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1. 发明申请

US20130308228A1 READ SENSOR HAVING A STRUCTURE FOR REDUCING MAGNETIC COUPLING BETWEEN A MAGNETIC BIAS LAYER AND AN UPPER MAGNETIC SHIELD 有权
标题翻译：读取传感器具有减少磁性偏移层与上位磁屏蔽之间的磁耦合的结构
公开(公告)号：US20130308228A1
公开(公告)日：2013-11-21
申请号：US13472326
申请日：2012-05-15
申请人： Hideki Mashima , Nobuo Yoshida , Takahiro Ibusuki , Tsutomu Yasuda
发明人： Hideki Mashima , Nobuo Yoshida , Takahiro Ibusuki , Tsutomu Yasuda
IPC分类号： G11B5/39 , B23P17/00
CPC分类号： G11B5/3932 , B82Y10/00 , G11B5/3909 , G11B2005/3996
摘要： A magnetic sensor having reduced read gap thickness, reduced signal noise and improved signal to noise ratio. The sensor includes a sensor stack and hard bias structures formed at either side of the sensor stack for biasing the free layer of the sensor. A protective layer is formed over a portion of the hard bias structure, however a portion of the hard bias structure extends upward toward the upper shield and is disposed between the protective layer and the sensor stack as a result of the process used to form the magnetic bias structure. This portion of the hard bias structure that extends toward the upper shield has a reduced magnetization relative to the rest of the hard bias structure so that it will not magnetically couple with the upper shield.
摘要翻译：具有减小的读取间隙厚度，降低的信号噪声和改善的信噪比的磁传感器。传感器包括传感器堆叠和形成在传感器堆叠的任一侧的硬偏压结构，用于偏置传感器的自由层。在硬偏压结构的一部分上形成保护层，然而硬偏压结构的一部分向上朝向上屏蔽延伸，并且由于用于形成磁性的过程而被设置在保护层和传感器堆之间偏倚结构。朝向上屏蔽延伸的硬偏压结构的该部分相对于硬偏压结构的其余部分具有减小的磁化，使得其不会与上屏蔽件磁耦合。

2. 发明申请

US20120187079A1 METHOD FOR MANUFACTURING A MAGNETIC SENSOR HAVING A FLAT UPPER SHIELD 审中-公开
标题翻译：用于制造具有平坦上层屏蔽的磁传感器的方法
公开(公告)号：US20120187079A1
公开(公告)日：2012-07-26
申请号：US13010908
申请日：2011-01-21
申请人： Hideki Mashima , Nobuo Yoshida
发明人： Hideki Mashima , Nobuo Yoshida
IPC分类号： G11B5/127 , C23F1/00
CPC分类号： G11B5/398 , G01R33/098 , G11B5/3163 , G11B5/3912 , G11B5/3932
摘要： A method for manufacturing a magnetic sensor that has a flat upper shield. A sensor stack is formed with a sensor capping layer at its top and a first CMP stop layer over the sensor capping layer and a mask formed over the CMP stop layer. A hard bias layer and second CMP stop layer are deposited over the sensor stack, capping layer, first CMP stop layer and mask. A chemical mechanical polishing process is then performed to remove the mask, leaving a portion of the hard bias layer exposed between the first and second CMP stop layers. An ion milling is then performed to etch back the exposed portions of the hard magnetic bias layer. A reactive ion etching is then performed to remove the remaining first and second CMP top layers. An upper shield can then be formed on a substantially flat surface.
摘要翻译：一种制造具有平坦的上屏蔽的磁传感器的方法。传感器堆叠在其顶部形成有传感器覆盖层，并且在传感器覆盖层上方形成第一CMP停止层，并且在CMP停止层上形成掩模。在传感器堆叠，封盖层，第一CMP停止层和掩模上沉积硬偏压层和第二CMP停止层。然后执行化学机械抛光工艺以去除掩模，使得一部分硬偏压层暴露在第一和第二CMP停止层之间。然后进行离子铣削以蚀刻硬磁偏置层的暴露部分。然后执行反应离子蚀刻以去除剩余的第一和第二CMP顶层。然后可以在基本平坦的表面上形成上屏蔽。

