Location History:
- Odawara, JP (2005 - 2007)
- Kanagawa, JP (2008 - 2012)
Company Filing History:
5 out of 2,636 
1 out of 42,508 
1 out of 227 
Years Active: 2005-2012
Title: Masahiko Hatatani: Innovator in Magnetic Head Technology
Introduction
Masahiko Hatatani is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of magnetic head technology, holding a total of seven patents. His work focuses on enhancing the performance and stability of magnetic recording and read heads.
Latest Patents
One of his latest patents is titled "Magnetic head and manufacturing method thereof." This invention provides a magnetic head that ensures stable reading operations while minimizing magnetic fluctuation noise. The design features a free layer composed of two ferromagnetic layers, which are coupled anti-ferromagnetically through a non-magnetic intermediate layer. The magnetization amount of the first free layer is set to be larger than that of the second free layer. This configuration stabilizes the magnetic domains in both layers, significantly reducing magnetic fluctuation noises and achieving a high signal-to-noise (SN) ratio.
Another notable patent is "Magnetic head with laminated side shields." This invention addresses the challenge of reducing the spread read width in narrow tracks of 100 nm or less while maintaining stable read operations. The side magnetic shield is designed with a multi-layered structure that includes non-magnetic separate layers and soft magnetic layers, which are magnetized in opposite directions to mitigate the magnetic field induced by the side magnetic shield.
Career Highlights
Masahiko Hatatani has worked with notable companies such as Hitachi Global Storage Technologies and Hitachi, Ltd. His experience in these organizations has allowed him to develop innovative solutions in magnetic head technology.
Collaborations
Throughout his career, Hatatani has collaborated with esteemed colleagues, including Kenichi Meguro and Chiseki Haginoya. These partnerships have contributed to the advancement of his research and inventions.
Conclusion
Masahiko Hatatani's contributions to magnetic head technology have significantly impacted the field, showcasing his expertise and innovative spirit. His patents reflect a commitment to improving the performance and reliability of magnetic recording systems.