Location History:
- Hyogo, JP (2014 - 2015)
- Toyama, JP (2015 - 2021)
Company Filing History:
18 out of 13,307 
2 out of 16,453 
Years Active: 2014-2021
Title: The Innovative Contributions of Tsutomu Kiyosawa
Introduction: Tsutomu Kiyosawa, a prominent inventor based in Toyama, Japan, has made significant strides in the field of semiconductor technology. With an impressive portfolio of 20 patents, his work focuses on enhancing device characteristics and manufacturing processes within the semiconductor industry.
Latest Patents: Kiyosawa's latest patents demonstrate his expertise and innovative approach. One notable patent involves a semiconductor epitaxial wafer that suppresses variations in device characteristics in a plane parallel to its principal surface. This semiconductor epitaxial wafer comprises a semiconductor layer and a first conductivity type semiconductor epitaxial layer that contains a first conductivity type impurity. The correlation between the thickness distribution of the layer and the concentration of the impurity is crucial for device efficiency. Another significant patent pertains to a silicon carbide semiconductor element, which features a multilayer structure that optimizes conductivity and performance through a combination of different impurity concentrations. This innovation enhances the functionality and reliability of silicon carbide-based devices.
Career Highlights: Throughout his career, Tsutomu Kiyosawa has been associated with leading technology firms, including Panasonic Intellectual Property Management Co., Ltd. and Panasonic Corporation. His contributions to these organizations have significantly advanced the field of semiconductor technology, particularly in relation to efficiency and manufacturing techniques.
Collaborations: Kiyosawa has collaborated with notable industry professionals such as Yasuyuki Yanase and Atsushi Ohoka. These partnerships have fostered an environment of innovation, allowing for the development of cutting-edge technologies that address the evolving needs of the semiconductor sector.
Conclusion: Tsutomu Kiyosawa's contributions to semiconductor technology, reflected in his 20 patents and collaborations with industry leaders, underscore his role as a key innovator in the field. His work continues to influence advancements in device manufacturing and performance, paving the way for future innovations in semiconductors.