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11. 发明专利

JPS62137715A MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPS62137715A
公开(公告)日：1987-06-20
申请号：JP27673785
申请日：1985-12-11
申请人： HITACHI LTD
发明人： KAZAMA TOSHINORI
IPC分类号： G11B23/00 , G11B5/41
摘要： PURPOSE:To remove the matters attached onto a slider surface by providing a contact start-stop zone which contains a filler of a large quantity or large grain sizes having different data zones and surface structures and the rough surface accuracy. CONSTITUTION:A coating material consisting of the magnetic powder, a binder, a solvent and a large quantity of filler (alumina abrasive grains) having large grain sizes is applied a spin coating machine only in a CSS zone 2 of a substrate 1. Then a coating material having the prescribed electrical characteristics is applied to the entire surface of the substrate 1 and then hardened by a heat treatment carried out at a high temperature. Here, a prescribed film thickness 6 is secured by means of a grinder. Thus a film containing a protruded filler with rough surface accuracy is formed at a CSS zone of a magnetic recording medium containing said filler of a large quantity or large grain sizes.

12. 发明专利

JPS5972680A Magnetic disc device 失效
标题翻译：磁碟设备
公开(公告)号：JPS5972680A
公开(公告)日：1984-04-24
申请号：JP18284182
申请日：1982-10-20
申请人： Hitachi Ltd
发明人： TAKAHASHI HATSUO , MIYAKE YOSHIHIKO , HONDA MASANOBU , IIDA MUNEO , KAZAMA TOSHINORI , MOCHIDA JIROU , TADA SEIJI , FUJII MASAYUKI , OKAMOTO NOBUYUKI
IPC分类号： G11B5/60 , G11B21/21 , G11B33/14
CPC分类号： G11B5/6005 , G11B33/14
摘要： PURPOSE:To float stably a magnetic head, by surrounding a magnetic disc in a dust-proof cover by a shroud to reduce the disturbance in the flow of circulating air via a filter. CONSTITUTION:The magnetic disc 1 enclosed with the dust-proof cover is surrounded by the shroud 13, and clean air is circulated without disturbance via inserting inlets 15a, 15b to which the filter 12, actuators 4a, 4b and respective access arms 2a, 2b are inserted. The magnetic head is floated stably without producing vibration by the air flow having no disturbance, allowing to record and reproduce data in excellent way.
摘要翻译：目的：通过用护罩围住防尘盖中的磁盘，以便通过过滤器减少循环空气流动的干扰，使磁头稳定地浮动。构成：由防尘罩包围的磁盘1被护罩13包围，通过插入入口15a，15b将清洁空气循环，通过插入口15a，15b，过滤器12，致动器4a，4b和相应的接近臂2a，2b 被插入。磁头稳定地浮动，不会产生没有干扰的气流的振动，从而以极好的方式记录和再现数据。

13. 发明专利

JP2585248B2 失效
公开(公告)号：JP2585248B2
公开(公告)日：1997-02-26
申请号：JP5004187
申请日：1987-03-06
申请人： HITACHI LTD
发明人： SUZUKI SHOJI , KAZAMA TOSHINORI , DAITO HIROSHI , TAKEUCHI YOSHINORI , YAMAGUCHI JUZO
IPC分类号： G11B23/50 , G11B5/60 , G11B21/21 , G11B33/14

14. 发明专利

JPH08221733A MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPH08221733A
公开(公告)日：1996-08-30
申请号：JP2911095
申请日：1995-02-17
申请人： HITACHI LTD
发明人： KAZAMA TOSHINORI , OGUCHI MITSUHIKO , MURAKAMI KAZUHISA
IPC分类号： G11B5/66 , G11B5/738
摘要： PURPOSE: To relieve the attraction of a magnetic head to a magnetic disk medium and to reduce frictional force due to contact by forming a 2nd base film contg. dispersed nonmagnetic particles whose particle size is almost equal to the spacing of the magnetic head in the surface direction on a 1st base film on a nonmagnetic substrate. CONSTITUTION: A Cr layer 7 is formed as a 1st base film on a soda lime glass substrate 6 as a nonmagnetic substrate and a 2nd base film 8 for forming ruggedness is formed on the Cr layer 7. The base film 8 contains nonmagnetic particles 9 blown to and dispersed in the surface and has a desired film thickness. A Cr layer is further formed as a middle layer 10 under a magnetic layer 11 and a magnetic film of a Co-Cr-Ta alloy is formed as the magnetic layer 11. A protective layer 12 of carbon is then formed as the top layer of a disk. The surface of the protective layer 12 has fine ruggedness formed by the 2nd under film 8.

