Location History:
- Aichi, JP (2013 - 2016)
- Kiyosu, JP (2015 - 2022)
Company Filing History:
6 out of 3,081 
1 out of 4,920 
1 out of 989 
Years Active: 2013-2022
Title: Innovations of Yasuhide Yakushi in Group III Nitride Semiconductors.
Introduction
Yasuhide Yakushi is a prominent inventor based in Kiyosu, Japan, known for his significant contributions to the field of semiconductor technology. With a total of six patents to his name, he has made remarkable advancements in the production of Group III nitride semiconductors.
Latest Patents
One of his latest patents is a method for producing a Group III nitride semiconductor by controlling the oxygen concentration of the furnace internal atmosphere. This invention effectively suppresses anomalous growth of a Group III nitride semiconductor at the periphery of a seed substrate. The method involves feeding a nitrogen-containing gas into a molten mixture of a Group III metal and a flux placed in a furnace, allowing for the growth of the semiconductor on a seed substrate. The oxygen concentration of the furnace internal atmosphere is elevated after reaching the growth initiation temperature, with specific control over the oxygen levels during the growth process.
Another notable patent by Yakushi is a method for producing Group III nitride semiconductors through the flux method. This innovation aims to reduce ungrown regions or abnormal grain growth during the semiconductor growth process. The method utilizes a seed substrate with a Group III nitride semiconductor layer and a mask with a specific pattern to facilitate the growth. Additionally, carbon is strategically placed on the lid of the crucible to gradually enhance the molten mixture, thereby minimizing growth irregularities.
Career Highlights
Throughout his career, Yasuhide Yakushi has worked with notable companies such as Toyoda Gosei Co., Ltd. and NGK Insulators, Inc. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Yasuhide Yakushi has collaborated with esteemed colleagues, including Seiji Nagai and Shiro Yamazaki, further enhancing his contributions to the field.
Conclusion
Yasuhide Yakushi's innovative work in the production of Group III nitride semiconductors has significantly impacted the semiconductor industry. His patents reflect a deep understanding of the complexities involved in semiconductor growth, showcasing his role as a leading inventor in this field.