Hitachi, Ltd.

Kawasaki Jukogyo Kabushiki Kaisha

Nippon Shokubai Kagaku Kogyo Co., Ltd.

Hitachi Global Storage Technologies Japan, Ltd.

Toshio Tamura

Hideo Yamakura

Koji Tanaka

Kenji Furusawa

Yuji Ochiai

Hiromu Chiba

Hideaki Tanaka

Toshihiko Nakata

Hideaki Sasazawa

Kiyoshi Yamaguchi

Tsuneo Tsubakimoto

Hiroya Kobayashi

Naoki Maki

Takateru Seki

Takakiyo Goto

Akio Takakura

Kenji Rakutani

Hayami Ito

Shoichi Takao

Shuhei Tatsumi

Toshio Takahashi

Minoru Yamasaka

Shigeo Aikawa

Yoshihiro Kajibata

Akio Nakaishi

Minako Morisato

A thin-film includes an inductive element and a first and second magneto-resistive effect elements in which the first and second magneto-resistive effect elements are arranged in proximity to each other on a substrate, and one surface of the substrate perpendicular to the surface formed with the first and second magneto-resistive effect elements constitutes a slider surface, thereby providing appropriate height of the magneto-resistive effect elements.

Magnetic head and method of manufacturing the same

A thin-film includes an inductive element and a first and second magneto-resistive effect elements in which the first and second magneto-resistive effect elements are arranged in proximity to each other on a substrate, and one surface of the substrate perpendicular to the surface formed with the first and second magneto-resistive effect elements constitutes a slider surface, thereby providing appropriate hight of the magneto-resistive effect elements.

Magnetic head with electro-lapping guide

An L-shaped slide plate mounted with a workpiece holding device on a slide guide is firmly attached to an angle adjustment mechanism, and a reciprocating motion drive unit mounted with the angle adjustment mechanism on a slider table is firmly attached to a bridge so that an angle between a surface of a workpiece to be lapped and a surface of a lapping plate is kept substantially constant, and also the bridge is disposed so as to stride the lapping plate. Thereby, in a state of row bar in which a plurality of magnetic head sliders run in a line, an air bearing surface of magnetic head can be lapped with high accuracy with an element recession being decreased and an occurrence of a scratch being restrained.

Method of manufacturing magnetic head

A method of measuring variation in dimensions and alignment error of thin film magnetic heads formed on a raw bar cut-off from a substrate is provided. Such method comprises illuminating a MR element and a resistance detector element which is formed for monitoring a lapping process, both of which are formed on the raw bar, with illuminating light whose wavelength is 300 nm or less; forming an image by imaging light reflected from the elements; and converting the image to an image signal through photoelectric conversion so as to detect variation in dimensions of the MR element and the resistance detector element formed on the raw bar, and alignment error between the MR element and the resistance detector element with a high degree of accuracy.

Method for measuring dimensions and alignment of thin film magnetic head and apparatus therefor

A magnetic head is formed of materials having different hardnesses. The head includes a base coat formed on a substrate having a high hardness, for example alumina titanium carbide, upon which a base coat, for example alumina, is formed. The base coat typically had a thickness in the range of 0.05 to 0.5 &mgr;m. This structure provides an improved flying height for heads manufactured using a lapping process.

Thin film magnetic head with base coat and small pole-tip recess

By grinding the grinding surface of a diamond grinding tool which is formed in a predetermined shape by securing diamond abrasive grains by bond circularly or flat with high accuracy by the processing type truing method, uniformly dressing the above bond surface so as to project diamond abrasive grains, lapping the tips of the diamond abrasive grains projected from the above bond by the lapping type truing method so as to make the cutting edge height constant, the run,out of the grinding surface can be controlled to the order of submicrons and the cutting edges which are tips of the diamond abrasive grains can be aligned precisely.

Method and apparatus for truing and trued grinding tool

Dispersant for aqueous slurry of carbonaceous solid and aqueous

This invention relate to a structure for supporting a power lead connected to a superconductive field coil and refrigerant supply and discharge pipes in the hollow shaft of the superconductive rotor. A plurality of spacers for holding the power lead and the refrigerant supply and discharge pipes are fitted in a supporting sleeve, and fixed from the outer peripheral side of the supporting sleeve, the supporting sleeve itself being fixed in the cavity of the hollow shaft. Since the fixing work can be made from the outer peripheral side by means of the structure stated above, it is possible to fix the leads and pipes to the inside of the shaft easily and rigidly, and to avoid the generation of vibration so as to prevent serious damage to the stability of the superconductive state of the rotor.

Superconductive rotor

Growing community of inventors

Yokohama, Japan

Toshio Tamura