Alps Electric Co., Ltd.

Tdk Corporation

Alps Electronics Co., Ltd.

Akihiro Sato

Mitsuru Watanabe

Yuki Ono

Yukihiro Gorai

Hidezi Satoh

Hiroyuki Kobayashi

Keitaro Kikuchi

Kyoichi Kawase

Kazuhiko Matsui

Masanobu Sato

Kazuhiro Okamoto

A magnetic disk device includes a magnetic head assembly, which includes magnetic heads, support plates, and a flexible wiring substrate that are integrally formed. The magnetic heads include heating elements for making head element parts protrude toward magnetic disks by thermal expansion, the support plate supports the magnetic head, the flexible wiring substrate is provided along the support plate and electrically connects the magnetic heads to a circuit system, and the magnetic head assembly and the magnetic disks are assembled in a case. The magnetic disk device includes a sensor and a floating distance control circuit. The sensor detects at least one of atmospheric pressure, temperature, and humidity in the case. The floating distance control circuit increases or decreases current supplied to the heating element on the basis of the output of the sensor and controls the floating distance of the magnetic head so that the floating distance is constant. While being received in a package made of high temperature co-fired ceramic, the sensor is mounted on a circuit mounting surface of the flexible wiring substrate in the case.

Magnetic disk device including a sensor in a case

A thin film magnetic head includes a slider that floats from a surface of a recording medium by an airflow generated on the surface of the recording medium to be rotated, and a thin film magnetic head element structure that is formed on an air discharging end face of the slider. A thermal plastic deformation portion is provided in the vicinity of the air discharging end face on a back surface of a recording medium facing surface of a slider so that a part of the thin film magnetic head element structure is further spaced from the surface of the recording medium than the recording medium facing surface of the slider.

Thin film magnetic head having a thermal plastic deformation portion and manufacturing the same

A magnetic head device includes a slider including a thin-film element for writing and/or reading and a support for supporting the slider, the slider being bonded to a joint surface of the support at least partially with a conductive resin. A method for making the magnetic head device includes the steps of (a) applying the conductive resin at least onto a portion of an insulating layer formed on the joint surface of the support, (b) bonding the slider to the joint surface of the support with the conductive resin, and (c) causing dielectric breakdown in the insulating layer lying under the conductive resin before step (b) at the latest.

Magnetic head device and method for making the same

A magnetic head includes core blocks having a medium sliding surface formed on one surface of the core blocks, the medium sliding surface having a slender convex curved shape formed along a sliding direction of a recording medium from the upstream side of the sliding direction to the downstream side, and the medium sliding surface having a magnetic gap formed thereon, wherein the medium sliding surface is shaped along a longitudinal direction thereof like a circular arc with a radius of curvature R while being shaped along a width direction like a circular arc with a radius of curvature r, which is smaller than the radius of curvature R, so that the radius of curvature r is continuously reduced with closer distance to the downstream end of the recording medium sliding direction from a vicinity of the magnetic gap, so that by employing the above magnetic head, a long life magnetic head with small damage due to foreign material adhesion as well as small abrasion can be provided.

Magnetic head with medium sliding surface having varied curvature and recording/reproducing apparatus

Growing community of inventors

Niigata-ken, Japan

Akihiro Sato