Company Filing History:
Years Active: 1985-1987
Title: Fumikatsu Yoshimura: Innovator in Magnetic Film Technology
Introduction
Fumikatsu Yoshimura is a notable inventor based in Mito, Japan. He has made significant contributions to the field of magnetic film technology, holding a total of 2 patents. His work focuses on the development of iron oxide magnetic films, which have various applications in technology.
Latest Patents
Yoshimura's latest patents include innovations related to iron oxide magnetic films, specifically the gamma-Fe2O3 film. This film incorporates at least one additive selected from a group that includes Pd, Au, Pt, Rh, Ag, Ru, Ir, and Os, with a particular emphasis on Os. The addition of Os accelerates the reduction from alpha-Fe2O3 to Fe3O4, leading to a uniform reduction and an increased ratio of the magnetic phase in the film. The gamma-Fe2O3 film medium enhanced with Os improves saturation magnetization and increases coercive force in proportion to the amount of Os added. Furthermore, applying an external field introduces magnetic anisotropy into the film, enhancing its coercive force and squareness of the hysteresis loop. The crystal grain of gamma-Fe2O3 is prepared using Os to achieve fine grain, resulting in a film medium that decreases noise levels.
Career Highlights
Fumikatsu Yoshimura is currently employed at Nippon Telegraph and Telephone Public Corporation. His work at this esteemed organization has allowed him to focus on advancing magnetic film technologies, contributing to both academic and practical applications in the field.
Collaborations
Yoshimura has collaborated with notable colleagues such as Osamu Ishii and Iwao Hatakeyama. These collaborations have further enriched his research and development efforts in magnetic film technology.
Conclusion
Fumikatsu Yoshimura's innovative work in the field of magnetic films has led to significant advancements in technology. His contributions continue to influence the development of materials with enhanced magnetic properties.