The semiconductor industry in Illinois involves the design, manufacturing, and sale of essential components for electronic devices. Companies across this field include semiconductor manufacturers, technology solution providers, and component sales representatives, all focused on meeting the diverse demands of various sectors like telecommunications and aerospace. The industry is progressing towards advanced materials and energy-efficient solutions, driven by increased demand from emerging technologies in IoT, renewable energy, and communications. With emerging players, Illinois showcases a collaborative environment ripe for innovation at all levels of semiconductor production.

This listing highlights 19 notable semiconductor companies based in Illinois, most of which are privately owned and maintain smaller to mid-sized workforces. Founded primarily in the 2000s, these companies range from specialized manufacturers like MicroLink Devices in solar technology to innovative firms like Akhan focusing on diamond-based solutions. Headquartered in locations from Chicago to Geneva, each company offers unique products tailored to sectors such as aerospace, telecommunications, and consumer electronics, contributing to both local and global markets.

Read on to discover the top semiconductor companies in Illinois.

Top 19 Semiconductor Companies Companies in Illinois

1. MicroLink Devices, Inc.

• Website: mldevices.com
• Ownership type: Private
• Headquarters: Niles, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: microlink-devices-inc.

MicroLink Devices, Inc., founded in 2000 and based in Niles, Illinois, is a private semiconductor manufacturer that specializes in high-efficiency solar cells and RF semiconductor materials. The company operates from a 30,000 square foot facility equipped with advanced manufacturing capabilities, including a clean room and device fabrication laboratory. MicroLink focuses on the growth and fabrication of III-V epitaxial materials, which are essential for wireless communications and solar energy applications. Their products include lightweight, flexible solar cells designed for UAVs and space applications, as well as epitaxial materials used in cellular phones and other wireless devices. MicroLink has established itself as a key supplier in the aerospace sector, recognized by major companies like Airbus for its contributions to high-altitude pseudo-satellite platforms. The company also engages in contract engineering services, supporting various U.S. government agencies in research and development projects related to solar technology and RF devices. With a dedicated team of experts, MicroLink is committed to innovation and quality in the semiconductor industry.

2. Richardson RFPD

• Website: richardsonrfpd.com
• Ownership type: Private
• Headquarters: Geneva, Illinois, United States (USA)
• Employee distribution: United States (USA) 24%, China 18%, Italy 17%, Other 41%
• Founded year: 2011
• Headcount: 201-500
• LinkedIn: richardson-rfpd

Richardson RFPD, founded in 2011 and based in Geneva, Illinois, is a technology solutions provider that specializes in RF and microwave components, energy storage, and IoT products. The company serves businesses in the electronics and telecommunications sectors, offering a broad array of products and design support to address complex technological challenges. With a workforce of around 300 employees, Richardson RFPD operates globally, with significant employee distribution in countries such as China, Italy, and the UK. Their product offerings include semiconductors, both discrete and integrated circuits, alongside other electronic components. They are known for their commitment to customer support and have a strong emphasis on providing design assistance, which is crucial for clients navigating intricate electronic applications.

3. EAS SALES, Inc.

• Website: eassales.com
• Ownership type: Private
• Headquarters: Hoffman Estates, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2002
• Headcount: 11-50
• LinkedIn: eas-sales-inc-

EAS SALES, Inc., founded in 2002 and based in Hoffman Estates, Illinois, is a technology manufacturer representative specializing in semiconductor technologies, passive electromechanical components, and embedded systems. The company serves original equipment manufacturers (OEMs), distributors, and contract electronic manufacturers (CEMs) primarily in Northern Illinois and Southern Wisconsin. With a team of experienced professionals, EAS SALES leverages its established relationships with top-tier semiconductor manufacturers to provide clients with high-quality technology solutions. Their expertise not only enhances product quality but also accelerates time to market for their customers. EAS SALES is committed to customer-focused service and technical support, ensuring that clients receive the best possible solutions for their design and engineering needs. The company is employee-owned, which fosters a strong commitment to customer satisfaction and operational excellence.

