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81. 发明申请

US20060092566A1 Double notched shield and pole structure for stray field reduction in a magnetic head 失效
标题翻译：用于磁头中杂散场减少的双切口屏蔽和极结构
公开(公告)号：US20060092566A1
公开(公告)日：2006-05-04
申请号：US10977446
申请日：2004-10-29
申请人： Kuok Ho , Yimin Hsu , Ching Tsang
发明人： Kuok Ho , Yimin Hsu , Ching Tsang
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/11 , G11B5/1278 , G11B5/3146
摘要： A double notched magnetic structure for use in a magnetic head for avoiding stray field writing. The structure could be a magnetic shield, magnetic pole of a write head or some other magnetic structure used in a magnetic head of a magnetic recording system, and has notches formed at both the front end (adjacent to the ABS) and at the back end (away from the ABS). The notches at the front end form a forward protruding portions that performs the necessary function of the structure, such as magnetic shielding, and has laterally extending recessed portions (recessed by the front notches) that move the flux focal points of the structure away from the ABS to avoid stray field writing. The back notches form a backward extending portion that affects the geometry of the structure to prevent the focusing of magnetic flux caused by stray magnetic fields having a component perpendicular to the ABS.
摘要翻译：用于磁头中的双切口磁结构，用于避免杂散场写入。该结构可以是磁屏蔽，写磁头的磁极或磁记录系统的磁头中使用的一些其它磁性结构，并且在前端（邻近ABS）和后端形成有缺口（远离ABS）。前端的凹口形成一个向前突出的部分，其执行诸如磁屏蔽的结构的必要功能，并且具有横向延伸的凹陷部分（由凹槽凹陷），该凹陷部分将结构的通量焦点移动离开 ABS避免杂散场写入。后凹口形成一个向后延伸部分，该部分影响结构的几何形状，以防止由具有垂直于ABS的分量的杂散磁场引起的磁通聚焦。

82. 发明申请

US20060092562A1 Winged design for reducing corner stray magnetic fields 失效
公开(公告)号：US20060092562A1
公开(公告)日：2006-05-04
申请号：US10977315
申请日：2004-10-29
申请人： Kuok Ho , Yimin Hsu , Masafumi Mochizuki , Ching Tsang , Roger Wood
发明人： Kuok Ho , Yimin Hsu , Masafumi Mochizuki , Ching Tsang , Roger Wood
IPC分类号： G11B5/17
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/315
摘要： Embodiments of the present invention are directed to structures of a recording head having a winged design for reducing corner stray magnetic fields. In one embodiment, the present invention comprises a magnetic recording head comprising a plurality of components. In embodiments of the present invention at least one of the plurality of components comprises a surface exposed to an air bearing surface when in operation with a recording medium. The surface exposed to the air bearing surface comprises notched edges for constraining corner stray magnetic fields associated therewith.

83. 发明申请

US20060067001A1 Thermally assisted recording of magnetic media using a rosonant cavity and energy 有权
标题翻译：使用rosonant腔和能量对磁性介质进行热辅助记录
公开(公告)号：US20060067001A1
公开(公告)日：2006-03-30
申请号：US10955691
申请日：2004-09-30
申请人： Yimin Hsu , Chie Poon , Timothy Strand
发明人： Yimin Hsu , Chie Poon , Timothy Strand
IPC分类号： G11B5/60
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic head including a media heating device including an optical cavity resonator that produces a high intensity near-field optical beam adjacent to the write pole. Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through an aperture that is placed proximate an antinode or post within the cavity. The write pole tip may serve as the post in certain embodiments. The media heating device is preferably fabricated between the first and second magnetic pole layers of a perpendicular magnetic head and close to the ABS surface of the head. An alternative embodiment may include a near field aperture disposed between the resonant cavity and the ABS.
摘要翻译：一种磁头，包括介质加热装置，该介质加热装置包括产生与写入极相邻的高强度近场光束的光腔谐振器。光能通过放置在腔附近的波导耦合到谐振腔中，并且光能通过放置在腔内的波腹或柱附近的孔耦合到空腔外。在某些实施例中，写极尖可以用作柱。介质加热装置优选地制造在垂直磁头的第一和第二磁极层之间并且靠近头部的ABS表面。替代实施例可以包括设置在谐振腔和ABS之间的近场孔。

