Yasuo Tomioka

Title: Yasuo Tomioka: Innovator in Copper-Alloy Foil Technology

Introduction

Yasuo Tomioka is a notable inventor based in Ibaraki, Japan. He has made significant contributions to the field of materials science, particularly in the development of copper-alloy foils. With a total of 3 patents to his name, Tomioka's work has implications for various high-tech applications.

Latest Patents

One of Yasuo Tomioka's latest patents is a copper-alloy foil designed for use in laminate sheets. This innovative foil achieves a 180° peeling strength of 5.0N/cm or more when thermally fusion-bonded with liquid crystal polymer. The composition of the foil includes one or more elements, specifically from 0.01 to 2.0% of chromium (Cr) and from 0.01 to 1.0% of zirconium (Zr). Additionally, the outermost surface features an oxide layer and, in some cases, a rust-proof film that is 10 nm or less in thickness. The electrical conductivity of this foil is measured at 50% IACS.

Another significant patent by Tomioka involves a copper-alloy foil intended for use as a suspension member in hard disk drives. This invention showcases his expertise in creating materials that enhance the performance and reliability of electronic devices.

Career Highlights

Yasuo Tomioka is currently employed at Nippon Mining & Metals Co., Ltd., where he continues to innovate in the field of materials. His work has not only advanced the technology of copper-alloy foils but has also contributed to the broader field of electronics and materials engineering.

Collaborations

Throughout his career, Tomioka has collaborated with esteemed colleagues, including Tetsuo Maki and Naohiko Era. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Yasuo Tomioka's contributions to the field of copper-alloy foils demonstrate his commitment to advancing technology in materials science. His patents reflect a deep understanding of the properties and applications of these materials, making him a valuable asset in the industry.