摘要:
A near field optical head which can project a near field light with high intensity and a method for manufacturing the same. The near field optical head (1000) comprises a slider (1001) supported by a suspension arm for exerting a load, receiving a floating force due to the relative motion with a recording medium, and forming a gap between the slider and the recording medium through the balance of the load and the floating force, a microstructure (1006) formed on the recording medium side of the slider (1001), a light propagating body (1803) arranged on the surface of the slider (1001) opposite to the recording medium side generally in parallel with the suspension arm, a mirror (1010) arranged generally above the microstructure (1006) in order to introduce the light from the light propagating body (1803) to the microstructure (1006), and a structure for shortening the optical path length between the output end of the light propagating body (1803) and the microstructure (1006).
摘要:
The present invention relates to a head supporting mechanism comprising a slider (50) on which a head (60) for recording and/or reproducing data on and from a recording medium is installed; a slider supporting member (32) for supporting the slider; a load beam (20) having a protrusion (28) placed on a free end thereof; and a flexure (30) with a flexure substrate (31) disposed at the load beam (20); wherein the flexure (30) is extending the flexure substrate (31) in the longitudinal direction and the slider supporting member (32) is supported by the free part (33f) of the extended end of the flexure (30); the load beam (20) supports the slider supporting member (32) by the protrusion (28) so as to pivot thereon around an axis of the protrusion (28) in the normal direction of the load beam to provide tracking compensation, a pair of displacement members (40a, 40b) is disposed on the flexure (30) between the flexure substrate (31) and the slider supporting member (32) side of a free end of the flexure extending from the flexure substrate, and the slider supporting member (32) comprises a main section (32a) and a slider-center-of-gravity holding section (32b) connected to the main section (32a) so as to allow the protrusion (28) on the load beam (20) to contact, whereby the slider-center-of-gravity holding section (32b) having a stepped structure (32b).
摘要:
A frictional connection device, wherein objects (1, 2) to be connected are pressed against each other and moved relatively each other so as to rub metal connection parts (3, 4) thereof against each other, whereby a frictional connection operation can be or stopped temporarily during the operation when the metal connection parts (3, 4) are frictionally connected to each other.
摘要:
A suspension assembly aiming at preventing the damage to a disc surface due to a load beam in a disc unit. In a head assembly having a thin plate type load beam, one end of which is connected to an actuator arm and the other end of which supports a head, a smooth surface projecting toward a disc surface is formed on a disc-side surface of a flexure. The projection is formed on the portion of the load beam which is slightly offset from a hinged portion toward the head. When an impact is imparted to the disc unit, a bend occurs around the hinged portion of the load beam. During this deformation of the load beam, the projection having a smooth surface is brought into contact with the disc so as to prevent the disc surface from being hurt.
摘要:
A method and apparatus are provided for implementing in situ low flyheight warning in a direct access storage device (DASD). For each head in the DASD, a readback amplitude ratio is identified from two different disk radii. The initial ratio value is stored for each head in the DASD. During operation of the DASD, readback amplitude is monitored and an operating readback amplitude ratio is identified from two different disk radii. A change between the initial ratio value and the operating readback ratio is calculated and compared with a threshold value to identify a low-flying slider. A warning is generated responsive to the change value being greater than the threshold value.
摘要:
To control load/unload operation of a slider with magnetic head mounted thereon, by which the speed can always be controlled stably while avoiding the slowdown or temporary stop of an actuator (607) during load/unload operation, a magnetic disk drive (601) is configured using magnetic disk media (602) with the servo information written therein beforehand up to the track located at a position corresponding to the landing zone (304) for the load operation of the magnetic head (slider) (606). The speed of the magnetic head (slider) (606) withdrawn to the ramp (608) is controlled at the unload operation. In the stage of initialization for controlling the speed of the load/unload operation, various parameters are recorded and updated to apply a voltage to power amplifier for compensating for the external forces caused by the friction mainly exerted between ramp (608) and slider support members, with reference to the take-off track or the landing track specified in the landing zone.
摘要:
A disc medium substrate which is made of resin and used for a disc, for instance a magnetic disc, on/from which information is recorded/reproduced with a floating head. Protrusions higher than 50 nm are not formed on the surface of the substrate which is scanned by the floating head. The substrate is so molded that the number of particles in the molding material whose particle diameters are larger than 5 mu m is not more than 10000/g. The molding can be injection molding. Thermoplastic norvolnene system resin can be employed as the molding material. Projections and recesses corresponding to recording tracks may be provided on the substrate.
摘要:
To control load/unload operation of a slider with magnetic head mounted thereon, by which the speed can always be controlled stably while avoiding the slowdown or temporary stop of an actuator (607) during load/unload operation, a magnetic disk drive (601) is configured using magnetic disk media (602) with the servo information written therein beforehand up to the track located at a position corresponding to the landing zone (304) for the load operation of the magnetic head (slider) (606). The speed of the magnetic head (slider) (606) withdrawn to the ramp (608) is controlled at the unload operation. In the stage of initialization for controlling the speed of the load/unload operation, various parameters are recorded and updated to apply a voltage to power amplifier for compensating for the external forces caused by the friction mainly exerted between ramp (608) and slider support members, with reference to the take-off track or the landing track specified in the landing zone.