Company Filing History:
1 out of 172 
1 out of 17 
1 out of 1 Years Active: 1992
Title: Teiji Hasegawa: Innovator in Surge Absorption Technology
Introduction
Teiji Hasegawa is a notable inventor based in Kawasaki, Japan. He is recognized for his contributions to the field of semiconductor technology, particularly in the development of surge absorption devices. His innovative work has led to the filing of a patent that showcases his expertise and creativity in this specialized area.
Latest Patents
Teiji Hasegawa holds a patent for a surge absorption device. This device fundamentally includes a first semiconductor region, a second semiconductor region forming a pn junction with the first region, a third region that determines the effective thickness of the second region, and a fourth region that is in contact with the first region. The fourth region forms an injection junction that allows for the injection of minority carriers into the first region. When a depletion layer formed by reverse bias across the pn junction reaches the third region, a punch-through region is created in the second region. In this state, the injected minority carriers from the fourth region are absorbed by the second region, constituting the device current.
Career Highlights
Throughout his career, Teiji Hasegawa has worked with prominent organizations, including the Agency of Industrial Science and Technology under the Ministry of International Trade and Industry, as well as Sankosha Corporation. His experience in these institutions has significantly contributed to his development as an inventor and has provided him with a platform to innovate in semiconductor technology.
Collaborations
Teiji Hasegawa has collaborated with notable colleagues such as Yutaka Hayashi and Masaaki Sato. These collaborations have likely enriched his work and contributed to advancements in the field of surge absorption technology.
Conclusion
Teiji Hasegawa's contributions to semiconductor technology, particularly through his surge absorption device patent, highlight his innovative spirit and technical expertise. His work continues to influence the field and showcases the importance of collaboration in driving technological advancements.