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：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：US07337530B1

公开(公告)日：2008-03-04

申请号：US11699777

申请日：2007-01-30

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 method of making a perpendicular magnetic recording head for use in a data storage device includes forming a first pole layer, a second pole layer, a third pole layer, and a shield layer of a write section. The first pole layer, second pole layer, third pole layer, and shield layer are formed without using a chemical mechanical polishing process. The method next includes concurrently trimming the shield layer and a write pole that is defined by the third pole layer to a predetermined track width. In the trimming step, the shield layer is used as a mask for the write pole.

摘要翻译： 制造用于数据存储装置的垂直磁记录头的方法包括形成写入部分的第一极层，第二极层，第三极层和屏蔽层。 在不使用化学机械抛光工艺的情况下形成第一极层，第二极层，第三极层和屏蔽层。 该方法接下来包括同时修整屏蔽层和由第三极层限定到预定磁道宽度的写入极。 在修整步骤中，屏蔽层用作写入极的掩模。

公开(公告)号：US07688546B1

公开(公告)日：2010-03-30

申请号：US11643493

申请日：2006-12-21

申请人： Zhigang Bai ,  Peng Luo ,  Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Adam F. Torabi

发明人： Zhigang Bai ,  Peng Luo ,  Kroum S. Stoev ,  Francis H. Liu ,  Yugang Wang ,  Adam F. Torabi

IPC分类号： G11B5/17

CPC分类号： G11B5/3116 ,  G11B5/1278

摘要： The method and system provide a perpendicular magnetic recording (PMR) head having an air bearing surface (ABS). The PMR head includes first and second poles each having front and back gap regions, a first nonmagnetic insertion layer between the back gap regions, a magnetic pole layer with a front terminating at the ABS, a write gap, shield(s), a second nonmagnetic insertion layer between the second pole back gap region and the shield(s), and coil(s) between the shield(s) and the first pole. The magnetic pole layer terminates between the ABS and the second pole back gap region and has pole angle(s) of at least thirty and not more than fifty degrees. At least part of the magnetic pole layer resides on the second pole. Part of the shield(s) are adjacent to the write gap. Another part of the shield(s) is coupled with the second pole back gap region.

摘要翻译： 该方法和系统提供具有空气轴承表面（ABS）的垂直磁记录（PMR）头。 PMR头包括第一和第二极，每个具有前后间隙区域，在后间隙区域之间的第一非磁性插入层，在ABS处终止于前面的磁极层，写入间隙，屏蔽，第二极 第二极背间隙区域和屏蔽之间的非磁性插入层以及屏蔽和第一极之间的线圈。 磁极层终止在ABS和第二极背间隙区域之间，并且具有至少三十度且不超过五十度的极角。 磁极层的至少一部分位于第二极上。 屏蔽的一部分与写入间隙相邻。 屏蔽的另一部分与第二极背隙区域耦合。

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：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：US08373945B1

公开(公告)日：2013-02-12

申请号：US11789190

申请日：2007-04-23

申请人： Peng Luo ,  Zhigang Bai ,  Yugang Wang ,  Kroum S. Stoev ,  Francis H. Liu

发明人： Peng Luo ,  Zhigang Bai ,  Yugang Wang ,  Kroum S. Stoev ,  Francis H. Liu

IPC分类号： G11B5/31 ,  G11B5/17

CPC分类号： G11B5/1278 ,  G11B5/3123

摘要： A method and system for providing a magnetic transducer are described. The magnetic transducer includes a first pole, a write gap, a second pole, a first coil, and a second coil. The first pole has a front portion on which at least a portion of the write gap resides. The second pole includes a split yoke that includes a first portion and a second portion. At least a portion of the first coil resides between the first portion of the split yoke and the first pole. At least a portion of the second coil resides between the second portion of the split yoke and the first pole.

