Yosinobu Yamaguchi

Title: Yosinobu Yamaguchi: Innovator in Abrasive Composition Technology

Introduction

Yosinobu Yamaguchi is a notable inventor based in Nagoya, Japan. He has made significant contributions to the field of abrasive compositions, particularly in the polishing of aluminum-based substrates. His innovative work has led to advancements in the manufacturing processes for magnetic recording discs.

Latest Patents

Yamaguchi holds a patent for an abrasive composition and process for polishing. This composition includes an aluminous abrasive with an average particle size of 0.5-10 µm and a concentration of 1 to 25% by weight. It also contains nickel sulfamate and/or sulfate, with a concentration of 0.5 to 10% by weight, magnesium nitrate at a concentration of 0.1 to 12% by weight, and water. The composition is designed to have a pH of 4 to 7. This innovative abrasive composition effectively reduces protrusions, pits, and deep scratches when used for polishing aluminum-based substrates, enhancing the quality of magnetic recording discs.

Career Highlights

Throughout his career, Yamaguchi has worked with prominent companies such as Yamaguchi Seiken Kogyo Kabushiki Kaisha and Showa Denko Kabushiki Kaisha. His experience in these organizations has allowed him to refine his expertise in abrasive technologies and contribute to various advancements in the field.

Collaborations

Yamaguchi has collaborated with notable coworkers, including Ken Ishitobi and Kunihiro Miyazaki. Their joint efforts have further propelled innovations in abrasive compositions and polishing processes.

Conclusion

Yosinobu Yamaguchi's contributions to abrasive composition technology have made a significant impact on the industry. His patented innovations continue to enhance the quality of products in the magnetic recording sector.