surface mount assembly

EI Microcircuits offers high-speed, high-precision surface mount assembly using advanced automated lines tailored for complex, densely populated PCB designs. Our process supports everything from rapid prototyping to full-scale production while ensuring consistent quality and traceability.

Red circuit diagram: central circle with lines extending to smaller circles.

Package on Package / Part on Part (PoP)

We specialize in high-density Package on Package (PoP) and part-on-part assemblies, enabling compact, multi-functional designs with vertical component stacking and precise alignment.

Red circuit diagram: central circle with lines extending to smaller circles.

Flex & Rigid Flex Assemblies

EI Microcircuits builds flexible and rigid-flex PCB assemblies that support lightweight, space-saving designs for dynamic, high-reliability applications across demanding environments.

Red circuit diagram: central circle with lines extending to smaller circles.

Vapor Phase or Convention Reflows Ovens

Our advanced reflow processes—including vapor phase and convection ovens—ensure consistent soldering profiles, improved thermal control, and superior solder joint integrity across all all board and component types.

advantages of smt

High Component Density: SMT enables the placement of more components in a smaller area, allowing for compact, high-performance designs without compromising functionality.

Faster Assembly Speeds: Automated SMT lines allow for rapid, precise component placement—accelerating production timelines and supporting quick turnarounds.

Improved Reliability: With fewer mechanical connections and stronger solder joints, SMT assemblies are more resistant to vibration, shock, and wear—ideal for high-reliability applications.

Cost Efficiency at Scale: SMT reduces manual labor and supports automated inspection and reflow processes, driving down production costs for medium to high-volume manufacturing.

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 Surface mount assembly

medical

Our precision SMT lines assemble high-density medical PCBs with exacting quality and FDA-aligned processes.

industrial

EI Micro’s robust SMT capabilities support high-reliability assemblies for rugged, high-demand industrial environments.

energy

We provide reliable surface mount assembly for energy systems, balancing performance, scalability, and long-term durability.

agriculture

Our SMT process delivers compact, efficient PCB assemblies that drive smarter, more resilient agricultural technologies.

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

Flight-grade SMT assembly ensures lightweight, tightly controlled PCBs meet the rigorous standards of modern aviation systems.

military

Our military SMT services meet stringent specs for ruggedness, reliability, and mission-critical performance.

Security and Surveillance

We produce fast, accurate SMT assemblies that power real-time security systems with minimal signal loss and maximum uptime.

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

Logo for Amtivo, ISO 13485:2016 Certified for Medical Devices, in a rounded rectangle with a black and white design.
ISO 9001:2015 Certified logo with AMTIVO branding, indicating quality management.
Logo for AMTIVO: AS9100 D Certified, Aerospace, with stylized "AM" symbol inside a rounded rectangle.
Empty white space.
Empty white canvas.
Blank white background.

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 a factory soldering circuit boards at a workbench.

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.