摘要翻译： 描述了一种用于提供磁换能器的方法和系统。 磁换能器包括第一极，写间隙，第二极，第一线圈和第二线圈。 第一极具有前部，至少部分写入间隙位于该前部。 第二极包括分开轭，其包括第一部分和第二部分。 第一线圈的至少一部分位于分叉轭的第一部分和第一极之间。 第二线圈的至少一部分位于分叉轭的第二部分和第一极之间。

公开(公告)号：US07660080B1

公开(公告)日：2010-02-09

申请号：US10837490

申请日：2004-04-30

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

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

IPC分类号： G11B5/56 ,  G11B21/24

CPC分类号： G11B5/6005 ,  G11B5/3133

摘要： A read/write head for use in a data storage device to control the low dynamic flying height in order to achieve high data recording storage capacity of magnetic hard drives. The read/write head is designed for use in a data storage device that includes a storage medium having a recording surface. The head comprises a pole tip region and an actuator. In turn, the actuator includes an excitation source for generating a magnetic field, and a magnetostrictive plate for expanding in response to the magnetic field, resulting in a protrusion in a section of the pole tip region along a direction towards the recording surface, so that the head flies above the recording surface at a flying height lower than a nominal flying height.

摘要翻译： 一种用于数据存储设备的读/写头，用于控制低动态飞行高度，以实现磁性硬盘驱动器的高数据记录存储容量。 读/写头设计用于包括具有记录表面的存储介质的数据存储设备。 头包括极尖区域和致动器。 继而，致动器包括用于产生磁场的激励源和用于响应于磁场而扩展的磁致伸缩板，导致极尖区域沿着朝向记录表面的方向的一部分突出，使得 头部在低于标称飞行高度的飞行高度处在记录表面上方飞行。

公开(公告)号：US07126790B1

公开(公告)日：2006-10-24

申请号：US10724309

申请日：2003-11-26

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

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

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/17 ,  G11B5/3116 ,  G11B2005/0002 ,  G11B2005/001

摘要： A magnetic head for writing information on perpendicular media has a write pole tip and a return pole tip with a media-facing area at least two orders of magnitude greater than that of the write pole tip, the return pole tip is spaced from a trailing corner of the write pole tip by a submicron nonferromagnetic gap. Magnetic flux emanating from the write pole tip is strongest adjacent the trailing corner and directed at an angle that is not perpendicular to the write pole tip. The angled flux provides increased torque to rotate magnetic dipoles in the adjacent media layer that are oriented substantially perpendicular to the disk surface. The media may have a soft magnetic underlayer that is spaced from the write pole tip by a distance similar to the gap spacing.

摘要翻译： 用于在垂直介质上写入信息的磁头具有写磁极尖端和返回极尖端，其中介质面积比写入磁极尖端大至少两个数量级，返回磁极尖端与后角 的写极尖由亚微米非铁磁隙隙。 从写入极尖发出的磁通量最靠近后角并以不垂直于写入极尖的角度指向。 角度通量提供增加的扭矩以旋转基本上垂直于盘表面定向的相邻介质层中的偶极子。 介质可以具有与写磁极尖端间隔一段类似于间隙间隔的软磁性底层。

公开(公告)号：US07126788B1

公开(公告)日：2006-10-24

申请号：US10724385

申请日：2003-11-26

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

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

IPC分类号： G11B5/17 ,  G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/17 ,  G11B2005/0002

摘要： A magnetic head for writing information on perpendicular media has a write pole tip, a return pole tip and a deflection pole tip is disclosed. The return pole tip has a media-facing area at least two orders of magnitude greater than that of the write pole tip, and the deflection pole tip is spaced from a trailing corner of the write pole tip by a submicron nonferromagnetic gap. Magnetic flux emanating from the write pole tip is strongest adjacent the trailing corner and directed at an angle that is not perpendicular to the write pole tip. The angled flux provides increased torque to rotate magnetic dipoles in the adjacent media layer that are oriented substantially perpendicular to the disk surface. The media may have a soft magnetic underlayer that is spaced from the write pole tip by a distance similar to the gap spacing.

摘要翻译： 用于在垂直介质上写入信息的磁头具有写极端，回极极端和偏转极尖。 返回极端部具有比写入磁极尖端大至少两个数量级的面向介质的区域，并且偏转极尖端与写入磁极尖端的后角部分间隔有亚微米非铁磁隙。 从写入极尖发出的磁通量最靠近后角并以不垂直于写入极尖的角度指向。 角度通量提供增加的扭矩以旋转基本上垂直于盘表面定向的相邻介质层中的偶极子。 介质可以具有与写磁极尖端间隔一段类似于间隙间隔的软磁性底层。