Aiko Ohishi

Title: Aiko Ohishi: Innovator in Semiconductor Laser Technology

Introduction

Aiko Ohishi is a prominent inventor based in Kokubunji, Japan. She has made significant contributions to the field of semiconductor laser devices. Her innovative work has led to the development of technologies that enhance the performance and stability of semiconductor lasers.

Latest Patents

Aiko Ohishi holds a patent for semiconductor laser devices. This invention discloses a semiconductor laser capable of high temperature and high output operation. It achieves this by forming a mesa stripe with an active layer in a reverse triangular mesa shape. Additionally, thick semiconductor layers are formed on both sides of the mesa stripe, resulting in p-n junctions that have a current blocking function. The invention also describes a semiconductor laser where the formation of the p-n junctions occurs before the formation of the reverse mesa stripe, with ion implantation introduced to form the p-n junctions. Furthermore, her invention relates to transistors and semiconductor lasers using InGaAsP type quaternary compounds as the semiconductor. The quaternary compounds have a composition with an energy band gap ranging from 1.2 to 1.4 eV, formed in a thickness of up to 1 μm. This results in semiconductor devices that exhibit a small leakage current and stability over time.

Career Highlights

Aiko Ohishi is associated with Hitachi, Ltd., where she has been able to apply her expertise in semiconductor technology. Her work has been instrumental in advancing the capabilities of semiconductor lasers, making them more efficient and reliable.

Collaborations

Aiko has collaborated with notable colleagues such as Shinji Tsuji and Hitoshi Nakamura. Their combined efforts have contributed to the success of various projects in the semiconductor field.

Conclusion

Aiko Ohishi's contributions to semiconductor laser technology exemplify her innovative spirit and dedication to advancing the field. Her patent and work at Hitachi, Ltd. highlight her role as a leading inventor in this important area of technology.