The semiconductor industry in Connecticut is an exciting and dynamic sector, presenting a wide range of companies deeply involved in innovation and progress. These manufactures contribute to the creation of semiconductor products used in everything from computing to communication systems, demonstrating their broad market application. The scale ranges from large, global entities displaying advanced technological prowess such as Photronics, to niche providers offering specialized services like AG Semiconductor Services. As manufacturers continue to push the bounds of what semiconductor technology can accomplish, this industry remains on a path of steady advancement, playing an integral role in the digital revamp of the future.


Top 19 semiconductor manufacturing companies in Connecticut

1. Photronics

  • Website: photronics.com
  • Headquarters: Brookfield, Connecticut, United States
  • Founded: 1969
  • Headcount: 1001-5000
  • Latest funding type: Ipo
  • LinkedIn

Photronics is a global organization that provides local manufacturing, products, and services in 11 facilities across Asia, North America, and Europe. As a leader in photomask technologies and solutions, they serve the semiconductor and flat panel display industries. Their specialized products support leading-edge technologies for integrated circuits (IC) and flat panel displays (FPD), and they have a global presence, unmatched product breadth, and technological prowess.


2. AG Semiconductor Services, LLC

AG Semiconductor Services (AGSS) is a leading provider of used electronics manufacturing equipment in the semiconductor industry. They specialize in semiconductor manufacturing, IC test/assembly, and printed circuit board assembly equipment. With a focus on quality, flexibility, and availability, AGSS offers a range of services including cleanroom and warehousing services, acquisitions, compliance, equipment remarketing, insurance, project management, sales, and transport & logistics.


3. GTI Technologies, Inc.

  • Website: gti-usa.com
  • Headquarters: Shelton, Connecticut, United States
  • Founded: 1978
  • Headcount: 11-50
  • LinkedIn

GTI Technologies is a global manufacturing company that specializes in semiconductor manufacturing, advanced materials, and metalworking. With over 40 years of experience, GTI has been providing top-quality manufacturing equipment to North American, European, and Russian markets.


4. Prospect Products Inc (PPI)

Prospect Products Inc. is a semiconductor test probe manufacturing company that offers leadership with overall responsibility for production, pricing, planning, shipping/receiving, purchasing and quality. The company has customers located in North America, Asia and Europe.


5. Silicon Integration Inc

Silicon Integration is an electronic contract manufacturing company specializing in cost-effective low to high volume PCB assembly, including complex surface mount and mixed technology. They apply world-class manufacturing principles, advanced technologies, and state-of-the-art software tools to help their customers get their products to market faster with increased profitability.


6. MacDermid Alpha Electronics Solutions

MacDermid Alpha Electronics Solutions is a company that offers integrated solutions in electronics design and manufacturing. They provide unmatched capabilities in electronics circuitry, assembly, and semiconductor divisions. Their products and solutions bridge the performance gap to next-generation devices, enabling the widespread deployment of big data, AI, and other intensive applications.


7. Hygrade Precision Technologies, LLC

  • Website: hygrade.com
  • Headquarters: Plainville, Connecticut, United States
  • Founded: 1962
  • Headcount: 11-50
  • LinkedIn

Hygrade Precision Technologies is a manufacturing company that offers a wide range of machining and grinding services. With expertise in blanchard/flat grinding, lapping, double disc grinding, and precision assembly, we provide high-quality solutions for customers in various industries. Our commitment to quality assurance and customer approvals sets us apart, and we prioritize proactive communication and transparent lead times to keep projects on schedule.


8. Gems Sensors

  • Website: gemssensors.com
  • Headquarters: Plainville, Connecticut, United States
  • Founded: 1955
  • Headcount: 201-500
  • LinkedIn

Gems Sensors and Controls specializes in fluid sensing and control solutions for various industries such as renewable energy, food & beverage, HVAC/boiler control, medical, oil & gas, power generation, printing, process, tank gauging, semiconductors, specialty & off-highway vehicles, transportation, and water & wastewater. They offer a wide range of products including level sensors, pressure sensors, flow sensors, valves, solenoids, manifolds, conductivity fittings, and temperature switches.


9. Intersurface Dynamics Inc

  • Website: isurface.com
  • Headquarters: Bethel, Connecticut, United States
  • Founded: 1985
  • Headcount: 11-50
  • LinkedIn

Intersurface Dynamics specializes in producing application-specific process chemicals for various high-volume manufacturing processes in multiple industries such as semiconductors, precision optics, ceramics, and flat panels.


