What Clas-SiC Wafer Fab does

Clas-SiC Wafer Fab Ltd is a privately held specialty semiconductor foundry founded in 2017 and headquartered in Lochgelly, Scotland. The company operates the world's first dedicated open foundry for Silicon Carbide (SiC) power semiconductors, processing 150mm SiC wafers through JBS/MPS diode and MOSFET flows within a custom-built ISO Class 5 cleanroom. Its product portfolio centers on reliability-proven Process Design Kits (PDKs) for 1200V, 1700V, and 3300V planar MOSFETs and JBS/MPS diodes, complemented by a library of off-the-shelf Process Module IP spanning implant hard mask, carbon cap anneal, gate dielectric, ohmic contacts, Schottky contact, power metal, and passivation. The company supports customers from prototyping through low-to-medium volume production, then facilitates transfer to high-volume foundry partners, with over 200 man-years of SiC processing expertise cited as a core asset.

Clas-SiC serves enterprise customers across six primary verticals: electric vehicles and automotive, renewable energy, defense, rail, aviation, and HVAC. The business model combines professional foundry services (wafer fabrication, prototyping, individual process capabilities) with technology licensing and transfer of PDKs and process modules. Pricing is quote-based with multi-year contracts, and customer acquisition is sales-led via direct project enquiries through phone, email, and the company website, supplemented by industry conference presence (e.g., PCIM Asia). The company holds ISO 9001 quality certification, won the NMI Manufacturing Site of the Year award in December 2022, and employs over 50 staff — the majority characterized as among the most highly skilled SiC processing engineers globally.

Strategically, Clas-SiC is in an active expansion phase. In February 2025, the company raised approximately $15.1M led by Archean Chemical Industries, and in November 2025 entered a flagship technology partnership with Archean's subsidiary SiCSem to establish India's first commercial compound semiconductor fabrication facility in Bhubaneswar, Odisha, with combined project investment of approximately ₹2,067 crore. The board includes Executive Chairman Carl Johnson (founder of II-VI Incorporated), CEO Jen Walls (30+ years semiconductor experience), CTO David Clark (24+ years SiC process integration, joint inventor on one SiC patent with three pending), CFO Scott Forrest, and Non-executive Director Ranjit Pendurthi (CEO of Archean Chemical Industries), reflecting a deliberate blend of deep SiC process expertise and capital partner alignment for international scaling.

Name

Clas-SiC Wafer Fab

Legal name

Clas-SiC Wafer Fab Ltd

Website

https://clas-sic.com

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

51–100 employees

Short description

Clas-SiC Wafer Fab is the world's first dedicated open foundry for Silicon Carbide power semiconductors, processing 150mm SiC wafers and offering reliability-proven Process Design Kits and process module services to enterprise customers across EV, renewable energy, defense, rail, aviation, and HVAC sectors.

Ownership category

akta.pro rank

Product category

Semiconductor Foundry Services

NAICS

Semiconductor and Other Electronic Component Manufacturing (3344)

SIC

Semiconductors & Related Devices (3674)

akta.pro primary industry

R&D / Prototyping & MPW Shuttle Foundries (HDAHACAI)

akta.pro secondary industries

Foundry Platform & Design Enablement Services (PDK/DFM/Process Qualification) (HDAHACAJ), Compound Semiconductor Wafers & Substrates (SiC/GaN/GaAs/InP/Sapphire) (HDAHAGAB)

Keywords

• Silicon carbide foundry
• Wafer fabrication services
• Power semiconductor manufacturing
• Process design kits
• MOSFET fabrication

Headquarters

HQ city

Lochgelly

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Infrastructure, Technology or R&D, Operations, Supply Chain, Marketing or Sales

