公开(公告)号：US07310204B1

公开(公告)日：2007-12-18

申请号：US10741856

申请日：2003-12-19

申请人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Yingjian Chen

发明人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Yingjian Chen

IPC分类号： G11B5/187

CPC分类号： G11B5/1871 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3967

摘要： A magnetic head for writing information on a relatively-moving medium has a pair of substantially flat soft magnetic pole layers separated by a pair of coil layers. A soft magnetic pedestal adjoins the leading pole layer adjacent to a medium-facing surface and is spaced from the second pole layer by a nanoscale nonferromagnetic gap, the pedestal having a layer of high magnetic saturation material that defines a throat height and extends beyond the throat height. A second high magnetic saturation material adjoins the trailing pole layer and either terminates at the throat height to form a second pedestal or extends to reach a magnetic backgap structure that magnetically couples the pole layers. The MR sensor can be located closer than the write transducer to the trailing end of the head to reduce separation between the read transducer and the write transducer.

摘要翻译： 用于在相对移动的介质上写入信息的磁头具有由一对线圈层隔开的一对基本平坦的软磁极层。 软磁性基座毗邻与中间面向表面相邻的引导极层，并且与第二极层间隔一纳米尺度的非铁磁隙，该基座具有一层高磁饱和度材料，其限定了喉部高度并延伸到喉部 高度。 第二高磁饱和材料邻接后极层并且终止于喉部高度以形成第二基座或延伸以到达磁耦合极层的磁性后隙结构。 MR传感器可以位于比写入传感器更靠近头部尾端的位置，以减少读取传感器与写入传感器之间的分离。

公开(公告)号：US07248433B1

公开(公告)日：2007-07-24

申请号：US10770992

申请日：2004-02-02

申请人： Kroum S Stoev ,  Francis H Liu ,  Yugang Wang

发明人： Kroum S Stoev ,  Francis H Liu ,  Yugang Wang

IPC分类号： G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/17 ,  G11B5/3146

摘要： A magnetic head is disclosed that has first and second substantially flat soft magnetic pole layers that are magnetically coupled together in a backgap region that is removed from the medium-facing surface; a soft magnetic pedestal having a leading edge and a trailing edge, the trailing edge adjoining the second pole layer adjacent to the medium-facing surface, the leading edge defining a throat area that is spaced from the first pole layer by a submicron nonferromagnetic gap and defining an apex area that is spaced from the first pole layer by a greater separation than the gap, the throat area meeting the apex area at a throat height; and a plurality of substantially parallel, electrically conductive sections disposed between the first and second pole layers, the conductive sections disposed in a single layer that is aligned along a plane that intersects the pedestal and the backgap region.

摘要翻译： 公开了一种磁头，其具有第一和第二基本上平坦的软磁极层，其在从介质面向表面移除的后隙区域中磁耦合在一起; 具有前缘和后缘的软磁性基座，所述后缘邻近所述第二极层与所述介质相对表面相邻，所述前缘限定与所述第一极层间隔开亚微米非铁磁间隙的喉部区域，以及 限定与所述第一极层间隔开比所述间隙更大的间隔的顶点区域，所述喉部区域在喉部高度处满足所述顶点区域; 以及设置在所述第一和第二极层之间的多个基本上平行的导电部分，所述导电部分设置在沿着与所述基座和所述后隙区域相交的平面对齐的单个层中。

公开(公告)号：US07193815B1

公开(公告)日：2007-03-20

申请号：US10819533

申请日：2004-04-06

申请人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang

发明人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang

IPC分类号： G11B5/147

CPC分类号： G11B5/313 ,  G11B5/1278 ,  G11B5/3116 ,  G11B2005/0029 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/4905

摘要： A read/write head for use in a perpendicular magnetic recording head in a data storage system. The read/write head includes a write section that is comprised of a first pole layer, a second pole layer, a third pole layer, and a shield layer. The third pole layer defines a write pole tip, and the third pole layer and the shield layer are separated from each other to define a write gap therebetween. At least part of the shield layer has a generally uniform width, and wherein the write pole tip defines a track width that is substantially equal to the uniform width of the shield layer. According to one embodiment the entire shield layer has a generally uniform width that is substantially equal to the track width. According to another embodiment, the shield layer includes a lower section and an upper section, wherein the lower section has a generally uniform width along its entire length, and wherein the upper section is wider than the lower section.

