专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2004253061A Magnetic disk device and magnetic head slider 审中-公开
公开(公告)号：JP2004253061A
公开(公告)日：2004-09-09
申请号：JP2003042755
申请日：2003-02-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TSUCHIYAMA RYUJI , KODAIRA HIDEKAZU , MATSUMOTO MASAAKI , TOKUYAMA MIKIO , JO KINKOKU , HASHIMOTO SEIJI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To simultaneously reduce a slider contact vibration with a smooth medium surface, a floating amount fluctuation with respect to medium surface undulation, and a pressure change around a slider.
SOLUTION: The ratio δs/δr of the step depth δs of a magnetic head slider to a recess depth is set within the range of 0.24≤δs/δr≤0.34 in a 2.5 inch disk device, and within the range of 0.20≤δs/δr≤0.32 in a 1.0 inch disk device. The tilting angle θ2 of the air flow-in end of a flow-out pad 12 is set to θ2≤54° in the 2.5 inch disk device, and to θ2≤58.2° in the 1.0 inch disk device. Thus, the magnetic head slider excellent to be made into high-density recording, made high in reliability and low in cost and the magnetic disk device are obtained.
COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2004022115A Head slider 审中-公开
公开(公告)号：JP2004022115A
公开(公告)日：2004-01-22
申请号：JP2002177878
申请日：2002-06-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAZAKI TAKANORI , KODAIRA HIDEKAZU , MATSUMOTO MASAAKI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To extend a useable recording region of a magnetic disk, and to obtain a proper follow-up property to the magnetic disk, without miniaturizing the dimension of a magnetic head slider itself.
SOLUTION: A disk facing surface 4 consists of a groove part 7 which continues from an air inflow end 2 and which does not influence the floating characteristic and a floating surface 5 which has the floating characteristic. The floating surface 5 is composed of a step bearing surface 8a positioned on the side from the groove part 7 to an air outflow end 3, rail surfaces 6a and 6b, and a negative pressure groove 9.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2004013931A Magnetic recorder and magnetic head 审中-公开
公开(公告)号：JP2004013931A
公开(公告)日：2004-01-15
申请号：JP2002161637
申请日：2002-06-03
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASAKI SHINJI , KURITA MASAYUKI , MATSUMOTO MASAAKI
IPC分类号： G11B5/09 , G11B5/02 , G11B5/17 , G11B5/31 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To evade problems such as the increase of danger of crush with respect to the projection of a recording/reproducing element surface of a magnetic head in company with the temperature rise and the increase of thermal asperity (TA), and also to attain the stable write-in and read-in to a medium.
SOLUTION: A middle point is arranged in a coil of a recording element and set to a ground potential or the floating state at the recording operation to the medium, and the recording is made by making recording signal currents to flow into both ends of the coil so as to become the opposite phases each other with respect to the middle point. At the read-in from the medium, a magnetic signal on the medium is detected by an element used exclusively for reproduction, and simultaneously, heating currents are made to flow into both ends of the coil so as to become the same phases each other with respect to the middle point of the coil of recording element. The increase of danger of crush with respect to the projection of the recording/reproducing element surface of the magnetic head in company with the temperature rise and the increase of TA, or the like are evaded, and the stable write-in and read-in operations to the medium can be realized.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2003308670A Magnetic disk unit 审中-公开
标题翻译：磁碟单元
公开(公告)号：JP2003308670A
公开(公告)日：2003-10-31
申请号：JP2002109867
申请日：2002-04-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KURITA MASAYUKI , JO KINKOKU , MATSUMOTO MASAAKI , TSUCHIYAMA RYUJI , TOKUYAMA MIKIO , INOUE YOICHI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To reduce the effect on a recording and reproducing element, or a slider, or a magnetic disk when the recording and reproducing element or the slider is in contact with the magnetic disk and to detect the contact of the recording and reproducing element or the slider with the magnetic disk. SOLUTION: The slider is provided with a floating amount control means using a piezoelectric actuator. An applied voltage including DC and AC components is applied to the piezoelectric actuator. Increasing gradually the DC component approaches the tip of the actuator to the magnetic disk while the tip of the actuator is minutely vibrated by the AC component. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：当记录和再现元件或滑块与磁盘接触时，为了减小对记录和再现元件，滑块或磁盘的影响，并且检测到记录和再现元件或滑块与磁盘。解决方案：滑块设有使用压电致动器的浮动量控制装置。将包括DC和AC分量的施加电压施加到压电致动器。致动器的前端通过AC部件微动振动，逐渐地逐渐增加致动器的尖端到达磁盘。版权所有（C）2004，JPO

