Tsutomu Yamakawa

Title: The Innovations of Tsutomu Yamakawa

Introduction

Tsutomu Yamakawa is a prominent inventor based in Saitama, Japan. He has made significant contributions to the field of electronics, particularly in the development of surface mount type crystal oscillators. With a total of eight patents to his name, Yamakawa's work has had a lasting impact on the industry.

Latest Patents

One of Yamakawa's latest patents involves a surface mount crystal oscillator. This innovative device comprises a crystal blank, an integrated circuit (IC) chip with an oscillation circuit, and a hermetic package that houses both components. The hermetic package features a rectangular ceramic substrate with a metal film on one surface and a concave metal cover that is bonded to the metal film. The IC chip is secured to the ceramic substrate using ultrasonic thermo-compression bonding, while the crystal blank is positioned above the IC chip. The design ensures that the ceramic substrate has a flat surface, enhancing the overall functionality of the oscillator.

Career Highlights

Yamakawa has dedicated his career to advancing technology in the field of electronics. He is currently employed at Nihon Dempa Kogyo Co., Ltd., where he continues to innovate and develop new technologies. His expertise in crystal oscillators has positioned him as a key figure in the industry.

Collaborations

Throughout his career, Yamakawa has collaborated with notable colleagues, including Kouichi Moriya and Hidenori Harima. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Tsutomu Yamakawa's contributions to the field of electronics, particularly through his patents on surface mount type crystal oscillators, highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.