Hisashi Yamasaki

Title: Hisashi Yamasaki: Innovator in Magnetic Technologies

Introduction

Hisashi Yamasaki is a renowned inventor located in Kawasaki, Japan. With a remarkable portfolio of 5 patents, Yamasaki has made significant contributions to the field of magnetic technologies, particularly in developing advanced magnetic recording mediums and heads. His innovative ideas and designs have paved the way for higher recording densities and improved performance in various applications.

Latest Patents

Hisashi Yamasaki's latest patents showcase his expertise in magnetic technology. One noteworthy invention is the thin film magnetic head, which consists of an upper and lower magnetic core film laminated through a magnetic gap layer. Each of these multilayer thin films is composed of a series of alternating magnetic and non-magnetic thin film layers, achieving single domain structures. This innovative design ensures a thin film magnetic head with high permeability at high frequencies, resulting in improved high-frequency characteristics and increased recording density.

Another significant patent involves a magnetic recording medium that incorporates a non-magnetic metal primary layer along with a thin ferromagnetic alloy layer. This layer is created by sputtering onto a non-magnetic substrate. It consists of specific percentages of chromium, platinum, and a selection of metals including tantalum, hafnium, tungsten, zirconium, and niobium, with cobalt as the balance. This magnetic recording medium demonstrates a coercive force exceeding 1500 Oe and a squareness ratio greater than 0.85, marking a substantial advancement in magnetic recording technology.

Career Highlights

Yamasaki has had an illustrious career working with prominent companies in the electronics and technology sectors, including Fuji Electric Co., Ltd. and Toshiba Tungaloy Co., Ltd. His positions in these organizations have allowed him to contribute to groundbreaking projects and collaborate with fellow inventors and engineers.

Collaborations

Throughout his career, Hisashi Yamasaki has collaborated with several talented individuals, including coworkers Yuko Arimoto and Tsutomu Mashimo. These partnerships have fostered an environment of creativity and innovation, leading to many of his successful patents and technological advancements.

Conclusion

Hisashi Yamasaki stands out as a pioneering inventor in the field of magnetic technologies. His contributions through innovative patents have not only advanced the technology in recording mediums and heads but also enhanced performance across various applications. Yamasaki's ongoing dedication to research and development continues to shape the landscape of magnetic technology.