Location History:
- Kawasaki, JP (1997)
- Chiba, JP (2005 - 2006)
- Futtsu, JP (2008)
- Tokyo, JP (2018 - 2019)
Company Filing History:
5 out of 3,542 
3 out of 3 
1 out of 3 Years Active: 1997-2019
Title: Hitoshi Dohnomae: Innovator in Silicon Refining Technology
Introduction
Hitoshi Dohnomae is a prominent inventor based in Chiba, Japan, known for his significant contributions to the field of silicon refining technology. With a total of eight patents to his name, Dohnomae has developed innovative methods and devices that enhance the production of high-purity silicon, which is essential for various industrial applications, including solar cell manufacturing.
Latest Patents
Dohnomae's latest patents include a silicon refining device designed for the industrial production of high-purity silicon through vacuum melting. This device boasts a high phosphorus removal rate, ensuring high productivity while maintaining cost-effectiveness with a simple and economical configuration. The device features a decompression vessel equipped with a vacuum pump, a crucible for containing metal silicon material, a heating device for the crucible, and a thermal insulation member that covers the molten silicon surface. This insulation member is constructed from a laminated material that provides radiant heat insulation through its multilayer structure.
Another notable patent involves a method for manufacturing highly pure silicon through unidirectional solidification of molten silicon. This method allows for the economical and industrial production of silicon with low oxygen and carbon concentrations, making it suitable for solar cell applications. The process utilizes molten silicon containing specific concentrations of carbon and germanium as raw materials, resulting in highly pure silicon that meets industry standards.
Career Highlights
Throughout his career, Hitoshi Dohnomae has worked with reputable companies, including Nippon Steel Corporation and Silicio Ferrosolar S.L. His experience in these organizations has contributed to his expertise in silicon refining and manufacturing processes.
Collaborations
Dohnomae has collaborated with notable colleagues such as Wataru Ito and Tadashi Sakon, further enhancing his innovative work in the field of silicon technology.
Conclusion
Hitoshi Dohnomae's contributions to silicon refining technology have made a significant impact on the industry. His innovative patents and methods continue to advance the production of high-purity silicon, supporting the growth of renewable energy technologies.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.