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1. 发明专利

JP2006127681A Magnetic recording medium and its manufacturing method, and magnetic recording and reproducing device 审中-公开
标题翻译：磁记录介质及其制造方法和磁记录和再现装置
公开(公告)号：JP2006127681A
公开(公告)日：2006-05-18
申请号：JP2004316616
申请日：2004-10-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TSUCHIYA HIROKO , MOCHIZUKI MASABUMI , TAKAHASHI TERUO , IKEGAME HIROSHI
IPC分类号： G11B5/667 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/84
CPC分类号： G11B5/855 , G11B5/667 , G11B5/7325 , G11B5/8404
摘要： PROBLEM TO BE SOLVED: To provide a discrete track type perpendicular magnetic recording medium which is excellent in crystal orientation and perpendicular magnetic anisotropy of a magnetic recording layer, obviates deterioration of the magnetic characteristics of the magnetic recording layer due to processing, is inexpensive in manufacturing cost, and does not require a complicated manufacturing process and to provide its manufacturing method. SOLUTION: The perpendicular magnetic recording medium has rugged pattern structure comprising projecting parts corresponding to the positions of data tracks 55 for recording magnetic information and recessed parts corresponding to the positions between the data tracks on the surface on a medium floating surface side of a soft magnetic backing layer 52 and is laminated with a base layer 53 and the magnetic recording layer 54 for crystal orientation control along the rugged pattern structure on the projecting parts and the recessed parts without omission. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供磁记录层的晶体取向和垂直磁各向异性优异的离散轨道型垂直磁记录介质，消除了由于处理而导致的磁记录层的磁特性的劣化，是制造成本低廉，并且不需要复杂的制造工艺并提供其制造方法。解决方案：垂直磁记录介质具有粗糙的图案结构，其包括对应于用于记录磁信息的数据轨道55的位置的突出部分和对应于在介质浮动表面侧的表面上的数据轨道之间的位置的凹部柔性磁性背衬层52，并且在突出部分和凹陷部分上沿着凹凸图案结构层叠有基底层53和用于晶体取向控制的磁记录层54，而没有遗漏。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2004164783A Magnetic head for perpendicular recording, and magnetic disk device mounting same 有权
公开(公告)号：JP2004164783A
公开(公告)日：2004-06-10
申请号：JP2002331534
申请日：2002-11-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MOCHIZUKI MASABUMI , NAKAMURA ATSUSHI , MARUYAMA YOJI
IPC分类号： G11B5/667 , G11B5/00 , G11B5/127 , G11B5/147 , G11B5/17 , G11B5/265 , G11B5/31 , G11B5/33 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/1278 , G11B5/17 , G11B5/2652 , G11B5/313 , G11B5/332 , G11B5/3903 , G11B5/3909 , G11B5/3967 , G11B2005/001 , G11B2005/0013 , G11B2005/0016 , G11B2005/0029 , G11B2005/3996
摘要： PROBLEM TO BE SOLVED: To reduce disturbance of recording bits of a recording layer and noise in reproducing caused by a magnetic field generated from a backing layer without decreasing the recording magnetic field intensity of a magnetic head.
SOLUTION: The magnetic head includes a recording head provided with a main magnetic pole and one or more auxiliary magnetic poles, a reproducing head provided with a reproducing element; exciting coils having different magnetomotive force located on both sides of the main magnetic pole in a manner to sandwich the main magnetic pole, the magnetomotive force for exciting the main magnetic pole is made asymmetrical; and thereby, the magnetic flux density flowing through the backing layer is decreased without decreasing the recording magnetic field intensity of the magnetic head, and thus the disturbance od recording bits and noise in reproducing caused by the magnetic field generated from the backing layer can be reduced.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2004062946A Magnetic head, head gimbal assembly, magnetic recording device, manufacturing method thereof, and method for controlling magnetic recording device 审中-公开
公开(公告)号：JP2004062946A
公开(公告)日：2004-02-26
申请号：JP2002216993
申请日：2002-07-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ICHIHARA TAKAYUKI , MOCHIZUKI MASABUMI , KAWATO YOSHIAKI
IPC分类号： G11B5/31 , G11B5/02 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a single magnetic pole head capable of preventing destruction of recorded magnetization information by suppressing a magnetic field generated from a tip by the residual magnetization of a main magnetic pole, and to provide a perpendicular magnetic recording device.
SOLUTION: This device is provided with: a main magnetic pole for recording information on a medium; a coil for exciting the main magnetic pole to record information; and a conductive layer disposed at least in the vicinity of the main magnetic pole tip through an insulating layer. Immediately after cutting-off of a current to the coil, a current is supplied to the conductive layer in a main magnetic pole height direction to direct the magnetization of the main magnetic pole in a track width direction, and a magnetic charge on the tip of the main magnetic pole is reduced.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2008052850A Magnetic recording medium and magnetic recording and reproducing device 有权