摘要翻译： 用于数据存储系统中的垂直磁记录头的读/写头。 读/写头包括由第一极层，第二极层，第三极层和屏蔽层组成的写入部分。 第三极层限定写极尖，并且第三极层和屏蔽层彼此分离以在它们之间限定写入间隙。 屏蔽层的至少一部分具有大致均匀的宽度，并且其中写极端部限定基本上等于屏蔽层的均匀宽度的轨道宽度。 根据一个实施例，整个屏蔽层具有基本上等于轨道宽度的大致均匀的宽度。 根据另一实施例，屏蔽层包括下部和上部，其中下部沿其整个长度具有大致均匀的宽度，并且其中上部比下部宽。

公开(公告)号：US6073338A

公开(公告)日：2000-06-13

申请号：US912836

申请日：1997-08-19

申请人： Francis H. Liu ,  Hua-Ching Tong ,  Samuel W. Yuan

发明人： Francis H. Liu ,  Hua-Ching Tong ,  Samuel W. Yuan

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/127 ,  G11B5/23

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3967 ,  G11B2005/3996 ,  G11B5/313 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044

摘要： A method of manufacturing a thin film magnetic head which employs pole tips members which are coplanar in a plane across the write gap to produce a written track whose width is determined by the thickness of the pole tip members. The coplanar write structure may be-combined with a multilayer read sensor disposed in the write gap to produce a narrow trackwidth thin film magnetic head having both write and read capabilities.

摘要翻译： 一种制造薄膜磁头的方法，其采用在写入间隙中的平面内共面的极尖部件，以产生其宽度由极尖部件的厚度确定的写入轨迹。 共面写入结构可以与设置在写入间隙中的多层读取传感器组合以产生具有写入和读取能力两者的窄轨道宽度薄膜磁头。

公开(公告)号：US08514506B1

公开(公告)日：2013-08-20

申请号：US13371252

申请日：2012-02-10

申请人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

发明人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B5/3954 ,  G11B5/012 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10074 ,  G11B20/10175 ,  G11B20/10222 ,  G11B20/10231 ,  G11B20/10277 ,  G11B20/10305 ,  G11B20/10314 ,  G11B20/10379 ,  G11B20/1258 ,  G11B2220/2516

摘要： A disk drive is disclosed comprising a disk having a plurality of data tracks, and a head actuated over the disk, the head comprising a first read element and a second read element. A data track is read to generate a first read signal emanating from the first read element and a second read signal emanating from the second read element. The first read signal is delayed in continuous time relative to the second read signal to generate a delayed read signal, and the second read signal is combined with the delayed read signal to generate a combined read signal. An estimated data sequence is detected from the combined read signal.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个数据磁道的磁盘，以及在盘上驱动的磁头，磁头包括第一读取元件和第二读取元件。 读取数据磁道以产生从第一读取元件发出的第一读取信号和从第二读取元件发出的第二读取信号。 第一读取信号相对于第二读取信号以连续时间延迟，以产生延迟的读取信号，并且将第二读取信号与延迟的读取信号组合以产生组合的读取信号。 从组合的读取信号中检测估计的数据序列。

公开(公告)号：US08385157B1

公开(公告)日：2013-02-26

申请号：US12570975

申请日：2009-09-30

申请人： Eric J. Champion ,  Francis H. Liu ,  Adam F. Torabi

发明人： Eric J. Champion ,  Francis H. Liu ,  Adam F. Torabi

IPC分类号： G11B11/00

CPC分类号： G11B5/012 ,  G11B2005/0021

摘要： A method and system for writing data to a media utilizing an energy assisted magnetic recording (EAMR) head are described. The EAMR head includes at least one laser and at least one EAMR transducer. The laser(s) provide energy. The EAMR transducer(s) are coupled with the laser. The EAMR transducer(s) are configured to direct the energy to spot(s) on the media and to write a plurality of tracks of data in a block. The method and system include writing a track of the plurality of tracks on the media within the spot(s) using the EAMR transducer and stepping a track pitch along a particular radial direction on the media. The method and system also include repeating the writing and stepping steps until the plurality of tracks for the block is written.

