Keizo Hosoda

Introduction

Keizo Hosoda is a notable inventor based in Ibaraki, Japan, renowned for his contributions to capacitor technology. With a total of four patents to his name, he has made significant advancements in the manufacturing processes of capacitors, particularly utilizing tantalum oxide films as insulating materials.

Latest Patents

Hosoda's most recent innovations include two groundbreaking patents. The first, titled "Method of manufacturing a capacitor having tantalum oxide film as an insulating film," involves forming a tantalum oxide film on a conductive substrate through vapor-deposition. The film is treated with active oxygen species and subsequently annealed at temperatures lower than the crystallization temperature by 10 to 80°C in an inert atmosphere. This meticulous process allows for the creation of a stable insulating layer before the upper conductive film is applied.

The second patent, "Capacitor for analog circuit, and manufacturing method thereof," details a rapid thermal nitridation method to form a nitride film on a silicon lower electrode. A tantalum oxide dielectric film is then layered over this nitride film. The inclusion of wet oxidation processes is essential, as it facilitates the formation of an oxide layer between the lower electrode and the nitride film, ensuring the capacitor achieves optimum functionality.

Career Highlights

Keizo Hosoda has established himself as an invaluable asset at Tokyo Electron Limited, a leading company in the semiconductor manufacturing equipment sector. His expertise in capacitor technology has played a critical role in the development of advanced electronic components. His innovative methodologies have not only advanced the technology in capacitors but also enhanced the efficiency of manufacturing processes within the industry.

Collaborations

Throughout his career, Hosoda has collaborated with esteemed colleagues such as Yusuke Muraki and Atsushi Sato. Their collective expertise and innovative spirit have fostered an environment conducive to groundbreaking developments in capacitor technology. Such collaborations highlight the importance of teamwork in advancing scientific and technological frontiers.

Conclusion

Keizo Hosoda's contributions to the field of capacitors, particularly through his innovative patents, underscore his significance as an inventor. His work at Tokyo Electron Limited continues to influence the advancement of electronic components, ensuring that the future of capacitor technology remains bright and promising.