Fujitsu Corporation

Yuji Sasaki

Mitsuaki Yoshida

Yoshinori Ogawa

Yukio Miyazaki

Kazunori Shikano

Masato Ishikawa

Yasutaka Matsui

Toshihiko Endo

Tomoyoshi Yamada

Hiroshi Takekawa

Toshiyuki Hachiya

Masaaki Niijima

Takuya Kobayashi

A disk drive including a disk rotatably mounted in a housing and having a plurality of tracks, a rotating mechanism for rotating the disk, a head slider having a transducer for reading/writing data on the disk, and an actuator for moving the head slider across the tracks. The actuator includes an actuator arm rotatably mounted in the housing, a suspension having a front end portion for supporting the head slider and a base end portion fixed to the actuator arm, and a pad mounted on a disk opposing surface of the actuator arm. The pad overlaps at least an outermost circumferential portion of the disk in a specific position of the actuator upon stoppage of driving of the disk drive.

Disk drive having external shock resistance

A magnetoresistive magnetic head comprises a first magnetic shielding layer formed on an underlying layer, a first nonmagnetic insulating layer formed on the first magnetic shielding layer, a magnetoresistive device formed on the first nonmagnetic insulating layer, first and second leads formed on the first nonmagnetic insulating layer to be connected to both sides of the magnetoresistive device respectively, a second nonmagnetic insulating layer formed to cover the first and second leads and the magnetoresistive device, a second magnetic shielding layer formed on the second nonmagnetic insulating layer to be positioned over the magnetoresistive device, and a resistor element buried in at least one of the first and second nonmagnetic insulating layers to electrically connect the first lead to either the first magnetic shielding layer or the second magnetic shielding layer.

Magnetic head and magnetic recording/reproducing apparatus

Disclosed is a magnetic disk apparatus constructed to reduce a track positional deviation of a magnetic head. This magnetic disk apparatus includes a rotary mechanism for rotating the magnetic disk and a rotary type actuator, provided with the magnetic head at its front end, which magnetic head has a write head and a read head, for moving the magnetic head in such a direction as to traverse tracks of the magnetic disk by making rotations about a rotary shaft. A distance A from the center of rotation of the rotary type actuator to the magnetic head is set equal to or larger than a distance B from the center of rotation of the rotary type actuator to the center of rotation of the magnetic disk. Even when separating a write element and a read element, the track positional deviation of the magnetic head can be reduced. This magnetic disk apparatus includes an enclosure accommodating both of a rotary mechanism and the rotary type actuator and having a base taking such a configuration that one side surface thereof is opened and a cover fitted in the base, wherein a side for separating the base and the cover is formed at a slant to a long side of the apparatus. This construction makes it possible to enhance a rigidity of the enclosure and reduce the track positional deviation of the magnetic head.

Magnetic disk apparatus

A rotary type actuator for a magnetic disk device includes a magnetic head that traverses tracks of the magnetic disk as the actuator rotates about a rotary shaft. The rotary type actuator has at least one arm for the magnetic head at its front end. A first flat cable has one end connected to the rotary type actuator, for making an electrical connection to the electronics in the disk device. A second flat cable is provided on the side surface of the arm, for electrically connecting the magnetic head to the first flat cable. The first flat cable includes a plurality of lands arranged along an extended direction of the arm. The second flat cable includes a first land group provided at one end of the second flat cable for electrically connecting to the magnetic head. The first land group has a plurality of lands arranged along an extended direction of the arm. A second land group is provided at the other end of the second flat cable for electrically connecting to the first flat cable. The second land group has a plurality of lands arranged along the extended direction of the arm, disposed in face-to-face relationship with the lands of the first flat cable, and a lead pattern is provided for electrically connecting the first land group and the second land group. In this manner, the second flat cable overlaps with the first flat cable at the other end.

Flat cable connecting system for rotary type actuators in magnetic disk

A head assembly having a head for recording and reproducing and a head-supporting part for supporting the head includes a signal-conducting pattern formed on the head-supporting part and connected to the head and a protection member formed at a portion of the head-supporting part so as to protect the signal-conducting pattern, the portion being attached to a head-carrying unit for carrying said head assembly.

Growing community of inventors

Kawasaki, Japan

Yuji Sasaki