A leap in semiconductor efficiency: Bosch introduces third generation of SiC chips

Stuttgart, Germany – Chips made of silicon carbide (SiC) are the key to making electric cars more efficient and increasing their range. Bosch has now taken the development of these chips to the next level: the company has started to introduce third-generation silicon carbide chips and is supplying samples to global automakers. This means that in the future, more and more electric vehicles will be equipped with Bosch’s cutting-edge third-generation SiC chips. “Silicon-carbide semiconductors are the key drivers of electromobility. They control the flow of energy and make it as efficient as possible. With our next-generation SiC chips, we’re systematically expanding our technological leadership in this field and helping our customers put even more powerful and efficient electric vehicles onto the road,” says Markus Heyn, member of the Bosch board of management and chairman of the Bosch Mobility business sector.

Our ambition is clear: we want to be a globally leading manufacturer of SiC chips,

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

Bosch is thus positioning itself in a promising, high-growth market. Analyses by the market research and consulting company Yole Intelligence* forecast that the global market for SiC power semiconductors will grow from 2.3 billion U.S. dollars in 2023 to around 9.2 billion U.S. dollars by 2029, driven primarily by electromobility.

Billions invested in global manufacturing network

Silicon-carbide semiconductors switch much faster and more efficiently than conventional silicon chips. They reduce energy losses and enable a higher power density in the electronics. Bosch’s next-generation semiconductors offers not only a technological advantage, but also an economic one. “Our next-generation chips deliver 20 percent higher performance and are also significantly smaller than the previous generation,” Heyn says. “This miniaturization is the key to greater cost efficiency, as we can produce many more chips per wafer. That means we’re playing a key role in making high-performance electronics more widely available.” Bosch has already delivered more than 60 million SiC chips worldwide since the first generation went into production in 2021.

In recent years, Bosch has pushed ahead with its development work for SiC chips and at the same time increased its manufacturing and clean-room capacity. The company has invested around 3 billion euros in semiconductors as part of Europe’s IPCEI (Important Projects of Common European Interest) funding programs for microelectronics and communication technology. Its wafer fab in Reutlingen, Germany, develops and manufactures the third-generation SiC chips on modern 200-millimeter wafers. In September 2023, Bosch acquired a second fab for SiC chip manufacturing in Roseville, California, and is currently equipping it with state-of-the-art, highly complex production facilities. The company is investing an additional 1.9 billion euros in the U.S. plant, which will manufacture and deliver its first SiC chips this year – initially as samples for customer trials. “In the future, Bosch will supply its innovative SiC chips from these two fabs in Germany and the U.S.,” Heyn says. This will make for more robust and resilient supply chains in the rapidly growing electrification of the automotive industry. In the medium term, Bosch intends to expand its manufacturing capacity for SiC power semiconductors to a unit volume running into the mid-nine figure range.

Unique “Bosch process” is the key to success

Bosch uses unique manufacturing expertise to make its chips both smaller and more powerful. The company adapted its etching process, which has existed since 1994 and is known throughout the industry as the “Bosch process.” Originally developed for sensors, this process enables the manufacture of high-precision vertical structures in silicon carbide. This design greatly increases the chips’ power density – a decisive factor for the third generation’s superior performance.

_{*Power SiC 2024 report, Yole Intelligence, 2024}