Location History:
- Kokubunji, JP (1988 - 1989)
- Koganei, JP (1989 - 1993)
- Urawa, JP (1995 - 2001)
- Odawara, JP (2003)
Company Filing History:
Years Active: 1988-2003
Title: Innovations of Yoshihiro Hamakawa
Introduction
Yoshihiro Hamakawa is a prominent inventor based in Urawa, Japan. He has made significant contributions to the field of magnetic storage technology, holding a total of 14 patents. His work focuses on enhancing the performance and reliability of magnetoresistive heads and magnetic storage systems.
Latest Patents
One of his latest patents is for a magnetoresistive head and magnetic storage apparatus. This invention provides a magnetoresistive head capable of suppressing fluctuations in read output while ensuring a sufficient dielectric breakdown voltage of the shielding portions. The shielding portions are constructed with a Co-based material, allowing for improved performance. The lower shield film is designed as a 2-ply composite film, which includes an amorphous soft magnetic film and a crystalline soft magnetic film. This design enables the suppression of read output fluctuations even when the gap is narrowed, without compromising yield relative to dielectric breakdown.
Another notable patent involves a magnetic head employing a magnetoresistive sensor and a magnetic storage and retrieval system. This magnetic head features a magnetoresistive sensor that is less susceptible to heat and includes a fixed layer capable of creating a pinned magnetic field of sufficient intensity. The design incorporates a magnetoresistive effect film with a free layer, a fixed layer, and an intermediate layer, along with a pair of electrodes for current supply. The materials used in the fixed layer are strategically chosen to enhance performance and reliability.
Career Highlights
Yoshihiro Hamakawa has had a successful career at Hitachi, Ltd., where he has been instrumental in advancing magnetic storage technologies. His innovative approaches have led to significant improvements in the efficiency and effectiveness of magnetic heads used in various applications.
Collaborations
Throughout his career, Hamakawa has collaborated with notable colleagues, including Kazuo Shiiki and Eijin Moriwaki. These collaborations have contributed to the development of cutting-edge technologies in the field of magnetoresistive sensors and magnetic storage systems.
Conclusion
Yoshihiro Hamakawa's contributions to the field of magnetic storage technology are noteworthy. His innovative patents and collaborations have significantly advanced the performance of magnetoresistive heads and magnetic storage systems. His work continues to influence the industry and pave the way for future innovations.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.