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公开(公告)号：US20070297097A1
公开(公告)日：2007-12-27
申请号：US11807744
申请日：2007-05-29
IPC分类号： G11B5/11
CPC分类号： G11B5/1278 , G11B5/3967
摘要： Embodiments in accordance with the present invention provide a magnetic head of the CPP structure for perpendicular magnetic recording, that is excellent in read performance, and stable in write/read performances by enhancing the external field durability, and further, suppresses deterioration in read sensor property, due to thermal factors. At least either shield layer of a lower magnetic shield layer, and an upper magnetic shield layer, closer to a perpendicular magnetic write head, is made up so as to have a multi-layered structure comprising low thermal expansion nonmagnetic layers, and magnetic layers. Material having a coefficient of thermal expansion smaller than that of a magnetoresistive film is selected as a material for the low thermal expansion nonmagnetic layers of the shield layer.
摘要翻译： 根据本发明的实施例提供了一种用于垂直磁记录的CPP结构的磁头，其读取性能优异，并且通过增强外部场强耐久性而在写入/读取性能方面稳定，并且还抑制读取传感器性能的劣化 ，由于热因素。 下磁屏蔽层的至少一个屏蔽层和更靠近垂直磁写头的上磁屏蔽层被制成具有包括低热膨胀非磁性层和磁性层的多层结构。 选择热膨胀系数小于磁阻膜的材料作为屏蔽层的低热膨胀非磁性层的材料。
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2.发明授权Magnetic head having shield layer(s) with low coefficient of thermal expansion and magnetic storage apparatus having same 有权具有低热膨胀系数的屏蔽层的磁头和具有这种磁头的磁存储装置公开(公告)号：US08830635B2
公开(公告)日：2014-09-09
申请号：US11807744
申请日：2007-05-29
CPC分类号： G11B5/1278 , G11B5/3967
摘要： Embodiments in accordance with the present invention provide a magnetic head of the CPP structure for perpendicular magnetic recording, that is excellent in read performance, and stable in write/read performances by enhancing the external field durability, and further, suppresses deterioration in read sensor property, due to thermal factors. At least either shield layer of a lower magnetic shield layer, and an upper magnetic shield layer, closer to a perpendicular magnetic write head, is made up so as to have a multi-layered structure comprising low thermal expansion nonmagnetic layers, and magnetic layers. Material having a coefficient of thermal expansion smaller than that of a magnetoresistive film is selected as a material for the low thermal expansion nonmagnetic layers of the shield layer.
摘要翻译： 根据本发明的实施例提供了一种用于垂直磁记录的CPP结构的磁头，其读取性能优异，并且通过增强外部场强耐久性而在写入/读取性能方面稳定，并且还抑制读取传感器性能的劣化 ，由于热因素。 下磁屏蔽层的至少一个屏蔽层和更靠近垂直磁写头的上磁屏蔽层被制成具有包括低热膨胀非磁性层和磁性层的多层结构。 选择热膨胀系数小于磁阻膜的材料作为屏蔽层的低热膨胀非磁性层的材料。
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公开(公告)号：US08149548B2
公开(公告)日：2012-04-03
申请号：US12386458
申请日：2009-04-17
IPC分类号： G11B5/39
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G11B5/3912 , G11B5/3932 , G11B2005/3996
摘要： Embodiments of the present invention provide a magnetic head having a read head of stable reading operation and with less magnetic fluctuation noise. According to one embodiment, a free layer has a structure comprising two ferromagnetic layers (a first free layer and a second free layer) that are coupled anti-ferromagnetically by way of a non-magnetic intermediate layer, in which the magnetization amount of the first free layer is set to larger than the magnetization amount of the second free layer. Further, the magnetic domains in the first free layer and the second free layer are stabilized simultaneously by increasing the distance between the second free layer and the magnetic domain control film to be more than the distance between the first free layer and the magnetic domain control film, thereby adjusting the magnetization amount of the magnetic domain control film. Further, the volume of the entire free layer is increased thereby greatly decreasing the magnetic fluctuation noises, to obtain a read head showing a high SN ratio.
