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公开(公告)号：US20090059427A1
公开(公告)日：2009-03-05
申请号：US12231246
申请日：2008-08-28
申请人： Kazue Kudo , Hiromi Shiina , Gen Oikawa , Yoji Maruyama , Noriyuki Saiki
发明人： Kazue Kudo , Hiromi Shiina , Gen Oikawa , Yoji Maruyama , Noriyuki Saiki
IPC分类号： G11B5/127
CPC分类号： G11B5/3146 , G11B5/1278 , G11B5/315 , G11B5/3163 , Y10T29/49044 , Y10T29/4906
摘要： Embodiments of the present invention help to provide a perpendicular magnetic recording head capable of writing a signal in a track having a small width. According to one embodiment, a perpendicular magnetic recording head includes an auxiliary pole, a main pole, a yoke, a coil, a first soft magnetic film and a second soft magnetic film. The yoke is in contact with the main pole. The coil is wound around a magnetic circuit composed of the auxiliary and main poles and the yoke. The first soft magnetic film is provided on both sides of the main pole with a non-magnetic film provided between the first soft magnetic film and the main pole. The second soft magnetic film is provided on the trailing side of the main pole with the non-magnetic film provided between the second soft magnetic film and the main pole. The first and second soft magnetic films are two types of plated magnetic films. One type of the plated magnetic films have respective thicknesses of 0.5 nm to 20 nm and respective body centered cubic lattice crystal structures. The other types of the plated magnetic films have respective thicknesses of 0.5 nm to 20 nm and respective face centered cubic lattice crystal structures. The two types of the plated magnetic films are alternately laminated with four or more layers. This can achieve the magnetic disk drive capable of reducing a possibility to erroneously delete a signal after the signal being written and preventing degradation of characteristics of a high frequency signal.
摘要翻译： 本发明的实施例有助于提供一种能够在具有小宽度的轨迹中写入信号的垂直磁记录头。 根据一个实施例，垂直磁记录头包括辅助极，主极，磁轭，线圈，第一软磁膜和第二软磁膜。 轭与主极接触。 线圈缠绕在由辅助和主极和轭构成的磁路上。 第一软磁膜设置在主极的两侧，设置在第一软磁膜和主极之间的非磁性膜。 第二软磁膜设置在主极的后侧，设置在第二软磁膜和主极之间的非磁性膜。 第一和第二软磁膜是两种类型的镀覆磁性膜。 一种类型的电镀磁性膜具有0.5nm至20nm的各自的厚度和相应的体心立方晶格结构。 其他类型的镀膜磁性膜具有0.5nm至20nm的各自的厚度和各自的面心立方晶格结构。 两种类型的镀覆磁性膜交替地层压有四层或更多层。 这可以实现能够降低信号被写入之后错误地删除信号的可能性的磁盘驱动器，并且防止高频信号的特性的劣化。
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公开(公告)号：US20090154014A1
公开(公告)日：2009-06-18
申请号：US12313965
申请日：2008-11-25
申请人： Kazue Kudo , Hiromi Shiina , Yoji Maruyama , Gen Oikawa
发明人： Kazue Kudo , Hiromi Shiina , Yoji Maruyama , Gen Oikawa
CPC分类号： G11B5/3163 , C25D3/562 , C25D5/08 , C25D5/18 , C25D21/10 , G11B5/147 , G11B5/3109
摘要： Embodiments of the present invention improve the recording density of a magnetic disk drives by providing a write head capable of writing adequately on a narrow trackwidth and high coercivity recording media. According to one embodiment, a thin film magnetic head has a write head which comprises at least a main magnetic pole, a yoke and a return pole, wherein a magnetic film which constitutes at least a part of the main magnetic pole, the yoke or the return pole is formed by alternately plating first magnetic layers and second magnetic layers, each of the first magnetic layer being of the body-centered cubic phase and containing at least two of elements Co, Ni and Fe, and each of the second magnetic layer being of the face-centered cubic phase and containing at least two of elements Co, Ni and Fe. The thin-film magnetic head can attain high Bs even if the magnetic film is thinned. In addition, high μ can be attained even when the recording frequency is high.
