公开(公告)号：US08570683B2

公开(公告)日：2013-10-29

申请号：US13168083

申请日：2011-06-24

申请人： Yusuke Takahashi ,  Hiromi Shiina ,  Kazue Kudo ,  Yohji Maruyama ,  Kaori Suzuki

发明人： Yusuke Takahashi ,  Hiromi Shiina ,  Kazue Kudo ,  Yohji Maruyama ,  Kaori Suzuki

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278

摘要： In one embodiment, a perpendicular magnetic head includes a main magnetic pole, a side shield disposed on both sides of the main magnetic pole in a track width direction, the side shield including a material having a saturation magnetic flux density of no greater than about 1.0 T, and a trailing shield disposed on a trailing side of the main magnetic pole, wherein the trailing shield and the side shield are physically separated from one another. In another embodiment, the side shield includes a first magnetic film, and the trailing shield includes a second magnetic film, wherein a magnetic permeability of the first magnetic film is lower than a magnetic permeability of the second magnetic film.

摘要翻译： 在一个实施例中，垂直磁头包括主磁极，设置在主磁极的轨道宽度方向两侧的侧屏蔽，侧屏蔽包括饱和磁通密度不大于约1.0的材料 T和设置在主磁极的后侧的后屏蔽，其中后屏蔽和侧屏在物理上彼此分离。 在另一个实施例中，侧屏蔽包括第一磁性膜，并且后屏蔽包括第二磁性膜，其中第一磁性膜的磁导率低于第二磁性膜的磁导率。

公开(公告)号：US20120327531A1

公开(公告)日：2012-12-27

申请号：US13168083

申请日：2011-06-24

申请人： Yusuke Takahashi ,  Hiromi Shiina ,  Kazue Kudo ,  Yohji Maruyama ,  Kaori Suzuki

发明人： Yusuke Takahashi ,  Hiromi Shiina ,  Kazue Kudo ,  Yohji Maruyama ,  Kaori Suzuki

IPC分类号： G11B21/02 ,  G11B5/33

CPC分类号： G11B5/3116 ,  G11B5/1278

摘要： In one embodiment, a perpendicular magnetic head includes a main magnetic pole, a side shield disposed on both sides of the main magnetic pole in a track width direction, the side shield including a material having a saturation magnetic flux density of no greater than about 1.0 T, and a trailing shield disposed on a trailing side of the main magnetic pole, wherein the trailing shield and the side shield are physically separated from one another. In another embodiment, the side shield includes a first magnetic film, and the trailing shield includes a second magnetic film, wherein a magnetic permeability of the first magnetic film is lower than a magnetic permeability of the second magnetic film.

摘要翻译： 在一个实施例中，垂直磁头包括主磁极，设置在主磁极的轨道宽度方向两侧的侧屏蔽，侧屏蔽包括饱和磁通密度不大于约1.0的材料 T和设置在主磁极的后侧的后屏蔽，其中后屏蔽和侧屏在物理上彼此分离。 在另一个实施例中，侧屏蔽包括第一磁性膜，并且后屏蔽包括第二磁性膜，其中第一磁性膜的磁导率低于第二磁性膜的磁导率。

公开(公告)号：US08300358B2

公开(公告)日：2012-10-30

申请号：US12070155

申请日：2008-02-15

申请人： Yohji Maruyama ,  Tadayuki Iwakura ,  Kimitoshi Etoh ,  Hiromi Shiina ,  Kazue Kudo

发明人： Yohji Maruyama ,  Tadayuki Iwakura ,  Kimitoshi Etoh ,  Hiromi Shiina ,  Kazue Kudo

IPC分类号： G11B5/127

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。

公开(公告)号：US08189293B1

公开(公告)日：2012-05-29

申请号：US13096775

申请日：2011-04-28

申请人： Yasuhiro Wakabayashi ,  Kazue Kudo ,  Shouji Tokutake ,  Hiromi Shiina ,  Yohji Maruyama

发明人： Yasuhiro Wakabayashi ,  Kazue Kudo ,  Shouji Tokutake ,  Hiromi Shiina ,  Yohji Maruyama

IPC分类号： G11B5/31

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3163

摘要： According to one embodiment, a perpendicular magnetic recording head includes a shield having a groove and a main magnetic pole positioned in the groove of the shield. The groove includes a bottom side near a leading edge of the shield and inclined sides extending from the bottom side toward a trailing edge of the shield and from an ABS side of the head to a recessed side of the shield opposite the ABS. The shield is coupled to a non-magnetic layer at the recessed side, a cross-sectional area of the groove is less at a position nearer to the substrate than a position farther from the substrate, a cross-sectional area of the groove is less at a position nearer to the ABS side of the shield than a position farther from the ABS side of the shield, and a portion of the sides of the groove have curved surfaces.

