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Rising demand for SiC chips: Bosch plans to acquire U.S. chipmaker TSI Semiconductors

Plans to invest 1.5 billion USD in strategically important semiconductor business for electromobility

  • Bosch chairman Dr. Stefan Hartung: “With this planned investment in the U.S., we are also increasing our semiconductor manufacturing, globally.”
  • Third pillar for semiconductor business: following Reutlingen and Dresden in Germany, Bosch will in the future also make chips in Roseville, California.
  • More chips: with the planned acquisition, Bosch will significantly expand its global portfolio of SiC semiconductors by the end of 2030.
  • Electric cars as the driving force: SiC chips enable greater range and more efficient recharging.
Athanassios Kaliudis

Athanassios Kaliudis

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Stuttgart, Germany – Bosch is expanding its semiconductor business with silicon carbide chips. The technology company plans to acquire assets of the U.S. chipmaker TSI Semiconductors, based in Roseville, California. With a workforce of 250, the company is a foundry for application-specific integrated circuits, or ASICs. Currently, it mainly develops and produces large volumes of chips on 200-millimeter silicon wafers for applications in the mobility, telecommunications, energy, and life sciences industries. Over the next years, Bosch intends to invest more than 1.5 billion USD in the Roseville site and convert the TSI Semiconductors manufacturing facilities to state-of-the-art processes. Starting in 2026, the first chips will be produced on 200-millimeter wafers based on the innovative material silicon carbide (SiC).

In this way, Bosch is systematically reinforcing its semiconductor business, and will have significantly extended its global portfolio of SiC chips by the end of 2030. Above all, the global boom and ramp-up of electromobility are resulting in huge demand for such special semiconductors. The full scope of the planned investment will be heavily dependent on federal funding opportunities available via the CHIPS and Science Act as well as economic development opportunities within the State of California. Bosch and TSI Semiconductors have reached an agreement to not to disclose any financial details of the transaction, which is subject to regulatory approval.

“With the acquisition of TSI Semiconductors, we are establishing manufacturing capacity for SiC chips in an important sales market while also increasing our semiconductor manufacturing, globally. The existing clean-room facilities and expert personnel in Roseville will allow us to manufacture SiC chips for electromobility on an even larger scale,” says Dr. Stefan Hartung, the chairman of the Bosch board of management. “The location in Roseville has existed since 1984. Over nearly 40 years, the U.S. company has built up vast expertise in semiconductor production. We will now be integrating this expertise into the Bosch semiconductor manufacturing network,” says Dr. Markus Heyn, member of the Bosch board of management and chairman of the Mobility Solutions business sector. “We are pleased to join a globally operating technology company with extensive semiconductor expertise. We are confident that our Roseville location will be a significant addition to Bosch’s SiC chipmaking operations,” says Oded Tal, CEO at TSI Semiconductors.

With the acquisition of TSI Semiconductors, we are establishing manufacturing capacity for SiC chips in an important sales market while also increasing our semiconductor manufacturing, globally. The existing clean-room facilities and expert personnel in Roseville will allow us to manufacture SiC chips for electromobility on an even larger scale,

says Dr. Stefan Hartung, the chairman of the Bosch board of management.

Acquisition of TSI Semiconductors creates new manufacturing capacity

The new location in Roseville will reinforce Bosch’s international semiconductor manufacturing network. Starting in 2026, following a retooling phase, first SiC chips will be produced on 200-millimeter wafers in a facility offering roughly 10,000 square meters of clean-room space. At an early stage, Bosch invested in the development and production of SiC chips. Since 2021, it has been using its own proprietary, highly complex processes to mass-produce them at its Reutlingen location near Stuttgart. In the future, Reutlingen will also produce them on 200-millimeters wafers. By the end of 2025, the company will have extended its clean-room space in Reutlingen from roughly 35,000 to more than 44,000 square meters. “SiC chips are a key component for electrified mobility. By extending our semiconductor operations internationally, we are strengthening our local presence in an important electric vehicle market,” Heyn says.

