Hitachi Metals, Ltd.

Shiro Murakami

Juro Endo

Shigeo Fujii

Masayuki Nakao

Yukiharu Takada

Yoshiharu Koike

Tsutomu Iimura

Satoru Tanaka

Norikazu Koyuhara

Yoshio Igarashi

Shigeru Oguma

Makoto Kadowaki

Yoshihito Yoshikawa

A ferrite core for use in coupling transformers and distributing transformers in CATV equipments such as couplers, distributors and amplifiers, the ferrite core being made of a ferrite having a saturation magnetostriction |&#x3bb;| of 8&#xd7;10or less in an absolute value and an initial permeability &#x3bc;of 300 or more.

Ferrite core, CATV equipment and bi-directional CATV system

A magnetic recording device comprises a magnetic disk having a magnetic recording layer formed on a substrate, a slider, a magnetic core attached to the slider, and a magnetic head adapted to be brought into contact with and separated from the surface of the magnetic disk. In this magnetic recording device, the magnetic recording layer of the magnetic disk is made of a Co-based alloy and the slider of the magnetic head has stabilized zirconia as the main phase thereof.

Magnetic head having a stabilized zirconia slider

A magnetic recording medium has a magnetic film formed on the surface of a substrate and a protective film further formed on the surface of the magnetic film. The protective film is composed of a first layer containing at least one substance selected from the group consisting of Cr.sub.2 O.sub.3, Si, and Ge and a second layer of amorphous carbon or graphite containing amorphous carbon deposited on the front side of the first layer.

Magnetic recording medium

Magnetic recording device having a stabilized zirconia slider and a

A manufacturing process of Co-Ni magnetic recording media by sputtering Co-Ni thin film layer on a substrate in Argon atomsphere including nitrogen and heating the thin film to evaporate nitrogen from the thin film to prepare the magnetic recording media appropriate for high density longitudinal recording, wherein on sputtering the substrate is maintained at a temperature of room temperature to 300.degree. C.

Process for manufacturing magnetic recording medium

A manufacturing process of Co-Ni magnetic recording media by sputtering Co-Ni thin film layer on a substrate in Argon atmosphere including oxygen or air and heating the thin film to evaporate oxygen or air from the layer to prepare the magnetic recording media appropriate for high density longitudinal recording, wherein on sputtering the substrate is maintained at a temperature of room temperature to 300.degree. C.

Method of manufacturing a magnetic media

Growing community of inventors

Saitama, Japan

Shiro Murakami