摘要翻译： 本发明的实施例通过提供能够在窄轨道宽度和高矫顽力记录介质上充分写入的写入头来提高磁盘驱动器的记录密度。 根据一个实施例，薄膜磁头具有至少包括主磁极，磁轭和返回磁极的写入头，其中构成主磁极的至少一部分的磁性膜，磁轭或 返回极通过交替地电镀第一磁性层和第二磁性层而形成，每个第一磁性层是体心立方相，并且包含元素Co，Ni和Fe中的至少两种，并且每个第二磁性层是 的面心立方相并含有至少两种元素Co，Ni和Fe。 即使磁性膜变薄，薄膜磁头也可以达到高的Bs。 此外，即使记录频率高，也可以获得高的μ。
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公开(公告)号：US20080198507A1
公开(公告)日：2008-08-21
申请号：US12070155
申请日：2008-02-15
申请人： Yoji Maruyama , Tadayuki Iwakura , Kimitoshi Etoh , Hiromi Shiina , Kazue Kudo
发明人： Yoji Maruyama , Tadayuki Iwakura , Kimitoshi Etoh , Hiromi Shiina , Kazue Kudo
IPC分类号： G11B5/17
CPC分类号： G11B5/1278 , G11B5/112 , G11B5/3116 , G11B5/3146 , G11B5/315 , G11B5/3163
摘要： Embodiments of the present invention help to suppress broadening of a write field of a main pole of a perpendicular recording head and realize high-quality write operation. According to one embodiment, a main pole of a write head extends to an air bearing surface or a medium-facing surface and has an inverted trapezoid in cross-section. First soft magnetic films called side shields are separately disposed through a nonmagnetic film on both sides of the main pole. The air bearing surface side end of the first soft magnetic film is provided to recede from the air bearing surface. The first soft magnetic film and the main pole are formed in the same layer. A second soft magnetic film called a trailing shield is provided above the main pole on the air bearing surface side via a nonmagnetic film.
摘要翻译： 本发明的实施例有助于抑制垂直记录头的主极的写入场的扩展，并且实现高质量的写入操作。 根据一个实施例，写入头的主极延伸到空气轴承表面或中等的表面，并且具有横截面的倒梯形。 称为侧屏的第一软磁膜通过主极两侧的非磁性膜分开设置。 第一软磁性膜的空气轴承面侧端设置为从空气轴承面退回。 第一软磁膜和主极形成在同一层中。 被称为后挡板的第二软磁膜通过非磁性膜设置在空气支承面侧的主极上方。
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4.发明授权公开(公告)号：US07551395B2
公开(公告)日：2009-06-23
申请号：US11492378
申请日：2006-07-24
申请人： Yoji Maruyama , Kazue Kudo , Ichiro Ohdake , Tadayuki Iwakura
发明人： Yoji Maruyama , Kazue Kudo , Ichiro Ohdake , Tadayuki Iwakura
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146
摘要： A magnetic head with a narrow track width angle and of excellent mass productivity is provided for attaining a large capacity magnetic disk drive. In an embodiment, a perpendicular recording magnetic head includes: a first non-magnetic film and a first soft magnetic film stacked on the trailing side of a main magnetic pole piece for constituting a gap film; a second non-magnetic layer in contact with the end face of the first non-magnetic layer on both sides of the main magnetic pole piece; a third soft magnetic film in contact with the second non-magnetic layer on both sides of the main magnetic pole piece; and a second soft magnetic film in contact with the first soft magnetic film and the third soft magnetic film on the trailing side of the main magnetic pole.
