Location History:
- Tokyo, JP (1991 - 1992)
- Gorikida, JP (1995)
Company Filing History:
4 out of 4 
1 out of 189 
1 out of 7 Years Active: 1991-1995
Title: Tateo Kusama: Innovator in Semiconductor Technology
Introduction
Tateo Kusama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 4 patents. His work focuses on methods and apparatuses that enhance the evaluation and measurement of semiconductor materials.
Latest Patents
Kusama's latest patents include a "Method of evaluating lifetime of semiconductor material and apparatus." This innovative method allows for the non-contact and non-destructive evaluation of the lifetime of a surface thin-layer portion of semiconductor materials. By radiating light within a short-wavelength region onto the surface, carriers are generated effectively, enabling the measurement of the carrier decay curve. This evaluation is crucial for assessing the quality of semiconductor devices formed from epitaxial wafers or thin device-forming materials.
Another notable patent is the "Method and apparatus for measuring lifetime of semiconductor material." This invention measures the lifetime of semiconductor materials with specific resistivity values. By utilizing microwave energy and varying the equivalent distribution circuit characteristics of the waveguide, Kusama's method achieves a linear relationship between the magnitude of reflective microwave energy and the resistivity of the semiconductor material. This advancement allows for accurate lifetime measurements based on the attenuation of produced carriers.
Career Highlights
Throughout his career, Kusama has worked with notable companies such as Semitex Co., Ltd. and Toshiba Ceramics Co., Ltd. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Kusama has collaborated with esteemed colleagues, including Yoshio Kirino and Kunio Iba. These partnerships have fostered a collaborative environment that encourages innovation and the advancement of semiconductor technologies.
Conclusion
Tateo Kusama's contributions to semiconductor technology through his patents and collaborations highlight his role as a leading inventor in the field. His innovative methods for evaluating and measuring semiconductor materials continue to impact the industry positively.