SiC chips are a key component for electrified mobility. By extending our semiconductor operations internationally, we are strengthening our local presence in an important electric vehicle market,

says Dr. Markus Heyn, member of the Bosch board of management and chairman of the Mobility Solutions business sector.

Demand for chips for the automotive industry remains high. By 2025, Bosch expects to have an average of 25 of its chips integrated in every new vehicle. The market for SiC chips is also continuing to grow fast – by 30 percent a year on average. The main drivers of this growth are the global boom and ramp-up of electromobility. In electric vehicles, SiC chips enable greater range and more efficient recharging, as they use up to 50 percent less energy. Installed in these vehicles’ power electronics, they ensure that a vehicle can drive a significantly longer distance on one battery charge – on average, the possible range is 6 percent greater than with silicon-based chips.

Systematic investments in pivotal semiconductor technology

Semiconductors are key to the success of all Bosch business areas. The company recognized the potential of this technology early on, and has been producing semiconductors for more than 60 years. Bosch is one of the few companies to have not only electronic and software expertise but also a profound understanding of microelectronics. It can combine this decisive competitive advantage with its strength in semiconductor manufacturing. The supplier of technology and services has been manufacturing semiconductors in Reutlingen since 1970. They are used both in the automotive sphere and in consumer electronics. Modern electronics in vehicles is also the basis for reducing traffic emissions, preventing road accidents, and efficient powertrains. Production at the Bosch wafer fab in Dresden (300-millimeter wafers) started in July 2021. At nearly one billion euros, the wafer fab is the biggest single investment in the company’s history.

In its wafer fabs in Reutlingen and Dresden, Bosch has invested more than 2.5 billion euros in total since 200-millimeter technology was introduced in 2010. On top of this, billions of euros have been invested in developing microelectronics. Independently of the investment now planned in the United States, the company announced in summer last year that it will be investing a further 3 billion euros in its semiconductor business in Europe, both as part of its investment planning and with the aid of the EU’s “Important Project of Common European Interest on Microelectronics and Communication Technologies” program.

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Contact person for press inquiries:

Athanassios Kaliudis,
Phone: +49 711 811-7497
Twitter: @Sakis_JD

Mobility is the largest Bosch Group business sector. In 2023, its sales came to 56.2 billion euros, or just under 60 percent of total Group sales. This makes the Bosch Group one of the leading mobility suppliers. Bosch Mobility pursues a vision of mobility that is safe, sustainable, and exciting. For its customers, the outcome is integrated mobility solutions. The business sector’s main areas of activity are electrification, software and services, semiconductors and sensors, vehicle computers, advanced driver assistance systems, systems for vehicle dynamics control, repair-shop concepts, as well as technology and services for the automotive aftermarket. Bosch is synonymous with important automotive innovations, such as electronic engine management, the ESP anti-skid system, and common-rail diesel technology.

The Bosch Group is a leading global supplier of technology and services. It employs roughly 429,000 associates worldwide (as of December 31, 2023). The company generated sales of 91.6 billion euros in 2023. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology. With its business activities, the company aims to use technology to help shape universal trends such as automation, electrification, digitalization, connectivity, and an orientation to sustainability. In this context, Bosch’s broad diversification across regions and industries strengthens its innovativeness and robustness. Bosch uses its proven expertise in sensor technology, software, and services to offer customers cross-domain solutions from a single source. It also applies its expertise in connectivity and artificial intelligence in order to develop and manufacture user-friendly, sustainable products. With technology that is “Invented for life,” Bosch wants to help improve quality of life and conserve natural resources. The Bosch Group comprises Robert Bosch GmbH and its roughly 470 subsidiary and regional companies in over 60 countries. Including sales and service partners, Bosch’s global manufacturing, engineering, and sales network covers nearly every country in the world. Bosch’s innovative strength is key to the company’s further development. At 136 locations across the globe, Bosch employs some 90,000 associates in research and development, of which nearly 48,000 are software engineers.

Additional information is available online at www.bosch.com, www.iot.bosch.com, www.bosch-press.com.

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