摘要翻译： 为了获得大容量磁盘驱动器，提供了具有窄轨道宽度角和优异的批量生产率的磁头。 在一个实施例中，垂直记录磁头包括：第一非磁性膜和第一软磁膜，堆叠在用于构成间隙膜的主磁极片的后侧; 与主磁极片两侧的第一非磁性层的端面接触的第二非磁性层; 与主磁极片两侧的第二非磁性层接触的第三软磁性膜; 以及与主磁极的后侧上的第一软磁膜和第三软磁膜接触的第二软磁膜。
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5.发明申请公开(公告)号：US20070019327A1
公开(公告)日：2007-01-25
申请号：US11492378
申请日：2006-07-24
申请人： Yoji Maruyama , Kazue Kudo , Ichiro Ohdake , Tadayuki Iwakura
发明人： Yoji Maruyama , Kazue Kudo , Ichiro Ohdake , Tadayuki Iwakura
IPC分类号： G11B5/147
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146
摘要： A magnetic head with a narrow track width angle and of excellent mass productivity is provided for attaining a large capacity magnetic disk drive. In an embodiment, a perpendicular recording magnetic head includes: a first non-magnetic film and a first soft magnetic film stacked on the trailing side of a main magnetic pole piece for constituting a gap film; a second non-magnetic layer in contact with the end face of the first non-magnetic layer on both sides of the main magnetic pole piece; a third soft magnetic film in contact with the second non-magnetic layer on both sides of the main magnetic pole piece; and a second soft magnetic film in contact with the first soft magnetic film and the third soft magnetic film on the trailing side of the main magnetic pole.
摘要翻译： 为了获得大容量磁盘驱动器，提供了具有窄轨道宽度角和优异的批量生产率的磁头。 在一个实施例中，垂直记录磁头包括：第一非磁性膜和第一软磁膜，堆叠在用于构成间隙膜的主磁极片的后侧; 与主磁极片两侧的第一非磁性层的端面接触的第二非磁性层; 与主磁极片两侧的第二非磁性层接触的第三软磁性膜; 以及与主磁极的后侧上的第一软磁膜和第三软磁膜接触的第二软磁膜。
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公开(公告)号：US07646564B2
公开(公告)日：2010-01-12
申请号：US11371609
申请日：2006-03-08
申请人： Yoji Maruyama , Hideki Zaitsu , Ichiro Ohdake , Kazue Kudo , Masafumi Mochizuki
发明人： Yoji Maruyama , Hideki Zaitsu , Ichiro Ohdake , Kazue Kudo , Masafumi Mochizuki
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3146 , G11B5/3163
摘要： Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.
摘要翻译： 本发明的实施例提供一种具有窄轨迹和优异的高频特性的垂直磁头。 在一个实施例中，记录磁头包括线圈导体和放置在其间的磁极片，其中主磁极片形成为平面结构，并且与主磁极片以磁耦合关系连接的磁膜为 在膜厚度方向上弯曲。 此外，设置在主磁极片附近的屏蔽材料由比用于读屏蔽材料的电阻高的材料制成。
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公开(公告)号：US20060203384A1
公开(公告)日：2006-09-14
申请号：US11371609
申请日：2006-03-08
申请人： Yoji Maruyama , Hideki Zaitsu , Ichiro Ohdake , Kazue Kudo , Masafumi Mochizuki
发明人： Yoji Maruyama , Hideki Zaitsu , Ichiro Ohdake , Kazue Kudo , Masafumi Mochizuki
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3146 , G11B5/3163
摘要： Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.
摘要翻译： 本发明的实施例提供一种具有窄轨迹和优异的高频特性的垂直磁头。 在一个实施例中，记录磁头包括线圈导体和放置在其间的磁极片，其中主磁极片形成为平面结构，并且与主磁极片以磁耦合关系连接的磁膜为 在膜厚度方向上弯曲。 此外，设置在主磁极片附近的屏蔽材料由比用于读屏蔽材料的电阻高的材料制成。
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公开(公告)号：US20070188921A1
公开(公告)日：2007-08-16
申请号：US11707804
申请日：2007-02-15
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1871 , G11B5/3163
摘要： Embodiments in accordance with the present invention provide a magnetic head in which broadening of the effective track width can be decreased without reducing the write-field intensity and a variation of the track width can be decreased. A main pole consists of a pole tip having a part which provides the write track-width and a yoke part recessed from the air beating surface in the element height direction, and the pole tip consists of a pole tip at the trailing side where the width in the track-width direction is large and a pole tip at the leading side where the width in the track width direction is small. Moreover, the throat height of the pole tip at the trailing side is made greater than the throat height of the pole tip at the leading side.
