Illinois has a well-established electronics manufacturing ecosystem covering PCB fabrication, PCB assembly, electronic product development, contract manufacturing, engineering, and specialized component production. For OEMs, startups, engineering teams, and procurement professionals, choosing the right supplier depends on the company’s actual manufacturing capabilities, engineering support, production requirements, and ability to handle projects from prototype to production.

If you are searching for electronics manufacturing companies in Illinois, the following companies represent a range of capabilities, from quick-turn PCB manufacturing and assembly to complete electronic product development and contract manufacturing.

Top Electronics Manufacturing Companies in Illinois

1. Precision PCB

Precision PCB, operated by Precision Technologies, provides a one-stop approach to PCB fabrication and electronics assembly. The company works with customers requiring quick-turn boards, high-mix production, and assembly support. Its official information also highlights its expansion of assembly capabilities through the acquisition of MicroPlace assets.

Services Offered:

• Quick-turn PCB fabrication
• PCB assembly
• SMT, through-hole, and mixed-technology assembly
• Custom PCB solutions
• Prototype PCB production
• Low-volume and high-mix PCB manufacturing
• Component procurement
• SMT stencil services

Precision PCB is located in Elgin, Illinois, and provides integrated PCB manufacturing and assembly for customers seeking a single manufacturing source.

2. Circuitek Solutions Inc.

Circuitek Solutions focuses on PCB design, manufacturing, and assembly, with support for projects ranging from prototypes to production quantities. Its manufacturing approach combines PCB engineering with fabrication and assembly so that design decisions can be evaluated from a production perspective.

Services Offered:

• PCB design and engineering
• PCB manufacturing
• PCB assembly
• Prototype PCB assembly
• Production PCB assembly
• SMT assembly
• AOI and X-ray inspection
• Functional and electrical testing
• Design-for-manufacturing support
• Rigid, flex, rigid-flex, HDI, RF and microwave PCB solutions

The company operates from Schaumburg, Illinois, and also highlights domestic PCB manufacturing for ITAR-controlled and Made-in-USA projects.

3. T.J. Assemblies Inc.

T.J. Assemblies has developed its manufacturing capabilities around electronic components and specialized production services. Rather than focusing only on conventional electronics assembly, the company combines component manufacturing with machining, tooling, and joining processes.

Services Offered:

• Electronic component assembly
• Custom bobbins and coil forms
• CNC machining
• Electrical discharge machining
• Custom tooling
• Thread tapping
• Sonic welding
• Thermoplastic component production
• Contract pinning and terminating

These capabilities allow T.J. Assemblies to support applications involving motors, transformers, relays, chokes, ballasts, and other electronic components.

4. Tecnova Electronics

Tecnova Electronics, Inc. is an electronic contract manufacturer based in Waukegan, Illinois. Its manufacturing model covers PCB assembly as well as electro-mechanical and complete product assembly, making it suitable for OEMs that need more than board-level production.

Services Offered:

• SMT PCB assembly
• Through-hole assembly
• PCB assembly manufacturing
• Electro-mechanical assembly
• Sub-assembly manufacturing
• Full box-build manufacturing
• Cable and wire harness assembly
• Product testing
• Design-for-manufacturing support
• Turnkey electronic manufacturing

Tecnova specifically supports projects from prototype development through larger-scale production and operates an ISO 9001-certified manufacturing facility.

5. Delta Circuits Inc.

Delta Circuits specializes in printed circuit board design, prototyping, and manufacturing. Its official service information emphasizes rapid prototyping and PCB production, with manufacturing conducted primarily at its West Chicago facility.

Services Offered:

• Rapid PCB prototyping
• PCB design
• Printed circuit board manufacturing
• Custom PCB production
• Multilayer PCB manufacturing
• Circuit board solutions for automotive applications
• Computer and data-related PCB manufacturing
• Telecommunications PCB manufacturing

Delta Circuits supports customers across industries including automotive, telecommunications, medical, aerospace and defense, industrial, commercial, and consumer electronics.

6. American Precision Electronics, Inc.

American Precision Electronics, commonly known as APE, specializes in electronic manufacturing services with PCB assembly as its core manufacturing focus. Its official capabilities cover the production process from manufacturability evaluation and material sourcing through assembly, testing, and fulfillment.

