Company Filing History:
1 out of 10,264 
1 out of 2 Years Active: 1984-1986
Title: Masayoshi Tatsumi: Innovator in Semiconductor Technology
Introduction
Masayoshi Tatsumi is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 2 patents. His innovative work has had a lasting impact on the industry.
Latest Patents
Tatsumi's latest patents include a "Semiconductor Boule Pulling Rod" and a "Voltage and Electric Field Measuring Device Using Light." The semiconductor boule pulling rod is designed for pulling a boule from a melt utilizing the Czochralski method. It features a main pulling rod and a heat insulating layer surrounding it. The main pulling rod can be bar-shaped or consist of two concentric pipes, which are forcibly cooled. A pipe made of molybdenum or stainless steel is preferably provided around the heat insulating material. The voltage and electric field measuring device employs light as an operating parameter. It consists of an electro-optic crystal, a quarter-wave plate, and a polarization analyzer arranged in sequence in the direction of the applied light. A voltage can be applied to the electro-optic crystal through electrodes arranged on it, and the crystal belongs to a cubic system, such as bismuth silicon oxide or bismuth germanium oxide.
Career Highlights
Throughout his career, Tatsumi has worked with notable companies, including Sumitomo Electric Industries, Limited and Sumitomo Electric Industrial Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in semiconductor technology.
Collaborations
Tatsumi has collaborated with esteemed colleagues such as Koji Tada and Hirokuni Nanba. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Masayoshi Tatsumi is a distinguished inventor whose work in semiconductor technology continues to influence the industry. His patents reflect his commitment to innovation and excellence in his field.