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1. 发明专利

JPH076539A MAGNETIC HEAD SLIDER AND MAGNETIC STORAGE DEVICE 失效
公开(公告)号：JPH076539A
公开(公告)日：1995-01-10
申请号：JP14942693
申请日：1993-06-21
申请人： HITACHI LTD
发明人： MATSUMOTO MASAAKI , HAMAGUCHI TETSUYA , SHIROISHI YOSHIHIRO , MIYAKE YOSHIHIKO , NAKAGAWA YOSHIO , TOKUYAMA MIKIO , NAKAMURA SHIGEO , IIDA AKIRA
IPC分类号： G11B5/02 , G11B21/21
摘要： PURPOSE:To attain high recording density by making a space between a head and a disk minute and almost constant and reducing a change of the space due to a manufacturing error on a magnetic storage device. CONSTITUTION:The width or thickness of a part 4 between a slider forward part 2 and a slider backward part 3 mounted with the magnetic head 5 is formed smaller than other parts, and the vicinity of a magnetic pole part of the magnetic head of the slider backward part is kept constant in proximity to or in contact with the magnetic disk, as their relative motion is carried out. Under the stopping or standby state of the device, the shape of the slider forward part in the disk traveling direction is formed to be protrusive toward the magnetic disk, and only during the recording and reproducing time, this protrusive curved amt. is slightly deformed so as to keep the magnetic head 5 constant in proximity to or in contact with the magnetic disk. By this method, contact recording with stable and minute contact force can be achieved in simple constitution, and a gap between the magnetic disk and the magnetic head is kept minute, constant and stable, thus obtaining the magnetic storage device high in reliability and high in recording density.

2. 发明专利

JPH05225735A SUPPORTING MECHANISM FOR MAGNETIC HEAD 失效
公开(公告)号：JPH05225735A
公开(公告)日：1993-09-03
申请号：JP2668492
申请日：1992-02-13
申请人： HITACHI LTD
发明人： MURAKAMI KAZUHISA , MIYAKE YOSHIHIKO , KAZAMA TOSHINORI
IPC分类号： G11B21/21
摘要： PURPOSE:To facilitate sliding and to suppress the occurrence of wearing dust and hence to improve the reliability by providing a low friction surface in an area where a pivot of a head slider is brought into contact with other member. CONSTITUTION:The head slider 10 is oscillated around a contact point between the pivot 20 and a block 22 as a center by generating lift upon rotation of a magnetic disk, and is floated under balance of the lift and a spring 12. At the time of oscillating the slider 10, the pivot 20 is under rolling contact with the slider 10 Consequently, the smaller the friction of the two parts the easier the slider 10 in its posturizing change, so that the mechanism is equipped with the block 22 of a low friction material. By this method, even when the pivot 20 is worn off, the slider 10 is stably floated. Moreover, wearing of the pivot 20 and the slider 10 is decreased, and also there is no contamination of wearing dust, and then head crush against a magnetic disk 25 is minimized.

3. 发明专利

JPH0562148A CONTINUOUS THIN-FILM TYPE MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPH0562148A
公开(公告)日：1993-03-12
申请号：JP22201991
申请日：1991-09-03
申请人： HITACHI LTD
发明人： KAZAMA TOSHINORI , MIYAKE YOSHIHIKO , MURAKAMI KAZUHISA
IPC分类号： G11B5/66 , G11B5/72 , G11B5/725 , G11B5/82
摘要： PURPOSE:To provide a continuous thin-film type magnetic disk medium with a high reliability by lubricating a surface of a data zone over a long period of time. CONSTITUTION:A concentric groove 15 is formed at a protection film of a non-data zone 8 of a magnetic disk and further a radial groove 14 is formed at a protection film of a data zone 7, thus enabling a lubricant which stays at the groove 15 to be supplied to the data zone 7 through the groove 14 and the data zone to be lubricated over a long period of time.

4. 发明专利

JPH04349285A MAGNETIC DISK EVALUATING DEVICE 失效
公开(公告)号：JPH04349285A
公开(公告)日：1992-12-03
申请号：JP12092091
申请日：1991-05-27
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： IIDA MUNEO , TAKADA MIKIO , MIYAKE YOSHIHIKO , TATEYAMA KENICHI , YOKOYAMA NOBUHIRO
IPC分类号： G11B25/04
摘要： PURPOSE:To grasp influence imparted to the floating characteristic of a magnetic head by generating the contaminating substance of gas state from a material heating part placed in a magnetic disk evaluating device. CONSTITUTION:This device is constituted of the magnetic disk evaluating device placing the material heating part, a sampling bag 16, and the above-mentioned magnetic disk device, a heating vessel to mount and seal the above-mentioned sampling bag and a temperature control equipment to heat the above-mentioned heating vessel with high temperature. This device is effective for the explication of the generating mechanism of head crush by the gas state contaminating substance and for the selection of parts and material generating a little gas state contaminating substance.

