Bosch Semiconductor Plant in Roseville, California

The semiconductor manufacturing project by Robert Bosch GmbH is an upgrade of an existing facility in Roseville, California to support the production of silicon carbide semiconductors. The company secured up to $225 million in funding under the CHIPS Act, contributing to a total project value of approximately $1.9 billion.

The facility is being converted to manufacture semiconductors used in applications such as electric vehicles and charging systems, with production expected to begin in 2026. As part of the transition, Bosch retained employees from the plant’s previous operator, TSI Semiconductors, and implemented training programmes through its manufacturing network.

The project formed part of broader developments in semiconductor production in the United States, including initiatives related to domestic manufacturing capacity.

On 1st September 2025 Samsung Electronics announced the resumption of the construction on its massive semiconductor plant in Taylor, Texas, backed by a fresh $4 billion investment supporting a trend that is seeing the development of semi conductor plants in the country.

Other Projects

Other than the Bosch semiconductor plant in California, Musk is also advancing the $20bn Terafab project in Austin, Texas. Intel has joined Elon Musk’s $20 billion Terafab project in Texas as the chipmaker announced their involvement on social media platform X. “Our ability to design, fabricate, and package ultra-high-performance chips at scale will help accelerate Terafab’s aim to produce 1 TW/year of compute to power future advances in AI and robotics,” Intel wrote. Furthermore, the post included a photo of Intel CEO Lip-Bu Tan shaking hands with Musk in front of an Intel sign.

Terafab Project in Austin, Texas

CHIPS Act

Reported on 13th December 2024 – Rep. Doris Matsui pointed out the impact of CHIPS Act, the law which she called as a critical tool to build a strong and sustainable semiconductor ecosystem. Paul Thomas, the CEO of Bosch in North America said that the domestic production of silicon carbide semiconductors will help U. S consumers in their journey toward electrification, and this Bosch’s plant in Roseville is right move toward this goals.

Thorsten Scheer, the plant manager pointed out that the company opted to expand an existing wafer fabrication facility rather than construct a new one. He pointed out the talented Roseville workforce as one of the reasons for this approach, saying that the workforce was skilled and committed during the transformation of the site.

In April 2023, Bosch announced its initial investment. Stefan Hartung, the chairman of the board of management, emphasized that the company would build the factory with or without CHIPS Act funding. Bosch originally committed $1.5 billion to the project. The Department of Commerce now reports the total investment has grown to $1.9 billion, according to their recent press release.

Construction of the plant is being done under the project labor agreement signed with the Sacramento-Sierra Building and Construction Trades Council. It aims at producing the first chips in Roseville on 200-millimeter wafers by 2026, which is a big step in Bosch’s semiconductor manufacturing strategy in the United States.

Bosch Semiconductor Manufacturing Plant in Roseville: Project Factsheet

Project Overview

Location: Roseville, California

Total Investment: $1.9 billion

CHIPS Act Funding: Up to $225 million

Expected First Production: 2026

Project Specifications

Facility Type: Renovated semiconductor manufacturing plant

Chip Type: Silicon carbide chips

Wafer Size: 200-millimeter

Primary Applications: Electric vehicles, charging systems, power electronics

Key Stakeholders

Company: Bosch (Stuttgart, Germany)

Local Workforce: 250 retained employees

Construction Partner: Sacramento-Sierra’s Building and Construction Trades Council

Bosch Roseville semiconductor manufacturing plant: Milestones

April 2023: Initial investment announcement

2024: Ongoing facility renovation

2026: Projected first chip production

CHIPS Act funding for Bosch Roseville plant: Strategic Objectives

Strengthen U.S. domestic semiconductor manufacturing

Support electrification of transportation

Develop local high-tech manufacturing capabilities

Economic Impact

Job retention and advanced training

Local infrastructure investment

Support for U.S. technology supply chain

Construction Review