Tomohiko Hashimoto

Title: Tomohiko Hashimoto: Innovator in Cu Core Ball Technology

Introduction

Tomohiko Hashimoto is a notable inventor based in Tochigi, Japan. He has made significant contributions to the field of materials science, particularly with his innovative Cu core ball technology. His work focuses on enhancing the reliability of electronic components, which is crucial in today's technology-driven world.

Latest Patents

Hashimoto holds a patent for a Cu core ball designed to prevent soft errors and reduce connection failures. This invention features a solder plating film on the surface of a copper ball, which can be made of either a Sn solder plating film or a lead-free solder alloy primarily composed of Sn. The solder plating film is engineered to contain uranium (U) and thorium (Th) at levels of 5 ppb or less. The Cu ball itself boasts a purity of not less than 99.9% and not more than 99.995% copper, with lead (Pb) and/or bismuth (Bi) contents totaling 1 ppm or more. Additionally, the sphericity of the ball is 0.95 or more, and it achieves an α dose of 0.0200 cph/cm or less.

Career Highlights

Hashimoto is currently employed at Senju Metal Industry Co., Ltd., where he continues to develop innovative solutions in the field of electronics. His expertise in materials science has positioned him as a key player in the industry, contributing to advancements that enhance the performance and reliability of electronic devices.

Collaborations

Throughout his career, Hashimoto has collaborated with talented individuals such as Hiroyoshi Kawasaki and Atsushi Ikeda. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Tomohiko Hashimoto's contributions to the field of materials science, particularly through his Cu core ball invention, highlight his role as an influential inventor. His work not only addresses critical issues in electronic reliability but also showcases the importance of innovation in technology.