3. 发明授权

US08786988B2 Read sensor having a structure for reducing magnetic coupling between a magnetic bias layer and an upper magnetic shield 有权
标题翻译：具有用于减小磁偏置层和上磁屏蔽之间的磁耦合的结构的读传感器
公开(公告)号：US08786988B2
公开(公告)日：2014-07-22
申请号：US13472326
申请日：2012-05-15
申请人： Hideki Mashima , Nobuo Yoshida , Takahiro Ibusuki , Tsutomu Yasuda
发明人： Hideki Mashima , Nobuo Yoshida , Takahiro Ibusuki , Tsutomu Yasuda
IPC分类号： G11B5/39
CPC分类号： G11B5/3932 , B82Y10/00 , G11B5/3909 , G11B2005/3996
摘要： A magnetic sensor having reduced read gap thickness, reduced signal noise and improved signal to noise ratio. The sensor includes a sensor stack and hard bias structures formed at either side of the sensor stack for biasing the free layer of the sensor. A protective layer is formed over a portion of the hard bias structure, however a portion of the hard bias structure extends upward toward the upper shield and is disposed between the protective layer and the sensor stack as a result of the process used to form the magnetic bias structure. This portion of the hard bias structure that extends toward the upper shield has a reduced magnetization relative to the rest of the hard bias structure so that it will not magnetically couple with the upper shield.
摘要翻译：具有减小的读取间隙厚度，降低的信号噪声和改善的信噪比的磁传感器。传感器包括传感器堆叠和形成在传感器堆叠的任一侧的硬偏压结构，用于偏置传感器的自由层。在硬偏压结构的一部分上形成保护层，然而硬偏压结构的一部分向上朝向上屏蔽延伸，并且由于用于形成磁性的过程而被设置在保护层和传感器堆之间偏倚结构。朝向上屏蔽延伸的硬偏压结构的该部分相对于硬偏压结构的其余部分具有减小的磁化，使得其不会与上屏蔽件磁耦合。

4. 发明授权

US08339752B1 Magnetic head with wide sensor back edge, low resistance, and high signal to-noise ratio and methods of production thereof 有权
标题翻译：具有传感器后端宽，电阻低，信噪比高的磁头及其制造方法
公开(公告)号：US08339752B1
公开(公告)日：2012-12-25
申请号：US13245708
申请日：2011-09-26
申请人： Masashi Hattori , Koichi Nishioka , Koji Sakamoto , Tsutomu Yasuda , Hideki Mashima
发明人： Masashi Hattori , Koichi Nishioka , Koji Sakamoto , Tsutomu Yasuda , Hideki Mashima
IPC分类号： G11B5/39
CPC分类号： H01F10/3254 , G01R33/093 , G11B5/3163 , G11B5/398 , Y10T29/49037
摘要： In one embodiment, a magnetic head includes a magnetoresistive free layer, wherein a width of the free layer nearest an air bearing surface (ABS) is less than a width of the free layer at a point away from the ABS in a track width direction, with the magnetic head being configured to pass a sense current in a direction perpendicular to a plane of deposition of the free layer. In another embodiment, a method includes forming a magnetoresistive film above a shield, forming a masking layer above the magnetoresistive film, patterning the masking layer such that it exposes portions of the magnetoresistive film, wherein the masking layer defines an area which is narrow near an area that forms an ABS side of a free layer and wider at an area away from the ABS, and removing the exposed portions of the magnetoresistive film to form the free layer.
摘要翻译：在一个实施例中，磁头包括无磁阻层，其中最接近空气支承表面（ABS）的自由层的宽度小于在轨道宽度方向上离开ABS的点处的自由层的宽度，其中磁头被配置为在与自由层的沉积平面垂直的方向上传递感测电流。在另一个实施例中，一种方法包括在屏蔽层之上形成磁阻膜，在磁阻膜上方形成掩模层，对掩模层进行图案化以使其暴露磁阻膜的部分，其中掩模层限定一个窄的区域形成自由层的ABS侧并且远离ABS的区域更宽的区域，以及去除磁阻膜的暴露部分以形成自由层。

5. 发明申请

US20100053794A1 THERMALLY ASSISTED MAGNETIC RECORDING METHOD, MAGNETIC RECORDING HEAD, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING APPARATUS 审中-公开
标题翻译：热辅助磁记录方法，磁记录头，磁记录介质和磁记录装置
公开(公告)号：US20100053794A1
公开(公告)日：2010-03-04
申请号：US12498636
申请日：2009-07-07
申请人： Hideki Mashima , Keiichi Nagasaka
发明人： Hideki Mashima , Keiichi Nagasaka
IPC分类号： G11B5/02
CPC分类号： G11B5/314 , G11B2005/0005 , G11B2005/0021
摘要： In a thermally assisted magnetic recording method, tunneling current is applied from a tunneling current wiring arranged on a magnetic recording head configured to fly above a magnetic recording medium having a bit pattern formed of recording bits separated from one another by an insulator to a desired recording bit of the magnetic recording medium, so that the recording bit is heated and thus coercivity of the recording bit is reduced. Then, an alternating magnetic field corresponding to information to be recorded is applied from the magnetic recording head to the heated recording bit, so that the information can be recorded in the magnetic recording medium.
摘要翻译：在热辅助磁记录方法中，隧道电流从设置在磁记录头上的隧道电流布线施加，该磁记录头配置成在具有由绝缘体彼此分离的记录位形成的位图形的磁记录介质上方飞行到所需记录磁记录介质的位，使得记录位被加热，因此记录位的矫顽力降低。然后，将与记录信息相对应的交变磁场从磁记录头施加到加热记录位，使得信息可以记录在磁记录介质中。

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