Location History:
- Nagoya, JP (1996)
- Hadano, JP (1998)
Company Filing History:
3 out of 189 
1 out of 36,854 
1 out of 12 Years Active: 1996-1998
Title: Hiroaki Kotaka: Innovator in Aluminum Nitride and Quartz Material Technologies
Introduction
Hiroaki Kotaka is a notable inventor based in Nagoya, Japan. He has made significant contributions to the fields of materials science and engineering, particularly in the development of advanced manufacturing methods for aluminum nitride and surface treatments for quartz materials. With a total of 3 patents to his name, Kotaka's work has implications for various industrial applications.
Latest Patents
One of Kotaka's latest patents is a method of manufacturing aluminum nitride. This innovative process involves preparing a mixed gas of ammonia and hydrocarbon, calcining gamma-Al2O3 at controlled temperatures, and subsequently heating it in the mixed gas to produce porous aluminum nitride with a specific surface area of 10 m²/g or more. The final step includes heat-treating the porous aluminum nitride to minimize carbon and oxygen content to 1 weight % or less.
Another significant patent is a surface treatment method for quartz material. This method utilizes a heat contact treatment with ammonia gas at temperatures below 1200°C, in the presence of a carbon-generating source. The result is a silicon oxynitride layer that enhances the heat resistance of the quartz material, preventing exfoliation even under repetitive heat cycles. Additionally, a second treatment step can further improve the heat resistance by applying a silicon nitride film.
Career Highlights
Hiroaki Kotaka has worked with prominent companies such as Toshiba Ceramics Co., Ltd. and Toyota Motor Corporation. His experience in these organizations has allowed him to refine his expertise in materials science and contribute to innovative projects.
Collaborations
Throughout his career, Kotaka has collaborated with talented individuals, including Hidenori Yamaoka and Shuitsu Matsuo. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Hiroaki Kotaka's contributions to the fields of aluminum nitride manufacturing and quartz material treatment highlight his innovative spirit and dedication to advancing materials science. His patents reflect a commitment to improving industrial processes and enhancing material properties.