Hans-Rudolf Zeller

Title: Inventor Hans-Rudolf Zeller: A Pioneer in IGBT Technology

Introduction

Hans-Rudolf Zeller, a distinguished inventor based in Birr, Switzerland, has made significant contributions to the field of semiconductor technology, particularly in the development of Insulated Gate Bipolar Transistors (IGBTs). With a portfolio of six patents, Zeller's innovative designs enhance the efficiency and reliability of power electronic systems.

Latest Patents

Among his recent inventions, Zeller has developed a bipolar transistor with an insulated gate electrode. This IGBT is designed for streamlined production while enabling homogeneous activation. Notably, the design eliminates the need for gate fingers, allowing gate current to pass directly through the polysilicon layers of the gate electrodes to the standard cells of the IGBT chip.

Another breakthrough is his short-circuit-resistant IGBT module, which employs a pressure contact mechanism and features multiple parallel-connected chips. This invention includes an additional layer that stabilizes short circuit conditions. The layer, which can take the form of a foil, paste, or a solder component, contacts the main electrodes of the semiconductor chip. By incorporating materials like silver, this layer creates a eutectic mixture with a melting point lower than that of the partner materials, improving reliability during operation.

Career Highlights

Zeller has had an impressive career, working with renowned organizations such as BBC Brown, Boveri & Company, Limited, and Asea Brown Boveri AG. His experience in these companies has not only honed his skills as an inventor but has also allowed him to play a pivotal role in advancing semiconductor technology.

Collaborations

Throughout his career, Hans-Rudolf Zeller has collaborated with notable colleagues, including Thomas Lang and Peter Bruesch. These partnerships have facilitated the exchange of ideas and innovation, leading to significant advancements in their respective fields.

Conclusion

Hans-Rudolf Zeller's contributions to the innovations in IGBT technology illustrate his remarkable ingenuity as an inventor. His latest patents highlight his commitment to improving the performance and safety of power electronic systems. With a solid foundation in reputable companies and collaborations with talented colleagues, Zeller continues to be an influential figure in the realm of semiconductor technology.