10. Dark Field Technologies

  • Website: darkfield.com
  • Headquarters: Shelton, Connecticut, United States
  • Founded: 1997
  • Headcount: 11-50
  • LinkedIn

Dark Field Technologies specializes in automatic defect inspection and detection systems using its unique and powerful technologies. They offer tabletop inspection systems for pilot lines, labs, and R&D operations, which can be later repurposed for production. They also provide contract inspection services.


11. Zolab

  • Website: zolab.com
  • Headquarters: Norwalk, Connecticut, United States
  • Founded: 2015
  • Headcount: 51-200
  • LinkedIn

Zolab.com is a website that is currently under construction and its services are yet to be determined.


12. AMS Inc.

  • Website: amsmotion.com
  • Headquarters: Cromwell, Connecticut, United States
  • Founded: 1993
  • Headcount: 1-10
  • LinkedIn

Applied Motion Solutions (AMS) provides solutions for a variety of products, such as motors, drives, controls, computers, mechanical actuators and systems. AMS is a sales leader in the high tech Motion and Industrial Control Industry in the Northeast USA. For more than 25 years AMS has represented leading manufacturers of a wide range of Motors Products, Drives, Controls, Power Quality, PC's, Mechanical Actuators, Components and Systems. Our experienced sales team of EE & ME Engineers utilizes a consultative sales approach to help customers find the right solution. We have you covered from Maryland to Maine for your Motor and Motion Control needs.


13. Straton Industries

  • Website: straton.com
  • Headquarters: Stratford, Connecticut, United States
  • Founded: 1961
  • Headcount: 51-200
  • LinkedIn

Straton Industries is a precision manufacturing company that provides machining components, assemblies, and engineering services. They specialize in ceramic machining, grinding, CNC milling, CNC long bed lathe, compression fitting, wire sinker EDM, and welding and fabrication. They also offer quality inspection services and are FAA repair station certified.


14. Birk Manufacturing, Inc.

  • Website: birkmfg.com
  • Headquarters: East Lyme, Connecticut, United States
  • Founded: 1989
  • Headcount: 51-200
  • LinkedIn

Birk Manufacturing is a company that specializes in customized sensor solutions. They offer a wide range of products including mica heating elements, resistance temperature sensors, high temperature polyimide heaters, and flexible heaters.


15. COMET Technologies USA, Inc.

  • Website: comet-pct.com
  • Headquarters: Shelton, Connecticut, United States
  • Founded: 1992
  • Headcount: 51-200
  • LinkedIn

COMET is a global innovation partner offering high-value RF solutions for the semiconductor industry. With a reputation for quality and reliability, our products have been trusted worldwide since 1965. We leverage our extensive business experience and technical expertise to develop new products that give our customers a competitive advantage.


16. Ensinger Precision Components, Inc.

Ensinger Precision Components is a plastic manufacturing company that uses high-performance thermoplastics to design and manufacture solutions for various industries. They offer injection molding, CNC machining, and other fabrication services to exceed customer demands in aerospace, defense, industrial, fluidics, medical, food processing, oil & gas, and semiconductor sectors.


17. Alliance Technologies

Alliance Technologies is a business consulting firm that offers solutions to accelerate growth and expansion for companies looking to enter or operate in the Americas market.


18. Convergent Technologies

Convergent Technologies provides engineering and prototype development services to high-technology manufacturing companies. We focus on designing and developing prototypes of specialized measuring machines for precision manufacturing, semiconductor, optics and nano-technology companies.


19. Beta Squared Lithography, Inc.

Beta Squared Lithography, Inc. provides lithography equipment solutions to its clients. Its products include customized solutions for mainstream lithography equipment, and full-service repair facilities for repairable parts of Micralign™. The company is focused on pursuing cost-effective designs, and reducing the cost of ownership of its customers.


Want to find more semiconductor manufacturing companies?


If you want to find more companies that provide a diverse range of innovative semiconductor products and services you can do so with Inven. This list was built with Inven and there are hundreds of companies like these globally.


With Inven you'll also get to know the company's:


  • Ownership: Which of these are private equity backed? Which are family-owned?
  • Contact data: Who are the owners and CEO's? What are their emails and phone numbers?
  • Financials: How do these companies perform financially? What are their revenues and profit margins?

...and a lot more!