5. 发明专利

JPH03295086A MAGNETIC DISK DEVICE AND MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH03295086A
公开(公告)日：1991-12-26
申请号：JP9644890
申请日：1990-04-13
申请人： HITACHI LTD
发明人： GOMI KENICHI , TANAKA HIDEAKI , SAWAHATA SHOICHI , OURA MASAKI , MIYAKE YOSHIHIKO , KATO YOSHIKI , UTA KATSUO
IPC分类号： G11B5/82 , C09D5/23 , C09D7/12 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/738 , G11B21/21 , G11B25/04
摘要： PURPOSE:To maintain the floating stability of a magnetic head over a long period by making a part surrounded by plural slots to be flat substantially, selecting a ratio of integrated area of projections in projection regions to be a specific range and selecting the height of the projections to be within a prescribed height. CONSTITUTION:Plural continuous or discontinuous slots are provided on the surface of a disk 14 and parts surrounded by the slots are formed substantially flat. Then a ratio of integrated area of projections 7 in the unit of area in projection regions is selected to be 0.5% or over and 90% or below, and the height of the projections is selected to be almost same within a range higher than 5nm and lower than 40nm. Moreover, the magnetic disk 14 and the magnetic head are opposite to each other during rotation at a minute gap of 0.01 - 0.2mum and supported by a slider. Then the floating quantity of the head is selected to be 0.15mum or below to make the recording density of the magnetic disk 14 high.

6. 发明专利

JPS61196487A CORE SLIDER FOR MAGNETIC HEAD AND ITS WORKING METHOD 失效
公开(公告)号：JPS61196487A
公开(公告)日：1986-08-30
申请号：JP3634885
申请日：1985-02-27
申请人： HITACHI LTD
发明人： SETONE SHOICHI , SAITO SUKEO , DAITO HIROSHI , TSUJI GIICHI , HAGIWARA YOSHIKI , YOSHIMATSU TOSHIKANE , TAKAHASHI HATSUO , MIYAKE YOSHIHIKO , MOCHIDA JIRO , SHIROKURA TAKAAKI , KAZAMA TOSHINORI
IPC分类号： G11B5/60 , G11B21/21
摘要： PURPOSE:To largely lower an influence when a magnetic head strikes against a magnetic disk, by forming a first chamfer section at both ends a side rail and at the same time forming a second chamber section to one end of a center rail. CONSTITUTION:Only a flowing out end B of a center rail 3 is not R chamfered but at the same time, at a flowing in end A and a flowing out end B of a side rail 2, R chamfering sections 4 and 5 are formed. Namely, at the flowing out end B of an air in a core section 101, a chamfering section 13 is formed and at the same time, both the flowing in ends A and B of the air in the side rail 2 of a slider section 102, the chamfering sections 5 and 4 are formed. Thereby, a level of a bil lowering and the number of a generation is decreased and the influence applying to a magnetic disk is largely lowered.

7. 发明专利

JPS60140536A MAGNETIC DISC MEDIUM 失效
公开(公告)号：JPS60140536A
公开(公告)日：1985-07-25
申请号：JP25038283
申请日：1983-12-28
申请人： HITACHI LTD
发明人： TAKASAGO HIDEKAZU , NAGAIKE SADAKUNI , KAZAMA TOSHINORI , IMAMURA MASAAKI , MIYAKE YOSHIHIKO
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , G11B5/82
摘要： PURPOSE:To enhance the strength of a coated film without damaging electric characteristics, the surface shape, the head floating capacity, etc. of a magnetic disc by using materials having a high thermal conductivity as a coated film reinforcing material. CONSTITUTION:A magnetic powder 4 and a coated film reinforcing material 2 are mixed and dispersed in a thermosetting resin and are applied onto an aluminium substrate 3. Materials having a thermal conductivity >=0.01cal/cm.sec. deg.C are used as the coated film reinforcing material 2. When a magnetic head 1 collides with a magnetic coated film 5, it is heated by intensive friction to the coated film reinforcing material 2. Since the particle size of the reinforcing material 2 is larger than the thickness of the magnetic coated film 5, the reinforcing material 2 and the magnetic head 1 rub against each other, and generated heat is diffused easily because the thermal conductivity of materials used as the coated film reinforcing material 2 is high, and generated heat is diffused to the aluminium substrate 3 and is not stored in the coated film 5, and thus, thermal decomposition and vaporization of a lubricant and destruction of a binder are difficult, and destruction of the coated film 5 is delayed.

