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1. 发明授权

US06493183B1 Thermally-assisted magnetic recording system with head having resistive heater in write gap 有权
标题翻译：带磁头的热辅助磁记录系统具有写入间隙中的电阻加热器
公开(公告)号：US06493183B1
公开(公告)日：2002-12-10
申请号：US09608848
申请日：2000-06-29
申请人： Prakash Kasiraj , Neil Leslie Robertson , Hemantha Kumar Wickramasinghe
发明人： Prakash Kasiraj , Neil Leslie Robertson , Hemantha Kumar Wickramasinghe
IPC分类号： G11B5147
CPC分类号： G11B5/3903 , G11B5/127 , G11B13/045 , G11B2005/0005 , G11B2005/0021
摘要： A thermally-assisted magnetic recording disk drive records data by heating a small region of the magnetic layer on the disk to near or above its Curie temperature while a write field is applied by a thin film inductive write head. The thin film inductive write head includes an electrically resistive heater located in the write gap between the pole tips of the write head. The resistive heater is sandwiched between first and second spacer layers that are located between the pole tips of the write head. In a current-perpendicular-to-the plane (CPP) embodiment, the spacer layers are electrically conductive and the pole tips serve as the electrical leads to provide electrical current in a direction generally perpendicular to the layer of resistive heater material. In a current-in-the plane (CIP) embodiment, the spacer layers are formed of insulating material and electrical leads are formed as portions of a film between the spacer layers and in contact with each side of the resistive heater. The width of the resistive heater is less than the width of the pole tips. Thus since only the region of the magnetic layer on the disk that is heated by the resistive heater can be written by the pole tips of the write head, the data track width on the disk is defined by the width of the resistive heater, not by the geometry of write head pole tips.
摘要翻译：热辅助磁记录磁盘驱动器通过在薄膜感应写头施加写入场的同时将盘上的磁性层的小区域加热到靠近或高于其居里温度来记录数据。薄膜感应写头包括位于写入头的极尖之间的写入间隙中的电阻加热器。电阻加热器被夹在位于写入头的极尖之间的第一和第二间隔层之间。在电流垂直于平面（CPP）实施例中，间隔层是导电的，并且极尖用作电引线以在大致垂直于电阻加热器材料层的方向上提供电流。在电流平面（CIP）实施例中，间隔层由绝缘材料形成，并且电引线形成为间隔层之间的膜的一部分并且与电阻加热器的每一侧接触。电阻加热器的宽度小于极尖的宽度。因此，由于只有由电阻加热器加热的磁盘上的磁性层的区域可以由写入头的极尖写入，所以盘上的数据磁道宽度由电阻加热器的宽度定义，而不是由写磁头尖端的几何形状。

2. 发明授权

US07262936B2 Heating device and magnetic recording head for thermally-assisted recording 失效
标题翻译：加热装置和用于热辅助记录的磁记录头
公开(公告)号：US07262936B2
公开(公告)日：2007-08-28
申请号：US10791002
申请日：2004-03-01
申请人： Hendrik F. Hamann , Prakash Kasiraj , Jeffrey S. Lille , Yves C. Martin , Chie Ching Poon , Neil Leslie Robertson , Jan-Ulrich Thiele , Hemantha Kumar Wickramasinghe
发明人： Hendrik F. Hamann , Prakash Kasiraj , Jeffrey S. Lille , Yves C. Martin , Chie Ching Poon , Neil Leslie Robertson , Jan-Ulrich Thiele , Hemantha Kumar Wickramasinghe
IPC分类号： G11B5/00
CPC分类号： G11B5/127 , G11B2005/0005 , G11B2005/0021
摘要： A heating device for a magnetic recording head includes first and second separating layers, the first separating layer having preferably a higher or equal thermal resistance than the first separating layer, and a heater formed between the first and second separating layers. A magnetic recording head for recording on magnetic medium includes a heating device which generates a heat spot on the magnetic medium which is larger than a magnetic track width, and/or heats a portion of the magnetic recording head which is on a leading edge side of a write gap in the magnetic recording head.
摘要翻译：用于磁记录头的加热装置包括第一和第二分离层，第一分离层优选地具有比第一分离层更高或相等的热阻，以及形成在第一和第二分离层之间的加热器。用于在磁介质上记录的磁记录头包括加热装置，该加热装置在磁介质上产生大于磁道宽度的热点，和/或加热位于磁介质的前缘侧的磁记录头的一部分磁记录头中的写入间隙。

