Tetsu Yamamoto

Title: Tetsu Yamamoto: Innovator in Hydroxystyrene Polymers

Introduction

Tetsu Yamamoto is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the development of acid-labile group protected hydroxystyrene polymers.

Latest Patents

Yamamoto holds a patent for "Acid-labile group protected hydroxystyrene polymers or copolymers." This invention includes polymers that feature recurrent pendant groups such as 1-(2-methanecarbonyl oxyethoxy)ethoxy group and 1-(2-N-methylcarbamatoethoxy) ethoxy group. The resist containing this polymer, along with a photo acid generator, a base, additives, and a solvent, demonstrates sensitivity to UV, electron beam, and X-ray. During irradiation, acid is formed in the exposed area, which catalytically deprotects the acid-labile group during post-exposure baking. Positive patterns are formed after development using an alkaline solution.

Career Highlights

Yamamoto is currently employed at Clariant AG, where he continues to innovate in the field of polymer chemistry. His work has implications for various applications, particularly in the electronics industry.

Collaborations

Yamamoto has collaborated with notable colleagues, including Munirathna Padmanaban and Georg Pawlowski, contributing to advancements in their shared field of expertise.

Conclusion

Tetsu Yamamoto's work in hydroxystyrene polymers showcases his innovative spirit and dedication to advancing polymer technology. His contributions are valuable to both academia and industry, highlighting the importance of research and development in this field.