Location History:
- Yokohama, JP (1992)
- Tokyo, JP (1994)
Company Filing History:
Years Active: 1992-1994
Title: Yasumitsu Nakahama: Innovator in Silicon Crystal Manufacturing
Introduction
Yasumitsu Nakahama is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of silicon crystal manufacturing, holding a total of 3 patents. His work focuses on improving the efficiency and quality of silicon single crystal production.
Latest Patents
One of Nakahama's latest patents is a silicon single crystal manufacturing apparatus. This apparatus is designed to create a silicon single crystal that is large in diameter using the Czochralski process. It features appropriate openings on the warmth keeping cover to prevent undesirable influences caused by atmospheric gas. The design ensures that the sum of the areas of the openings is larger than the area of the gap formed between the lower end of the warmth keeping cover and the level of the silicon solution. Additionally, both the warmth keeping cover and the heat insulating member are composed of sheet metal.
Another significant patent is the manufacturing method and equipment of a single silicon crystal. This invention involves partitioning the inside of a crucible with a partition ring, allowing the pulled single crystal to be surrounded while facilitating the movement of molten raw material. The method maintains the molten liquid surface at a constant level and ensures that the temperature outside the partition ring is at least 10 degrees Celsius higher than that inside.
Career Highlights
Throughout his career, Yasumitsu Nakahama has worked with prominent companies such as NKK Corporation and Toshiba Ceramics Co., Ltd. His experience in these organizations has contributed to his expertise in silicon crystal technology.
Collaborations
Nakahama has collaborated with notable coworkers, including Hiroshi Kamio and Kenji Araki. Their combined efforts have further advanced the field of silicon manufacturing.
Conclusion
Yasumitsu Nakahama's innovative work in silicon crystal manufacturing has led to significant advancements in the industry. His patents reflect a deep understanding of the complexities involved in producing high-quality silicon crystals.