Hajime Kusumoto

Title: Hajime Kusumoto: Innovator in Epitaxial Growth Technology

Introduction

Hajime Kusumoto is a notable inventor based in Tama, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the area of epitaxial growth layers.

Latest Patents

Kusumoto holds a patent for a method of making an epitaxial growth layer of GaAs.sub.1-x P.sub.x. This innovative process involves epitaxially growing a layer of GaAs.sub.1-x P.sub.x on GaAs, which is positioned in a reaction tube at a different location from the Ga source. The method requires maintaining the GaAs at a temperature range of approximately 750°C to 850°C, while the Ga source is kept at a higher temperature. The introduction of As.sub.4 gas, PCl.sub.3 gas, and H.sub.2 gas or AsCl.sub.3 gas, P.sub.4 gas, and H.sub.2 gas into the reaction tube facilitates the reaction with the Ga source, producing GaCl gas that contacts the surface of the GaAs.

Career Highlights

Kusumoto is associated with Hitachi, Ltd., a leading company in technology and innovation. His work has been instrumental in advancing the understanding and application of epitaxial growth techniques in semiconductor manufacturing.

Collaborations

He has collaborated with esteemed colleagues such as Masahiko Ogirima and Toshimitu Shinoda, contributing to various projects that enhance the capabilities of semiconductor technologies.

Conclusion

Hajime Kusumoto's contributions to the field of epitaxial growth technology exemplify the innovative spirit of modern inventors. His patent and work at Hitachi, Ltd. continue to influence advancements in semiconductor applications.