84. 发明申请

US20060044680A1 Laminated high moment magnetic films with antiferromagnetic coupling as write pole of perpendicular magnetic recording head 失效
标题翻译：具有反铁磁耦合的叠层高磁矩膜作为垂直磁记录头的写极
公开(公告)号：US20060044680A1
公开(公告)日：2006-03-02
申请号：US10927875
申请日：2004-08-27
申请人： Yinshi Liu , Nian-Xiang Sun , Yunxiao Gao , Yimin Hsu , Tomohiro Okada , Yasuyuki Okada
发明人： Yinshi Liu , Nian-Xiang Sun , Yunxiao Gao , Yimin Hsu , Tomohiro Okada , Yasuyuki Okada
IPC分类号： G11B5/147 , G11B5/23
CPC分类号： G11B5/1278
摘要： A perpendicular write head includes a main pole comprising high moment magnetic layers laminated with both soft magnetic layers and non-magnetic layers for antiferromagnetic coupling (AFC) between the high moment material layers.
摘要翻译：垂直写头包括主极，其包括在高力矩材料层之间层叠有软磁层和用于反铁磁耦合（AFC）的非磁性层的高力矩磁层。

85. 发明授权

US06989964B2 Magnetic head having a pole piece with a double pedestal structure 失效
标题翻译：磁头具有带双底座结构的极片
公开(公告)号：US06989964B2
公开(公告)日：2006-01-24
申请号：US10462535
申请日：2003-06-16
申请人： Yimin Hsu , Gautam Mohan Khera , Yong Shen
发明人： Yimin Hsu , Gautam Mohan Khera , Yong Shen
IPC分类号： G11B5/147
CPC分类号： G11B5/3116
摘要： A magnetic head which includes a pole piece with a double pedestal structure has improved overwrite capabilities and reduced fringing fields. The magnetic head has first and second pole pieces and a gap layer which separates the first and the second pole pieces. The first pole piece includes a first pole piece layer, a bottom pedestal portion formed over the first pole piece layer at an air bearing surface (ABS), and a top pedestal portion formed over the bottom pedestal portion. The top pedestal portion has a thickness that is no more than half of that of the bottom pedestal portion and a length that is no more than half of that of the bottom pedestal portion. Advantageously, a throat height of the magnetic head is reduced from use of the top pedestal portion whereas the mechanical reliability of the first pole piece is increased from use of the bottom pedestal portion.
摘要翻译：包括具有双基座结构的极片的磁头具有改进的覆盖能力和减少的边缘场。磁头具有第一和第二极片以及分隔第一和第二极片的间隙层。第一极靴包括第一极靴层，在空气轴承表面（ABS）上形成在第一极靴层上的底座部分，以及形成在底部底座部分上的顶部底座部分。顶部基座部分的厚度不大于底部底座部分的一半的厚度，并且其长度不超过底部基座部分的一半的长度。有利地，磁头的喉部高度从使用顶部底座部分减小，而第一极靴的机械可靠性从使用底座部分增加。

86. 发明申请

US20060002015A1 Lower saturation field structure for perpendicular AFC pole 失效
标题翻译：垂直AFC极点的饱和场结构较低
公开(公告)号：US20060002015A1
公开(公告)日：2006-01-05
申请号：US10883345
申请日：2004-06-30
申请人： Hardayal Gill , James Freitag , Yimin Hsu , Yinshi Liu
发明人： Hardayal Gill , James Freitag , Yimin Hsu , Yinshi Liu
IPC分类号： G11B5/127
CPC分类号： G11B5/3906 , G11B5/1278 , G11B5/3116
摘要： A magnetic write head for perpendicular magnetic recording having a laminated write pole with improved low saturation field.
摘要翻译：一种用于垂直磁记录的磁写头，具有具有改善的低饱和场的层叠写极。