3. 发明授权

US07490212B2 System and method for writing data to dedicated bands of a hard disk drive 失效
标题翻译：将数据写入硬盘驱动器的专用频带的系统和方法
公开(公告)号：US07490212B2
公开(公告)日：2009-02-10
申请号：US10674093
申请日：2003-09-29
申请人： Prakash Kasiraj , Richard M. H. New , Jorge Campello de Souza , Mason Lamar Williams
发明人： Prakash Kasiraj , Richard M. H. New , Jorge Campello de Souza , Mason Lamar Williams
IPC分类号： G06F12/00
CPC分类号： G11B27/11 , G11B5/012 , G11B20/1217 , G11B2020/1238 , G11B2020/1298 , G11B2220/2516 , G11B2220/65
摘要： Data is written to a hard disk drive using shingled writing principles, i.e., each data track is partially overwritten when an immediately contiguous data track is written. Two or more contiguous data tracks establish a band, and a band may store data from one and only one file, such as an AV file.
摘要翻译：数据被写入硬盘驱动器，使用着色的写入原理，即当紧紧连续的数据磁道被写入时，每个数据磁道被部分重写。两个或更多个连续的数据轨道建立一个频带，并且频带可以存储来自一个文件（例如AV文件）的数据。

4. 发明授权

US07199986B2 Magnetoresistive sensor with decoupled hard bias multilayers 有权
标题翻译：具有解耦硬偏置多层的磁阻传感器
公开(公告)号：US07199986B2
公开(公告)日：2007-04-03
申请号：US10782301
申请日：2004-02-18
申请人： Marie-Claire Cyrille , Meng Ding , Kuok-San Ho , Prakash Kasiraj , Ernesto Marinero , James Lamar Nix , Brian York
发明人： Marie-Claire Cyrille , Meng Ding , Kuok-San Ho , Prakash Kasiraj , Ernesto Marinero , James Lamar Nix , Brian York
IPC分类号： G11B5/33
CPC分类号： G11B5/3932
摘要： A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities, such that the biases provided by the bias layers to the free layer are independently adjustable. The grain structures of the two bias layers may be substantially decorrelated by the decoupling layer.
摘要翻译：提供了一种磁传感器，其具有由解耦层隔开的两个偏置层，以消除偏置层之间的交换耦合。两个偏置层可以具有不同的矫顽力，使得由偏置层提供给自由层的偏压是独立可调的。两个偏置层的晶粒结构可以通过去耦层基本上去相关。

5. 发明申请

US20060064866A1 Method for reducing damage to sliders during lapping 失效
标题翻译：在研磨过程中减少滑块损坏的方法
公开(公告)号：US20060064866A1
公开(公告)日：2006-03-30
申请号：US10957098
申请日：2004-09-30
申请人： Marie-Claire Cyrille , Prakash Kasiraj , Huey-Ming Tzeng
发明人： Marie-Claire Cyrille , Prakash Kasiraj , Huey-Ming Tzeng
IPC分类号： G11B5/33 , G11B5/187 , G11B5/127 , H04R31/00
CPC分类号： G11B5/3169 , G11B5/332 , G11B5/3932 , Y10T29/49041 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A process is described for fabricating sliders with reduced lapping damage to the hard-bias materials. The stack of layers for the magnetic sensor is deposited on a wafer and patterned into an initial shape. The hard-bias structures are fabricated at the side of the magnetic sensor as in the prior art. In each of the two described embodiments of the invention, the hard-bias material below the ABS is reduced or removed and replaced with a fill material such as alumina. A first embodiment reduces the hard-bias material below the ABS by forming an extended lapping gap along the ABS in both the sensor and hard-bias material. A second embodiment forms a photoresist mask over the sensor and the portion of the hard-bias/lead structures above the ABS and the exposed hard-bias/lead material below the ABS is thinned or completely removed by milling.
摘要翻译：描述了一种用于制造滑块的方法，减少了对硬偏置材料的研磨损伤。用于磁传感器的层堆叠沉积在晶片上并图案化成初始形状。如现有技术那样，在磁性传感器侧制造硬偏压结构。在本发明的两个所描述的实施例的每一个中，ABS下面的硬偏压材料被减少或移除，并用诸如氧化铝的填充材料代替。第一实施例通过在传感器和硬偏压材料中沿着ABS形成延伸的研磨间隙来减少ABS之下的硬偏置材料。第二实施例在传感器上形成光致抗蚀剂掩模，并且在ABS之上的硬偏置/引线结构的部分以及ABS下方的暴露的硬偏置/引线材料通过研磨被薄化或完全去除。

