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公开(公告)号：JPH10235655A
公开(公告)日：1998-09-08
申请号：JP4667397
申请日：1997-02-28
Applicant: SONY CORP
Inventor： MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To obtain good friction characteristics by applying physical etching to a part corresponding to a specified area and roughing when manufacturing a metal mold to be used for molding a substrate for a magnetic disc, with a specified area of which a magnetic head comes into contact during the time of non-rotating drive. SOLUTION: In an etching step, the surface of a substrate 5 is ion-etched for a metal mold for a resist 5 with a specified uneven pattern and also for a part not wrapped with the resist 6, using an ion beam 8 inside an ion etching device. In this case, the surface of the substrate 5 for the metal mold for the resist 6 with a specified pattern and the part not wrapped with the resist 6, is roughed. The surface of the substrate 5 for the metal mold not wrapped with the resist 6 is rough as the surface is directly subjected to a physical etching process. Thus it is possible to manufacturing the metal mold for molding the substrate with a specified uneven pattern made up of a recessed part and a projecting part, both having a surface roughed by the physical etching process.
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公开(公告)号：JPH1040540A
公开(公告)日：1998-02-13
申请号：JP20918096
申请日：1996-07-19
Applicant: SONY CORP
Inventor： MORITA OSAMI
IPC: G11B5/82
Abstract: PROBLEM TO BE SOLVED: To stabilize reproduction by controlling amount of floating of a head slider for the entire surface of a magnetic disc keeping constant a load capacity through constant ratio of the projected and recessed areas of the read only data zone and reprogrammable data zone in a magnetic disc. SOLUTION: The internal circumference side of a magnetic disc 3 is formed of a read only data track DTR composed of the concentric recessed and projected areas and a data track DTW of reprogrammable area formed of the projected area in the external circumference side and these have the guard bands GBR, GBW of the recessed area for the adjacent data track sections and the servo patterns SPR, SPW are also formed by the projected or recessed areas. A load capacity which is a parameter of the floating force of the head slider is determined by the ratio of the recessed areas. Therefore, in the recessed and projected areas of PTW, GBW and DTR, GBR, the track width of projected area/track pich-recessed track width is adjusted to adjust the ratio of the recessed area and projected area to 4.5 or less to keep constant the amount of floating of the head slider even in any areas.
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公开(公告)号：JPH09304010A
公开(公告)日：1997-11-28
申请号：JP14671096
申请日：1996-05-16
Applicant: SONY CORP
Inventor： MORITA OSAMI , ITAYA MASARU
Abstract: PROBLEM TO BE SOLVED: To enable highly accurate detection of a protrusion on a magnetic recording medium by providing a resistor with a sensor sensitivity exceeding a specified value as such for detecting changes in temperature when hitting the protrusion on the magnetic recording medium. SOLUTION: Generally, as the noise of a sensor is above about 50mV and the resolutions of a voltage comparator for judging a noise and a signal are about 10mV, a protrusion on a magnetic disc 6 can not be judged if an output voltage is below 6.0mV. So, a resistor 4 of a protrusion detecting sensor 1 is used with the sensitivity S of at least 1.15 e10 (%/J)or more and at least 2.0 e9 (%/J) or move when the sensor noise is zero as expressed by the formula S=&Egr;/(η.I.h.t.ν) (wherein S:sersor sensitivity and :temperature sensitivity of sensor and the η, I, h, t, ν represent specific heat, width, height, thickness and density). This enables sufficient detection of the protrusion of the magnetic disc 6.
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公开(公告)号：JPH09147429A
公开(公告)日：1997-06-06
申请号：JP30117595
申请日：1995-11-20
Applicant: SONY CORP
Inventor： KUROKAWA KOTARO , MORITA OSAMI , SENDA AKIKO
IPC: G11B7/26
Abstract: PROBLEM TO BE SOLVED: To lower a ratio occupied by a servo area and to increase a recording area for data by executing the development of a photosensitive resist film in such a manner that the developing speed in a thickness direction is higher than the developing speed in a surface direction. SOLUTION: If the developing speed in the thickness direction is higher than the developing speed in the surface direction, the development may be progressed down to the prescribed depth while a developed area does not spread on the upper side of the resist. Consequently, recessed parts are so formed as to substantially eliminate the difference in the sectional areas on the upper side and the lower side on a resist master disk, by which steep edges are formed. Then, the rugged shapes of steep edges are also formed on a stamper formed with rugged patterns as the inversion patterns. The developing speed in the thickness direction may be higher than the developing speed in the surface direction simply by previously treating the resist film before the exposure by an alkaline soln.
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公开(公告)号：JPH0944843A
公开(公告)日：1997-02-14
申请号：JP19074595
申请日：1995-07-26
Applicant: SONY CORP
Inventor： MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To obtain such a recording card at a low cost that the recorded information can not be easily erased or rewritten and that wear of the signal recording area is prevented. SOLUTION: Magnetic tapes 6 each having a magnetic layer 1b are deposited on a nonmagnetic card base body 1a to form a signal recording region 3. The signal recording region 3 consists of a recessed part 5 and a projecting part 4, while the magnetization direction in the recessed part 5 is opposite to the magnetization direction in the projecting part 4. Moreover, at least the recessed part is filled with a protective material 12.
