Location History:
- Ibaraki, JP (2013)
- Ushiku, JP (2015)
Company Filing History:
2 out of 2,347 
2 out of 984 
1 out of 407 
Years Active: 2013-2015
Title: Makiko Kiyomi: Innovator in Nitride Crystal Production
Introduction
Makiko Kiyomi is a prominent inventor based in Ushiku, Japan. She has made significant contributions to the field of materials science, particularly in the production of nitride crystals. With a total of 2 patents, her work focuses on enhancing the efficiency and purity of nitride crystal production.
Latest Patents
Kiyomi's latest patents include a process for producing nitride crystals and an apparatus for producing the same. The first patent describes a method to grow highly pure nitride crystals with low oxygen concentration using an ammonothermal method. This innovative process involves bringing a reactant gas that reacts with ammonia into contact with each other to prepare a mineralizer in a reactor. The nitride crystal is then grown in the presence of ammonia and the mineralizer.
The second patent outlines a production method for nitride crystals that prevents precipitation in areas other than the seed crystal. This method enhances the production efficiency of gallium nitride single crystals grown on the seed crystal. It specifies that the surfaces of the production vessel and components must be made from metals or alloys containing tantalum, tungsten, or titanium, with a surface roughness of less than 1.80 µm.
Career Highlights
Throughout her career, Kiyomi has worked with notable organizations such as Mitsubishi Chemical Corporation and Tohoku University. Her experience in these institutions has allowed her to develop and refine her innovative techniques in nitride crystal production.
Collaborations
Kiyomi has collaborated with esteemed colleagues, including Yutaka Mikawa and Yuji Kagamitani. These partnerships have contributed to her research and advancements in the field.
Conclusion
Makiko Kiyomi is a trailblazer in the production of nitride crystals, with her patents reflecting her commitment to innovation and efficiency. Her work continues to influence the materials science community and paves the way for future advancements in crystal production.