Location History:
- Hyogo, JP (1988 - 1989)
- Itami, JP (1989 - 1990)
- Fukuoka, JP (1992 - 1997)
Company Filing History:
Years Active: 1988-1997
Title: Kazuhiko Niwayama: Innovator in Thyristor Technology
Introduction
Kazuhiko Niwayama is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of thyristors. With a total of 11 patents to his name, Niwayama's work has had a substantial impact on the industry.
Latest Patents
Niwayama's latest patents include a thyristor with improved dv/dt resistance. This innovation addresses the challenges posed by abrupt voltage noise applied across an anode and cathode electrode. The design generates displacement currents that flow into a compensation electrode, enhancing the dv/dt resistance of multistage thyristors without sacrificing sensitivity. Another notable patent is the gate turnoff thyristor with reduced gate trigger current. This invention improves withstand voltage and ON-state resistance while reducing turn-on loss and enhancing di/dt resistance. The integration of an n buffer layer and a polysilicon additional resistive layer plays a crucial role in achieving these improvements.
Career Highlights
Kazuhiko Niwayama is currently employed at Mitsubishi Electric Corporation, where he continues to innovate in the field of semiconductor technology. His work has been instrumental in advancing the performance and reliability of thyristors, making them more efficient for various applications.
Collaborations
Niwayama has collaborated with notable colleagues, including Futoshi Tokunoh and Tsutomu Nakagawa. Their combined expertise has contributed to the successful development of several key technologies in the semiconductor industry.
Conclusion
Kazuhiko Niwayama's contributions to thyristor technology exemplify his dedication to innovation and excellence. His patents reflect a deep understanding of semiconductor principles and a commitment to advancing the field.