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Bosch Establishes Roseville, California, Operations

Global semiconductor manufacturer Bosch plans to acquire assets of TSI Semiconductors and expand its semiconductor business with silicon carbide chips in Roseville, California. The $1.5 billion project will convert the TSI manufacturing facilities to state-of-the-art processes.

The first chips will be produced on 200-millimeter wafers based on the innovative material silicon carbide (SiC). Operations are scheduled for 2026.

“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,” noted Dr. Stefan Hartung, the chairman of the Bosch board of management.

The Bosch Group is a leading global supplier of technology and services. Company operations are divided into four business sectors: Mobility Solutions, Industrial Technology, Consumer Goods, and Energy and Building Technology.

“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.

TSI Semiconductors is a specialty foundry offering flexible technology development and the highest industry quality manufacturing solutions for projects ranging from the smallest to very large lot sizes.

“Bosch’s planned investment presents momentous economic opportunity for Roseville and the region. We're pleased to be the site for potential growth in global semiconductor manufacturing. We look forward to welcoming Bosch to our city and being a strong community partner,” added City of Roseville Economic Development Director Melissa Anguiano.

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