摘要翻译： 本发明的实施例提供了一种具有稳定读取操作的读取头并具有较小的磁波动噪声的磁头。 根据一个实施例，自由层具有包括通过非磁性中间层反铁磁耦合的两个铁磁层（第一自由层和第二自由层）的结构，其中第一 自由层被设定为大于第二自由层的磁化量。 此外，第一自由层和第二自由层中的磁畴通过将第二自由层和磁畴控制膜之间的距离增大到第一自由层和磁畴控制膜之间的距离而同时稳定 从而调整磁畴控制膜的磁化量。 此外，整个自由层的体积增加，从而大大降低磁波动噪声，以获得显示高SN比的读头。
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公开(公告)号：US20090262465A1
公开(公告)日：2009-10-22
申请号：US12386458
申请日：2009-04-17
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G11B5/3912 , G11B5/3932 , G11B2005/3996
摘要： Embodiments of the present invention provide a magnetic head having a read head of stable reading operation and with less magnetic fluctuation noise. According to one embodiment, a free layer has a structure comprising two ferromagnetic layers (a first free layer and a second free layer) that are coupled anti-ferromagnetically by way of a non-magnetic intermediate layer, in which the magnetization amount of the first free layer is set to larger than the magnetization amount of the second free layer. Further, the magnetic domains in the first free layer and the second free layer are stabilized simultaneously by increasing the distance between the second free layer and the magnetic domain control film to be more than the distance between the first free layer and the magnetic domain control film, thereby adjusting the magnetization amount of the magnetic domain control film. Further, the volume of the entire free layer is increased thereby greatly decreasing the magnetic fluctuation noises, to obtain a read head showing a high SN ratio.
摘要翻译： 本发明的实施例提供了一种具有稳定读取操作的读取头并具有较小的磁波动噪声的磁头。 根据一个实施例，自由层具有包括通过非磁性中间层反铁磁耦合的两个铁磁层（第一自由层和第二自由层）的结构，其中第一 自由层被设定为大于第二自由层的磁化量。 此外，第一自由层和第二自由层中的磁畴通过将第二自由层和磁畴控制膜之间的距离增大到第一自由层和磁畴控制膜之间的距离而同时稳定 从而调整磁畴控制膜的磁化量。 此外，整个自由层的体积增加，从而大大降低磁波动噪声，以获得显示高SN比的读头。
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5.发明授权公开(公告)号：US09230574B2
公开(公告)日：2016-01-05
申请号：US12631295
申请日：2009-12-04
申请人： Nobuo Yoshida , Katsuro Watanabe , Masahiro Ousugi , Atsushi Kato
发明人： Nobuo Yoshida , Katsuro Watanabe , Masahiro Ousugi , Atsushi Kato
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G11B5/3932 , G11B2005/3996 , Y10T29/49032
摘要： According to one embodiment, a CPP structure magnetoresistive head includes a magnetoresistive sensor film between a lower shield layer and an upper shield layer and a longitudinal biasing layer disposed at each side of the magnetoresistive sensor film via a read track width defining insulator film. In the stripe height direction, the length of the longitudinal biasing layer is longer than the length of a second ferromagnetic layer in which its magnetization rotates in response to the external magnetic field. The second ferromagnetic layer is one of the layers comprising the magnetoresistive sensor film. At a stripe height, the surface of each longitudinal biasing layer has a step to change the thickness thereof across the step so that the air bearing surface section thereof has a larger thickness than any other section. Other structures using a magnetoresistive head and methods of production thereof are described as well.
