a complete range of prototype services to meet every customer’s needs.

production

Scalable production for advanced assemblies in diverse industries.

automated test development

Let us help you streamline your testing procedures for greater efficiency and reliability.

warehousing & logistics

Seamless distribution, warehousing, and logistics—delivering precision and reliability at every step.

Man soldering electronics, seated at a workbench in a factory setting, focused.

advanced capabilities

EI is a flexible manufacturing partner specializing in complex, high-reliability assemblies across varied volumes. We support the latest technologies and build to both leaded and RoHS-compliant standards.

surface mount technology (SMT)

We utilize state-of-the-art SMT lines to deliver high-speed, high-precision placement for complex assemblies—supporting everything from low-volume prototyping to full-scale production.

through-hole technology

Our through-hole assembly services provide strong mechanical bonds ideal for high-reliability and high-power applications, supported by skilled technicians and flexible workflows.

inspection

We apply rigorous inspection protocols at every stage—automated optical inspection (AOI), X-ray, and manual review—to ensure quality, accuracy, and compliance without compromise.

box builds

From circuit board integration to full system enclosures, our box build services simplify your production cycle with turnkey, test-ready assemblies.

overmolding

Our overmolding solutions provide added durability, environmental protection, and design flexibility for assemblies that demand rugged performance.

Conformal Coating & Potting

We offer precision potting and conformal coating techniques that protect sensitive electronics from moisture, vibration, and harsh operating conditions.

certified excellence you can trust

With decades of experience serving advanced industries, EI Microcircuits delivers high-reliability electronics that power next-gen technologies and mission-critical applications.

our certifications

Logo: AMTIVO, ISO 13485:2016 Certified, Medical Devices, enclosed in a rounded rectangle.
Logo: AMTIVO, ISO 9001:2015 Certified, Quality Management. White background with black text and outline.
AS9100 D Certified logo, white background with black text, AMTIVO logo, and "Aerospace."
IPC logo with stylized arc and "IPC Member" text below.
ANSI logo: Black letters, "ANSI", with arch above, and "American National Standards Institute" below.
UL certification mark: black letters "UL" within a black circle; trademark symbol in the middle.

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 in lab coats soldering components at a workbench in a factory.

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.