Hitachi, Ltd.

Hitachi Global Storage Technologies Japan, Ltd.

Sunao Yonekawa

Yutaka Ito

Yasuhiro Yoshimura

Yoshishige Endo

Hiromitsu Tokisue

Yukiko Ikeda

Nobuyuki Ishii

Osamu Narisawa

Youichi Inoue

Yasuyuki Horiguchi

Hiroshi Yuyama

Hideaki Tanaka

Hiroshi Fukui

Mikio Tokuyama

Hidekazu Kohira

Masayuki Kurita

Toshiya Shiramatsu

Shigeru Tadokoro

Tadayuki Iwakura

Yoji Maruyama

Koji Miyake

Shigekazu Ohtomo

Yukihiro Isono

Tetsuya Matsusaki

Eiji Nakanishi

Masao Matsushita

In a slider using thermal expansion type, being adjustable on a flying height thereof, having problems to be solved, i.e., to reduce the electric power consumption, and to lesson the heat load upon a reproducing element thereof, wherein a heating deviceis located separating from tip portions of the recording and reproducing elementsand. Also, for deforming only the vicinity of the heating deviceand the recording and reproducing elementsand, so as to protrude from, the heating deviceand the recording and reproducing elementsandare surrounded by a resin filmof small rigidity, thereby increasing an amount of protrusion of the recording and reproducing elementsandper a unit of electric power, but without increasing temperature of the reproducing element, with an aim of the structure of cutting off the force from materials of circumferences against the deformation.

Magnetic head slider and magnet disk apparatus

A magnetic material having a low coefficient of thermal expansion of 11.5&#xd7;10/K or less is used for forming at least one of a lower shield or an upper shield. A laminated film comprising a layer of the magnetic material having a low coefficient of thermal expansion of 11.5&#xd7;10/K or less, and an 80 wt % NiFe alloy layer, is used for forming at least one of the lower shield and the upper shield. Thus, the thin film magnetic head having reduced after-record noise and reduced thermal protrusion can be obtained.

Thin film magnetic head

Protrusion of head elements to an air bearing surface is effectively reduced and their contact with a recording medium is thereby prevented by forming a level gap (concave) of about 3 nm in a multilayered protective film on the air bearing surface in a part matching an inductive write thin film head in a recording/reproducing separated type magnetic head and thereby offsetting protrusion of the head elements to the air bearing surface due to thermal deformation of the heads.

Recording/reproducing separated magnetic head with concave portion formed in air bearing protective film

A magnetic hard disk drive comprising a magnetic disk and a magnetic head slider, characterized in that said magnetic head slider is coated with a layer having a contact angle of 50&deg; or more when measured by using a lubricant coated on the magnetic disk, is free from start failure due to stiction caused by adhesion of the lubricant to the slider surface.

Process for producing a magnetic head slider

Magnetic hard disk drive and process for producing the same

Growing community of inventors

Odawara, Japan

Sunao Yonekawa