Location History:
- Itami, JP (1986)
- Hyogo, JP (1984 - 1987)
Company Filing History:
Years Active: 1984-1987
Title: Kozo Yamagami: Innovator in Thyristor Technology
Introduction
Kozo Yamagami is a notable inventor based in Hyogo, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of gate turn-off thyristors. With a total of 3 patents to his name, Yamagami continues to push the boundaries of innovation in this area.
Latest Patents
Yamagami's latest patents include a gate turn-off thyristor module designed to reduce circuit inductances. This innovative module houses one or more gate turn-off thyristor chips within a resin package. The main electrode and control terminals are strategically placed on the upper face of the package, while terminals for connecting to a snubber circuit are positioned at a different height. This design ensures that the snubber circuit connecting terminals are as close as possible to their corresponding thyristor chip electrodes. Another significant patent is for a gate turn-off thyristor that features P+ gate and emitter regions. This thyristor includes N-type emitter regions formed in part within the surface layer of a P-type base layer. The P+ layer regions of high impurity concentration are located immediately beneath the gate electrodes and the periphery of the N-type emitter regions, enhancing the device's performance.
Career Highlights
Yamagami is currently employed at Mitsubishi Electric Corporation, where he applies his expertise in semiconductor technology. His work has been instrumental in advancing the capabilities of thyristor devices, making them more efficient and reliable for various applications.
Collaborations
Throughout his career, Yamagami has collaborated with esteemed colleagues such as Toshihiro Nakajima and Yoshiaki Hisamoto. These collaborations have fostered a creative environment that has led to groundbreaking advancements in their field.
Conclusion
Kozo Yamagami's contributions to thyristor technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of semiconductor design and functionality, positioning him as a key figure in the industry.