Location History:
- Kanagawa, JP (1997)
- Miyagi, JP (1991 - 1998)
Company Filing History:
Years Active: 1991-1998
Title: The Innovative Contributions of Shuichi Igarashi
Introduction
Shuichi Igarashi is a prominent inventor based in Miyagi, Japan. He has made significant contributions to the field of optical and magneto-optical technologies. With a total of 5 patents to his name, Igarashi's work has had a considerable impact on the industry.
Latest Patents
Igarashi's latest patents include an innovative optical disc design. This optical disc features a recording layer composed of a first Sb--Se based thin film, a Bi--Te based thin film, and a second Sb--Se based thin film, all deposited in a specific order on a disc substrate. The design ensures that each of the first and second Sb--Se thin films contains at least 70 atm % of selenium. The film thicknesses are carefully controlled to optimize reflectance with respect to a laser beam of 680 nm wavelength.
Another notable patent is for a magneto-optical disk. This disk has a four-layer structure that includes a protective dielectric layer, a recording magnetic layer, a second protective dielectric layer, and a reflective metal layer. The recording magnetic layer is primarily composed of TbFeCo and has specific thickness constraints to enhance its performance. The design considerations for the various layers take into account both optical and magneto-optical properties, as well as dynamic thermal responses.
Career Highlights
Shuichi Igarashi is currently employed at Sony Corporation, where he continues to innovate in the field of optical technologies. His work has been instrumental in advancing the capabilities of optical and magneto-optical storage solutions.
Collaborations
Igarashi has collaborated with notable colleagues, including Yasuaki Nakane and Sakuya Tamada. Their combined expertise has contributed to the successful development of various technologies in their field.
Conclusion
Shuichi Igarashi's contributions to optical and magneto-optical technologies are noteworthy. His innovative patents and collaborations reflect his commitment to advancing technology in meaningful ways.