摘要翻译： 根据一个实施例，垂直磁记录头包括具有凹槽和位于屏蔽的槽中的主磁极的屏蔽。 凹槽包括靠近屏蔽件前缘的底侧和从屏蔽的底侧向后缘延伸的倾斜侧和从头部的ABS侧到与ABS相对的屏蔽件的凹入侧。 屏蔽层在凹陷侧耦合到非磁性层，在远离基板的位置处，在较靠近基板的位置处的沟槽的横截面积较小，凹槽的横截面积较小 在远离防护罩的ABS侧的位置更靠近防护罩的ABS侧的位置处，并且槽的一部分侧面具有曲面。

公开(公告)号：US08064161B2

公开(公告)日：2011-11-22

申请号：US12231246

申请日：2008-08-28

申请人： Kazue Kudo ,  Hiromi Shiina ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki

发明人： Kazue Kudo ,  Hiromi Shiina ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki

IPC分类号： H04R31/00 ,  G11B5/147

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。

公开(公告)号：US20080075977A1

公开(公告)日：2008-03-27

申请号：US11820598

申请日：2007-06-19

申请人： Kazue Kudo ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki ,  Hiromi Shiina

发明人： Kazue Kudo ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki ,  Hiromi Shiina

IPC分类号： G11B5/33 ,  H04R31/00

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/313 ,  Y10T29/49032 ,  Y10T428/115

摘要： Embodiments of the present invention provide a magnetic disk drive capable of allowing higher data transfer rates and higher recording densities. According to one embodiment, an upper magnetic core and lower magnetic core comprise a multi-layered magnetic film formed by alternately stacking a face-centered cubic (fcc) crystalline magnetic thin layer and a body-centered cubic (bcc) crystalline magnetic thin layer by plating. The plating bath is such that the temperature is about 30±1° C., pH is about 2.0−1.0 to 2.0+0.5, metal ion concentrations are about 5 to 25 (g/l) for Ni2+ and 5 to 15 (g/l) for Fe2+, saccharin sodium concentration is about 1.5±1.0 (g/l), sodium chloride concentration is about 25±5 (g/l), and boric acid concentration is about 25±5 (g/l). Since each layer's crystal structure is different from that of its adjacent lower layer, epitaxial growth is broken within each layer. Thus, since crystal grains are reduced in size, it is possible to lessen the decrease of the permeability μ at higher frequencies.

摘要翻译： 本发明的实施例提供一种能够允许更高数据传输速率和更高记录密度的磁盘驱动器。 根据一个实施例，上磁芯和下磁芯包括通过交替地将面心立方（fcc）晶体磁性薄层和体心立方（bcc）结晶磁性薄层交替堆叠而形成的多层磁性膜， 电镀。 电镀浴温度为约30±1℃，pH为约2.0-1.0至2.0 + 0.5，Ni2 +和5至15（g / l）的金属离子浓度为约5至25（g / l） l）对于Fe2 +，糖精钠浓度约为1.5±1.0（g / l），氯化钠浓度约为25±5（g / l），硼酸浓度约为25±5（g / l）。 由于每个层的晶体结构与其相邻的下层的晶体结构不同，所以在每个层内外延生长被破坏。 因此，由于晶粒尺寸减小，因此能够降低高频率下的磁导率μμ的降低。

公开(公告)号：US08542462B2

公开(公告)日：2013-09-24

申请号：US12827999

申请日：2010-06-30

申请人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

发明人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

摘要： According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole having a trailing side and two lateral sides, a magnetic shield near the trailing side and both lateral sides of the main magnetic pole, the magnetic shield comprising: a first soft magnetic film with a relatively high saturation flux density positioned facing depthwise from a floating surface side thereof, a second soft magnetic film with a relatively low saturation flux density, and a first non-magnetic film. The head also includes a non-magnetic film interposed between the magnetic shield and the main magnetic pole, a first magnetic film magnetically coupled to the magnetic shield and the main magnetic pole on a side opposite a floating surface side thereof, and a coil surrounding a magnetic circuit, the magnetic circuit comprising the main magnetic pole and the first magnetic film. Other systems and methods are also described.