4. Akhan

• Website: akhansemi.com
• Ownership type: Private
• Headquarters: Gurnee, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $20.0M, February 2022
• Founded year: 2013
• Headcount: 11-50
• LinkedIn: akhan-technologies-inc-

Akhan Semiconductor, founded in 2013 and based in Gurnee, Illinois, is a technology innovator specializing in diamond-based solutions for various applications, including glass, optics, and semiconductors. The company has developed products like DiamondScreen, which enhances the durability and performance of consumer electronics displays, and Diamond Electronics, which leverages diamond's superior thermal and electrical properties for next-generation semiconductor devices. Akhan's technology is particularly relevant in industries such as aerospace, military, automotive, and telecommunications, where high-performance materials are essential. The company has also secured $20 million in funding as of February 2022, reflecting its potential for growth and innovation in the semiconductor space.

5. Sigenics, Inc.

• Website: sigenics.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Grant), $1.0M, May 2017
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: sigenics-inc-

Sigenics, Inc., founded in 2000 and based in Chicago, Illinois, is a private semiconductor manufacturer that specializes in custom integrated circuits and ASIC design services. With a workforce of 11-50 employees, Sigenics caters to various sectors, including medical, aerospace, and industrial markets. The company is known for its expertise in developing high-quality, application-specific integrated circuits that meet stringent industry standards. Sigenics offers a full turnkey service, guiding clients through the entire design and manufacturing process. They also address the growing need for obsolete part replacements, providing reverse engineering services to create exact replacements for outdated components. Their work includes collaborations with organizations like NIH and DARPA, highlighting their involvement in significant projects within the medical field. Sigenics has received funding, including a grant of $1 million in 2017, which supports their ongoing development and innovation in semiconductor technology.

6. NHanced Semiconductors, Inc.

• Website: nhanced-semi.com
• Ownership type: Private
• Headquarters: Batavia, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2016
• Headcount: 11-50
• LinkedIn: nhanced-semiconductors-inc.

NHanced Semiconductors, Inc., founded in 2016 and based in Batavia, Illinois, is a private semiconductor manufacturer that specializes in advanced packaging solutions. The company offers a comprehensive range of services, including design, fabrication, and testing, tailored for specialized markets such as government and medical sectors. NHanced is recognized as the first pure-play advanced packaging foundry in the USA, emphasizing their commitment to innovation in semiconductor manufacturing. Their proprietary Foundry 2.0 model enables the integration of dies and chiplets from various sources, allowing for customized system-level solutions. This approach not only enhances product performance but also reduces development costs significantly. With a team of experienced professionals, NHanced is well-equipped to handle complex device requirements, making them a valuable partner in the semiconductor industry.

7. Industrial Representatives, Inc (IRI)

• Website: irirep.com
• Ownership type: Private
• Headquarters: Northfield, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1962
• Headcount: 11-50
• LinkedIn: industrial-representatives-inc-iri-

Industrial Representatives, Inc. (IRI), founded in 1962, is a private technology sales firm based in Northfield, Illinois. With a team of around 22 employees, IRI specializes in the sales of electronic components and systems, including semiconductors, passive components, and embedded systems. The company serves a wide array of industries such as aerospace, automotive, medical, and telecommunications, providing essential support for design and engineering needs. IRI's consultative approach allows them to assist clients in navigating complex technology requirements, ensuring that they can meet their design goals efficiently. Their commitment to delivering high-quality products and services has established them as a trusted partner in the technology sales sector, particularly in the semiconductor market.

