Abstract: A magnetic disk apparatus includes magnetic disks stacked on a rotating shaft, arms supporting magnetic heads, a rotary actuator for moving the arms, and a housing forming at least a part of an arcuate-shaped shroud which substantially surrounds a portion of side surfaces of the magnetic disks so as to define a gap between the shroud and the portion of the side surfaces of the magnetic disks. The arcuate-shaped shroud has portions delimiting an open space adjacent to another portion of the side surfaces of the magnetic disks which is located on a downstream side of the arms relative to an air flow which moves on surfaces of the magnetic disks. A bypass channel provides air flow to the disks in a region of the open space at a reduced pressure on the downstream side of the arms with respect to pressure at an upstream side of the arms.

Abstract: In a magnetic recording apparatus including a support arm movable with respect to a magnetic recording disk, a first actuator for moving the support arm with respect to the magnetic recording disk, a pair of support members at least one of which holds a magnetic head thereon and each of which is connected to the first actuator through the support arm to be driven by the first actuator through the support arm, and a pair of second actuators for moving respectively the support members with respect to the support arm so that the support members are respectively moved with respect to the magnetic recording disk by the first actuator and the second actuators, the second actuators move simultaneously the support members respectively with respect to the support arm in respective directions opposite to each other.

Abstract: A magnetic-disc apparatus for recording or reproducing information in which a slider loading a magnetic-head is supported on a magnetic disc. A supporting mechanism for supporting the slider on the magnetic-disc includes a first supporting member mounting the slider and a second supporting member connected with the first supporting member. The first supporting member includes a mounting portion for mounting the slider, at least one flexible finger portion provided at opposite sides of the mounting portion and a connecting portion connected to the second supporting member. The second supporting member including at a tip portion, a constricted portion extended to an end direction having a narrow width than that between inner side edges of the two flexible finger portions and a projecting portion projecting from the constricted portion to the direction of width. The projecting portion is overlapped with the flexible finger portion in the outward direction of surface.

Abstract: A magnetic head supporting apparatus having a magnetic head for reading and writing information on a magnetic disc, a slider for mounting the magnetic head, and a suspension for supporting the slider. An IC chip for controlling a signal of the magnetic head is mounted on a heat insulating substrate which substantially prevents conduction of heat therethough, and the heat insulating substrate is mounted to the suspension.

Abstract: To restrain temperature rise by controlling heat radiation from an IC. More specifically, an area of junctioning pads which are in contact with an IC is enlarged to substantially overlap the whole or at least half or more of the area of the IC. Further, the IC is covered with an overcoat which protrudes to other parts of a head supporting mechanism.

Abstract: A magnetic disk apparatus of the present invention is equipped with a microactuator for micro motion using piezoelectric elements in addition to a coarse adjustment actuator such as a voice coil motor or the like, eliminates parts that slide between the microactuator and surrounding members, and alleviates stress on the piezoelectric elements even if an impact is given to the magnetic disk apparatus. Thus, a first actuator fixing portion on a carriage side and a second actuator fixing portion on a magnetic head side of a microactuator mounting portion are coupled with a plurality of flexible coupling portions and coupling portions are placed outside the microactuator in substantially symmetric with respect to a centerline in a longitudinal direction of a suspension.

Abstract: A magnetic disk apparatus arranged in a housing having a plurality of magnetic disks stacked on a rotating shaft, arms supporting thereon magnetic heads and adapted to be inserted between said magnetic disks, a rotary actuator for moving the arms, a housing forming at least a part of an arcuate-shaped shroud which substantially surrounds a portion of side surfaces of the magnetic disks so as to permit movement of the arms and which is concentric with the magnetic disks so as to define a gap between the shroud and the portion of the side surfaces of said magnetic disks. The gap defined between the outer peripheral end surfaces of the magnetic disks and the shroud is in a range of 0.1 mm to 0.6 mm.

Abstract: A magnetic head slider includes a magnetic head for recording/reproducing information from/into a magnetic disk and a slider on which the magnetic head is mounted. The slider has a first surface provided at an air-inflow side and a second surface provided at an air-outflow side. Projections are provided at the air-inflow side with respect to the first surface on a surface while faces the magnetic disk upon read/write operation of the magnetic head slider.

Abstract: In the magnetic disk unit comprising suspensions in each of which an IC is mounted on a load beam, a magnetic head displacement caused by the warp of the load beam occurring due to heat generated from the IC is compensated, whereby the shortening of an access speed and high reliability of reading/writing are realized. The thermal displacement of the magnetic head is compensated by operating micro actuators on the load beam in accordance with the temperature rise of the IC which is measured by a temperature sensor. Namely, by driving the micro actuators so that the magnetic head may move in a direction reverse to the direction of the magnetic head movement caused by the thermal displacement, the thermal displacement of the magnetic head is made to be substantially zero.

Abstract: If a large external impact is applied to a magnetic disc apparatus, a slider jumps from a disc surface and rotates. When the slider jumps and rotates, its edges re-contact the disc surface to damage this surface. To reduce the rotation angle of the slider to control its position if an impact is effected, the present invention provides a roof on a load arm to reduce the contact angle at which the slider contacts the disc surface in order to relax the impact upon a contact.