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：JP2008052850A
公开(公告)日：2008-03-06
申请号：JP2006229709
申请日：2006-08-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TSUCHIYAMA RYUJI , MOCHIZUKI MASABUMI , ONO KYOSUKE , TSUCHIYA HIROKO , IKEGAME HIROSHI
IPC分类号： G11B5/65 , G11B5/72 , G11B5/82
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/743 , G11B5/855
摘要： PROBLEM TO BE SOLVED: To reduce meniscus attractive force while preventing writing in an adjacent track in a discrete track medium and a patterned medium.
SOLUTION: A magnetic recording medium and a magnetic disk device excellent in high density recording and high reliability are provided by forming a magnetic layer of a land part and a patterned part of the discrete track medium and the patterned medium in a cylindrical shell shape and a spherical shell shape having fixed film thickness and changing a height of a cylindrical shell shape protrusion and a height of a spherical shell shape protrusion from 5 nm to 30 nm according to a radial position.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：减少弯液面吸引力，同时防止在离散轨道介质和图案化介质中的相邻轨道中的写入。解决方案：通过将离散轨道介质和图案化介质的纹理部分和图案化部分的磁性层形成在圆柱形壳体中来提供高密度记录和高可靠性的磁记录介质和磁盘装置形状和具有固定膜厚度并且根据径向位置改变圆柱形壳形突起的高度和球形壳形突起的高度为5nm至30nm的球壳形状。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2004103092A Perpendicular recording magnetic head, its manufacturing method, and magnetic disk device having the perpendicular recording magnetic head mounted thereon 审中-公开
公开(公告)号：JP2004103092A
公开(公告)日：2004-04-02
申请号：JP2002262225
申请日：2002-09-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ITOU AKITOMO , KAWATO YOSHIAKI , MOCHIZUKI MASABUMI
IPC分类号： G11B5/31 , G11B5/00 , G11B5/012 , G11B5/127 , G11B5/187 , G11B5/39 , G11B5/48
CPC分类号： G11B5/012 , G11B5/1278 , G11B5/1871 , G11B5/4886 , G11B2005/0029 , Y10T29/49052
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular recording magnetic head capable of recording by high linear recording and track densities, and a magnetic disk device having the perpendicular recording magnetic head mounted thereon. SOLUTION: A primary magnetic pole other than the trailing side of the perpendicular recording magnetic head is tapered to have a proper angle with a floating surface, and a yoke in which the main plane of a largest area is parallel to the floating surface is disposed on the bottom surface of the primary magnetic pole. Thus, the perpendicular recording magnetic head is provided in which a strong magnetic field is generated, and the magnetic field gradient of the trailing side is steep. Additionally, by mounting the head, the magnetic disk device of a high linear recording density is manufactured. COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2003317212A Perpendicular recording magnetic head and magnetic disk drive with the same mounted 审中-公开
标题翻译：具有相同安装性能的磁头和磁盘驱动器
公开(公告)号：JP2003317212A
公开(公告)日：2003-11-07
申请号：JP2002112819
申请日：2002-04-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MOCHIZUKI MASABUMI , ISHIKAWA CHIAKI
IPC分类号： G11B5/31 , G11B5/127
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular recording magnetic head in which such a problem that the recording information on a perpendicular recording medium is erased by the residual magnetic field of a recording magnetic pole after the recording, does not occurs. SOLUTION: The perpendicular recording magnetic head is constituted so as to have a contracted part of which the cross-sectional area parallel to the floating surface is reduced toward the floating surface on a main magnetic pole, and a part with unchanged width of the main pole toward the floating surface direction continuously from the position where the width of the contracted part becomes equal to the width of the main pole stipulating the recording track width on the floating surface, and also to have a part where the cross-sectional area of the surface parallel to the floating surface of the main pole is changed from the floating surface of the main pole at least once or more times in a throat part over the floating surface of the main pole from the position becoming equal to the recording track width nearest to the floating surface in the contracted part. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种垂直记录磁头，其中不会发生记录之后由记录磁极的残留磁场擦除垂直记录介质上的记录信息的问题。解决方案：垂直记录磁头构成为具有与浮动表面平行的横截面朝向主磁极上的浮动面减小的收缩部分，并且具有不变宽度的部分从收缩部的宽度等于在浮动面上规定记录轨道宽度的主极宽度的位置连续地朝向浮动面方向的主极，还具有横截面积平行于主极的浮动表面的表面从主极的浮动表面至少一次或多次在主极的浮动表面上的喉部中从等于记录轨道宽度的位置改变最接近承包部分的浮动面。版权所有（C）2004，JPO