8. Molex

• Website: molex.com
• Ownership type: Corporate
• Headquarters: Lisle, Illinois, United States (USA)
• Employee distribution: United States (USA) 34%, India 22%, Mexico 14%, Other 31%
• Latest funding: $7.2B, September 2013
• Founded year: 1938
• Headcount: 10001+
• LinkedIn: molex

Molex LLC, based in Lisle, Illinois, has been a significant player in the connectivity solutions market since its founding in 1938. The company specializes in manufacturing electronic, electrical, and fiber optic connectivity systems, offering over 100,000 products, including connectors and cable assemblies. Molex serves a variety of industries, such as automotive, medical, and telecommunications, providing reliable interconnect solutions that enhance the performance of electronic devices. With a global presence, Molex operates manufacturing facilities in multiple countries, including the USA, India, Mexico, and China. Their products are crucial for applications ranging from advanced driver assistance systems in vehicles to high-speed data transmission in telecommunications. Molex's commitment to innovation is evident in their continuous development of new technologies and solutions that meet the evolving demands of the market.

9. Itw-lumex

• Website: lumex.com
• Ownership type: Private
• Headquarters: Carol Stream, Illinois, United States (USA)
• Employee distribution: Taiwan 50%, United States (USA) 50%
• Founded year: 1912
• Headcount: 51-200
• LinkedIn: lumex_2

Itw-lumex, based in Carol Stream, Illinois, is a private electronic component manufacturer with a history dating back to 1912. The company is part of ITW and has carved out a niche in the optoelectronics industry, focusing on high-efficiency LEDs and LCDs. They cater to a variety of sectors, including industrial controls and medical equipment, offering both standard and semi-custom products. Lumex is known for its technical design specialists who collaborate with clients to develop effective solutions tailored to specific application needs. Their product range includes advanced technologies such as UV, visible, and infrared LEDs, as well as customizable display solutions. With a balanced employee distribution between the United States and Taiwan, Itw-lumex demonstrates a global presence in the semiconductor market.

10. Inprentus

• Website: inprentus.com
• Ownership type: Venture Capital
• Headquarters: Champaign, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Seed, $283,000, September 2019
• Founded year: 2012
• Headcount: 1-10
• LinkedIn: inprentus

Inprentus is a precision optics company based in Champaign, Illinois, founded in 2012 by a physics professor from the University of Illinois Urbana-Champaign. The company specializes in the design, manufacture, and sale of high-performance diffraction gratings. These gratings are essential for various applications, including scientific research, spectroscopy, and notably, semiconductor manufacturing. Inprentus has developed a unique nano-scale contact mode lithography technique that allows for the production of gratings with exceptional precision. Their products are utilized by Fortune 500 companies, academic institutions, and government laboratories, highlighting their role in advanced optical solutions. Inprentus has received seed funding, which supports their ongoing innovation and development in the optics sector, particularly in applications related to semiconductor technology.

11. Connor Winfield

• Website: conwin.com
• Ownership type: Private
• Headquarters: Aurora, Illinois, United States (USA)
• Founded year: 1963
• Headcount: 201-500
• LinkedIn: connor-winfield

Connor Winfield Corporation, established in 1963 and based in Aurora, Illinois, is a private electronic manufacturer that specializes in quartz-based timing circuits and oscillators. The company designs and produces a wide range of products, including timing integrated circuits (ICs), oscillators, and crystals. Their offerings are particularly vital for businesses in telecommunications and electronics, where precise timing solutions are crucial. Connor Winfield has expanded its product line over the years while maintaining a strong focus on its core competencies in frequency control. The company is ISO 9001:2015 certified, reflecting its commitment to quality management and continuous improvement. They also emphasize environmental responsibility, adhering to regulations and striving to reduce their operational impact. Connor Winfield's products are integral to various applications, including telecommunications, LAN and WAN products, and microprocessor-based systems, showcasing their significant role in the semiconductor industry.

