Abstract: To provide a method for evaluating dynamic mechanical characteristics of a storage medium driving unit in the form of a finished product without taking it apart to pieces and without remodeling it, and to provide a system adapted to the method.

Abstract: A method comprising the steps of: measuring torque of a whole of a driving unit over a predetermined period; and determining mechanical driving characteristics of the driving unit from the time variation of the measured torque value. An apparatus adapted for the method, comprising: a torque sensor 12 removably mounted to a driving unit 10 having a disk rotating mechanism including a storage medium disk 1, and a storage information track tracking mechanism including a read head 2 provided for reading storage information from the storage medium disk 1; and an evaluation processing unit (ES) having a ROM for storing an operation program to process a torque detection signal, a RAM for temporarily storing data of the torque detection signal and processing signals, a processing portion, a display/recording unit, and a switching unit for sending a measurement start/stop instruction signal to an electronic control unit (DT) for supplying a driving current to a motor 6 of the disk rotating mechanism.

Abstract: A magnetic head slider assembly for a magnetic disk type recording/reproducing apparatus includes a slider body, a sliding pad provided on the slider body and projecting beyond a disk facing surface thereof, a thin film layer disposed at one end of the slider body, a magnetic head constituted by the thin film layer as an integral part thereof, and a core pad projection incorporating therein a core of the magnetic head and projecting beyond an adjacent disk facing surface of the slider body. The sliding pad is provided at a region of the slider body ahead of the core pad projection and prevents generation of a floating force by making use of a relative movement between the slider body and the magnetic disk.

Abstract: Three pads are disposed on the surface of a magnetic head facing to a storage medium and are brought into contact with the surface of the storage medium through a lubricant layer. The total of areas of the three pads is equal to or larger than 0.0001 mm.sup.2 and equal to or smaller than 0.02 mm.sup.2 and the height of the pads is equal to or higher than 5 .mu.m and equal to or lower than 100 .mu.m. Two pads of the three pads include tapers formed in the front thereof and are disposed in a forward position in a relative movement direction to the storage medium and one remaining pad is disposed in a backward position. The total of areas of the two pads in the forward position is set to be narrower than an area of the pad in the backward position. A writing and reading function unit is provided in the pad in the backward position.

Abstract: A magnetic head slider assembly for a magnetic disk type recording/reproducing apparatus includes a slider body, a sliding pad provided on the slider body and projecting beyond a disk facing surface thereof, a thin film layer disposed at one end of the slider body, a magnetic head constituted by the thin film layer as an integral part thereof, and a core pad projection incorporating therein a core of the magnetic head and projecting beyond an adjacent disk facing surface of the slider body. The sliding pad is provided at a region of the slider body ahead of the core pad projection and prevents generation of a floating force by making use of a relative movement between the slider body and the magnetic disk.

Abstract: A magnetic head slider assembly for a magnetic disk type recording/reproducing apparatus includes a slider body, a floating pad provided on the slider body and projecting beyond a disk facing surface thereof, a thin film layer disposed at one end of the slider body, a magnetic head constituted by the thin film layer as an integral part thereof, and a core pad projection incorporating therein a core of the magnetic head and projecting beyond an adjacent disk facing surface of the slider body. The core pad projection is not formed as a continuation of the slider body and is separated from the floating pad a predetermined distance longitudinally of the slider body by a recess interposed therebetween whereby the core pad projection is positioned closer to the magnetic disk than a back end of the floating pad whereby influence of a process offset between the slider body and the magnetic head during fabrication process can be eliminated.

Abstract: A magnetic disc apparatus includes a casing for defining a sealed space, a magnetic disc disposed within the space, a spindle to which the magnetic disc is fixed, a motor for rotating the spindle, a flying head slider for writing and/or reading information in and/or from the magnetic disc and a carriage for translating the flying head slider. The magnetic disc apparatus incorporates an organic chemical compound capable of suppressing siloxane from being chemically changed to silicon oxide. The organic chemical compound contains at least one of monoalkyl-substituted benzene, dialkyl-substituted benzene, trialkyl-substituted benzene, fatty acid, fatty ester, alkyl ester of aromatic acid, thiazoles and phenols.