Kazutoshi Nagata

Title: Kazutoshi Nagata: Innovator in Compound Crystal Technology

Introduction

Kazutoshi Nagata is a prominent inventor based in Annaka, Japan, known for his significant contributions to the field of compound crystal technology. With a total of nine patents to his name, he has made remarkable advancements in the production of group III compound substrates.

Latest Patents

One of his latest patents is a method for producing a group III compound crystal by hydride vapor phase epitaxy on a seed substrate formed on a group III nitride base substrate. This invention outlines a process that includes forming a group III nitride base substrate through vapor phase synthesis, creating a seed substrate on this base, and subsequently forming a group III compound crystal on the seed substrate. The method allows for the production of large-sized and high-quality group III compound substrates at a low cost, leveraging the high film formation rate characteristic of hydride vapor phase epitaxy.

Another notable patent involves the production of a GaN laminate substrate with a front surface that exhibits Ga polarity. This process includes transferring a C-plane sapphire thin film onto a ceramic handle substrate, performing high-temperature nitriding treatment, and growing GaN epitaxially on a surface treatment layer made of AlN. The method also details the ion implantation of a GaN film and the subsequent transfer of a GaN thin film onto a support substrate.

Career Highlights

Kazutoshi Nagata has worked with esteemed organizations such as Shin-Etsu Chemical Co., Ltd. and the National Institute of Advanced Industrial Science and Technology. His experience in these institutions has significantly contributed to his expertise in the field of compound crystals.

Collaborations

Throughout his career, Nagata has collaborated with notable colleagues, including Shoji Akiyama and Yoshihiro Kubota. These partnerships have fostered innovation and advancement in their shared field of research.

Conclusion

Kazutoshi Nagata's work in the realm of compound crystal technology has led to significant advancements and innovations. His patents reflect a commitment to improving the quality and cost-effectiveness of group III compound substrates. His contributions continue to influence the industry and inspire future innovations.