12. Numat

• Website: numat.com
• Ownership type: Venture Capital
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 97%, Taiwan 3%
• Latest funding: Series B, $12.4M, April 2018
• Founded year: 2013
• Headcount: 51-200
• LinkedIn: numat-technologies

Numat Technologies, Inc., founded in 2013 and based in Chicago, Illinois, is a chemical solutions provider that specializes in advanced materials and technologies for the semiconductor and industrial sectors. The company is known for its innovative products like ION-X®, which is a sub-atmospheric gas storage and purification system, and SENTINEL™, a high-performance air filtration and purification solution. Numat's focus on precision chemistry allows them to effectively capture and separate hazardous chemicals, which is crucial for semiconductor manufacturing processes. Their clientele includes businesses in the semiconductor industry, highlighting their relevance in this sector. Numat has received significant funding, with a Series B round totaling $12.4 million in April 2018, indicating investor confidence in their technology and market potential.

13. Alpha Circuit I LLC

• Website: alphacircuit.com
• Ownership type: Private
• Headquarters: Elmhurst, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1982
• Headcount: 51-200
• LinkedIn: alpha-circuit-corporation

Alpha Circuit I LLC, based in Elmhurst, Illinois, has been a player in the printed circuit board (PCB) manufacturing sector since its founding in 1982. The company focuses on producing high-quality PCBs and offers services such as quick-turn prototypes and thermal management solutions. They cater to a variety of industries, including medical diagnostics, automotive, aerospace, and industrial automation. Alpha Circuit emphasizes rapid production capabilities, ensuring that they can meet the urgent demands of their clients. Their commitment to quality is reflected in their certifications, including TS16949 for automotive and AS9100 for aerospace, which highlight their adherence to rigorous industry standards. With a dedicated team and a focus on innovation, Alpha Circuit continues to adapt to the evolving needs of the electronics market, making them a significant contributor to the PCB segment of the semiconductor supply chain.

14. Crescend Technologies, LLC

• Website: crescendrf.com
• Ownership type: Private
• Headquarters: Glendale Heights, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1979
• Headcount: 51-200
• LinkedIn: crescend-technologies-llc

Crescend Technologies, LLC, based in Glendale Heights, Illinois, is a technology manufacturer that has been operational since 1979. The company specializes in solid-state microwave energy solutions, providing advanced microwave generators and amplifiers tailored for commercial, industrial, and defense applications. Their innovative technology is particularly relevant in sectors such as food processing, where efficient heating solutions are critical. Crescend is recognized as the only North American manufacturer of high-power solid-state microwave energy generators, with products that range from 2.5 kilowatts to 50 kilowatts and beyond. They have made significant strides in the industry, including the introduction of the world’s first 50-kilowatt solid-state microwave generator in 2019. Their commitment to clean energy and reduced emissions aligns with current industry trends towards sustainability. Crescend Technologies also offers engineering services, including system design and testing, further solidifying their role in the microwave energy market.

15. Mitsubishi Electric Automation, Inc.

• Website: us.mitsubishielectric.com
• Ownership type: Corporate
• Headquarters: Vernon Hills, Illinois, United States (USA)
• Employee distribution: United States (USA) 49%, India 17%, Mexico 10%, Other 24%
• Latest funding: May 2024
• Founded year: 1997
• Headcount: 201-500
• LinkedIn: mitsubishi-electric-automation-inc

Mitsubishi Electric Automation, Inc., based in Vernon Hills, Illinois, is a technology manufacturer that specializes in a wide array of electrical and electronic products and systems. Founded in 1997, the company operates within various industries, including construction and manufacturing. Mitsubishi Electric is recognized for its solutions in air conditioning, automation, and energy systems. Notably, the company has a dedicated semiconductor division that produces power modules, driver ICs, and high-frequency devices, which are crucial for efficient power control and communication technologies. Their semiconductor products are designed to enhance performance and energy savings across multiple applications, from industrial machinery to consumer electronics. The company emphasizes innovation and efficiency, aiming to help customers improve operations and reduce energy consumption. With a workforce of over 2,200 employees, Mitsubishi Electric Automation continues to contribute to advancements in technology and sustainability.