7. 发明专利

JP2003242607A PERPENDICULAR RECORDING MAGNETIC HEAD AND MAGNETIC DISK DRIVE ON WHICH THE MAGNETIC HEAD IS MOUNTED 审中-公开
公开(公告)号：JP2003242607A
公开(公告)日：2003-08-29
申请号：JP2002036126
申请日：2002-02-14
申请人： HITACHI LTD
发明人： NAKAMURA ATSUSHI , MOCHIZUKI MASABUMI , OKADA TOSHIHIRO , ETO KIMITOSHI , NUNOKAWA ISAO , KAWATO YOSHIAKI
IPC分类号： G11B5/31 , G11B5/02 , G11B5/127 , G11B5/187
摘要： PROBLEM TO BE SOLVED: To provide a single magnetic pole head wherein record bleeding is small and a reduction in an effective track width is prevented even when there is a yoke angle in a perpendicular magnetic recording single magnetic pole head, and a magnetic disk drive on which the head is mounted. SOLUTION: A main pole is constituted of at least two portions. The first portion 41 is formed such that a width is continuously increased from the upstream side of a medium moving direction 44 to the downstream side, the second portion 42 is formed to be a width equal to that of the downstream side of the medium moving direction of the first portion, and a width is kept constant from the upstream side of the medium moving direction to the downstream side. Thus, since a reduction in a recording magnetic field at a track edge is prevented, and an effective track width is enlarged while record bleeding is suppressed, the magnetic disk drive of a high track density is provided. COPYRIGHT: (C)2003,JPO

