Hiroaki Makino

Title: Hiroaki Makino: Innovator in Piezoelectric Technologies

Introduction

Hiroaki Makino, based in Aichi, Japan, is a prolific inventor known for his contributions to the field of piezoelectric technologies. With a total of nine patents to his name, Makino has made significant strides in developing devices that enhance performance and reliability in various applications.

Latest Patents

Among his latest innovations, Makino has developed a piezoelectric stack and a production method for this stack. The objective of this invention is to provide a piezoelectric stack that is substantially free from performance deterioration and possesses high reliability. To achieve this, the design incorporates a piezoelectric layer composed of PZT, along with an internal electrode layer arranged in an alternating stack. Specifically, the grain boundary-filling factor of a Pb-based glass within the crystal grain boundary of the piezoelectric layer is maintained at 95% or more. The production process involves stacking unfired sheets containing excess Pb beyond the stoichiometric ratio in PZT, which are then fired in an oxygen-rich atmosphere to meet these stringent specifications.

Additionally, Makino’s patent for a physical sensor showcases innovative technology where the pressure sensing layer changes its electrical resistance upon the application of stress. This layer features a glass matrix with dispersed electrically conductive particles, ideally containing RuO. The sensor is designed with electrical insulating layers on either side of the pressure sensing layer, enhancing its functionality and performance.

Career Highlights

Hiroaki Makino has held notable positions in esteemed organizations including Toyota Central R&D Labs, Inc. and Denso Corporation. His work in these companies has positioned him as a key contributor to advancements in automotive technology and sensing devices.

Collaborations

Throughout his career, Makino has collaborated with talented colleagues, including Nobuo Kamiya and Mitsuru Asai. Their joint efforts have further propelled innovation in the fields of sensor technology and piezoelectric devices.

Conclusion

With a strong portfolio of patents and a commitment to advancing technology, Hiroaki Makino continues to be a significant figure in the realm of innovations related to piezoelectric systems. His work not only addresses current technological challenges but also lays the groundwork for future advancements in this critical area of research.