摘要翻译： 描述了使用能量辅助磁记录（EAMR）头将数据写入介质的方法和系统。 EAMR头包括至少一个激光器和至少一个EAMR传感器。 激光器提供能量。 EAMR传感器与激光器耦合。 EAMR传感器被配置为将能量引导到介质上的点，并将多个数据轨迹写入块中。 该方法和系统包括使用EAMR传感器在所述位置内的介质上写入多个轨道的轨道，并且沿着介质上的特定径向方向对轨道间距进行步进。 方法和系统还包括重复写入和步进步骤，直到写入块的多个轨道为止。

公开(公告)号：US07443632B1

公开(公告)日：2008-10-28

申请号：US11780110

申请日：2007-07-19

申请人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang

发明人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang

IPC分类号： G11B5/127 ,  G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/17 ,  G11B5/3146

摘要： A magnetic head is disclosed that has first and second substantially flat soft magnetic pole layers that are magnetically coupled together in a backgap region that is removed from the medium-facing surface; a soft magnetic pedestal having a leading edge and a trailing edge, the trailing edge adjoining the second pole layer adjacent to the medium-facing surface, the leading edge defining a throat area that is spaced from the first pole layer by a submicron nonferromagnetic gap and defining an apex area that is spaced from the first pole layer by a greater separation than the gap, the throat area meeting the apex area at a throat height; and a plurality of substantially parallel, electrically conductive sections disposed between the first and second pole layers, the conductive sections disposed in a single layer that is aligned along a plane that intersects the pedestal and the backgap region.

摘要翻译： 公开了一种磁头，其具有第一和第二基本上平坦的软磁极层，其在从介质面向表面移除的后隙区域中磁耦合在一起; 具有前缘和后缘的软磁性基座，所述后缘邻近所述第二极层与所述介质相对表面相邻，所述前缘限定与所述第一极层间隔开亚微米非铁磁间隙的喉部区域，以及 限定与所述第一极层间隔开比所述间隙更大的间隔的顶点区域，所述喉部区域在喉部高度处满足所述顶点区域; 以及设置在所述第一和第二极层之间的多个基本上平行的导电部分，所述导电部分设置在沿着与所述基座和所述后隙区域相交的平面对齐的单个层中。

公开(公告)号：US07375926B1

公开(公告)日：2008-05-20

申请号：US11779785

申请日：2007-07-18

申请人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Yingjian Chen

发明人： Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Yingjian Chen

IPC分类号： G11B5/187

CPC分类号： G11B5/1871 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3967

摘要： A magnetic head for writing information on a relatively-moving medium includes a first substantially flat soft magnetic pole layer and a second substantially flat pole layer with at least one coil layer between them. The pole layers are magnetically coupled in a core region and spaced by more than one micron from one other. A soft magnetic pedestal adjoins the first pole layer adjacent to a medium-facing surface of the head, and a first high magnetic saturation layer adjoins the pedestal. A second high magnetic saturation layer adjoins the second pole layer. The first high magnetic saturation layer has a first throat height and the second high magnetic saturation layer extends from the medium-facing surface only to a second throat height. The first and second throat heights are within about one and one-half microns from the medium-facing surface and are essentially equal.

