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公开(公告)号：JP2004213837A
公开(公告)日：2004-07-29
申请号：JP2003002658
申请日：2003-01-08
Inventor： FUNATO KOJI , MAKINO MASAHIRO , TANAKA SATOSHI , MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To handle a high-capacity HDD as a portable recording medium. SOLUTION: A PHD unit 1 writes/reads data with a host device 4 in a state where an adapter 2 is loaded. The PHD unit 1 writes/reads data with a host device 6 in the state of being mounted on a cradle 3. The PHD unit 1 is easily replaced for the adapter 2 and the cradle 3, and freely carried. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract translation: 要解决的问题：处理作为便携式记录介质的高容量HDD。 解决方案：PHD单元1在加载适配器2的状态下用主机设备4写入/读取数据。 PHD单元1在被安装在支架3上的状态下用主机装置6写入/读取数据。适配器2和支架3容易地更换PHD单元1，并且可以自由地携带。 版权所有（C）2004，JPO＆NCIPI
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公开(公告)号：JPH11339414A
公开(公告)日：1999-12-10
申请号：JP14340998
申请日：1998-05-25
Applicant: SONY CORP
Inventor： MORITA OSAMI
IPC: G11B21/21
Abstract: PROBLEM TO BE SOLVED: To attain a good and high quality projection detecting signal for detection of projection existing on the surface of a disk type recording medium by a thermal resistance method. SOLUTION: An almost rectangular shape resistor 3 is mounted on a floating slider 2 and a first conductor 4 is connected to one end of long axis direction of a resistor 3, while a second conductor 5 is also connected to the other end thereof. Under the condition that the floating slider 2 is floated on a disk type recording medium 1, a sense current I is supplied to the resistor 3 via the first and second conductors 4, 5. Resistance change of the resistor 3 which is generated when the resistor 3 collides with a projection existing on the surface of the disk type recording medium 1 is detected by detecting a voltage change of the sense current I, thereby detects projection existing on the surface of disk type recording medium 1.
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公开(公告)号：JPH11161944A
公开(公告)日：1999-06-18
申请号：JP32663997
申请日：1997-11-27
Applicant: SONY CORP
Inventor： MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic disk and a magnetic disk device effectively suppressing a floating fluctuation amount of a head slider as much as possible at a servo zone passing time, stably recording and/or reproducing and suitable to mass production. SOLUTION: In the magnetic disk, information is recorded/reproduced by a magnetic head loaded on the head slider whose part at least is floated at a recording/reproducing time. This magnetic disk is provided with a data zone 3a formed with a groovy recessed part 3a2 along a recording track and recorded with an information signal on a projection part 3a1 between the relevant recessed parts and the servo zone 35 formed with ruggedness answering to a control signal containing a servo signal, etc., magnetizing the recessed part 3b, and the projection part 3b1 to polarities opposite to each other and recorded with the control signal. Particularly, the area of the projection part 3b1 in the servo zone 3b is larger than the area of the recessed part 3b2 in the servo zone 3b.
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公开(公告)号：JPH10283632A
公开(公告)日：1998-10-23
申请号：JP8808197
申请日：1997-04-07
Applicant: SONY CORP
Inventor： OYANAGI HIDEKI , MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To maintain a stable floating attitude during the movement of a head slider by forming a projecting and recessed section on the surface of a medium to record information, forming projecting pit columns at the inner or the outer peripheral sections of the projecting and recessed section and making the heights of the section above and the pit columns to be different. SOLUTION: In a CSS zone 3d, rectangular shaped pit columns 3p are formed in a concentric circular ring shape. In a data zone 3b, a projecting and recessed section, i.e., projecting shaped data tracks 3t and recessing shaped guard bands 3g are formed in a concentric circular ring shape. In order to make the floating height of the head slider to be 50 nm, the ratio of the area of the projecting section formed in the zone 3b of a magnetic disk and the area of the recessed sections to be 2:1. In order to eliminate the change in the attitude of the head slider while it is moving from the zone 3a to the zone 3b, the heights of the pits 3p are made higher than the heights of the tracks 3t for the amount of 10 nm.
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公开(公告)号：JPH10177718A
公开(公告)日：1998-06-30
申请号：JP33592196
申请日：1996-12-16
Applicant: SONY CORP
Inventor： MORITA OSAMI , KAMOSHITA HIROKO
Abstract: PROBLEM TO BE SOLVED: To simplify manufacturing processes and to reduce the cost by forming an area to be in contact with a head slider into a pattern of projecting put arrays and also making a floating amt. reference plane of this contact area higher than that of an information area. SOLUTION: The substrate for the magnetic disk 3 can be produced by injection molding using a stamper applied to an optical disk, etc., and in the case of a flat type magnetic disk, a CSS zone 3a can be formed with the pit arrays at the same time that the shape of the substrate for the magnetic disk is formed. Then, in the case of a discrete type magnetic disk, a CSS zone 3a can be formed with the pit arrays at the same time that the shape of the substrate of the magnetic disk is formed, while projecting and recessed parts of a data zone 3b can also be formed. Consequently, the magnetic disk 3 having the CSS zone 3a can be produced in the same number of processes as a magnetic disk without a CSS zone 3a.
