Sony Corporation

Kazushige Kawazoe

Osamu Morita

Michio Yotsuya

Hironobu Ohuchi

Kenjiro Watanabe

Toru Takeda

Nobuhiro Hayashi

Takehisa Ishida

Takayasu Muto

Takamichi Yamakoshi

Satoru Seko

Hideaki Ishioka

Kazuyuki Yamamoto

Kanzo Okada

A recording and/or reproducing device having a magnetic head unit includes a slider having a magnetic head element fitted to the front end thereof, a head support arm carrying the slider fitted to the front end thereof and urged toward a disk and a ramp member for guiding the slider fitted to the head support arm from a stand-by position to a recording/reproducing position for recording information signals on or reproducing information signals from the disk and is adapted to record information signals on or reproduce information signals from the rotating disk. The ramp member pushes up the head support arm in a twisted state, so as to make the end of the slider located upstream relative to the other end in the sense of rotation of the disk to face upward relative to the disk when the slider is driven to move between the stand-by position and the recording/reproducing position.

Recording and/or reproducing device with head suspension arm elevated in a twisted state

A disk drive using a disk including a substrate made from a high polymer material is capable of reducing a spacing between a head slider and the disk to a value comparable to a spacing between the head slider and a disk having a glass substrate. A head slider of a disk drive, which is flied against the disk formed with a high polymer substrate, is specified such that a width W is in a range of 1.5 mm or less, and a length L is in a range of 1.8 mm or less, preferably, in a range of 1.25 mm or less. With this configuration, it is possible to realize a stable low flight height without the contact of the head slider with a disk and hence to realize high density recording, even if the disk is formed with a high polymer substrate in which a radius of curvature in the radial direction is about 10 m and a radius of curvature in the circumferential direction is about 20 m. Further, a head is fixed at a central portion of at least one of a pair of rails symmetrical in the width direction of the head slider. With this configuration, it is possible to reduce a variation in flight height of the head and hence to improve the quality of recording/reproducing signals.

Disk drive

Described herein is a hard disk drive HDD which adopts a CSS type floating or levitation head device. A condensation sensor is provided on the inner surface of a housing or chassis. Since the capacity of the chassis is large and moisture adsorbed by the chassis due to dew condensation or the like is hard to dry, the condensation or the like produced on the inner surface side of the chassis can be detected accurately by placing the condensation sensor on the inner surface of the chassis. The condensation sensor may be attached to an arm or suspension constituting an actuator, a head slider, a flexible printed board, or a portion or the like formed of the same material as that for a magnetic disc. When the condensation or the like is detected by the condensation sensor, the magnetic disc is allowed to stand by in a state of remaining stopped rotating until it is not detected. Thus, damage to the magnetic disc and breakage of the head slider or the like due to their sticking can be previously prevented from occurring. Owing to the above construction, high humidity or condensation can be effectively detected and damage to a recording medium and breakage of the head slider or the like can be prevented satisfactorily.

Recording medium driving device with condensation sensor

Recording medium driving device

A magnetic disk drive device that includes a disk-shaped medium with a magnetic film formed on a surface for recording or reproducing information, and a magnetic head for recording on and reproducing information from the disk-shaped medium. The disk-shaped medium has a data recording region and a control signal recording region. The data recording region is impressed to have convex recording regions for recording data and concave guard bands for separating adjacent recording regions. The control signal recording region has impressed concavities and convexities representing tracking marks (for effecting tracking control of the magnetic head), track number indicating marks and track numbers (for identifying the tracks), and clock marks dividing one circumference into equal intervals along a path of angular movement of the magnetic head. The disk-shaped medium has reduced track pitch and increased recording capacity because the concave guard bands can be very narrow without inducing crosstalk, and the tracking marks, track number indicating marks, and clock marks are impressed as concavities and convexities along the path of angular movement of the magnetic head.

Magnetic disk device and method of manufacturing same

A magnetic head device in which a terminal of a thin-film lead wire formed on a gimbal and a terminal of a magnetic head device of a magnetic head loaded on a slider mounted on the gimbal may be connected to each other easily and reliably. That is, the slider carrying the magnetic head is mounted on the gimbal carrying a patterned thin-film lead wire, and the terminal of the thin-film lead wire is connected to the terminal of the magnetic head device. The portion of the gimbal formed with the terminal of the thin-film lead wire is bent and the terminal of the thin-film lead wire formed on the bent gimbal portion is contacted with the terminal of the recording head for establishing electrical connection between the terminal of the thin-film lead wire and the terminal of the magnetic head.

Magnetic head device having bent terminal lead wires for establishing an

Floating type head slider, floating type head device, and disc drive

Magnetic disk device and method of manufacturing same having convex

In a magnetic head assembly in which a slider mounted with a magnetic head is fitted to a gimbal portion where lead wires are provided, the thickness of a gimbal portion where terminals of the lead wires are formed is formed thinner than another gimbal portion, and the terminals of the lead wires formed on this thin gimbal portion la are transformed so as to come into contact with terminals of the magnetic head. It is thus possible to connect terminals of thin film lead wires formed on a gimbal to terminals of a magnetic head mounted on a slider easily and surely.

Magnetic head assembly

A magnetic disk recording and/or reproducing method is utilized with a magnetic disk on which pre-formatting signals such as a servo signal for head positioning and an address signal are previously formed by uneven surfaces. The method employs a slider with a magnetic head mounted there. The mass (m) of slider, including the mass of the head, satisfies the following equalities;

Floating head magnetic disk recording and/or reproducing apparatus

The present invention is directed to a hard disc drive, in which a floating amount of a floating slider above a discrete type recording medium can be suppressed from being fluctuated to thereby stabilize a reproduced output voltage. The ratio between a maximum wavelength (L.sub.max) of an information pattern (2) of a discrete type recording medium (1) and the length L.sub.SL of a floating slider (3) in the running direction relative to the recording medium (1) is selected so as to satisfy L.sub.SL /L.sub.max &gt;1.

Hard disc drive

A flying head slider of a hard disk driver is moved by an actuator between a loading and an unloading position, a motor for rotating a disk is driven at nominal velocity when data is recorded on the disk by a magnetic head supported by the flying head slider and the motor is driven at a velocity faster than the nominal velocity when the flying head slider is moved from the loading position to the unloading position or from the unloading position to the loading position.

Growing community of inventors

Kanagawa, Japan

Kazushige Kawazoe