摘要翻译： 用于在相对移动的介质上写入信息的磁头包括第一基本平坦的软磁极层和在它们之间具有至少一个线圈层的第二基本平坦的极性层。 磁极层磁芯耦合在磁芯区域并彼此间隔超过一微米。 软磁座与第一磁极层相邻，与磁头的介质表面相邻，第一高磁饱和层邻接基座。 第二高磁饱和层邻接第二极层。 第一高磁饱和层具有第一喉部高度，而第二高磁饱和层从介质中的表面延伸到第二喉部高度。 第一和第二喉部高度距离面向介质的表面大约一个半微米，并且基本相等。

公开(公告)号：US07283327B1

公开(公告)日：2007-10-16

申请号：US11451770

申请日：2006-06-13

申请人： Francis H. Liu ,  Kroum S. Stoev ,  Mohamad T. Krounbi

发明人： Francis H. Liu ,  Kroum S. Stoev ,  Mohamad T. Krounbi

IPC分类号： G11B5/17 ,  G11B5/56 ,  G11B21/02

CPC分类号： G11B5/60 ,  G11B5/6064

摘要： A magnetic write head includes a magnetic yoke having a first pole and a second pole. The first pole and the second pole each terminate at an air bearing surface. The first pole is magnetically coupled to the second pole in a backgap region. The magnetic write head further includes a electrically conductive write coil magnetically coupled to the magnetic yoke. The magnetic write head further includes a resistive heater coil having a first coil turn and a second coil turn. The heater coil is electrically isolated from the write coil. At least a portion of the first coil turn is between the first pole and the second pole and between the air bearing surface and the backgap region. At least a portion of the second coil turn is between the first pole and the second pole and between the air bearing surface and the backgap region. The portion of the first coil turn overlaps the portion of the second coil turn.

摘要翻译： 磁写头包括具有第一极和第二极的磁轭。 第一极和第二极各自终止于空气轴承表面。 第一极在后隙区域磁耦合到第二极。 磁写头还包括磁耦合到磁轭的导电写入线圈。 磁写头还包括具有第一线圈匝和第二线圈匝的电阻加热器线圈。 加热器线圈与写入线圈电隔离。 第一线圈匝的至少一部分在第一极和第二极之间以及空气支承表面和后隙区之间。 第二线圈匝的至少一部分在第一极和第二极之间以及空气支承表面和后隙区之间。 第一线圈圈的部分与第二线圈匝的部分重叠。

公开(公告)号：US07239478B1

公开(公告)日：2007-07-03

申请号：US10769409

申请日：2004-01-31

申请人： Kyusik Sin ,  Yinshi Liu ,  Benjamin Chen ,  Francis H. Liu

发明人： Kyusik Sin ,  Yinshi Liu ,  Benjamin Chen ,  Francis H. Liu

IPC分类号： G11B5/127

CPC分类号： G11B5/112 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163

摘要： A write element for perpendicular recording in a data storage system is fabricated to maintain the thickness of a side shield at both edges of a pole P3, and to form the pole P3 in a trapezoidal shape. Forming a side shield around the pole P3 removes stray fields, creating a quiet, noise-free write element and preventing side erasure. The fabrication method utilizes a magnetic buffer layer to protect a shield gap during trim of the pole P3, and thus to provide the shield gap with a uniform thickness. The magnetic buffer layer also protects the shield gap and pole P3 when the top hard mask is removed. Consequently, the write field is made uniform across the track width. The fabrication method uses a metal in the shield gap to improve the pole geometry after pole trim and to provide a uniform edge to the pole P3.

摘要翻译： 制造用于在数据存储系统中进行垂直记录的写入元件，以将侧屏蔽件的厚度保持在极点P 3的两个边缘处，并且形成梯形形状的极点3。 在P 3周围形成一个侧面屏蔽可去除杂散场，创建一个安静，无噪音的写入元件，并防止侧面擦除。 该制造方法利用磁性缓冲层来保护极P 3的修整期间的屏蔽间隙，从而提供具有均匀厚度的屏蔽间隙。 当去除顶部硬掩模时，磁缓冲层还保护屏蔽间隙和极点P 3。 因此，写入磁道在磁道宽度上是均匀的。 制造方法使用屏蔽间隙中的金属来改善极修整之后的极几何形状，并且向极P 3提供均匀的边缘。