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Patent Agency Ranking
公开(公告)号：JPH09305966A
公开(公告)日：1997-11-28
申请号：JP15002396
申请日：1996-05-20
Applicant: SONY CORP
Inventor： OYANAGI HIDEKI , MORITA OSAMI
IPC: G11B5/82 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/127 , G11B5/48 , G11B5/55 , G11B5/60 , G11B5/65 , G11B5/73
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic disk device by which information is recorded and reproduced stably and which increases a recording density by a method wherein an information recording area on a magnetic disk on and from which the information is recorded and reproduced by using a magnetic head mounted on a head slider is formed of an uneven part. SOLUTION: An information recording region on a magnetic disk 3 on and from which information is recorded and reproduced by using a magnetic head 8 mounted on a head slider 6 is formed on an uneven part. Then, the disk 3 is set on a magnetization device so as to be rotated and run, and a magnetic film in a recess and that in a protruding part on the disk are magnetized in the vertical direction. When the levitation amount of the slider 6 is extremely small, an air film on the protruding part is very thin, and it loses the property of an air spring. On the other hand, an air film on the recess is still sufficiently thick, it holes the property of a hydrodynamic air spring, and the slider 6 can be levitated stably so as to be low. In addition, since a guard band is formed as a physical recess with reference to a data track, the blur of a signal is small in a recording operation and a reproducing operation, a cross talk is reduced, and a recording density is increased.
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公开(公告)号：JPH09305965A
公开(公告)日：1997-11-28
申请号：JP15002596
申请日：1996-05-20
Applicant: SONY CORP
Inventor： MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To run a magnetic head at a very small spacing from the surface of a disk by providing an information recording medium in which the undulation in the running direction of a head slider at least on one surface is adapted to a specific expression. SOLUTION: In an information recording medium on which information is recorded by a levitation type head slider 6, the undulation in the running direction of the head slider 6 at leas on one surface is adapted to an expression indicated by a number 1, where (a) represented the amplitude of the undulation in the running direction of the head slider, (h) represents the average levitation amount of the head slider, λ represents s the cycle of the undulation in the running direction of the head slider, and (l) represents the length of the head slider. When a current is supplied to a voice coil 5 from the outside, an arm 4 is turned around a vertical axis 4a due to a strength which is produced by the magnetic fields of magnets 7a, 7b and by the current flowing to the coil 5. As a result, the slider 6 is moved top the radial direction of a disk 3. Then, a magnetic head 8 is levitated and run at a very small spacing from the surface of the disk.
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公开(公告)号：JPH06301936A
公开(公告)日：1994-10-28
申请号：JP1870494
申请日：1994-02-15
Applicant: SONY CORP
Inventor： TERADA SHOJI , SENDA AKIKO , MORITA OSAMI
IPC: G11B5/39
Abstract: PURPOSE:To reduce a magnetic flux leaking to a pair of magnetic shields from the middle of a magnetic sensitive part and to achieve high reproduced outputs, by providing the pair of magnetic shields with groove parts larger than the gap length, and setting the width of each groove part in a predetermined range. CONSTITUTION:A pair of electrodes 32a, 32b for the supply of power are provided at both sides of a magnetic sensitive part 1a of an MR film 1. A sense current is fed approximately in the same direction as that of a signal magnetic field from a recording medium. The MR film 1 and the pair of electrodes 32a, 32b are disposed between a pair of upper and lower magnetic shields 2 and 3 confronting each other via insulating layers 13, 14. The magnetic bodies 2, 3 constitute a magnetic path at the reproducing time. Groove parts 2a, 3a are provided in the corresponding magnetic shields 2, 3. A step difference (h) of the groove part 2a, 3a where it confronts to the magnetic sensitive part 1a of the magnetic shield 2, 3 is set larger than a gap length g1, g2 between the MR film 1 and the magnetic shield 2, 3. A width L of each groove part 2a, 3a is set to satisfy 0
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公开(公告)号：JPH0581808A
公开(公告)日：1993-04-02
申请号：JP24209191
申请日：1991-09-20
Applicant: SONY CORP
Inventor： KAWAZOE KAZUSHIGE , MORITA OSAMI
Abstract: PURPOSE:To make the fluctuation in flying height of a flying slider constant and to improve reproduction characteristics by making the ratio of a longest wavelength of information pattern of a discrete recording medium and a length in the relative traveling direction of flying slider with the recording medium, to a specific value. CONSTITUTION:A data recording pattern 13 and a servo pattern 14 are formed on a disk substrate 11, after a magnetic layer coating, to constitute the discrete recording medium 1. The ratio of the sum of lengths Lmax in the relative traveling direction of each pattern 13, 14 with each slider 3 and the length Lsl in the relative traveling direction of slider 3 with the medium 1, is selected to be Lsl/Lmax>1. That is, in the case the quantity of sectors is assumed as 100 in this example, the wavelength Lmax is about 2.76mm and the Lsl is made to 4mm when the radius of the outermost circumference of the recording part of medium 1 is 44mm. The fluctuation DELTAh in flying hight is thereby kept almost constant, and the almost constant reproducing output voltage is obtained at any position on the medium 1.
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公开(公告)号：JPH0434717A
公开(公告)日：1992-02-05
申请号：JP14068890
申请日：1990-05-30
Applicant: SONY CORP
Inventor： MORITA OSAMI
Abstract: PURPOSE:To allow many valued recording and to improve magnetic recording density without lowering S/N by laminating >=2 layers of magnetic layers which vary respectively in coercive force Hc with a relation that the coercive force Hc increases successively from the side in opposite contact with or opposite to a magnetic head toward the side parting therefrom. CONSTITUTION:The magnetic layers 1 to 3 which vary respectively in the coer cive force Hc are laminated in n-layers of >=2 layers with the relation that the coercive force Hc increases successively from the side in opposite contact with or opposite to the magnetic head 6 toward the side parting therefrom. The magnetic recording medium laminated with n-pieces of the magnetic layers having the different coercive forces Hc and different residual magnetic flux densities Br can eventually adopt >=n+1 kinds of magnetization forms as a whole so that >=n+1 many valued recording is possible. The recording density is improved in this way without decreasing the track width and magnetic record ing wavelength. The magnetic recording and reproducing density is thus im proved without decreasing the signal quantity, i.e. without lowering the S/N.
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