Roland Villiger

President & CEO

"Our creativity and innovation will help to drive forward fundamental new technologies in the field of power semiconductors!

Our in-depth knowledge in designing and developing power semiconductors will eventually have a significant impact on a more sustainable, clean and green environment.

Ultimately it is our main objective to carefully manage and handle the tight resources of our planet in an appropriate manor and also, to ensure an optimal balance between the economic growth and the ecological aspects of our environment as both are essential for the prosperity of ourselves and future generations!"

SwissSEM – We provide the power for your drive!

Our vision & our mission

We value respect, trust and openness and adhere to our code of conduct. We strive to use business to inspire and implement solutions for a sustainable future and endeavor to better serve the environment and mankind.
We and our supply chain partners act in accordance with internationally acknowledged Ethical Code of Conduct principles, which cover the following areas:

  • Employment and Labor
  • Health and Safety
  • Environment
  • Management System and
  • Ethics in general

These principles are covered and standardized in the
Responsible Business Alliance

Sven Matthias


"Following the requirements of the Responsible Business Alliance benefits humankind. These rules and guidelines require ourselves and our suppliers to act responsibly, sustainably, and on everyone’s behalf."

Our facilities overseas

A state of the art module assembly line is being established to meet the high demand.

Visit our production facilities in China

Chairman of the board

“I have been in this industry over twenty years. It is a long history between me and SwissSEM team. We would like to do something sustainable, something exceptional together to promote the development of power semiconductor world-wide. With the innovation in the business model and mode of cooperation we could provide our customers with the better product, the higher quality in more competitive offering.”

Mr. Xiang Jie

Visit our investor

Organizational Structure

Meet the team

Our team of industry leaders has a proven track record and several decades of hands-on experience in the field of semiconductors. We strive to use our combined century of experience to inspire and implement solutions for a sustainable future.

Executive MBA

Roland Villiger


Roland is a founding-member and CEO of SwissSEM Technologies AG. He has a proven executive management track record and over 25 years of experience in the field of Semiconductor Technology.
Dr. rer. nat.

Sven Matthias


Sven is an experienced Project Manager for Design and Development of Power Semiconductors and a mature Profit Center Manager for EMS and Foundry related business.

Arnost Kopta


Arnost has a proven track record in managing large R&D and Technology organizations in the field of Power Semiconductors with a major focus on IGBT & Diode design.

Chantal Toker

VP S & Q

Chantal is an experienced Quality and Supply Chain Manager in Power Semiconductors with a strong background in AutoCAD, as Design-Layout Master and for Manufacturing Processes.

Raffael Schnell


Raffael is an experienced Global Product Manager, Key Account Manager in Sales and a seasoned Application Expert in the field of Power Semiconductors and Electronics.
Dr. sc. ETH Zürich

Yanrui Ju

Sen. Tech. Expert

Yanrui Ju studied at ETH Zürich in the field of Information Technology and Electrical Engineering. His Ph.D. projects focused on the layout design, TCAD simulation, process development and compact modeling of 4H-SiC power MOSFETs. He studied integrated circuits (IC) and microsystem design.


Johny Q Zhang

VP and General Manager

Johny is an experienced field application engineer with a strong background in testing and assembly of power devices. He joined the Sunking Power Electronics Group in 2016 in managing position.

Jay Liang

Technical Director

Jay is a senior expert in process integration, unit process development with international experience in leading power semiconductor companies.

The SwissSEM locations


Dammweg 23

5600 Lenzburg



No.56 Jinji Road, Huimin Street

JiaShan County, Jiaxing City,

Zhejiang Province, China

Postcode 314100

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