Wolfspeed
An American wide-bandgap semiconductor company specializing in silicon carbide materials, wafers, power devices, and modules.
Last updated August 31, 2026
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Overview
Wolfspeed is an American semiconductor company focused on silicon carbide, or SiC, a wide-bandgap material used to make power electronics that can operate at higher voltages and temperatures and with lower switching losses than many conventional silicon-based devices. Its products are designed for electric-vehicle powertrains, charging infrastructure, renewable-energy generation, battery storage, industrial power conversion, power supplies, transportation systems, aerospace applications, and selected wireless and radio-frequency systems. The company was founded in Durham, North Carolina, in July 1987 as Cree Research by a group of researchers associated with North Carolina State University. The founders were interested in using silicon carbide's electrical and thermal characteristics to create more capable semiconductor components. Early work covered both semiconductor materials and lighting. In 1989, the company introduced a blue light-emitting diode, a development that helped enable large full-color displays and billboards. In 1991, it released a commercial silicon carbide wafer, establishing an early position in a technology that later became central to high-efficiency power conversion. Cree became a public company in 1993 and adopted the name Cree, Inc. in 1999. For much of its history, the business combined semiconductor activities with LED lighting and lighting products. It expanded through acquisitions, including Ruud Lighting in 2011, while developing LED components, lighting products, radio-frequency devices, power electronics, wafers, and epitaxial materials. A proposed 2016 sale of its Wolfspeed RF and power-electronics division to Infineon Technologies was terminated in 2017 after regulatory concerns. Cree subsequently acquired Infineon's RF Power Business in 2018, but later sold its lighting operations, first the Lighting Products division in 2019 and then the Cree LED business in 2021. The strategic separation from lighting enabled the company to concentrate on silicon carbide materials and power semiconductors. In October 2021, Cree changed its name to Wolfspeed, taking the name of the business that had represented its power and RF semiconductor activities. The company has invested heavily in manufacturing capacity, including a large silicon carbide fabrication facility in Marcy, New York, which opened in 2022. It also pursued a major European plant in Ensdorf, Saarland, Germany, with proposed participation from ZF Friedrichshafen. That project was delayed and later placed on indefinite hold amid weaker demand and changing investment conditions; ZF subsequently withdrew from the project. Wolfspeed's manufacturing strategy includes the development and commercialization of 200-millimeter silicon carbide wafers and epitaxial materials. Larger wafers are intended to improve manufacturing economics and support higher-volume production of power devices. The business has nevertheless faced substantial financial and operational pressure, including slower-than-expected demand, high capital requirements, project delays, debt burdens, workplace-safety scrutiny, and restructuring activity. In 2025, the company announced a transaction involving Apollo Global Management and a prepackaged Chapter 11 restructuring designed to reduce debt and provide financing. Wolfspeed remains associated with the long-term growth of SiC power electronics, particularly in electric vehicles and energy infrastructure, but its future depends on demand growth, manufacturing execution, capital access, and the outcome of its restructuring.
History
Wolfspeed began as Cree Research in Durham, North Carolina, in July 1987. Its founders, including Neal Hunter, Thomas Coleman, John Edmond, Eric Hunter, John Palmour, and Calvin Carter, were connected with North Carolina State University and were investigating the use of silicon carbide for semiconductor and lighting applications. Their technical work addressed the material's ability to withstand higher temperatures, voltages, and power levels than conventional semiconductor materials. The early company pursued both SiC materials and light-emitting diodes. In 1989 it introduced a blue LED, a development that contributed to the emergence of large full-color video displays and billboards. In 1991, it commercialized a silicon carbide wafer. Cree completed an initial public offering in 1993 and changed its name from Cree Research to Cree, Inc. in 1999. During the 2000s and 2010s, Cree operated across several related technology markets. It expanded its lighting business and acquired Ruud Lighting in 2011. It also developed silicon carbide power devices, radio-frequency products, wafers, and epitaxial materials. A proposed 2016 acquisition of its Wolfspeed RF and power-electronics unit by Infineon Technologies was terminated in February 2017 after regulatory concerns. In 2018, Cree acquired Infineon's RF Power Business. The company later divested its lighting operations, selling the Lighting Products division to Ideal Industries in 2019 and Cree LED to SMART Global Holdings in 2021. The divestitures marked a major strategic shift toward silicon carbide materials and power semiconductors. In October 2021, Cree adopted the Wolfspeed name. The renamed company invested in larger-scale SiC production, including a facility in Marcy, New York, that opened in April 2022. It also planned a European factory in Ensdorf, Germany, on the site of a former coal plant, with proposed investment from ZF Friedrichshafen and support connected with European semiconductor policy. The German project was delayed, placed on indefinite hold in 2024, and abandoned by ZF as demand conditions weakened. Wolfspeed has developed 200-millimeter silicon carbide wafer and epitaxial-material capabilities to support greater production scale. Its device portfolio includes SiC MOSFETs, Schottky diodes, power modules, and other components used in electric vehicles, renewable-energy systems, battery storage, industrial equipment, charging systems, power supplies, and transportation applications. The company has also faced operational and financial difficulties. A 2022 fatal workplace electrocution led to state scrutiny, while labor investigations identified multiple safety violations over the following years. High capital expenditure, weaker demand, manufacturing challenges, project delays, and substantial debt contributed to a severe financial restructuring. In 2025, Wolfspeed announced an Apollo-backed prepackaged Chapter 11 transaction and subsequently filed for bankruptcy protection. The restructuring was intended to reduce debt and provide financing while preserving the company's core silicon carbide business.