摘要翻译： 根据本发明的实施例提供一种磁头，其中可以在不降低写入场强度的情况下降低有效磁道宽度的扩大，并且可以减小磁道宽度的变化。 主极包括具有提供写入轨道宽度的部分的极尖和在元件高度方向上从空气打浆表面凹陷的轭部，并且极尖由在后侧的极尖组成，其中宽度 在轨道宽度方向上较大，并且在轨道宽度方向上的宽度小的前端的极尖。 此外，使尾端在后侧的喉部高度大于前端的极尖的喉部高度。
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9.发明申请Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function 失效具有使用用于飞行高度管理的热突起量的功能的磁盘驱动器和具有这种功能的检查装置公开(公告)号：US20050046985A1
公开(公告)日：2005-03-03
申请号：US10890073
申请日：2004-07-12
申请人： Akira Morinaga , Yoji Maruyama , Hiroshi Ide , Norifumi Miyamoto
发明人： Akira Morinaga , Yoji Maruyama , Hiroshi Ide , Norifumi Miyamoto
CPC分类号： G11B5/6005 , G11B5/3136 , G11B5/607
摘要： A write head's material having a great thermal expansion coefficient expands due to Joule heat resulting from a write current and a temperature rise dependent on high-frequency core loss, thereby causing the head's flying surface to protrude toward a magnetic disk. This phenomenon is called TPR (thermal protrusion). It is essential that the flying height be accurately determined and managed in consideration of TPR. A magnetic disk drive for actual use or a magnetic disk drive that is in a testing process but similar to the one for actual use is used to measure TPR amount changes resulting from a write operation, store the resulting measured data in a memory or on the magnetic disk, and perform flying height management with the stored measured data. Further, flying height management is performed as needed in conjunction with a SMART function. The present invention makes it possible to perform high-reliability flying height management.
摘要翻译： 具有大的热膨胀系数的写头材料由于写入电流引起的焦耳热和依赖于高频磁芯损耗的温度升高而扩大，从而使磁头的飞行表面朝向磁盘突出。 这种现象称为TPR（热突起）。 考虑到TPR，飞行高度必须准确确定和管理至关重要。 用于实际使用的磁盘驱动器或处于测试过程中但类似于实际使用的磁盘驱动器用于测量由写入操作导致的TPR量变化，将得到的测量数据存储在存储器中或在 磁盘，并使用存储的测量数据执行飞行高度管理。 此外，根据需要结合SMART功能执行飞行高度管理。 本发明能够进行高可靠性的飞行高度管理。
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公开(公告)号：US5023473A
公开(公告)日：1991-06-11
申请号：US593375
申请日：1990-10-01
申请人： Takashi Toyooka , Yoji Maruyama , Ryo Suzuki
发明人： Takashi Toyooka , Yoji Maruyama , Ryo Suzuki
CPC分类号： G11C19/085 , H03K4/06 , H03K4/94
摘要： This invention accomplishes low power consumption by a drive circuit for a Bloch line memory, which includes a power source, a bias magnetic field coil, a plurality of switching means and means for returning the power supplied to the bias magnetic field to the power source. The present invention can set the waveform of a pulse current (coil current) to a desired waveform by particularly using a transformer, and can improve the transfer characteristics of the Both line pair.
摘要翻译： 本发明通过用于Bloch线路存储器的驱动电路实现低功耗，其包括电源，偏置磁场线圈，多个开关装置和用于将供应到偏置磁场的电力返回到电源的装置。 本发明可以通过特别使用变压器将脉冲电流（线圈电流）的波形设定为期望的波形，并且可以提高双线对的传输特性。
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