摘要翻译： 根据一个实施例，CPP结构磁阻头包括在下屏蔽层和上屏蔽层之间的磁阻传感器膜和经由读磁道宽度限定绝缘膜设置在磁阻传感器膜的每一侧的纵向偏置层。 在条带高度方向上，纵向偏置层的长度长于其磁化响应于外部磁场而旋转的第二铁磁层的长度。 第二铁磁层是包括磁阻传感器膜的层之一。 在条带高度处，每个纵向偏置层的表面具有改变其横跨该台阶的厚度的步骤，使得其空气轴承表面部分具有比任何其它部分更大的厚度。 还描述了使用磁阻头的其它结构及其生产方法。
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公开(公告)号：US08184406B2
公开(公告)日：2012-05-22
申请号：US11786458
申请日：2007-04-10
申请人： Nubuo Yoshida , Katsuro Watanabe , Takayoshi Ohtsu
发明人： Nubuo Yoshida , Katsuro Watanabe , Takayoshi Ohtsu
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3163 , G11B5/3929 , G11B2005/3996 , H01F41/34 , Y10T29/49021
摘要： Embodiments in accordance with the present invention provide a thin film magnetic head for preventing a short-circuit failure during formation of a track portion or a stripe-height portion and improving a yield. In one embodiment, a stripe-height direction is first formed, and then a track-width direction is formed. A third insulating film having a smoothly shaped wall surface is formed on a first insulating film during stripe-height formation. During formation of the third insulating film, an optimized lift-off pattern is used to smooth an edge shape.
摘要翻译： 根据本发明的实施例提供了一种薄膜磁头，用于防止在形成轨道部分或条纹高度部分期间发生短路故障并提高产量。 在一个实施例中，首先形成条纹高度方向，然后形成轨道宽度方向。 在条纹高度形成期间，在第一绝缘膜上形成具有平滑形状的壁表面的第三绝缘膜。 在第三绝缘膜的形成期间，使用优化的剥离图案来平滑边缘形状。
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公开(公告)号：US20080212238A1
公开(公告)日：2008-09-04
申请号：US12012341
申请日：2008-01-31
申请人： Katsuro Watanabe , Satoru Okamoto , Masahiro Osugi , Koji Okazaki
发明人： Katsuro Watanabe , Satoru Okamoto , Masahiro Osugi , Koji Okazaki
IPC分类号： G11B5/33
CPC分类号： G11B5/59633 , G11B5/59666
摘要： Embodiments of the present invention help to efficiently apply a longitudinal biasing with appropriate strength from a longitudinal biasing layer to a free layer even in a small read gap length. According to one embodiment, in the track width direction of the magnetoresistive film, the longitudinal biasing layer excluding its portion close to the magnetoresistive film is made approximately uniform in thickness. An edge toward the magnetoresistive film of the longitudinal biasing layer is positioned more outwardly in the track width direction than an edge in the track width direction of the free layer. A portion closest to the substrate of the interface between the longitudinal biasing layer and the insulator on the track-width sides is positioned lower than the interface between the magnetoresistive film and the lower magnetic shield layer.
摘要翻译： 本发明的实施例有助于即使在小的读取间隙长度中也可以将具有适当强度的纵向偏置从纵向偏置层施加到自由层。 根据一个实施例，在磁阻膜的磁道宽度方向上，除了靠近磁阻膜的部分之外的纵向偏置层的厚度大致均匀。 朝向纵向偏置层的磁阻膜的边缘比沿自由层的轨道宽度方向的边缘更靠外侧位于轨道宽度方向上。 在纵向偏置层和轨道宽度侧的绝缘体之间的界面最靠近的部分位于低于磁阻膜和下部磁屏蔽层之间的界面的位置。
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公开(公告)号：US20080062579A1
公开(公告)日：2008-03-13
申请号：US11845010
申请日：2007-08-24
IPC分类号： G11B5/33
CPC分类号： G11B5/3163 , G11B5/3169 , G11B5/3173 , G11B5/6011 , Y10T29/49021 , Y10T29/49032 , Y10T29/49041
摘要： Embodiments of the present invention provide a method of fabricating a magnetic head slider realizing high-recording density at high-yields by preventing formation of a short circuit on the air-bearing surface of a magnetic head slider and preventing formation of an oxidized layer with significant film thickness which increases the effective magnetic spacing, on the air-bearing surface of the magnetic head slider. According to one embodiment, after air-bearing surface mechanical lapping of a row bar or a magnetic head slider, cleaning is performed by ion beam bombardment to remove a conductive smear. Oxygen exposure is performed to recover a damaged region which was formed by ion beam bombardment at the end face of an intermediate layer of a magnetoresistive film 5. Thereafter, air-bearing surface protection films are formed and followed by rail formation. If the processes are performed on the row bar, the row bar is cut into individual separated magnetic head sliders.