- 2025
Chapter 11 restructuring begins
[1]Wolfspeed announces and files for a prepackaged Chapter 11 restructuring supported by lenders and Apollo Global Management.
- 2022
Marcy facility opens
[1]Wolfspeed opens its major silicon carbide facility in Marcy, New York.
- 2021
Corporate name changes to Wolfspeed
[1]The company adopts Wolfspeed as its corporate identity while concentrating on SiC and power semiconductors.
- 2018
Infineon RF Power Business acquired
[1]Cree acquires Infineon's RF Power Business.
- 2011
Ruud Lighting acquired
[1]Cree acquires Ruud Lighting as it expands its LED lighting activities.
- 1993
Initial public offering
[1]Cree becomes a public company.
- 1991
Commercial SiC wafer released
[1]The company releases a commercial silicon carbide wafer.
- 1989
Blue LED introduced
[1]Cree introduces a blue LED that supports later applications in full-color displays and lighting.
- 1987
Cree Research is founded
[1]The company is established in Durham, North Carolina, to commercialize silicon carbide materials for semiconductor and lighting applications.
Products and positioning
A specialized wide-bandgap semiconductor supplier positioned around high-efficiency silicon carbide materials and power devices for demanding transportation, energy, industrial, and power-conversion applications.
Semiconductor materials · 1991
Silicon carbide wafers
Wolfspeed produces silicon carbide substrates used as the foundational material for power semiconductor manufacturing. Its portfolio includes larger-format wafers intended to improve fab utilization and manufacturing economics. The company has developed 200-millimeter SiC wafer technology for higher-volume production serving automotive, energy, and industrial customers.
Semiconductor materials
Silicon carbide epitaxial materials
Epitaxial layers are deposited on SiC substrates to create the electrically controlled structures required by power devices. Wolfspeed supplies epitaxial materials and wafers for applications requiring high voltage, high temperature, efficient switching, and reliable power conversion.
Power semiconductors
SiC MOSFETs
Silicon carbide MOSFETs are switching devices designed for high-efficiency power conversion. They are used in electric-vehicle inverters, charging equipment, renewable-energy systems, industrial motor drives, power supplies, and other applications where reduced losses and higher operating temperatures can improve system performance.
Power semiconductors
SiC Schottky diodes
Wolfspeed's silicon carbide Schottky diodes are high-frequency power rectifiers intended to reduce switching losses and improve efficiency. They are deployed in power supplies, solar inverters, electric-vehicle charging systems, industrial converters, and other high-voltage power-management equipment.
Power modules
Silicon carbide power modules
Power modules combine multiple SiC switching and rectification components in packaged assemblies. They are intended to simplify system design for automotive traction inverters, industrial drives, renewable-energy converters, energy-storage equipment, and high-power charging infrastructure.
Radio-frequency semiconductors
RF power devices
The former Cree and Wolfspeed businesses developed RF power semiconductor products for wireless and radio-frequency systems. Wolfspeed later agreed to sell its RF business to MACOM as part of its strategy to focus more narrowly on silicon carbide power technology.