6. 发明申请

US20050070206A1 Slider fabrication system for sliders with integrated electrical lapping guides 失效
标题翻译：滑块制造系统，用于带集成电动研磨导轨的滑块
公开(公告)号：US20050070206A1
公开(公告)日：2005-03-31
申请号：US10675043
申请日：2003-09-29
申请人： Prakash Kasiraj , Quang Le , Huey Tzeng , Xiao Wu
发明人： Prakash Kasiraj , Quang Le , Huey Tzeng , Xiao Wu
IPC分类号： B24B37/00 , B24B49/16 , G11B5/60 , B24B49/00
CPC分类号： B24B49/16 , B24B37/00 , G11B5/3169
摘要： A slider is described with a resistive electro-lapping guide (ELG), which is aligned with a structure in the write head such as the throat height or trailing shield thickness and extends from the lapping region through the ABS and is connected to pads on the surface of the slider. In a second embodiment the ELG is disposed entirely in the section of the slider which will be removed by lapping. Another embodiment of the invention is a system for single slider lapping which simultaneously monitors the resistance of the read sensor or a read head ELG and at least one ELG that is aligned with a structure in the write head. A controller uses the resistance information to implement an algorithm which decides when lapping should be terminated.
摘要翻译：使用电阻式电动研磨引导件（ELG）描述滑块，其与写入头部中的结构对准，例如喉部高度或尾部屏蔽层厚度，并从研磨区域穿过ABS延伸并连接到滑块的表面。在第二实施例中，ELG完全设置在滑块的将通过研磨去除的部分中。本发明的另一个实施例是用于单个滑块研磨的系统，其同时监视读取传感器或读取头ELG和与写入头中的结构对准的至少一个ELG的电阻。控制器使用电阻信息来实现一种算法，该算法决定何时结束研磨。

7. 发明授权

US07360296B2 Method for reducing damage to sliders during lapping 失效
标题翻译：在研磨过程中减少滑块损坏的方法
公开(公告)号：US07360296B2
公开(公告)日：2008-04-22
申请号：US10957098
申请日：2004-09-30
申请人： Marie-Claire Cyrille , Prakash Kasiraj , Huey-Ming Tzeng
发明人： Marie-Claire Cyrille , Prakash Kasiraj , Huey-Ming Tzeng
IPC分类号： G11B5/187 , B24B1/00
CPC分类号： G11B5/3169 , G11B5/332 , G11B5/3932 , Y10T29/49041 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A process is described for fabricating sliders with reduced lapping damage to the hard-bias materials. The stack of layers for the magnetic sensor is deposited on a wafer and patterned into an initial shape. The hard-bias structures are fabricated at the side of the magnetic sensor as in the prior art. In each of the two described embodiments of the invention, the hard-bias material below the ABS is reduced or removed and replaced with a fill material such as alumina. A first embodiment reduces the hard-bias material below the ABS by forming an extended lapping gap along the ABS in both the sensor and hard-bias material. A second embodiment forms a photoresist mask over the sensor and the portion of the hard-bias/lead structures above the ABS and the exposed hard-bias/lead material below the ABS is thinned or completely removed by milling.
摘要翻译：描述了一种用于制造滑块的方法，减少了对硬偏置材料的研磨损伤。用于磁传感器的层堆叠沉积在晶片上并图案化成初始形状。如现有技术那样，在磁性传感器侧制造硬偏压结构。在本发明的两个所描述的实施例的每一个中，ABS下面的硬偏压材料被减少或移除，并用诸如氧化铝的填充材料代替。第一实施例通过在传感器和硬偏压材料中沿着ABS形成延伸的研磨间隙来减少ABS之下的硬偏置材料。第二实施例在传感器上形成光致抗蚀剂掩模，并且在ABS之上的硬偏置/引线结构的部分以及ABS下方的暴露的硬偏置/引线材料通过研磨被薄化或完全去除。

