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).

“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.

“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.

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