Controversies
2022
Fatal electrocution and workplace-safety scrutiny
A facilities electrician died after being electrocuted at Wolfspeed's Research Triangle Park site in Durham, North Carolina. The incident prompted a state investigation and broader scrutiny of the company's safety record. State labor investigations identified 17 workplace-safety violations between 2012 and 2023, including six classified as serious.
Brand decisions
2025
Adopt a prepackaged Chapter 11 restructuringOtherBackground
Lower-than-expected demand, heavy investment requirements, and a large debt load created significant liquidity and continuity risks.
Action taken
Wolfspeed announced an Apollo-backed transaction, lender support, new financing, and a prepackaged Chapter 11 plan intended to reduce debt and preserve the operating business.
Aftermath
The company filed for Chapter 11 protection on June 30, 2025, beginning the formal restructuring process.
Debt targeted for elimination. $4.6 billion (2025 restructuring plan)
2023
Pursue European SiC manufacturingStrategyBackground
Wolfspeed aimed to add European production capacity and serve regional automotive and industrial semiconductor demand.
Action taken
The company announced a planned factory in Ensdorf, Saarland, Germany, with proposed participation from ZF Friedrichshafen.
Aftermath
The project was delayed and then placed on indefinite hold in 2024 because of weak demand and investment concerns; ZF later ceased participating.
2021
Concentrate the company on silicon carbideStrategyBackground
After years of operating lighting and semiconductor businesses, the company determined that its long-term identity should center on silicon carbide materials and power devices.
Action taken
It sold the Cree LED business, completed the separation of lighting activities, and changed its corporate name from Cree to Wolfspeed.
Aftermath
Wolfspeed emerged as a more focused wide-bandgap semiconductor company.
2019
Invest in large-scale silicon carbide manufacturingStrategyBackground
The company sought to expand production capacity for silicon carbide materials and devices as demand developed in automotive, energy, and industrial power applications.
Action taken
Wolfspeed announced a major investment in a new silicon carbide facility in Marcy, New York.
Aftermath
The facility opened in 2022 and became a central part of the company's manufacturing strategy.
Recent events
- Unconfirmed
Wolfspeed secures conditional $1.5 billion U.S. Defense Department loan[3]
Reported:
Wolfspeed secured a conditional $1.5 billion loan, described as a 30-year financing commitment from the U.S. Department of Defense. The money will support domestic production, and under the proposed terms the Pentagon would receive warrants for up to 7.5% of the company. Wolfspeed shares surged more than 15% premarket.
- Unconfirmed
Wolfspeed starts production of fifth-generation SiC MOSFET at Mohawk Valley fab[4]
Wolfspeed disclosed that its fifth-generation SiC MOSFET has entered production at its Mohawk Valley fab in New York.
Wolfspeed introduces four X-band GaN-on-SiC MMIC devices[5]
Cree | Wolfspeed introduced four multi-stage gallium nitride on silicon carbide monolithic microwave integrated circuit devices for X-band phased-array applications.
CREE announces planned sale of LED business[6]
Reported:
CREE announced that it planned to sell its LED business to SMART Global Holdings for US$300 million.
Cree lowers fiscal third-quarter 2020 outlook[7]
Cree announced preliminary fiscal third-quarter 2020 results and said revenue was expected to be about $216 million, below its prior guidance of $221–229 million; it also expected a non-GAAP net loss of $15–17 million, compared with prior guidance of $10–16 million. The company cited a greater-than-anticipated impact from the COVID-19 pandemic.
Cree introduces Wolfspeed 650V SiC MOSFETs[8]
Reported:
Cree introduced a new family of Wolfspeed 650V silicon carbide MOSFETs, designed for applications including electric vehicles, industrial uses, data centers, and energy storage.
Sources9 sources
- 1Wolfspeeden.wikipedia.org
- 2Wolfspeed official websitewolfspeed.com
- 3Wolfspeed 获得美国国防部15亿美元有条件贷款cnbc.com
- 4Wolfspeed第五代SiC MOSFET在纽约Mohawk Valley工厂投产eeo.com.cn
- 5Wolfspeed推出四款X波段GaN-on-SiC MMIC器件semiconductor-today.com
- 6CREE宣布拟出售LED业务chinatimes.com
- 7Cree下调2020财年第三季度业绩展望semiconductor-today.com
- 8Cree推出Wolfspeed 650V碳化硅MOSFETinsideevs.com
- 9科锐推出新型650V MOSFET，提供业界领先效率，助力新一代电动汽车、数据中心、太阳能应用创新tech.sina.com.cn
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