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Title: Kiyoshi Nakamura: Innovator in Bulk Wave Resonators
Introduction
Kiyoshi Nakamura is a notable inventor based in Sendai, Japan. He has made significant contributions to the field of acoustic technology, particularly in the development of bulk wave resonators and piezoelectric devices. With a total of 2 patents, his work addresses critical challenges in frequency passband and harmonic vibration suppression.
Latest Patents
Nakamura's latest patents include a bulk wave resonator and a bandpass filter. The bulk wave resonator aims to provide a high-frequency passband by utilizing a support substrate and an acoustic multilayer film. This film consists of various dielectrics with different acoustic impedances, layered to enhance performance. The piezoelectric layer, positioned above the acoustic multilayer film, is equipped with electrodes that generate bulk waves through applied voltage. This innovative design allows for effective thickness shear vibration in a defined direction, optimizing the resonator's functionality.
Another significant invention is the piezoelectric vibrator designed to suppress harmonic vibrations of lower orders. This device features main electrodes on a piezoelectric substrate, complemented by sub electrodes placed nearby. The configuration ensures that the loop frequencies of the resonator align, effectively minimizing unwanted harmonic vibrations.
Career Highlights
Throughout his career, Kiyoshi Nakamura has worked with various companies, including Siward Technology Co., Ltd. His experience in these organizations has contributed to his expertise in acoustic technologies and patent development.
Collaborations
Nakamura has collaborated with notable colleagues such as Hiroshi Hasegawa and Masashi Iwata. Their combined efforts have further advanced the field of piezoelectric devices and resonators.
Conclusion
Kiyoshi Nakamura's innovative work in bulk wave resonators and piezoelectric technology showcases his commitment to solving complex engineering challenges. His contributions continue to influence the industry and inspire future advancements in acoustic technology.
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