8. 发明专利

JP2003036503A Perpendicular magnetic recording head and magnetic disk drive incorporating it 审中-公开
标题翻译：全磁性记录头和磁盘驱动器
公开(公告)号：JP2003036503A
公开(公告)日：2003-02-07
申请号：JP2001222407
申请日：2001-07-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KURODA ATSUKO , MOCHIZUKI MASABUMI
IPC分类号： G11B5/667 , G11B5/00 , G11B5/012 , G11B5/127 , G11B5/187 , G11B5/31 , G11B5/48
CPC分类号： G11B5/1278 , G11B5/012 , G11B5/187 , G11B5/4886 , G11B2005/0029 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： PROBLEM TO BE SOLVED: To avoid the influence of the leakage magnetic flux and improve the magnetic gradient at the boundary of the recording pit cells on the recording layer in the profile of the perpendicular magnetic components by considering the magnetic flux concentrating section and its position of a perpendicular magnetic recording head and the front and side layout of the main magnetic pole. SOLUTION: The magnetic flux concentrating section 26 of the main pole, and the concentrating position 39 are positioned at the leading side 25 of the perpendicular plane 36 parallel in the direction of the recording track width including the trailing end of the main pole's floating surface. Further, the front of the main pole on the trailing side is positioned at the trailing side of the perpendicular plane, and the side of the main pole crossing the track width at the side of the track center of the plane perpendicular to the recording track width including the track edge at the trailing side of the floating surface. Thus, the gradient of the perpendicular components of the magnetic field can be made steep at the trailing side of the main pole and at both track edges to obtain high surface recoding density.
摘要翻译：要解决的问题：为了避免泄漏磁通的影响，并且通过考虑磁通量集中部分及其位置，可以改善垂直磁性部件的轮廓中记录层上的记录凹槽单元的边界处的磁梯度垂直磁记录头和主磁极的正面和侧面布局。解决方案：主极的磁通集中部分26和集中位置39位于垂直平面36的引导侧25处，其平行于包括主极浮动表面的后端的记录轨道宽度的方向。此外，后侧的主极的前部位于垂直平面的后侧，并且主极的侧面与垂直于记录轨道宽度的平面的轨道中心侧的轨道宽度相交包括在浮动表面的尾侧的轨道边缘。因此，磁场的垂直分量的梯度可以在主极的后侧和两个轨道边缘处陡峭以获得高的表面记录密度。

9. 发明专利

JP2004342164A Magnetic head and magnetic disk unit mounting the same 有权
公开(公告)号：JP2004342164A
公开(公告)日：2004-12-02
申请号：JP2003134660
申请日：2003-05-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MOCHIZUKI MASABUMI , NAKAMURA ATSUSHI , ETO KIMITOSHI
IPC分类号： G11B5/31 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/127 , G11B5/187 , G11B5/23 , G11B5/48
CPC分类号： G11B5/1278 , G11B5/012 , G11B5/09 , G11B5/1871 , G11B5/23 , G11B5/4886 , G11B2005/0029
摘要： PROBLEM TO BE SOLVED: To improve the curve of a magnetization flipping shape of a recording bit cell by making the magnetic field distribution of a recording head linear.
SOLUTION: A single magnetic pole head having a main magnetic pole 1 and an auxiliary magnetic pole 3 is arranged with a magnetic material 32 on a trailing side of the main magnetic pole and the magnetic material is provided with a projecting part 32a projecting toward the main magnetic pole. The width Nw on the side facing the main magnetic pole of the projecting part is made smaller than the width Tww on the trailing side of the main magnetic pole.
COPYRIGHT: (C)2005,JPO&NCIPI

10. 发明专利

JP2004281023A Thin film perpendicular magnetic recording head, its fabrication process, and magnetic disk drive using same 有权
公开(公告)号：JP2004281023A
公开(公告)日：2004-10-07
申请号：JP2003196859
申请日：2003-07-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KAWATO YOSHIAKI , NAKAMOTO KAZUHIRO , HOSHIYA HIROYUKI , OKADA YASUYUKI , MOCHIZUKI MASABUMI
IPC分类号： G11B5/66 , G11B5/127 , G11B5/31 , G11B5/39
CPC分类号： G11B5/3906 , G11B5/1278
摘要： PROBLEM TO BE SOLVED: To provide a thin film perpendicular magnetic recording head which generates a high magnetic recording field exceeding 10kOe while having a narrow main pole coping with a high recording density in excess of 100Gb/in
2 and is modified so as to suppress residual magnetic fields occurring immediately after a recording operation.
SOLUTION: The thin film perpendicular magnetic recording head is provided with a main pole, a return path for supplying a magnetic flux to the main pole, and a conductor coil for excitation of the main pole and the return path, and the main pole has a pole width of 200nm or less and has a magnetic multilayer made of a high saturation flux density layer and a low saturation flux density layer, and the low saturation flux density layer has a thickness within 0.5 to 5nm, and the high saturation flux density layer has a thickness of 10 to 50nm, and thus residual magnetization is suppressed and erasing after recording is prevented by adopting a closre magnetic domain structure in the pole.
COPYRIGHT: (C)2005,JPO&NCIPI

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