87. 发明申请

US20050007697A1 Magnetic transducer with pedestal pole piece structure 审中-公开
标题翻译：具有基座极片结构的磁性换能器
公开(公告)号：US20050007697A1
公开(公告)日：2005-01-13
申请号：US10912657
申请日：2004-08-04
申请人： Yimin Hsu , Hugo Santini , Neil Smith , Mason Williams
发明人： Yimin Hsu , Hugo Santini , Neil Smith , Mason Williams
IPC分类号： G11B5/31 , G11B5/147
CPC分类号： G11B5/3116 , G11B5/3113 , G11B5/313
摘要： A magnetic transducer with a write head with one or more coil layers and a pedestal pole piece on P1 is disclosed. In one embodiment the first and second coils and the P1 pedestal are formed on essentially planarized surfaces. The P1 pedestal defines the zero throat height (ZTH) with a 90 degree apex angle which cuts down flux leakage and improves efficiency. The first and second coils are disposed on opposite sides of the gap layer. The write head preferably has upper and lower back flux closure pieces in contact with the pole pieces to complete the back of the yoke. Various combinations of these features allow heads according to the invention to be made with a very short yoke with resulting improved efficiency. In alternative embodiments the coil below the gap layer may be omitted and/or an additional coil above the gap layer may be added.
摘要翻译：公开了一种具有一个或多个线圈层的写头和P1上的基座极片的磁换能器。在一个实施例中，第一和第二线圈和P1基座形成在基本平坦的表面上。 P1基座定义零喉高度（ZTH），90度顶角可以减少漏磁，提高效率。第一和第二线圈设置在间隙层的相对侧上。写头优选地具有与极片接触的上下磁通闭合件，以完成磁轭的后部。这些特征的各种组合使得根据本发明的头部具有非常短的轭，从而提高效率。在替代实施例中，间隙层下面的线圈可以被省略和/或可以添加间隙层上方的附加线圈。

88. 发明授权

US5703485A Method and test structure for determining magnetic domain switching field when fabricating patterned exchange biased magnetoresistive (MR) head 失效
公开(公告)号：US5703485A
公开(公告)日：1997-12-30
申请号：US687903
申请日：1996-07-29
申请人： Yimin Guo , Kochan Ju , Yimin Hsu
发明人： Yimin Guo , Kochan Ju , Yimin Hsu
IPC分类号： G01R33/09 , G11B5/31 , G11B5/39 , G01R33/02 , H01L43/00 , H01F10/02
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3932 , G11B5/3166
摘要： A method for determining through a test structure a longitudinal magnetic exchange field within a patterned exchange biased magnetoresistive (MR) sensor element. To practice the method, there is first provided a substrate. Formed upon the substrate is a patterned magnetoresistive (MR) layer which has a projected length upon the substrate and a projected width upon the substrate. There is formed at a pair of separated locations over the patterned magnetoresistive (MR) layer a pair of patterned conductor lead layers. The pair of patterned conductor lead layers is separated by a track width of the patterned magnetoresistive (MR) layer, where the track width is smaller than the projected width. There is also formed within the track width and upon the patterned magnetoresistive (MR) layer a minimum of one patterned anti-ferromagnetic layer separated from each patterned conductor lead layer within the pair of patterned conductor lead layers by a minimum of one unpinned width of the patterned magnetoresistive (MR) layer. The patterned magnetoresistive (MR) layer also has a minimum of one pinned width of the patterned magnetoresistive (MR) layer beneath the minimum of one patterned anti-ferromagnetic layer. The projected length, the unpinned width and the pinned width of the patterned magnetoresistive (MR) layer are chosen such that the magnetic domains within the unpinned width and the pinned width are coupled such that they switch jointly in an externally applied magnetic field. Finally, there is measured through the patterned conductor lead layers a resistance change within the patterned magnetoresistive (MR) layer when the patterned magnetoresistive (MR) layer is exposed to the externally applied magnetic field. The invention also contemplates the test structure through which the method of the invention is practiced.

