Harunobu Koike

Title: Innovations of Harunobu Koike: A Pioneer in Piezoelectric Technology

Introduction

Harunobu Koike is an acclaimed inventor based in Matsumoto, Japan, who holds an impressive portfolio of 16 patents. His innovative contributions significantly enhance the field of piezoelectric technology, showcasing his expertise and creativity in the development of advanced electronic components.

Latest Patents

Among his latest inventions is a patented Method for Producing Piezoelectric Actuator, which details a sophisticated approach to crafting a piezoelectric actuator. This method involves the formation of a vibration plate through a single-layer forming step that includes creating a metal layer containing zirconium via a gas phase method, followed by firing this metal layer to form a metal oxide layer. The innovation lies in the repeated layering process, resulting in a vibration plate composed of stacked metal oxide layers, each with a thickness of less than 200 nm.

Another notable patent is his work on a Liquid Ejecting Head, Liquid Ejecting Apparatus, and Actuator. This invention integrates a piezoelectric element and a vibrating plate that operates in response to the element's actuation. The design features a unique structure where the vibrating plate comprises a first layer containing silicon dioxide (SiO) and a second layer containing zirconium dioxide (ZrO). The second layer intriguingly incorporates a first impurity element, differing from zirconium, with a concentration gradient that increases towards the interface with the first layer.

Career Highlights

Throughout his career, Harunobu Koike has been associated with esteemed companies in the technology sector, including Seiko Epson Corporation. His work has played a crucial role in advancing piezoelectric applications within the company's product offerings, further solidifying his status as an influential inventor in the field.

Collaborations

Koike has collaborated with notable colleagues such as Masao Nakayama and Toshihiro Shimizu, whose collective efforts have fostered advancements in technology and innovation. Their teamwork exemplifies the spirit of collaboration in research and product development.

Conclusion

Harunobu Koike's innovative spirit and dedication to advancing piezoelectric technology are evident through his numerous patents and contributions to the field. His latest inventions reflect a forward-thinking approach that continues to inspire future innovations in electronics. As he builds on his impressive portfolio, the impact of his work will likely resonate in the technology landscape for years to come.