Location History:
- Saga, JP (2000 - 2002)
- Kohoku-machi, JP (2002)
- Kishima-gun, JP (2007)
Company Filing History:
4 out of 929 
1 out of 90 Years Active: 2000-2007
Title: Tokuji Maeda: Innovator in Single Crystal Technology
Introduction
Tokuji Maeda is a notable inventor from Kishima-gun, Japan, recognized for his contributions to the field of single crystal technology. With a total of 5 patents to his name, Maeda has made significant advancements that enhance the quality and efficiency of single crystal production.
Latest Patents
One of Maeda's latest patents is a method for pulling a single crystal. This innovative apparatus maintains a constant flow of inert gas, pressure, and temperature environment, ensuring high-quality single crystals can be produced despite variations in the quartz crucible's volume and thermal deformation. The apparatus features a reference reflector, a level position measuring unit utilizing a one-dimensional CCD camera, and a control system that adjusts the crucible ascent speed to maintain the desired melt level.
Another significant patent is a method for producing single crystals using the Czochralski (CZ) method. This technique allows for stable pulling at the fastest possible rate while controlling crystal deformation and suppressing defect density. The method involves calculating a correction for the pulling rate based on deviations from the aimed value of crystal deformation, ensuring optimal quality in the final product.
Career Highlights
Throughout his career, Tokuji Maeda has worked with prominent companies such as Sumitomo Metal Industries, Inc. and Sumitomo Mitsubishi Silicon Corporation. His experience in these organizations has contributed to his expertise in single crystal technology and innovation.
Collaborations
Maeda has collaborated with notable coworkers, including Keiichi Takanashi and Ken Hamada. Their combined efforts have further advanced the field of single crystal production.
Conclusion
Tokuji Maeda's innovative work in single crystal technology has led to significant advancements in the industry. His patents reflect a commitment to improving the quality and efficiency of crystal production, making him a key figure in this specialized field.