Location History:
- Hyogo, JP (1998)
- Kanagawa, JP (2003)
Company Filing History:
Years Active: 1998-2003
Title: Shigenori Takagishi: Innovator in Semiconductor Technology
Introduction
Shigenori Takagishi is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 2 patents. His work focuses on developing advanced optical devices and epitaxial wafers that enhance the performance of light-emitting devices.
Latest Patents
Takagishi's latest patents include a semiconductor optical device and a method of manufacturing the same. This semiconductor optical device features an optical waveguide part and an optical amplification part, both situated on a GaAs semiconductor substrate. The optical amplification part comprises at least one semiconductor optical amplifier, while the optical waveguide part includes various optical elements, including optical waveguides that are optically connected to the semiconductor optical amplifier. The semiconductor optical amplifier is designed with an active layer made of GaInNAs semiconductor, flanked by conductive type clad layers.
Another notable patent is for a high-performance epitaxial wafer, which is particularly useful in light-emitting devices. This wafer is produced with a buffer layer and has a substrate made from a compound semiconductor, such as GaAs, GaP, InAs, or InP. The buffer layer of GaN is grown on the substrate, with a thickness ranging from 10 nm to 80 nm. The epitaxial layer of GaN is then formed on this buffer layer, utilizing organic metal chloride vapor phase epitaxy at varying temperatures.
Career Highlights
Shigenori Takagishi is currently employed at Sumitomo Electric Industries, Limited, where he continues to innovate in semiconductor technologies. His work has significantly impacted the development of optical devices and epitaxial wafers, contributing to advancements in the field.
Collaborations
Throughout his career, Takagishi has collaborated with notable colleagues, including Yoshiki Miura and Keiichiro Fujita. These collaborations have fostered a productive environment for innovation and research in semiconductor technology.
Conclusion
Shigenori Takagishi is a key figure in the semiconductor industry, with a focus on optical devices and epitaxial wafers. His patents reflect his commitment to advancing technology in this field, making him a valuable contributor to the industry.