5. 发明专利

JP2002343049A NEGATIVE PRESSURE SLIDER HAVING FLOATING HEIGHT REGULATING MECHANISM 失效
公开(公告)号：JP2002343049A
公开(公告)日：2002-11-29
申请号：JP2001147207
申请日：2001-05-17
申请人： HITACHI LTD
发明人： KODAIRA HIDEKAZU , KURITA MASAYUKI , MATSUMOTO MASAAKI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To simultaneously realize the higher capacity and higher reliability of a magnetic disk device by lowering a floating height only in recording and reproducing. SOLUTION: The negative pressure slider having a magnetic head has a movable section which is expandable and contractrable in the height direction of the slider at the air outflow end of the negative pressure slider. When this movable section extends, the end face of the movable section retracts from the floating surface of the negative pressure slider and when the movable section does not extend, the end face of the movable section exists approximately flush with the negative pressure groove surface of the negative pressure slider or retracts therefrom. In addition, the magnetic head performs recording and reproducing.

6. 发明专利

JP2002150735A MAGNETIC DISK DEVICE AND ITS CONTROL METHOD 失效
公开(公告)号：JP2002150735A
公开(公告)日：2002-05-24
申请号：JP2000337510
申请日：2000-11-06
申请人： HITACHI LTD
发明人： KURITA MASAYUKI , MATSUMOTO MASAAKI , OTANI YUICHI , MIYAKE YOSHIHIKO , HIGUCHI SHINSUKE , TANAKA HIDEAKI , JO KINKOKU
IPC分类号： G11B5/48 , G11B5/54 , G11B5/56 , G11B5/58 , G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk device capable of sharply shortening the contact time of a recording/reproducing element and a magnetic disk and to provide a method for controlling the device. SOLUTION: At the time of receiving a recording or reproducing instruction in/from a magnetic disk 3, a driving means 8 gradually narrows a distance between the recording/reproducing element 2 and the disk 3, and when a detection means detects contact between the element 2 and the disk 3, shifts the element 2 only a fixed distance in a direction of extending the distance. Since low floating quantity corresponding to high recording density can be realized independently of using environments such as the working dispersion of each magnetic head slider 1 and an atmospheric pressure difference and the contact time of the element 2 and the disk 3 can be sharply reduced, the occurrence of contact vibration and thermal asperity can be prevented, so that linear recording density can be increased, the capacity of the magnetic disk device can be increased and the size of the device can be reduced.

7. 发明专利

JP2001291218A INSPECTION DEVICE OF MAGNETIC HEAD SLIDER, MAGNETIC DISK FOR INSPECTION AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2001291218A
公开(公告)日：2001-10-19
申请号：JP2000106882
申请日：2000-04-07
申请人： HITACHI LTD
发明人： HIGASHIYA TERUYOSHI , MATSUMOTO MASAAKI , YOSHIDA AKIRA , NAKAZAWA TAKESHI
IPC分类号： G11B5/455 , G11B5/00 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide an inspection device for discriminating whether a magnetic head slider is accepted or not before being mounted on a magnetic disk device by taking the contact between a magnetic head slider and the disk into consideration. SOLUTION: This inspection device of magnetic head slider inspects the magnetic head slider by using a read/write tester which is furnished with the magnetic disk, a rotating mechanism to rotate the magnetic disk, a mounting part of magnetic head slider, a positioning mechanism of magnetic head slider, a reading/writing circuit for a read/write signal, and a control part for controlling the operation of the whole device, then the decision is made whether the magnetic head slider is accepted or not in such a manner that the floating amount of the magnetic head slider is successively reduced and the changing amount of the time interval between read out signals of the signal written into the magnetic disk in the circumferential direction of the magnetic disk is measured every time the floating amount is reduced, then the changing amount of the time interval is compared with the allowable value of the time interval changing amount to detect that the reduction of the floating amount is repeated by specific times.

