Shigeo Fujita

Title: Shigeo Fujita: Innovator in Magnetic-Recording Technology

Introduction

Shigeo Fujita is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of magnetic-recording technology, holding a total of 3 patents. His work has advanced the design and functionality of magnetic heads used in data storage devices.

Latest Patents

Fujita's latest patents include a head-slider that features a thin-film magnetic-recording head designed to reduce thermal protrusion. This innovative head-slider comprises a slider and a thin-film magnetic-recording head, which includes a read element, a write element, and a non-magnetic insulating protective layer surrounding both elements. Additionally, it incorporates a resist positioned further from the air-bearing surface than the read element, along with a hard-material member made from silicon carbide or tungsten. The design ensures that both the resist and hard-material member overlap the write element when viewed in a stacking direction, optimizing performance.

Another significant patent is the CPP structure magnetoresistive head. This invention features a magnetoresistive sensor film situated between lower and upper shield layers. The sensor film is constructed from a pinning layer, a first ferromagnetic layer, an intermediate layer, and a second ferromagnetic layer. A sense current flows through the interface between the intermediate and second ferromagnetic layers, allowing for the detection of resistance changes in response to external magnetic fields. This design enhances the efficiency and reliability of magnetoresistive heads.

Career Highlights

Fujita has worked with prominent companies in the technology sector, including HGST Netherlands and Hitachi Global Storage Technologies Netherlands. His experience in these organizations has contributed to his expertise in magnetic-recording technologies and innovations.

Collaborations

Throughout his career, Fujita has collaborated with esteemed colleagues such as Katsuro Watanabe and Takayoshi Ohtsu. These partnerships have fostered a creative environment that has led to groundbreaking advancements in the field.

Conclusion

Shigeo Fujita's contributions to magnetic-recording technology through his patents and collaborations have significantly impacted the industry. His innovative designs continue to influence the development of data storage solutions.