8. 发明专利

JPS59218682A Magnetic disk device 失效
标题翻译：磁盘设备
公开(公告)号：JPS59218682A
公开(公告)日：1984-12-08
申请号：JP9316783
申请日：1983-05-26
申请人： Hitachi Ltd
发明人： IIDA MUNEO , TADA SEIJI , TOMITA MASANOBU , MIYAKE YOSHIHIKO , TAKAHASHI HATSUO
IPC分类号： G11B25/04 , G11B33/14
CPC分类号： G11B33/14
摘要： PURPOSE:To lower evenly the temperature inside a magnetic disk device and at the same time to reduce greatly the vertical deflection of the magnetic disk, by providing both the internal and external air circulation systems. CONSTITUTION:The cool air supplied from a blower 7 is cleansed by an external filter 8 and sent into a cover 9. This air passes a route 19 and is mixed with the air that flows out of head slots 17a and 17b of an internal shroud 6 as well as an air current produced by the revolution of a magnetic disk 1. This mixture air is sent into an air cleaning filter 12 and flows out toward the outer circumference of the disk 1 through a blow-out port 11 of a spacer 2 after passing through a spindle (internal air circulation system). While another air current flows outside the cover 9 through a discharge port 16 and does not flow into the shroud 6 (external air circulation system). These two systems are actuated at a time to mix the external cool air with the internal warm air and to send this mixture air into the shroud 6. As a result, the temperature is unified within a magnetic disk device. This reduced the vertical deflection degree of the disk 1.
摘要翻译：目的：通过提供内部和外部空气循环系统，均匀地降低磁盘设备内的温度，同时大大减小磁盘的垂直偏转。构成：从鼓风机7供给的冷空气由外部过滤器8清洗并送入盖9中。该空气通过路线19并与从内部护罩6的头部狭缝17a和17b流出的空气混合以及由磁盘1的旋转产生的气流。该混合空气被送入空气净化过滤器12中，并通过间隔件2的吹出口11向盘1的外周流出。通过主轴（内部空气循环系统）。而另一气流通过排出口16流过罩9外部并且不流入护罩6（外部空气循环系统）。这两个系统一次被致动以将外部冷空气与内部暖风混合，并将该混合物空气送入护罩6.结果，将温度统一在磁盘装置内。这降低了盘1的垂直偏转程度。

9. 发明专利

JP2002230930A MAGNETIC DISK 失效
公开(公告)号：JP2002230930A
公开(公告)日：2002-08-16
申请号：JP2001019389
申请日：2001-01-29
申请人： HITACHI LTD
发明人： KURITA MASAYUKI , MATSUMOTO MASAAKI , TANAKA HIDEAKI , MIYAKE YOSHIHIKO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk which attains a high density recording with a slider structure capable of stably holding the minimum floatation amount. SOLUTION: An air bearing surface is formed and an element pad mounting a recording and reproducing element is arranged independently of a floatation pad which generates air pressure being balanced with a load. The area of the element pad is set to be between 0.001 mm2 and 0.01 mm2 in order to suppress pressure being newly generated when the element pad approaches a disk surface to be within a range not to influence to the floatation amount.

10. 发明专利

JP2000099942A MAGNETIC DISK AND SUBSTRATE FOR MAGNETIC DISK 失效
公开(公告)号：JP2000099942A
公开(公告)日：2000-04-07
申请号：JP30798499
申请日：1999-10-29
申请人： HITACHI LTD
发明人： TANAKA HIDEAKI , GOMI KENICHI , SAWAHATA SHOICHI , KONDOU MAKI , OURA MASAKI , MIYAKE YOSHIHIKO , KATO YOSHIKI , OKUWAKI TOYOJI , OKAMOTO NORIAKI , NAKAGAWA YOSHIO
IPC分类号： G11B5/82
摘要： PROBLEM TO BE SOLVED: To improve floating stability by providing a magnetic disk with many projecting parts projecting from a front surface at a height larger than the surface roughness of the front surface, arranging these projecting parts spirally with respect to the center of the magnetic disk within specific heights and distributions and confining the offsets in the radial direction between the adjacent projecting parts to the width in the radial direction of the projecting parts or below. SOLUTION: The height of the projecting parts is confined to >=5 to

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