15. 发明专利

JPH04372703A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH04372703A
公开(公告)日：1992-12-25
申请号：JP15001791
申请日：1991-06-21
申请人： HITACHI LTD
发明人： KATAOKA HIROSHI , MIYAKE YOSHIHIKO , KAZAMA TOSHINORI , MURAKAMI KAZUHISA
IPC分类号： G11B5/187 , G11B25/04
摘要： PURPOSE:To improve the reliability of the operation of the magnetic disk device by suppressing the generation of worn powder, etc., in a head disk assembly. CONSTITUTION:Carbon protective films 15 consisting of an amorphous carbon, etc., are deposited and formed on floating rails 12 (floating surfaces) which are projectingly provided on a slider 11 constituting a magnetic head and faces a magnetic disk. Since the worn powder generated at the time of the contact between the head and the disk is the carbon, the powder is instantaneously burned by the friction heat in the contact section and is annihilated in the form of carbon dioxide.

16. 发明专利

JPH04139674A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH04139674A
公开(公告)日：1992-05-13
申请号：JP26274490
申请日：1990-09-28
申请人： HITACHI LTD
发明人： HIGASHIYA TERUYOSHI , MIYAKE YOSHIHIKO , TAKADA MIKIO , KAZAMA TOSHINORI , KATAOKA HIROSHI , SAITO SUKEO
IPC分类号： G11B21/21 , G11B5/60 , G11B5/66 , G11B5/708 , G11B5/72 , G11B5/725
摘要： PURPOSE:To suppress the inflow of frictional heat to a medium side, and to reduce the vaporization of lubricant by forming a projection consisting of the heat releasing material whose thermal conductivity is larger that of a slider at a floating force generating surface part. CONSTITUTION:The magnetic head slider 20 is provided with slider rails 21, 22 at both sides, and the side surfaces at a side to be in contact with a coating type magnetic recording medium form the floating force generating surfaces 23, 24 to generate floating force. Then, the projections consisting of titanium carbide are formed on the generating surfaces 23, 24. Since the titanium carbide used as the heat radiating material has the large thermal conductivity, the inflow of the frictional heat to the medium is controlled so that the amount of the vaporization of the lubricant applied on the medium is reduced. Besides, the projecting height of the projection is set larger than the coating thickness of the lubricant of the magnetic disk opposed to it and smaller than the floating height of the slider 20 from the surface of the disk. Thus, lubrication effect can be maintained for a long period, and the breakdown of the medium can be prevented.

17. 发明专利

JPH03219483A MAGNETIC HEAD DEVICE 失效
公开(公告)号：JPH03219483A
公开(公告)日：1991-09-26
申请号：JP1248190
申请日：1990-01-24
申请人： HITACHI LTD
发明人： HIGASHIYA TERUYOSHI , MIYAKE YOSHIHIKO , TAKADA MIKIO , KAZAMA TOSHINORI
IPC分类号： G11B23/50 , G11B21/21
摘要： PURPOSE:To thoroughly and efficiently eliminate the particle of dust or the like stuck on the surface of a disk even while a device is operated by symmetrically forming triangular wing-like projecting parts to the incoming ends of rails on the both sides of a floating type magnetic head slider. CONSTITUTION:As for the positional relation between head incoming ends 11 and 12 and the triangular wing-like projecting parts 15 and 16, the incoming end 12 of the slider rail 14 on the inside circumference side of a slider 10 is positioned to the outside circumference from the projecting part 16, and the incoming end 11 of the slider rail 13 on the outside circumference side is positioned to the inside circumference from the projecting part 15. In the case that a magnetic head is moved by a seaking action, the particle attached on the rotating magnetic disk contacts with the side edge parts 17 and 18 of the projecting parts, first, and it is scraped by the side edge parts 17 and 18. Besides, it is carried along the front edge part and the surface of the disk is cleaned without catching the scraped dust from the tapered part of the incoming end.

