Company Filing History:
Years Active: 2000-2003
Title: Shun-ichi Narumi: Innovator in Magnetic Disk Technology
Introduction
Shun-ichi Narumi is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of magnetic disk technology, holding a total of 12 patents. His work has been instrumental in advancing the efficiency and performance of magnetic disk apparatuses.
Latest Patents
One of Narumi's latest patents is for a magnetic disk apparatus featuring a magnetic head with upper and lower magnetic cores made from an electroplated thin film. This innovative design includes a magnetic disk for recording information and a magnetic head that consists of a reproducing head and a recording head. The reproducing head is composed of a lower shield film, a magnetoresistive film, a pair of electrodes, and an upper shield. The recording head includes an upper magnetic core, a lower magnetic core, and a coil situated between the two cores. Notably, the upper and lower magnetic cores are made from an electroplated thin film with an average crystal grain size smaller than 500 Å, utilizing a Ni–Fe alloy with specific weight percentages of nickel and iron.
Another significant patent involves a magnetoresistive effect type reproducing head. This head features a lower magnetic shield and an upper magnetic shield, both made of magnetic material. The design includes a magnetoresistive effect type element positioned between the two shields, along with inter-layer insulating films. The innovative aspect of this patent lies in the use of different materials for the magnetic layers, enhancing the overall performance of the reproducing head.
Career Highlights
Shun-ichi Narumi is associated with Hitachi, Ltd., a leading company in technology and innovation. His work has not only contributed to the company's advancements but has also set new standards in the industry.
Collaborations
Throughout his career, Narumi has collaborated with notable colleagues, including Moriaki Fuyama and Hiroshi Fukui. These partnerships have fostered a creative environment that has led to groundbreaking innovations in magnetic disk technology.
Conclusion
Shun-ichi Narumi's contributions to magnetic disk technology exemplify the impact of innovative thinking in the field of electronics. His patents reflect a commitment to advancing technology and improving the efficiency of data storage solutions.