This inventor holds 8 USPTO granted patents and 1 published patent application. Top assignees: Tama Chemicals Co., Ltd., Moses Lake Industries, Inc., Kabushiki Kaisha Toshiba. Active years: 1986-2005.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Moses Lake, WA (US) (1987 - 1990)
- Tokyo, JP (1995 - 1996)
- Kawasaki, JP (1986 - 2005)
Company Filing History:
5 out of 16 
2 out of 7 
1 out of 53,276 
Years Active: 1986-2005
Title: Innovations by Shumpei Shimizu in Metal Polishing Compositions
Introduction
Shumpei Shimizu, an accomplished inventor based in Kawasaki, Japan, has made significant contributions to the field of metal polishing technology. With a total of eight patents, he has been at the forefront of developing innovative solutions for various polishing compositions.
Latest Patents
Some of Shimizu's latest patents include the following: Copper-Based Metal Polishing Composition, Method for Manufacturing a Semiconductor Device, Polishing Composition, Aluminum-Based Metal Polishing Composition, and Tungsten-Based Metal Polishing Composition. The copper-based metal polishing composition, in particular, enables the polishing of copper or its alloys without dissolution in the immersing solution, allowing for high-rate polishing treatment. This composition includes a water-soluble first organic acid that reacts with copper to form a water-insoluble copper complex compound, alongside an abrasive grain, an oxidizing agent, and water, ensuring effective polishing processes.
Career Highlights
Shumpei Shimizu has worked with notable companies such as Tama Chemicals Co., Ltd. and Moses Lake Industries, Inc. His expertise in the field has not only led to his numerous innovations but has also contributed to advancements in semiconductor manufacturing and metal polishing industries.
Collaborations
Throughout his career, Shimizu has collaborated with talented professionals, including Toshitsura Cho and Hideaki Hirabayashi. These partnerships have significantly enhanced his inventive capacity and broadened the scope of his patented technologies.
Conclusion
Shumpei Shimizu's work in developing cutting-edge polishing compositions highlights his role as a leading inventor in the technology sector. His patents demonstrate a commitment to innovation, particularly in enhancing the efficiency and effectiveness of metal polishing processes. With a solid foundation in both research and practical applications, Shimizu continues to influence the industry with his groundbreaking inventions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile