Location History:
- Tokyo, JP (1978 - 1979)
- Hinodemachi, JP (1982)
- Hitachi, JP (1985 - 2001)
Company Filing History:
8 out of 42,485 
1 out of 9 Years Active: 1978-2001
Title: The Innovative Journey of Katsuhisa Usami
Introduction: Katsuhisa Usami is a prominent inventor based in Hitachi, Japan, recognized for his contributions to the development of advanced magnetic head technologies. With a total of 8 patents to his name, Usami has made significant strides in enhancing the performance and efficiency of magnetoresistive and spin valve heads used in various applications.
Latest Patents: Usami's latest patents focus on the design and composition of magnetic heads that utilize a layered structure. These innovative heads feature a soft-magnetic layer primarily composed of NiFe positioned near a spacer layer of Ta. This arrangement is crucial for ensuring the proper crystal orientation of the NiFe layer. To optimize performance, an isolate layer is strategically placed between the spacer and soft-magnetic layers, preventing the formation of a diffusion boundary that can degrade the soft-magnetic properties of the NiFe layer, especially when its thickness is 10 nanometers or less. The isolate layer is formulated from materials that do not form solid solutions with Ta or Ni and Fe, featuring compositions that include elements such as Co, Fe, Ti, V, Zr, Nb, among others. Notably, this isolate layer can also exhibit an amorphous structure or a face-centered cubic (fcc) structure.
Career Highlights: Throughout his career, Katsuhisa Usami has made impactful contributions while working at notable companies, including Hitachi, Ltd. and Hitachi Instruments Engineering Co., Ltd. His innovative spirit and commitment to advancing technology in the field of magnetic heads have earned him recognition among peers and industry leaders.
Collaborations: Usami has collaborated with esteemed colleagues such as Takashi Aoyama and Isao Ishikawa. These partnerships have facilitated the exchange of ideas and have furthered the development of cutting-edge technologies in the realm of magnetic heads.
Conclusion: Katsuhisa Usami exemplifies the role of a visionary inventor in the technology sector. His patents reflect a deep understanding of material science and engineering, showcasing innovations that enhance the functionality of magnetic head devices. As advancements in this field continue to evolve, Usami's contributions will undoubtedly play a pivotal role in shaping the future of data storage and retrieval technologies.
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.