Services Offered:

• SMT PCB assembly
• Through-hole assembly
• Mixed-technology assembly
• Turnkey manufacturing
• Manufacturing engineering
• Manufacturability analysis
• AOI inspection
• In-circuit testing
• Functional testing
• Wave soldering
• Conformal coating
• Fulfillment services

APE operates from a 30,000-square-foot facility in Carol Stream, Illinois, and supports applications in aerospace and defense, medical devices, communications, industrial automation, automotive, transportation, and other demanding industries.

7. Allfavor Technology, Inc.

Allfavor Technology provides PCB manufacturing solutions through its North American operation in Schaumburg, Illinois. The company offers a broad range of PCB technologies and also provides engineering and supply-chain-related value-added services.

Services Offered:

• Rigid PCB manufacturing
• Flexible PCB manufacturing
• Rigid-flex PCB manufacturing
• RF/HF PCB production
• Metal-clad PCBs
• Prototype PCB production
• Engineering services
• PCB inspection
• Electrical testing
• Impedance testing
• Plating and finish testing
• USA warehousing and stocking
• Consignment programs

Allfavor’s Schaumburg facility functions as its North American division and provides customer service, engineering, stocking, and consignment support.

8. Chicago Firmware Factory

Chicago Firmware Factory takes a product-development-oriented approach to electronics manufacturing. Its official information identifies firmware development, electronic circuit design, prototyping, and manufacturing as its core areas of work.

Services Offered:

• Embedded software development
• Firmware development
• Electronic circuit design
• PCB-related development
• Electronics prototyping
• Manufacturing support
• LCD and TFT-related development
• OLED applications
• Data recording systems
• Signal processing solutions

The company works with commercial, medical, and industrial applications, making it relevant for businesses that need electronics engineering and firmware expertise alongside manufacturing support.

9. ZDM Technologies

ZDM Technologies provides PCB design, manufacturing, and circuit board assembly with an emphasis on supporting customers throughout the product lifecycle. Its official website describes a “Womb to the Tomb” service approach that combines design, engineering, manufacturing, and supply-chain support.

Services Offered:

• PCB design
• PCB manufacturing
• Circuit board assembly
• Parts sourcing
• Supply-chain services
• Manufacturing engineering support
• Assembly inspection
• Manufacturing improvement recommendations

ZDM also states that assembled circuit boards go through two full inspection cycles, while its engineering team works with customers on changes that can improve manufacturability and assembly.

10. KW Fabrication

KW Fabrication combines electronic manufacturing with industrial design, engineering, metal fabrication, and product assembly. Its model is particularly suited to companies developing physical products that require both electronics and mechanical components.

Services Offered:

• PCB design and layout
• PCB manufacturing
• PCB modifications and redesign
• Electronic system development
• Short-run PCB production
• Contract manufacturing
• Product assembly
• Prototype development
• Engineering consulting
• Sheet metal fabrication
• Electro-mechanical assembly
• Packaging and distribution
• Troubleshooting and field service

KW Fabrication specifically focuses on short-run and custom manufacturing while also supporting larger production requirements through its manufacturing network. Its services can combine electronics, wiring, metal parts, and other product components into a complete manufacturing program.

Electronics Manufacturing Services Available in Illinois

The companies above demonstrate the breadth of electronics manufacturing available across Illinois. Depending on the supplier, businesses can access PCB fabrication, SMT and through-hole assembly, electronic product development, prototyping, testing, component sourcing, box builds, cable and wire harness assembly, and contract manufacturing.

For companies developing new electronic products, engineering support and design-for-manufacturing can be particularly important. For established OEMs, production scalability, inspection, testing, sourcing, and supply-chain management may have greater importance.

How to Select an Electronics Manufacturing Company in Illinois?

The right manufacturer should be selected according to the technical and commercial requirements of the project. Before choosing a supplier, buyers should evaluate:

• PCB and assembly capabilities
• Prototype and production capacity
• SMT and through-hole capabilities
• Engineering and DFM support
• Testing and inspection processes
• Component sourcing capabilities
• Quality requirements
• Production volume and lead times
• Experience with the target industry
• Ability to support future production growth

A supplier that can support multiple stages of development can also reduce the need to coordinate separate vendors for PCB manufacturing, assembly, testing, and final product integration.

Conclusion

Illinois offers a diverse electronics manufacturing base ranging from specialized PCB manufacturers to full-service electronic contract manufacturers and engineering-driven product development companies. The companies listed above provide different combinations of PCB fabrication, assembly, design, prototyping, testing, engineering, and contract manufacturing services.