8. 发明授权

US07072156B2 Method for biasing magnetoresistive sensor with decoupled hard bias multilayers 失效
标题翻译：用去耦硬偏置多层膜偏置磁阻传感器的方法
公开(公告)号：US07072156B2
公开(公告)日：2006-07-04
申请号：US10782628
申请日：2004-02-18
申请人： Marie-Claire Cyrille , Meng Ding , Kuok San Ho , Prakash Kasiraj , Ernesto Marinero , James Lamar Nix
发明人： Marie-Claire Cyrille , Meng Ding , Kuok San Ho , Prakash Kasiraj , Ernesto Marinero , James Lamar Nix
IPC分类号： G11B5/39
CPC分类号： G11B5/3903
摘要： A magnetic sensor is provided, having two bias layers separated by a decoupling layer to eliminate exchange coupling between the bias layers. The two bias layers may have differing coercivities, such that the biases provided by the bias layers to the free layer are independently adjustable. The grain structures of the two bias layers may be substantially decorrelated by the decoupling layer.
摘要翻译：提供了一种磁传感器，其具有由解耦层隔开的两个偏置层，以消除偏置层之间的交换耦合。两个偏置层可以具有不同的矫顽力，使得由偏置层提供给自由层的偏压是独立可调的。两个偏置层的晶粒结构可以通过去耦层基本上去相关。

9. 发明授权

US5293116A Method and apparatus for measuring nonlinearity in thin film heads during their fabrication 失效
标题翻译：在制造薄膜头期间测量非线性的方法和装置
公开(公告)号：US5293116A
公开(公告)日：1994-03-08
申请号：US882246
申请日：1992-05-08
申请人： Donald E. Horne , Prakash Kasiraj , Fior D. Sargent
发明人： Donald E. Horne , Prakash Kasiraj , Fior D. Sargent
IPC分类号： G01R31/00 , G01R33/12 , G11B5/31 , G11B5/455 , G11B3/90 , G11B27/36 , G11C7/06
CPC分类号： G01R33/1207 , G11B5/3166 , G11B5/455
摘要： At the wafer level, a conventional write signal is applied to a pre-selected thin film head. Thereafter, first and second constant amplitude, differing frequency sine wave signals are applied to the head along with a DC bias signal whose magnitude is varied. The level of frequency mixing in the output signal of the head is detected at each level of magnitude of the DC bias signal and this data is utilized in predicting the level of noise in the read-back signal of the thin film head during normal read and write operations in connection with a rotating storage disk.
摘要翻译：在晶片级，常规的写入信号被施加到预先选择的薄膜头。此后，第一和第二恒定幅度，不同频率的正弦波信号与其幅度变化的DC偏置信号一起施加到头部。在直流偏置信号的每个电平级别检测头部的输出信号中的混频电平，并且该数据用于在正常读取期间预测薄膜磁头的回读信号中的噪声电平，并且与旋转存储盘相关的写入操作。

10. 发明授权

US08786969B2 Shingled recording systems using multiple pass write, single pass read architecture 有权
标题翻译：嵌入式录音系统采用多通写，单通读结构
公开(公告)号：US08786969B2
公开(公告)日：2014-07-22
申请号：US13251031
申请日：2011-09-30
申请人： Prakash Kasiraj , Thomas R. Albrecht
发明人： Prakash Kasiraj , Thomas R. Albrecht
IPC分类号： G11B20/10
CPC分类号： G11B5/012 , G11B5/746
摘要： In one embodiment, a magnetic data storage system includes a bit patterned magnetic medium, wherein centers of bits in adjacent data tracks do not lie on a common line in a cross-track direction, a magnetic head having a writer element having a width greater than a width of a data track in a track width direction adapted for writing data successively to at least two adjacent data tracks of the magnetic medium, and a reader element having a width larger than the width of a data track in the track width direction adapted for reading data concurrently from the at least two adjacent data tracks of the magnetic medium in a single pass, a drive mechanism for passing the magnetic medium over the magnetic head, and a controller electrically coupled to the magnetic head for controlling operation of the magnetic head.
摘要翻译：在一个实施例中，磁数据存储系统包括位图形磁介质，其中相邻数据磁道中的位中心不位于交叉磁道方向上的公共线上，磁头具有写入器元件，宽度大于适于将数据连续地写入磁介质的至少两个相邻数据轨道的轨道宽度方向上的数据轨道的宽度，以及宽度大于轨道宽度方向上的数据轨道的宽度的读取器元件，在单次通过中从磁介质的至少两个相邻数据轨道同时读取数据，用于使磁介质通过磁头的驱动机构，以及电耦合到磁头的控制器，用于控制磁头的操作。

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