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Plessey Semiconductors Ltd Tech Stack

GaN-on-Silicon microLED display manufacturer for AR/MR and wearables

Appliances, Electrical, and Electronics Manufacturing Plymouth, Devon 201–500 employees Founded 2010 Privately Held

Plessey manufactures microLED displays using a proprietary GaN-on-Silicon platform, operating 150mm and 200mm wafer fabs in Plymouth. The tech stack (MATLAB, COMSOL, TestStand, Python, Teradyne UltraFlex) and active projects reveal a process-engineering focus: photolithography yield, repeatability studies, test automation, and measurement characterization dominate near-term work. Senior-heavy hiring (7 of 13 roles) concentrated in engineering signals push toward high-volume manufacturing maturity.

Tech Stack 17 technologies

Core StackPython MATLAB C++ Microsoft Office SharePoint Teradyne UltraFlex JMP Microsoft Project COMSOL LabVIEW TestStand C/C++ STM32 Zephyr Embedded Linux USB UART

What Plessey Semiconductors Ltd Is Building

◆Challenges

Scaling microled production to high-volume
Equipment reliability
Improving lithography yield and repeatability
Transferring test solutions to high volume manufacturing
Improving cashflow visibility
Reducing fx exposure
Enhancing financial discipline
Automating reliability testing
Analyzing large datasets

▲Active Projects

Photolithography development for next generation microled devices
Establishing spc systems and dashboards
Process development roadmap
New tooling development
Optimise test programs for complex devices
Perform repeatability and reproducibility studies
Define test program development procedures
Novel measurement methods for qw micro-led structures
Techniques to characterise micro-led operation
Measurement and modelling for new technologies

Hiring Activity

Accelerating15 roles · 8 in 30d

Department

Engineering

8

Finance

1

Manufacturing

1

Marketing

1

Product

1

Seniority

Senior

7

Principal

3

Mid

2

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About Plessey Semiconductors Ltd

Plessey is a semiconductor manufacturer developing microLED display technology on a GaN-on-Silicon platform. The company operates wafer-scale processing, photonic characterization, and assembly facilities in Plymouth, England. Products target augmented reality, mixed reality, wearable devices, and optical instruments. Current engineering efforts center on scaling production capacity and improving manufacturing yield and reliability — areas where the company faces constraints in process maturity and equipment performance.

HeadquartersPlymouth, Devon

Company Size201–500 employees

Founded2010

Hiring MarketsUnited Kingdom

Frequently Asked Questions

What is Plessey Semiconductors' tech stack?

Design and process control tools include MATLAB, COMSOL, Python, JMP, LabVIEW, and TestStand. Manufacturing test equipment includes Teradyne UltraFlex. Embedded systems use C++, STM32, Zephyr, and Embedded Linux.

What is Plessey working on?

Core projects include photolithography development for microLED yield improvement, establishing statistical process control systems, test program optimization, and novel measurement methods for characterizing microLED structures at scale.