Mitsuyoshi Matsuda

Title: Mitsuyoshi Matsuda: Innovator in Electrolytic Copper Foil Technology

Introduction

Mitsuyoshi Matsuda is a prominent inventor based in Saitama, Japan, known for his innovative contributions to the field of electrochemical engineering. With a remarkable portfolio of 8 patents, he has made significant strides in the development of advanced copper materials suitable for flexible substrates and improved processing capabilities.

Latest Patents

Among his latest patents, Matsuda has developed an electrodeposited copper foil that boasts high smoothness and flexibility, particularly after being annealed at 180° C. for one hour. This electro-deposited copper foil exhibits an impressive surface roughness parameter (Rz) ranging from 0.1 to 2.0 μm. Furthermore, a detailed cross-sectional analysis using EBSD revealed that the copper crystal grains meeting specific conditions occupy at least 63% of the observation field. These conditions include a (101) orientation, an aspect ratio of 0.500 or less, a |sin θ| value between 0.001 and 0.707, and a minor axis length of 0.38 μm or smaller when approximated elliptically. Additionally, he holds a patent for an electro-deposited copper-alloy foil that demonstrates excellent infrared laser processability, which ensures a uniform etching rate throughout its thickness, containing a tin content ranging from 8% to 25% by mass.

Career Highlights

Matsuda has made significant advancements in materials science during his tenure at Mitsui Mining & Smelting Company, Ltd. His work primarily focuses on improving the properties and applications of copper materials in modern electronics. The innovative copper foils he has developed are integral to the manufacturing of flexible electronic substrates, significantly enhancing device performance and reliability.

Collaborations

Throughout his career, Matsuda has collaborated with esteemed colleagues such as Makoto Dobashi and Hisao Sakai. These partnerships have fostered an environment of innovation, enabling the team to push the boundaries of electrochemical applications and material science, leading to several patented technologies.

Conclusion

Mitsuyoshi Matsuda continues to impact the field of materials engineering significantly. His work on electrolytic copper foils not only serves the needs of the electronics industry but also sets new standards in material performance and processing. With ongoing research and potential future innovations, Matsuda remains a key figure in the advancement of electrochemical technologies.