Location History:
- Ohmiya, JP (1987)
- Ohmiya-shi, Saitama, JP (1987 - 1988)
- Omiya, JP (1991 - 1992)
Company Filing History:
3 out of 255 
2 out of 68 
2 out of 1,530 
Years Active: 1987-1992
Title: Kenji Tomizawa: Innovator in Semiconductor Growth
Introduction
Kenji Tomizawa is a notable inventor based in Omiya, Japan, recognized for his contributions to the field of semiconductor technology. With a total of 6 patents to his name, Tomizawa has made significant advancements in the methods of growing single crystals and dissociative compound semiconductors.
Latest Patents
Tomizawa's latest patents include a method for monocrystalline growth of dissociative compound semiconductors. This invention relates to a method and apparatus for mono-crystalline growth based on the Czochralski method. The process involves preparing a first volatile component material and a second material of the dissociative compound semiconductor. The first material is placed at the bottom of an inner air-tight vessel, while the second material is contained in a crucible within the inner vessel. The first material is heated to evaporate and react with the second material, synthesizing the dissociative compound semiconductor. A single crystal is then pulled from the melt, with the process including precise measurements and corrections to ensure accurate growth.
Another significant patent is a method for growing single crystals, where a melt is prepared in a container with a cylindrical wall. A seed is immersed in the melt, and a single crystal rod is pulled in a coaxial manner. The method controls the temperature distribution at the melt surface to maintain the desired meniscus shape, ensuring the proper diameter of the single crystal rod.
Career Highlights
Throughout his career, Kenji Tomizawa has worked with prominent companies such as the Research Development Corporation of Japan and Mitsubishi Metal Corporation. His work has significantly impacted the semiconductor industry, particularly in the development of methods for crystal growth.
Collaborations
Tomizawa has collaborated with notable colleagues, including Koichi Sassa and Keiji Shirata, contributing to various advancements in semiconductor technology.
Conclusion
Kenji Tomizawa's innovative work in semiconductor growth has established him as a key figure in the field. His patents reflect a deep understanding of the complexities involved in crystal growth, paving the way for future advancements in technology.