16. EeroQ Quantum Hardware

• Website: eeroq.com
• Ownership type: Venture Capital
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Seed, April 2024
• Founded year: 2016
• Headcount: 11-50
• LinkedIn: eeroq

EeroQ Quantum Hardware, founded in 2016 and based in Chicago, Illinois, is a venture capital-backed company focused on advancing quantum computing technology. The firm is dedicated to developing scalable quantum computers by leveraging innovative techniques that utilize electrons and superfluid helium. Their unique approach involves trapping individual electrons above pools of superfluid helium, which serve as qubits for their quantum systems. This method not only enhances the coherence times of qubits but also allows for integration with existing semiconductor fabrication processes. EeroQ's clientele includes businesses and research institutions that seek cutting-edge computing solutions for complex challenges across various sectors, including biomedical research and climate change. The company is also a proud founding member of the Quantum Industry Coalition, highlighting its commitment to the growth and development of the quantum computing sector.

17. Coilcraft, Inc.

• Website: coilcraft.com
• Ownership type: Private
• Headquarters: Cary, Illinois, United States (USA)
• Employee distribution: United States (USA) 65%, Indonesia 12%, India 5%, Other 18%
• Founded year: 1945
• Headcount: 1001-5000
• LinkedIn: coilcraft

Coilcraft, Inc., founded in 1945 and based in Cary, Illinois, is a manufacturer of magnetic components, focusing on inductors and transformers. The company serves a variety of industries, including automotive and consumer electronics, providing high-performance products that enhance energy efficiency and signal integrity. Coilcraft is known for its commitment to quality, offering design support tools and free samples to engage with customers effectively. Their products are critical in applications such as power management, RF signal processing, and EMI suppression, making them a significant player in the electronic components sector. With a workforce of over 400 employees and a global presence, Coilcraft continues to innovate in the field of magnetic components, supporting the needs of modern electronic designs.

18. American Standard Circuits, LLC

• Website: asc-i.com
• Ownership type: Private
• Headquarters: West Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 96%, Canada 4%
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: american-standard-circuits-inc-

American Standard Circuits, LLC, founded in 1988 and based in West Chicago, Illinois, is a manufacturer that specializes in printed circuit boards (PCBs). The company serves various industries, including military, aerospace, telecommunications, and medical sectors. They offer a wide range of products and services, such as Flex/Rigid Flex PCBs, RF/Microwave PCBs, and custom PCB solutions. Their capabilities extend to ultra-high density interconnects and metal-backed PCBs, which are crucial for thermal management in electronic devices. American Standard Circuits also provides consulting services, quick-turn PCB production, and inventory management, showcasing their commitment to meeting the needs of their clients. The company has formed a strategic alliance with Sunstone Circuits, enhancing their service offerings and expertise in PCB manufacturing. This partnership allows them to provide comprehensive solutions from design to large-scale production, further solidifying their role in the electronics industry.

19. HY Connect

• Website: hyc.com
• Ownership type: Private
• Headquarters: Chicago, Illinois, United States (USA)
• Employee distribution: United States (USA) 80%, India 20%
• Founded year: 2015
• Headcount: 51-200
• LinkedIn: hy-connect

HY Connect, also known as Suzhou HYC Technology Co., Ltd., is a private company based in Chicago, Illinois, founded in 2015. With a workforce of around 69 employees, the company focuses on providing high-precision testing equipment tailored for display panels, smart wearables, and automotive electronics. Their services cater to manufacturers in the electronics and automotive sectors, ensuring that products meet stringent quality and reliability standards. Notably, HY Connect operates within the semiconductor testing domain, offering solutions that are vital for the production of semiconductors used in various applications. Their commitment to quality and innovation has established them as a trusted partner for manufacturers, particularly in the semiconductor and electronics industries.

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