Location History:
- Omura, JP (2003)
- Hiratsuka, JP (1999 - 2006)
- Kanagawa, JP (1999 - 2009)
- Nagasaki, JP (2010)
Company Filing History:
6 out of 15 
5 out of 142 
2 out of 87 
Years Active: 1999-2010
Title: Innovations of Toshirou Kotooka
Introduction
Toshirou Kotooka is a prominent inventor based in Kanagawa, Japan. He holds a total of 14 patents, showcasing his significant contributions to the field of materials science, particularly in the manufacturing of silicon single crystals.
Latest Patents
One of his latest patents is an "Apparatus for pulling single crystal by CZ method." This invention involves a Czochralski (CZ) single crystal puller that is equipped with a cooler and a thermal insulation member. These components are designed to be disposed of in a CZ furnace, allowing for smooth recharge and additional charge of material. Furthermore, the apparatus facilitates the elimination of dislocations from a silicon seed crystal using the Dash's neck method. The design ensures that the cooler and thermal insulation member are moved upward away from the melt surface during critical processes.
Another significant patent is the "Method for manufacturing defect-free silicon single crystal." This method focuses on controlling the temperature gradient on the side surface of a silicon single crystal, the height of the solid-liquid interface, and the oxygen concentration in the longitudinal direction of the crystal. By employing a cylindrical cooler around the silicon single crystal and adjusting various parameters, the method aims to produce a defect-free silicon single crystal with a controlled oxygen concentration.
Career Highlights
Toshirou Kotooka has worked with notable companies such as Komatsu Denshi Kinzoku Kabushiki Kaisha and Komatsu Electronic Metals Co., Ltd. His experience in these organizations has contributed to his expertise in the field of semiconductor materials.
Collaborations
Throughout his career, Kotooka has collaborated with esteemed colleagues, including Makoto Kamogawa and Yoshiyuki Shimanuki. These partnerships have likely enriched his research and development efforts.
Conclusion
Toshirou Kotooka's innovative work in the field of silicon single crystal manufacturing has led to significant advancements, as evidenced by his numerous patents. His contributions continue to impact the industry positively.
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.