Revenue model

1. SiC Wafer Fabrication Services: Dedicated Silicon Carbide wafer foundry providing prototyping, low to medium rate production, and sub-contract process services. The company supports customers from concept to prototype to manufacture, with services including full device processing and individual process module capabilities. They actively facilitate transfer to high-volume foundry partners after initial production phases.
2. Process Module Solutions: Individual process module solutions as well as partial processing of wafers (e.g., laser scribe, ion implant, carbon cap anneal). Process modules are available off-the-shelf from their IP library.
3. Technology Licensing and Transfer: Licensing of Process Design Kits and technology for SiC device manufacturing to partners, including technology transfer to high-volume foundry partners.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Clas-SiC Wafer Fab operates the world's first dedicated open foundry for Silicon Carbide (SiC) power semiconductors, providing wafer fabrication services that span prototyping, low to medium rate production, and sub-contract process work on 150mm SiC wafers. The company delivers JBS/MPS diode and MOSFET flows backed by reliability-proven Process Design Kits (PDKs) and an off-the-shelf Process Module IP library, enabling customers to accelerate R&D cycles and transition designs from concept to prototype to manufacture. After initial production phases, Clas-SiC actively facilitates technology transfer to high-volume foundry partners.

Product overview

Clas-SiC Wafer Fab operates as the world's first dedicated open foundry for Silicon Carbide (SiC) power semiconductors, offering a unified platform combining Process Design Kits (PDKs) for 1200V, 1700V, and 3300V MOSFETs and JBS/MPS diodes, alongside individual process module solutions and standalone process capabilities. The company supports customers from prototype through low-to-medium production volumes, with a library of over 200 man-years of SiC processing expertise and 'off-the-shelf' Process Module IP to minimize technical risk. The portfolio includes reliability-proven PDKs, process module offerings (such as implant hard mask, carbon cap anneal, gate dielectric, ohmic contacts, power metal, and passivation), and individual fabrication capabilities spanning lithography, etching, deposition, annealing, and testing for 150mm SiC wafers.

Differentiator

Problem solved

Functional benefit

Products and services

• 1200V MOSFET Process Design Kit Reliability-proven Process Design Kit for 1200V planar SiC MOSFETs, providing customers with a qualified process flow to accelerate device development and manufacturing readiness for medium-voltage power electronics applications.
• 1700V MOSFET Process Design Kit Reliability-proven Process Design Kit for 1700V planar SiC MOSFETs, supporting higher-voltage power electronics applications such as industrial drives and renewable energy inverters.
• 3300V MOSFET Process Design Kit Reliability-proven Process Design Kit for 3300V planar SiC MOSFETs, addressing ultra-high-voltage device applications such as grid-tied renewable converters and traction systems.
• JBS/MPS Diode Design Kit Reliability-proven Process Design Kit for Junction Barrier Schottky (JBS) and Merged PiN-Schottky (MPS) SiC diodes, enabling fast prototyping and production of SiC diode devices for power conversion applications.
• Silicon Carbide Wafer Fabrication Services Dedicated open foundry providing Silicon Carbide wafer fabrication, supporting prototyping, low-to-medium rate production, accelerated R&D cycle times, and sub-contract process services for SiC power semiconductor devices on 150mm wafers.
• Prototype Fabrication Services Fast development and prototyping services that enable customers to transition from lab to fab, including sample seeding through medium volume production of new SiC device designs.
• Process Module Solutions Individual process module offerings available off-the-shelf from Clas-SiC's IP library, including alignment target, implant hard mask, carbon cap implant anneal, MOSFET gate dielectric and gate polysilicon, backside and frontside ohmic contacts, Schottky contact, power metal, passivation, backside tri-metal, and wafer test modules.
• Individual Process Capabilities Standalone process services including laserscribe (Si and SiC capable), i-line photolithography down to 0.5um, plasma etch, oxidation furnaces up to 1300°C, LPCVD, ion implant up to 400keV (1.2MeV available), implant anneal up to 1750°C, PECVD, sputter, rapid thermal anneal, and automated wafer test up to 10kV reverse and 500A forward.

Quantifiable outcome

• Time to market advantage for SiC device development through accelerated R&D cycles
• +1 more outcomes

Named customers6 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered flagship and core.

