This inventor holds 7 USPTO granted patents. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1987-1992.
Location History:
- Hyogo, JP (1990)
- Itami, JP (1987 - 1992)
Company Filing History:
Years Active: 1987-1992
Title: Innovations of Yoshito Seiwa in Semiconductor Laser Technology
Introduction
Yoshito Seiwa is a prominent inventor based in Itami, Japan. He has made significant contributions to the field of semiconductor laser technology, holding a total of 7 patents. His work focuses on methods of producing semiconductor lasers that enhance their efficiency and performance.
Latest Patents
One of his latest patents is a method of producing a semiconductor laser by implanting impurities. This innovative semiconductor laser device includes a substrate with a groove through which the laser light is emitted. It features a first layer positioned between the substrate and an active layer, which includes a superlattice region opposite the groove. This superlattice region has the same conductivity type as the region in the side walls of the groove. Additionally, there is a disordered region in the first layer adjacent to the superlattice of a different conductivity type, which helps confine current flow from the substrate to the active layer. The method involves implanting impurity ions that change the conductivity type while suppressing the disordering of the superlattice region after annealing. The ions are implanted through the groove, creating the desired conductivity type region in the side walls of the groove.
Career Highlights
Yoshito Seiwa is associated with Mitsubishi Electric Corporation, where he has been instrumental in advancing semiconductor laser technologies. His innovative approaches have led to significant improvements in the efficiency and functionality of semiconductor lasers.
Collaborations
He has collaborated with notable coworkers, including Toshitaka Aoyagi and Susumu Hinata, contributing to various projects that enhance the capabilities of semiconductor devices.
Conclusion
Yoshito Seiwa's work in semiconductor laser technology exemplifies the impact of innovation in the field. His patents and collaborations continue to influence advancements in this critical area of technology.