8. 发明专利

JP2000057724A MAGNETIC HEAD SLIDER AND MAGNETIC DISK DEVICE USING THE SAME 失效
公开(公告)号：JP2000057724A
公开(公告)日：2000-02-25
申请号：JP22074998
申请日：1998-08-04
申请人： HITACHI LTD
发明人： KODAIRA HIDEKAZU , MATSUMOTO MASAAKI , HASHIMOTO SEIJI , ENDO MASAYOSHI , TAKAKURA AKIO , TAKEUCHI YOSHINORI , HIGUCHI SHINSUKE , IIDA AKIRA
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To make almost uniform a floating profile on a flatland, to reduce amounts of floating decrease accompanying the decrease of air pressure at a highland, and to make almost uniform amounts of floating decreasing across the whole face of a magnetic disk in a magnetic head slider equipped with an air inflow edge, floating face, and air outflow edge. SOLUTION: A magnetic head slider 1 is constituted as a negative pressure slider equipped with a floating face 3 constituted of a front step bearing 5 having sub-micron depth continuously formed from an air inflow edge 2, rail face 6 continuously formed from the front step bearing 5, negative pressure groove 11 deeper than the front step bearing 5 continuously formed from the rail face 6, and side step bearings 7 and 8 having the same depth as that of the front step bearing 5 continuously formed from the rail face 6. Also, the rate of depth R of the negative groove 11 to depth δs of the front step bearing 5 is set as R/δs>5.

9. 发明专利

JPH11328896A SLIDER SUPPORTING MECHANISM AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH11328896A
公开(公告)日：1999-11-30
申请号：JP12766798
申请日：1998-05-11
申请人： HITACHI LTD
发明人： MATSUMOTO MASAAKI , OKAZAKI TOSHIHISA , SUGAWARA SHUICHI , WAKATSUKI KOSAKU , HAGITANI SHINOBU , KODAIRA HIDEKAZU
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To bring a slider into close contact to a surface of a magnetic disk without uneven contact and to stably float the slider by rotation of a magnetic disk. SOLUTION: In a magnetic disk device in which slider length Ls is 1.4 mm or less, slider width Bs is 1.1 mm or less, distance L between the center of a bending part for occurrence of a load and a tip of the slider is 10 mm or less, and a load for the slider is less than 9.8 mN; the rotary moment of the slider caused by a tilt θp in the direction of pitching generated by dispersions of setting height, accuracy in forming suspension, and the like through a gimbal part is made smaller than the rotary moment with which the slider is pressed by a load. Also, the rotary moment of the slider caused by a tilt θr in the direction of rolling generated by accuracy of forming suspension, accuracy of attaching part and the like through a gimbal part is made smaller than the rotary moment with which the slider is pressed by a load.

10. 发明专利

JPH10283745A NEGATIVE-PRESSURE SLIDER AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH10283745A
公开(公告)日：1998-10-23
申请号：JP8902197
申请日：1997-04-08
申请人： HITACHI LTD
发明人： KODAIRA HIDEKAZU , MATSUMOTO MASAAKI , HASHIMOTO SEIJI , YONEKAWA SUNAO , ENDO MASAYOSHI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a negative-pressure slider with a small scattering in the amount of floating even if the length of an air introduction part for generating a negative pressure changes due to a machining scattering by reducing the accumulation of a lubricant at the groove part of the air bearing surface of a slider and the increase in the adhesive force between the slider and a disk storage medium, and a magnetic disk device using the negative-pressure slider. SOLUTION: A negative-pressure slider 100 has air introduction parts 130 and 132, cross rails 120 and 122, side rails 110 and 112, a first groove part 140, and a magnetic transducer 180. Further, the negative-pressure slider 100 has a second groove part 160 that is provided to separate air introduction parts 130 and 132 being provided to separate the air introduction parts 130 and 132 at the air flow-in edge side of the slider and a slit 150 that is provided to connect the first groove part 140 and the second groove part 150 and to separate the cross rails 120 and 122. Also, a width W2 of a part where the air introduction parts 130 and 132 are connected to the cross rails 120 and 122 is made narrower than a width W3 of a part where the side rails 110 and 112 are connected to the cross rails 120 and 122.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式