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Patent Agency Ranking
公开(公告)号：JPH07147068A
公开(公告)日：1995-06-06
申请号：JP20767994
申请日：1994-08-31
Applicant: SONY CORP
Inventor： MORITA OSAMI , KUYAMA NAOKO , TAKINO HIROSHI , SANO TAKANOBU
Abstract: PURPOSE:To enable writing-in of a trucking signal high in position accuracy without increasing a production cost of a magnetic recording medium and to obtain a good float traveling property and durability when a medium is applied to CSS system. CONSTITUTION:In a hard disk, a servopit is formed in rugged shape on a rigid substrate 1 on which a magnetic film is foamed and numerous particulates 2 are stuck uniformly on the surface, and the magnetic film is magnetized so that a region coping with a recessing part of the magnetic film and the region coping with a projecting part may have an opposite magnetizing direction each other.
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公开(公告)号：JPH04149815A
公开(公告)日：1992-05-22
申请号：JP27244790
申请日：1990-10-12
Applicant: SONY CORP
Inventor： UCHIYAMA HIROSHI , HONDA NAOKI , MORITA OSAMI
Abstract: PURPOSE:To sufficiently deal with the short wavelength of a recording wavelength by supporting a magnetic head with a leaf spring attached approximately in parallel to a disk face. CONSTITUTION:On a supporting frame 6, slits 7, 8 in order to attach and fix the leaf springs 4, 5, in parallel to the disk face are provided, and a head part 2 is supported along a clearance groove 6a to move freely up and down. Consequently, the head part can follow up a hard disk 1 even if the disk has an uneven surface, and the state of good contact is always maintained. Also, the magnetic head 2 is supported by two leaf springs 4, 5 having an adequate elastic modulus, the force applied in the direction of the disk 1 shows a suitable value, and sliding durability of the disk 1 is also secured. In addition, a spacing loss is reduced, a high density by means of the short wavelength recording is attained, and the short wavelength is sufficiently dealt with.
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公开(公告)号：JPH03113712A
公开(公告)日：1991-05-15
申请号：JP24725589
申请日：1989-09-22
Applicant: SONY CORP
Inventor： KAWAZOE KAZUSHIGE , SAITO ICHIRO , MORITA OSAMI
Abstract: PURPOSE:To improve the high density recording on a discoid recording medium by detecting highly and precisely the position of a head by detecting directly and optically the recording track of the disk-shaped recording medium as the position detection information of the magnetic head. CONSTITUTION:The data surface 11 of the hard disk 3 is irradiated from the direction of an arrow mark (c) with light from a light emission element 31 which is transferred along an optical path constituted of a half-mirror 32, a polarizier 33 and a mirror 36, etc. The light reflected to the direction of the arrow mark (d) by the data surface 11 is transferred reversely to direction of the arrow along the optical, and is reflected to the direction of the arrow mark (d) by the half mirror 32, and is received 35. The irradiating light f1 to the data surface 11 from the direction of the arrow mark (c) is linearly polarized when it is transmitted through the polarizer 33, and its angle of polarization is made equal uniformly, and since its reflected lights f2, f3 are received after being transmitted through the polarizer 33, the light f3 to be received after reflected by a guard band 24 becomes bright, and the light f3 to be received after reflected by a recording track 23 becomes dark, and the light receiving element 35 can detects the band 24 and the track 23 according to the lightness or the darkness of the light due to the change of the angle of polarization.
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公开(公告)号：JP2000355390A
公开(公告)日：2000-12-26
申请号：JP16444199
申请日：1999-06-10
Applicant: SONY CORP
Inventor： ITAYA MASARU , SASA TAKESHI , MORITA OSAMI
Abstract: PROBLEM TO BE SOLVED: To hold a disk substrate correctly without deformation of the disk substrate by a method wherein a disk holding surface is provided at a disk holding member and a disk is held from the inside with a pressure applied to the interior of the disk by the disk holding surface. SOLUTION: For a disk holding member 1, a main surfasce thereof is formed in a rectangular block-like shape and a plurality of disk holding grooves 2 for engagement with an inner circumferential part of a center hole of a disk are formed at the disk holding surface. Then, two pieces of the disk holding members 1 are inserted into the center hole of the disk and respectively fitted to opposite inner circumferential edges of the center hole and pressed toward the outer circumferential direction of the disk, and thereby the disk is held from its inner circumferential side. Or, a disk holding member 5 may be formed in a sheet-like shape with a plurality of disk holding grooves provided, and after the sheet-like member is rolled up and inserted into a center hole of a disk 6, a pressure is applied from the inner circumferential side to the outer circumferential side with the rolled-up member unrolled, and the disk 6 is held therewith.
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公开(公告)号：JP2000149493A
公开(公告)日：2000-05-30
申请号：JP31106198
申请日：1998-10-30
Applicant: SONY CORP
Inventor： MORITA OSAMI , TAKINO HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a disk device on which information is stably recorded and/or reproduced from it even though a shock is applied to the device and no damage is produced on the signal recording surface of an information recording medium. SOLUTION: The device is used to record and/or reproduce information on a disk shaped information recording medium 5. A vibration preventing member 31 is provided to the device to prevent the vibration of the medium 5 caused by a shock by letting an outer peripheral section 5a of the medium 5 abut against the member 31. Thus, even though a shock is applied to the device and the medium 5 vibrates, no damage is induced on the medium.
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