• SiCSem Private LimitedflagshipTechnology or Integration · 1 November 2025UK-based Clas-SiC Wafer Fab Ltd partnered with India's SiCSem Pvt. Ltd (a subsidiary of Archean Chemical Industries Ltd.) to establish India's first commercial compound semiconductor fabrication facility in Bhubaneswar, Odisha. Clas-SiC serves as the technology partner providing SiC fabrication technology and expertise. The groundbreaking ceremony took place on November 1, 2025, with an initial investment of approximately ₹2,067 crore. This partnership represents a significant milestone in India's semiconductor mission and positions India as a viable 'China+1' alternative in the SiC supply chain.
• Archean Chemical Industries Ltd.coreStrategic or Co-development Partner · 1 November 2025Archean Chemical Industries Ltd. is the parent company of SiCSem Private Limited, which partnered with Clas-SiC for India's first commercial SiC semiconductor fabrication facility. The CEO and Managing Director of Archean, Ranjit Pendurthi, serves as a Non-executive Director on Clas-SiC's Board, creating a direct governance link between the two companies and enabling close strategic collaboration on the India semiconductor initiative.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• X-FAB Silicon Foundries: X-FAB operates as an open specialty foundry serving analog/mixed-signal and high-voltage applications. It is the closest direct peer to Clas-SiC's open-foundry model, offering third-party wafer fabrication services for fabless customers across niche process technologies.
• Wolfspeed: Wolfspeed is the leading pure-play Silicon Carbide power device manufacturer with captive SiC fabs. It is directly comparable to Clas-SiC as a fellow SiC-focused power semiconductor company, though vertically integrated rather than open-foundry.

Broad incumbents

• Tower Semiconductor: Tower Semiconductor is an established specialty foundry serving analog, RF, and power applications. It operates at larger scale than Clas-SiC across multiple process platforms, including high-voltage, representing the scaled-up incumbent version of Clas-SiC's specialty foundry model.
• SK Siltron CSS: SK Siltron CSS (formerly DuPont's SiC wafer unit) manufactures 150mm and 200mm Silicon Carbide wafers and is investing in SiC epitaxy. It is comparable as a key supplier into the same SiC power semiconductor value chain that Clas-SiC serves downstream.
• Coherent Corp (formerly II-VI): Coherent (formerly II-VI Incorporated, founded by Clas-SiC Chairman Carl Johnson) is a major compound semiconductor manufacturer with broad SiC and GaN capabilities. It represents the scaled incumbent in the compound semiconductor space and a direct strategic connection through Carl Johnson.
• STMicroelectronics: STMicroelectronics is one of the largest merchant suppliers of Silicon Carbide MOSFETs and diodes for EV and industrial markets, with captive SiC fabs in Catania and Norsterovec. It competes with Clas-SiC's downstream customers and is a benchmark for the SiC IDM model.
• ROHM Semiconductor: ROHM is a Japanese power semiconductor leader with substantial Silicon Carbide MOSFET and Schottky diode portfolios, including vertical SiC fab capability. It competes with the end-customer products enabled by Clas-SiC's foundry services in EV, industrial, and renewable energy.
• onsemi (ON Semiconductor): onsemi is a major power semiconductor supplier that has invested heavily in Silicon Carbide capacity, including the acquisition of GT Advanced Technologies. It is a direct competitor to Clas-SiC's downstream customers across EV and industrial SiC applications.

Regional players

• Vanguard International Semiconductor (VIS): VIS is a Taiwan-based specialty foundry offering analog, power, and high-voltage CMOS processes. It represents a regional incumbent in the specialty foundry space comparable to Clas-SiC's open-foundry positioning, with primary focus on the Asia market.
• Episil-Precision (SiC foundry services): Episil is a Taiwan-based foundry offering specialty processes including Silicon Carbide epitaxy and device fabrication services. Comparable as an emerging SiC foundry peer serving Asia-based customers, though with broader compound semiconductor scope.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/clas-sic-wafer-fab-ltd

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Clas-SiC Wafer Fab