摘要翻译： 本发明的实施例提供一种制造磁头滑块的方法，其通过防止在磁头滑块的空气轴承表面上形成短路而以高产率实现高记录密度，并且防止形成具有显着性的氧化层 在磁头滑块的空气轴承表面上增加有效磁间距的膜厚度。 根据一个实施例，在排杆或磁头滑块的空气轴承表面机械研磨之后，通过离子束轰击进行清洁以除去导电涂片。 进行氧曝光以回收在磁阻膜5的中间层的端面处通过离子束轰击形成的损伤区域。之后，形成空气轴承表面保护膜，然后形成轨道。 如果在行条上执行过程，则将行条切割成单独的分离的磁头滑块。
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9.发明授权CPP-type magnetic head with less deformation and a magnetic recording/reproducing system using the same 失效具有较小变形的CPP型磁头和使用其的磁记录/再现系统公开(公告)号：US07154713B2
公开(公告)日：2006-12-26
申请号：US11322262
申请日：2006-01-03
IPC分类号： G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/102 , G11B5/3106 , G11B5/3133 , G11B5/3163 , G11B5/3169 , G11B5/3903 , G11B5/3909 , G11B5/3912 , G11B5/398 , G11B5/40 , G11B2005/3996
摘要： A high output, magnetoresistive head with a CPP structure is disclosed which reduces or prevents deformation near the air bearing surface of the read element portion layer at the time of air bearing surface processing. In the CPP structure magnetoresistive head, the deformation near the air bearing surface as a result of mechanical polishing during the air bearing surface processing can be reduced by forming deformation prevention layers having a higher shear modulus than the first ferromagnetic layer, and a second ferromagnetic layer between a magnetoresistive film and at least one of a lower shield layer and an upper shield layer.
摘要翻译： 公开了一种具有CPP结构的高输出磁阻头，其在空气轴承表面处理时减小或防止读取元件部分层的空气支承表面附近的变形。 在CPP结构磁阻头中，通过形成具有比第一铁磁层更高的剪切模量的变形防止层，可以减少在空气轴承表面加工期间由于机械抛光而在空气轴承表面附近的变形，以及第二铁磁层 在磁阻膜和下屏蔽层和上屏蔽层中的至少一个之间。
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公开(公告)号：US20060274457A1
公开(公告)日：2006-12-07
申请号：US11501844
申请日：2006-08-10
申请人： Katsuro Watanabe , Kikuo Kusukawa , Kenichi Meguro
发明人： Katsuro Watanabe , Kikuo Kusukawa , Kenichi Meguro
IPC分类号： G11B5/33
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/313 , G11B5/3903 , G11B5/3909 , G11B5/40 , G11B2005/3996
摘要： A magnetoresistive head of a type including a magnetoresistive film arranged between a lower shield layer and an upper shield layer, wherein the lower shield layer has a non-magnetic layer adjacent to it and the lower shield layer and the upper shield layer are formed such that their separation at at least part of a boundary between the lower shield layer and the upper shield layer is larger than their separation in a vicinity of the magnetoresistive film, and an insulating film is arranged between the lower shield layer and the upper shield layer, wherein the lower shield layer and the non-magnetic layer adjacent thereto are formed such that they differ in height and there exists a difference in level at their boundary.
摘要翻译： 一种包括布置在下屏蔽层和上屏蔽层之间的磁阻膜的类型的磁阻头，其中下屏蔽层具有与其相邻的非磁性层，并且形成下屏蔽层和上屏蔽层，使得 它们在下屏蔽层和上屏蔽层之间的边界的至少一部分上的分离大于其在磁阻膜附近的分离，并且绝缘膜设置在下屏蔽层和上屏蔽层之间，其中 形成下部屏蔽层和与其相邻的非磁性层，使得它们的高度不同，并且在其边界处存在水平差异。
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