Location History:
- Yokohama, JP (1991)
- Kanagawa, JP (1998)
- Kawasaki, JP (2003 - 2016)
Company Filing History:
12 out of 39,244 
2 out of 335 
1 out of 86 Years Active: 1991-2016
Title: The Innovations of Haruhiko Kuwatsuka: A Pioneer in Semiconductor Technology
Introduction
Haruhiko Kuwatsuka is a notable inventor based in Kawasaki, Japan, recognized for his significant contributions to semiconductor technology. With a total of 12 patents to his name, he has made strides in enhancing the reliability and performance of semiconductor photodetectors.
Latest Patents
Among his latest patents is a cutting-edge semiconductor photodetector and method for manufacturing the same. This innovation aims to improve reliability by preventing edge breakdown in semiconductor photodetectors with a mesa structure, such as mesa avalanche photodiodes (APDs). The design features a mesa structure formed on a first semiconductor layer, which includes a light-absorbing layer, an electric field buffer layer, an avalanche multiplication layer, and a second semiconductor layer. Importantly, the thickness of the avalanche multiplication layer near the side face of the mesa structure is reduced compared to its thickness at the center, enhancing performance. Another patent focuses on a semiconductor photodetector that activates avalanche multiplication solely at the photodetector portion located at the central region of the mesa structure, thereby further optimizing reliability and functionality.
Career Highlights
Kuwatsuka has held significant roles at major corporations, including Fujitsu Corporation and Sumitomo Electric Device Innovations, Inc. His work at these institutions has been pivotal in advancing semiconductor technologies that cater to various applications in the electronics industry.
Collaborations
Throughout his career, Haruhiko Kuwatsuka has collaborated with several prominent colleagues, including Nami Yasuoka and Toru Uchida. These collaborations have contributed to the innovative processes and developments he has achieved in the field of semiconductor technology.
Conclusion
Haruhiko Kuwatsuka's contributions to semiconductor technology through his patents and collaborative efforts signify his status as an influential inventor in the industry. His innovative approaches to enhancing the reliability of semiconductor photodetectors continue to impact technological advancements, showcasing his dedication to the field.