Abstract: A magnetic head supporting apparatus having a magnetic head for reading and writing information on a magnetic disc, a slider for mounting said magnetic head, and a suspension for supporting the slider. An IC chip for controlling a signal of the magnetic head is mounted on a heat insulating substrate, and the heat insulating substrate is mounted to the suspension.

Abstract: A magnetic disk apparatus of the present invention comprises a head slider with a magnetic head mounted thereon, a disk on which information is recorded/regenerated by the magnetic head, a spindle motor, integrally structured with the disk, for rotating the disk, a suspension for elastically supporting the magnetic head slider, a carriage arm for supporting the suspension and positioning the magnetic head, and a base plate for attaching the spindle motor and the carriage arm. An out-of-plane primary natural frequency of a base plate part to which the spindle is to be attached is set to be substantially the same as that of a base plate part to which the carriage arm is to be attached. An out-of-plane primary natural frequency of the carriage arm is detached from that of the base plate part to which the carriage arm is to be attached to such an extent that no resonance occurs.

Abstract: A magnetic-disc apparatus for recording or reproducing information in which a slider loading a magnetic-head is supported on a magnetic disc. A supporting mechanism for supporting the slider on the magnetic-disc includes a first supporting member mounting the slider and a second supporting member connected with the first supporting member. The first supporting member includes a mounting portion for mounting the slider, at least one flexible finger portion provided at opposite sides of the mounting portion and a connecting portion connected to the second supporting member. The second supporting member including at a tip portion, a constricted portion extended to an end direction having a narrow width than that between inner side edges of the two flexible finger portions and a projecting portion projecting from the constricted portion to the direction of width. The projecting portion is overlapped with the flexible finger portion in the outward direction of surface.

Abstract: A magnetic head supporting apparatus includes a magnetic head for reading and writing information on a magnetic disc, a slider having the magnetic head, and a suspension for supporting the slider. An IC chip for controlling a signal of the magnetic head is mounted on a first surface of a heat insulating substrate, and a second surface of the heat insulating substrate opposite to the first surface thereof is mounted to the suspension.

Abstract: An object of the present invention is to prevent a spacing between a magnetic head and a writing medium at low temperature from increasing to cause a writing/reading error, and to prevent the magnetic head element protruded by a temperature increase from colliding with small protrusions on a magnetic disk surface, and to prevent damage on the element, and to prevent the occurrence of thermal asperity. In order to attain the object, a magnetic head slider is provided, which includes a magnetic head element supported on a rotating magnetic disk via a gap to write or read information on the magnetic disk, and a heat source for heating the magnetic head element. A magnetic disk device is further provided, which includes a magnetic head slider.

Abstract: A magnetic head slider includes a magnetic head for recording/reproducing information from/into a magnetic disk and a slider on which the magnetic head is mounted. The slider has a first surface provided at an air-inflow side and a second surface provided at an air-outflow side. Projections are provided at the air-inflow side with respect to the first surface on a surface while faces the magnetic disk upon read/write operation of the magnetic head slider.

Abstract: A magnetic disk apparatus arranged in a housing having a plurality of magnetic disks stacked on a rotating shaft, arms supporting thereon magnetic heads and adapted to be inserted between said magnetic disks, a rotary actuator for moving the arms, a housing forming at least a part of an arcuate-shaped shroud which substantially surrounds a portion of side surfaces of the magnetic disks so as to permit movement of the arms and which is concentric with the magnetic disks so as to define a gap between the shroud and the portion of the side surfaces of said magnetic disks. The gap defined between the outer peripheral end surfaces of the magnetic disks and the shroud is in a range of 0.1 mm to 0.6 mm.

Abstract: A magnetic head support mechanism comprises: a magnetic head for writing and reading data relative to a magnetic disk; a slider having a flying surface for flying over a surface of the magnetic disk, the slider having the magnetic head mounted thereon; a mounting portion on which the slider is mounted; a transverse frame connected to one end of the mounting portion; two flexible finger portions which extend respectively from opposite ends of the transverse frame, and are disposed respectively on opposite sides of the mounting portion; a beam portion connected at one end thereof to ends of the flexible finger portions; a spring portion connected at one end thereof to the other end of the beam portion; an arm mounting portion connected to the other end of the spring portion; and a slider posture control mechanism connecting a reverse surface of the slider at an air inflow-side end thereof to the beam portion.

Abstract: A magnetic head slider having a magnetic head for reading/writing information from/into a magnetic disk and a slider on which the magnetic head is mounted. The slider has three surface portions with levels which are different from each other on a surface facing to the magnetic disk including a first surface portion forming a pad surface, a second surface portion having a level which is lower than a level of the first surface portion and a third surface portion having a level which is lower than that of the second surface portion. The second surface portion is provided at a side opposite to a side on which the magnetic head is mounted and the third surface portion is provided at the side on which the magnetic head is mounted. A projection is provided on the second surface portion.

Abstract: In the magnetic disk unit comprising suspensions in each of which an IC is mounted on a load beam, a magnetic head displacement caused by the warp of the load beam occurring due to heat generated from the IC is compensated, whereby the shortening of an access speed and high reliability of reading/writing are realized. The thermal displacement of the magnetic head is compensated by operating micro actuators on the load beam in accordance with the temperature rise of the IC which is measured by a temperature sensor. Namely, by driving the micro actuators so that the magnetic head may move in a direction reverse to the direction of the magnetic head movement caused by the thermal displacement, the thermal displacement of the magnetic head is made to be substantially zero.