Location History:
- Nagano, JP (1996)
- Yamanashi, JP (2004 - 2006)
- Tokyo, JP (2009)
Company Filing History:
Years Active: 1996-2009
Title: Sadafumi Iijima: Innovator in Magnetic Recording Technology
Introduction
Sadafumi Iijima is a prominent inventor based in Yamanashi, Japan. He has made significant contributions to the field of magnetic recording technology, holding a total of 4 patents. His work focuses on enhancing the performance and manufacturing processes of magnetic recording media.
Latest Patents
Iijima's latest patents include innovations in magnetic recording mediums and methods for their manufacturing. One of his notable inventions is a high recording density magnetic recording medium that improves dilution stability during the preparation of magnetic paint. This advancement allows for lower concentrations of magnetic paint without compromising surface roughness or the output of the thin magnetic layer. The magnetic recording medium features a magnetic layer on a non-magnetic support, incorporating a magnetic powder, a vinyl chloride resin, and an aliphatic polyester polyurethane resin as binder resins. Additionally, it includes an aromatic compound with specific substituents and a phosphoric acid ester, ensuring optimal performance.
Another patent focuses on a magnetic recording medium that boasts excellent surface smoothness, electromagnetic conversion characteristics, and durability. This medium consists of a lower non-magnetic layer containing a non-magnetic powder and a binder resin, topped with an upper magnetic layer of 0.2 micrometers or less. The lower non-magnetic layer utilizes an acicular powder of hydrated iron oxide, preferably goethite, to enhance its properties.
Career Highlights
Sadafumi Iijima is associated with TDK Corporation, a leading company in the electronics industry. His work at TDK has allowed him to push the boundaries of magnetic recording technology, contributing to advancements that benefit various applications in data storage.
Collaborations
Iijima has collaborated with notable colleagues, including Takayoshi Kuwajima and Kenichi Kitamura. These partnerships have fostered innovation and development in their shared field of expertise.
Conclusion
Sadafumi Iijima's contributions to magnetic recording technology exemplify his dedication to innovation and excellence. His patents reflect a commitment to improving the efficiency and effectiveness of magnetic recording mediums, making a lasting impact in the industry.