Sunao Yonekawa

Title: Sunao Yonekawa: Innovator in Magnetic Head Technology

Introduction

Sunao Yonekawa is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of magnetic head technology, holding a total of 3 patents. His work focuses on enhancing the performance and reliability of magnetic disk drives.

Latest Patents

Yonekawa's latest patents include innovative designs for magnetic head sliders and magnetic disk drives. One of his notable inventions is a magnetic head slider that helps prevent excessive frictional force during contact with a magnetic disk. This design suppresses vibration of the slider, ensuring smoother operation. The air bearing surface of the magnetic head slider features a deep groove and a shallow-trench rail, along with strategically placed pads to optimize performance.

Another significant patent addresses the structure of magnetic disk devices. This invention introduces a design that prevents deformation of the device housing by utilizing a bimetal effect. The magnetic disk unit includes a base and a top cover made from materials with differing thermal expansion coefficients, which work together to maintain structural integrity.

Career Highlights

Sunao Yonekawa is currently employed at Hitachi Global Storage Technologies Netherlands B.V. His work at this company has allowed him to develop cutting-edge technologies that enhance the functionality of magnetic storage devices. His innovative approach has positioned him as a key player in the industry.

Collaborations

Throughout his career, Yonekawa has collaborated with notable colleagues, including Hiroshi Tani and Hiroaki Shigenaga. These partnerships have contributed to the advancement of technology in the field of magnetic storage.

Conclusion

Sunao Yonekawa's contributions to magnetic head technology have made a significant impact on the industry. His innovative patents and collaborative efforts continue to drive advancements in magnetic disk technology.