18. 发明专利

JPS63161514A MAGNETIC HEAD SLIDER 失效
公开(公告)号：JPS63161514A
公开(公告)日：1988-07-05
申请号：JP30666086
申请日：1986-12-24
申请人： HITACHI LTD
发明人： SUZUKI SHOJI , KAZAMA TOSHINORI , MOCHIDA JIRO , DAITO HIROSHI
IPC分类号： G11B5/60 , G11B21/21
摘要： PURPOSE:To prevent a fault by providing at least one gas discharge exist penetrating to the rear face of a magnetic head slider from the opposed face with a magnetic medium to the upper stream of a taper part being a gas flowout end of a flat rail part so as to remove dust. CONSTITUTION:The gas compressed by the flowing end taper 2 and the flat rail 3 of the magnetic head slider 1 is moved to the downstream of the magnetic head slider 1 as shown in the arrow according to the motion of the magnetic disk 5. The gas includes the dust 6 and in providing a gas discharge hole 7 to part of the flat rail part 3, part of the gas compressed by the flat rail 3 flows naturally to the rear face of the magnetic head slider 1 and the dust 6 therein is discharged at the same time. Thus, the dust 6 invaded in the floating rail 3 of the magnetic head slider 1 is excluded before the gas reaches the gas flowing end taper 4 being a negative pressure part of the rail 3.

19. 发明专利

JPS63148487A CONTROLLER FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPS63148487A
公开(公告)日：1988-06-21
申请号：JP29494586
申请日：1986-12-12
申请人： HITACHI LTD
发明人： MIYAKE YOSHIHIKO , OZAKI SHOJI , KURANO AKIRA , OKAMOTO NOBUYUKI , MOCHIDA JIRO , KAZAMA TOSHINORI
IPC分类号： G11B33/14
摘要： PURPOSE:To prevent head crash by providing a crash prevention control means which causes a magnetic head to seek at least to two specific cylinders which are set in the maximum floatation area of the magnetic head in a seek range after a set time passes and removes dust and dirt adhered on a head slider surface. CONSTITUTION:The crash prevention control means 4 causes the magnetic head 13 to seek after previously set time passes irrespective of a seek instruction from a host unit. Furthermore, the magnetic head 13 is caused to seek at least to two specific cylinders which are set in the maximum floatation area in the seek range. While the magnetic head 13 is in a seek action for writing into/ reading from the magnetic disk disk 11, dust and dirt adhered to the head slider surface can be shaked off. Furthermore, the magnetic head 13 does not seek from the cylinder on an outer peripheral side with a large floatation quantity to that on a central side with a small floatation quantity in a state that dust and dirt still adhered to the head slider surface. Thus, head crash can securely be prevented due to the seek action.

20. 发明专利

JPS62277259A MAGNETIC DISK SURFACE MACHINING RESIDUE REMOVING METHOD 失效
公开(公告)号：JPS62277259A
公开(公告)日：1987-12-02
申请号：JP11937886
申请日：1986-05-26
申请人： HITACHI LTD
发明人： KATAOKA HIROSHI , MIYAKE YOSHIHIKO , HONDA MASANOBU , KAZAMA TOSHINORI , FUMIOKA JIYUN
IPC分类号： B24B21/00 , G11B5/84
摘要： PURPOSE:To sufficiently remove a residue by bringing a velvet tape into pressure contact with the surface of a rotating disk by means of a roller of a rubber type elastic body, and moving a pressure contacting position in the radial direction of said disk while feeding said velvet tape in its length direction. CONSTITUTION:Velvet has a marked cleaning force as compared with a woven cloth like gauze, etc. This velvet is brought into pressure contact with the surface of a magnetic disk 1 while moved in the radial direction of the disk 1, thereby, carrying out the cleaning of the whole surface of the disk efficiently. A pressure contact roll 12 of a rubber type elastic body maintains a pressure contact force which is set at the optimum value over a relatively large area, irrespective of more or less vibration on the disk surface. Further, by using a tape type velvet 8 and feeding it in its longitudinal direction, a new velvet face is always fed in a pressure contacting position, to maintain uniform and sufficient cleaning force over the whole surface of the disk. Accordingly, a surface machining residue is sufficiently removed.

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