Location History:
- Sakai, JP (1988)
- Kunitachi, JP (1987 - 1989)
- Kanagawa, JP (1994)
- Kawasaki, JP (1991 - 1995)
- Yokohama, JP (1998)
- Futtsu, JP (2008)
- Tokyo, JP (1987 - 2011)
Company Filing History:
12 out of 52,735 
2 out of 3,557 
2 out of 19 
Years Active: 1987-2011
Title: **Masaki Okajima: Innovator in High Purity Silicon Production**
Introduction
Masaki Okajima, an accomplished inventor based in Kawasaki, Japan, has made significant contributions to the field of silicon production, as evidenced by his impressive portfolio of 17 patents. His innovative work focuses on creating efficient systems for producing high purity silicon, essential for various applications, especially in renewable energy technologies.
Latest Patents
Among his latest patents, two notable inventions stand out. The first is a **High Purity Silicon Production System and Production Method**, which introduces a process for producing high purity silicon with a purity of 6N or more, particularly suited for solar battery applications. This innovative method utilizes inexpensive metallurgical grade silicon and the slag refining technique, making it economically viable for industrial-scale production. The system incorporates direct electromagnetic induction heating, which heats the molten silicon in the crucible. The crucible is constructed from oxidation-resistant materials to enhance its durability during the process.
The second recent patent is a **Method of Refining Silicon** that focuses on improving the quality of low purity silicon by efficiently removing boron impurities. This method involves introducing specific materials into the molten silicon to form slag that helps enhance the purity levels, thereby promoting cost-effective production for solar battery materials.
Career Highlights
Masaki Okajima has built a notable career, working with esteemed companies within the industry. He contributed his expertise to leading organizations such as Toshiba Corporation and Nippon Steel Corporation, where he further developed his skills and knowledge in silicon production technology.
Collaborations
Throughout his career, Okajima has collaborated with skilled professionals including Genichi Hatakoshi and Koichi Nitta. These partnerships have fostered an environment of innovation and have led to groundbreaking advancements in the technologies he has developed.
Conclusion
Masaki Okajima exemplifies the spirit of innovation in the field of silicon production, with 17 patents that demonstrate his commitment to advancing technology for sustainable applications. His contributions, particularly in developing economically viable methods for high purity silicon production, position him as a key figure in the ongoing evolution of materials science and renewable energy technologies.