Ibaraki, Japan

Yoshikazu Kumahara

This inventor holds 2 USPTO granted patents. Top assignees: Japan Energy Corporation, Nikko Materials Company, Limited. Active years: 2000-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshikazu Kumahara. Retrieved from https://idiyas.com/inventor/yoshikazu-kumahara

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 2

Forward Citations = 15(Granted Patents)


Company Filing History:


Years Active: 2000-2002

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2 patents (USPTO):Explore Patents

Title: Innovations of Yoshikazu Kumahara

Introduction

Yoshikazu Kumahara is a notable inventor based in Ibaraki-ken, Japan. He has made significant contributions to the field of sputtering targets, with a focus on improving manufacturing processes and product quality. With a total of 2 patents, his work has garnered attention in the industry.

Latest Patents

Kumahara's latest patents include a sputtering target designed to minimize cracking during the bonding process to a backing plate. This invention addresses the challenges posed by differences in the coefficient of thermal expansion, particularly in ceramic target manufacturing. His second patent focuses on an ITO sputtering target and a cleaning method that effectively removes ground powder from the target surface. This cleaning process is crucial for preventing the production of nodules and particles during sputtering, ensuring a cleaner and more efficient operation.

Career Highlights

Throughout his career, Kumahara has worked with prominent companies such as Japan Energy Corporation and Nikko Materials Company, Limited. His experience in these organizations has contributed to his expertise in the field of sputtering technology.

Collaborations

Kumahara has collaborated with notable colleagues, including Toru Saito and Katsuya Kuboyama. Their combined efforts have further advanced the innovations in sputtering technology.

Conclusion

Yoshikazu Kumahara's contributions to the field of sputtering targets demonstrate his commitment to innovation and quality improvement. His patents reflect a deep understanding of the challenges in manufacturing processes, making him a valuable figure in the industry.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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