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Regional cluster

The Southampton and South East semiconductor cluster

A research-led cluster built on silicon photonics and optical fibre science at the University of Southampton, with a smaller company base weighted towards design, detectors and process equipment.

What is the Southampton semiconductor cluster known for?

The Semiconductor.co.uk industry map currently holds 9 companies in this cluster — 5 dedicated semiconductor businesses and 4 diversified companies with semiconductor capability alongside other activity, across 9 capabilities. The count is a count of mapped records rather than an estimate of every company in the region.

Silicon photonics and nanofabrication research. The University of Southampton's Zepler Institute combines optical fibre and photonics research with a large cleanroom complex, and the university has been the anchor for the region's semiconductor identity rather than any single manufacturer.

The company base here is smaller than in Scotland, Cambridge or South Wales. Our index records a modest number of published companies in this geography, concentrated in analogue and mixed-signal design, ASIC design services, detector and imaging manufacture, and semiconductor process equipment. Many companies with South East addresses sit closer to the Thames Valley or the coastal corridor and are recorded under those geographies instead.

9
Companies mapped in this cluster
All records fully verified
5
Dedicated semiconductor businesses
Semiconductors are the core activity
4
Diversified companies
Semiconductor capability alongside other work
9
Distinct primary capabilities
From the controlled capability vocabulary

At a glance

  • Silicon photonics and optical fibre research at the University of Southampton
  • Large university cleanroom complex supporting device-scale fabrication
  • Detector and imaging device manufacture in Southampton
  • Analogue, mixed-signal and ASIC design services
  • A small published company base relative to the larger UK clusters
  • Research strength ahead of commercial scale

What this cluster specialises in

Silicon photonics and integrated optics

Research and prototype work on photonic devices fabricated in silicon and related materials, with open-access foundry-style processing.

Detectors and imaging devices

Infrared and specialist imaging detector design and manufacture for defence, space and scientific instruments.

Analogue, mixed-signal and ASIC design

Fabless and design-services companies producing custom integrated circuits for industrial and communications customers.

Process and manufacturing equipment

Equipment and subsystems supplied into wafer processing and device manufacture elsewhere in the UK and overseas.

Capabilities recorded here

  • Advanced Packaging1
  • Analogue / Mixed-Signal Design1
  • ASIC Design Services1
  • Detectors / Imaging Devices1
  • EDA / Design Automation1
  • Semiconductor IP1
  • Semiconductor Manufacturing Equipment1
  • Semiconductor Test1
  • Wafers / Substrates1

Companies recorded in this cluster

Drawn live from the central company index and listed alphabetically, with no ranking or paid placement. A cluster is only recorded where the operating location genuinely sits inside the cluster geography, so companies elsewhere in the same region are not listed here.

Showing 9 of 9

  • 284 Technologies

    Diversified

    Southampton-based supplier of new and refurbished semiconductor process and metrology equipment, including etch, deposition and thermal processing systems from named original equipment manufacturers, serving semiconductor, MEMS and emerging-technology customers.

    Semiconductor Manufacturing Equipment · Southampton

    Website

  • AccelerComm

    Dedicated

    Southampton developer of 5G physical-layer and forward-error-correction IP for satellite and terrestrial networks.

    Semiconductor IP · Southampton

    Website

  • Aquarius Test Engineering

    Dedicated

    Hampshire company offering semiconductor test development, tester access and small-batch production test for fabless power, analogue and mixed-signal chip makers.

    Semiconductor Test · Lee-on-the-Solent

    Website

  • Custom Interconnect (CIL)

    Diversified

    Hampshire electronics manufacturing company offering advanced semiconductor packaging, die attach, wire bonding and module assembly services.

    Advanced Packaging · Andover

    Website

  • HiLight Semiconductor

    Dedicated

    Southampton fabless designer of analogue and mixed-signal CMOS integrated circuits for high-speed optical communications, including transimpedance amplifiers, laser and VCSEL drivers and transceiver chipsets.

    Analogue / Mixed-Signal Design · Southampton

    Website

  • Inseto

    Diversified

    Hampshire supplier of semiconductor wafers, substrates and assembly and test equipment, with some in-house wafer processing such as dicing, thinning and coating.

    Wafers / Substrates · Andover

    Website

  • Leonardo UK (Southampton detectors)

    Diversified

    Southampton facility growing mercury cadmium telluride material and manufacturing cooled infrared detector and avalanche photodiode arrays for defence, space and scientific instruments, part of Leonardo's electronics business.

    Detectors / Imaging Devices · Southampton

    UK operation of Leonardo S.p.A.

    Website

  • NextGen Chip Design

    Dedicated

    Winchester company providing specialist physical design services for integrated circuits, including floorplanning, place and route and layout implementation for digital blocks, IP and full systems on chip at advanced nodes.

    ASIC Design Services · Winchester

    Website

  • Siemens EDA UK

    Dedicated

    UK subsidiary of Siemens EDA, the IC design and verification software business, registered in Farnborough.

    EDA / Design Automation · Farnborough

    UK operation of Siemens

    Website

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Manufacturing and fabrication capability

Fabrication in this cluster is research and prototype scale. The University of Southampton's cleanroom complex, run as part of the Zepler Institute, provides lithography, etching, deposition and optical fibre fabrication, and is used by external companies as well as academic groups.

Industrial production is specialised rather than high volume. Detector and imaging manufacture in Southampton is the most substantial company-scale activity recorded in our index for this geography. We do not identify a volume silicon wafer fabrication plant in the region and none is claimed here.

Universities and research

The University of Southampton is the dominant research institution, with the Zepler Institute covering photonics, optoelectronics, nanoelectronics and optical fibre. The 2026 Government sector study identifies the Southampton geography specifically for silicon photonics and nanofabrication infrastructure rather than for a broad manufacturing base.

Other South East universities contribute in adjacent fields, but we have not identified comparable dedicated semiconductor fabrication facilities elsewhere in the region, so none are listed.

Investment and programmes

The 2023 National Semiconductor Strategy prioritised design, intellectual property, research and compound semiconductors, and photonics research infrastructure in this cluster has been funded largely through research council and university programmes rather than through a single regional manufacturing commitment.

The UK Semiconductor Centre announced in the 2025 Digital and Technology Sector Plan is intended to act as a national point of contact for scale-up and international engagement, which is the route through which companies in smaller clusters such as this one are expected to engage nationally.

Cluster and industry organisations

Zepler Institute for Photonics and Nanoelectronics

University of Southampton research institute and cleanroom operator, and the main point of access to regional fabrication capability.

UK Semiconductor Centre

National coordination point for scale-up support and international engagement, mobilised by the Compound Semiconductor Applications Catapult.

How this cluster fits the UK sector

Southampton is recognised in the 2026 sector study as a research-led cluster: internationally significant in silicon photonics and nanofabrication, but with a business base weighted towards multinational design and device activity rather than local volume manufacture.

Its published company count in our index is therefore much smaller than its research reputation would suggest, and should be read as a measure of recorded companies rather than of regional importance.

The 2026 Government sector study identifies 12 regional semiconductor clusters across the UK. The national clusters overview sets out all twelve, each with its own resource and live company count.

Sources

Facilities, programmes and funding described above are drawn from the following first-party and institutional sources. Figures published by a cluster organisation or company are attributed to them in the text rather than presented as official statistics.

Companies in this cluster can take Company Membership for sustained visibility, announcements, appointments and events. It has no effect on index records or status.

Based outside the UK? Make an international enquiry about Southampton / South East.

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Continue reading

All 12 UK semiconductor clusters

The national picture, region by region, from the 2026 sector study.

UK company index

Search every record by capability, region and cluster.

Investment and policy

Public programmes and private capital behind the sector.

Semiconductor glossary

Definitions for epitaxy, foundry, compound semiconductor and more.