89. 发明授权

US08233235B2 PMR writer having a tapered write pole and bump layer and method of fabrication 有权
标题翻译： PMR写入器具有锥形写极点和凸起层及其制造方法
公开(公告)号：US08233235B2
公开(公告)日：2012-07-31
申请号：US12634514
申请日：2009-12-09
申请人： Yingjian Chen , Liubo Hong , Yimin Hsu
发明人： Yingjian Chen , Liubo Hong , Yimin Hsu
IPC分类号： G11B5/147 , G11B5/23
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/3146 , G11B5/3163 , Y10T29/49048
摘要： Methods for fabrication of tapered magnetic poles with a non-magnetic front bump layer. A magnetic pole may have a tapered surface at or near an air bearing surface (ABS), wherein a thickness of the write pole increases in a direction away from the ABS. A non-magnetic front bump layer may be formed on the tapered surface of the magnetic pole and away from the ABS. The front bump layer may increase the separation distance between a shield layer and the magnetic pole near the tapered surface, thereby improving the performance of the write head.
摘要翻译：用非磁性前凸块层制造锥形磁极的方法。磁极可以在空气轴承表面（ABS）处或附近具有锥形表面，其中写入极的厚度在远离ABS的方向上增加。可以在磁极的锥形表面上远离ABS形成非磁性前凸块层。前凸块层可以增加在锥形表面附近的屏蔽层和磁极之间的间隔距离，从而提高写入头的性能。

90. 发明授权

US08139319B2 Perpendicular magnetic recording system with magnetic precession for fast switching of perpendicular write pole magnetization 有权
标题翻译：具有磁性进动的垂直磁记录系统，用于快速切换垂直写磁极磁化
公开(公告)号：US08139319B2
公开(公告)日：2012-03-20
申请号：US12391242
申请日：2009-02-23
申请人： John Thomas Contreras , Yimin Hsu , Manfred Ernst Schabes , Xinzhi Xing
发明人： John Thomas Contreras , Yimin Hsu , Manfred Ernst Schabes , Xinzhi Xing
IPC分类号： G11B5/127
CPC分类号： G11B5/3123 , G11B5/02 , G11B5/1278 , G11B2005/0005
摘要： A perpendicular magnetic recording system has a write head with a main perpendicular write pole connected to a yoke with first and second electrical coils. The first coil is wrapped around the yoke on one side of the main pole, and the second coil is wrapped around the yoke on the other side of the main pole. The first end of each coil is connected to a respective terminal. The second ends of the two coils are connected together and connected to a common terminal. A lead-time circuit is connected between the common terminal and the first end of one of the coils. Immediately after the direction of write current is switched by the write driver, the lead-time circuit causes the current in one of the coils to lead the current in the other coil. The current displacement between the two coils creates a precession of the magnetic flux reversal, thereby reducing the switching time of the write head.
摘要翻译：垂直磁记录系统具有写头，其具有与第一和第二电线圈的轭连接的主垂直写极。第一线圈缠绕在主极的一侧上的轭架上，并且第二线圈缠绕在主极的另一侧上的轭。每个线圈的第一端连接到相应的端子。两个线圈的第二端连接在一起并连接到公共端子。在公共端子和一个线圈的第一端之间连接有引线时间电路。在写入驱动器切换写入电流的方向之后，引线时间电路使一个线圈中的电流导致另一个线圈中的电流。两个线圈之间的电流位移产生了磁通反转的进动，从而减小了写入头的切换时间。

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