摘要翻译： 根据一个实施例，垂直磁记录头包括具有后侧和两个侧面的主磁极，靠近主磁极的后侧和两侧的磁屏蔽，磁屏蔽包括：第一软磁 具有从其浮动表面侧朝向深度方向定位的相对较高的饱和磁通密度的膜，具有相对低的饱和磁通密度的第二软磁膜和第一非磁性膜。 头部还包括插入在磁屏蔽和主磁极之间的非磁性膜，磁性地耦合到磁屏蔽的第一磁性膜和与其浮动表面侧相对的一侧的主磁极，以及围绕 所述磁路包括所述主磁极和所述第一磁性膜。 还描述了其它系统和方法。

公开(公告)号：US07995311B2

公开(公告)日：2011-08-09

申请号：US11820554

申请日：2007-06-19

申请人： Kazue Kudo ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki ,  Hiromi Shiina

发明人： Kazue Kudo ,  Gen Oikawa ,  Yohji Maruyama ,  Noriyuki Saiki ,  Hiromi Shiina

IPC分类号： G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3912 ,  G11B5/3967

摘要： Embodiments of the present invention provide a magnetic shield composed of size-controlled small crystal grains and provide a more after-write read noise free thin film magnetic head. According to one embodiment of the present invention, an upper magnetic shield uses a multi-layered magnetic film formed by alternately stacking a face-centered cubic (fcc) crystalline magnetic thin layer and a body-centered cubic (bcc) crystalline magnetic thin layer by plating. The plating bath is such that the temperature is 30±1° C., pH is about 2.0−1.0 to 2.0+0.5, metal ion concentrations are about 5 to 25 (g/l) for Ni2+ and 5 to 15 (g/l) for Fe2+, saccharin sodium concentration is about 1.5±1.0 (g/l), sodium chloride concentration is about 25±5 (g/l), and boric acid concentration is about 25±5 (g/l). Each layer's crystal structure is different from that of its upper and lower layers, which results in size-controlled small crystal grains since the epitaxial growth is broken. Since crystal grains are reduced in size, it is possible to suppress the after-write read noise and therefore attain a read head which allows recording at higher frequencies.

摘要翻译： 本发明的实施例提供一种由尺寸控制的小晶粒组成的磁屏蔽，并提供更多的后写入无噪声薄膜磁头。 根据本发明的一个实施例，上磁屏蔽使用通过交替层叠面心立方（fcc）结晶磁性薄膜和体心立方（bcc）结晶磁性薄膜而形成的多层磁性膜， 电镀。 电镀浴温度为30±1℃，pH为约2.0-1.0〜2.0 + 0.5，Ni2 +和5〜15（g / l）的金属离子浓度约为5〜25（g / l） ）对于Fe2 +，糖精钠浓度约为1.5±1.0（g / l），氯化钠浓度约为25±5（g / l），硼酸浓度约为25±5（g / l）。 每层的晶体结构与其上层和下层的晶体结构不同，这导致尺寸控制的小晶粒，因为外延生长破裂。 由于晶粒尺寸减小，因此可以抑制写入后的读取噪声，从而获得允许以较高频率记录的读取头。

公开(公告)号：US20110141615A1

公开(公告)日：2011-06-16

申请号：US12965277

申请日：2010-12-10

申请人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Shouji Tokutake ,  Tetsuya Okai

发明人： Kazue Kudo ,  Hiromi Shiina ,  Yohji Maruyama ,  Shouji Tokutake ,  Tetsuya Okai

IPC分类号： G11B21/02 ,  G11B5/33

CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/6005 ,  Y10T428/11 ,  Y10T428/1171

摘要： According to one embodiment, a magnetic head for perpendicular recording includes a main pole, a first soft magnetic film disposed on a trailing side of the main pole, and a first nonmagnetic film interposed between the main pole and the first soft magnetic film. A thickness of the main pole is increased in a depth direction from an air bearing surface using an inclination, and a thickness of the first nonmagnetic film increases in the depth direction from the air bearing surface. In another embodiment, an angle from a horizontal plane of an upper surface of the first nonmagnetic film is greater than an angle from a horizontal plane of a lower surface of the first nonmagnetic film in contact with the main pole. Other heads, methods, and systems are described according to more embodiments.

摘要翻译： 根据一个实施例，用于垂直记录的磁头包括主极，设置在主极的后侧的第一软磁膜和插在主极和第一软磁膜之间的第一非磁性膜。 主轴的厚度使用倾斜从空气轴承面在深度方向上增大，第一非磁性膜的厚度在空气轴承面的深度方向上增大。 在另一个实施例中，与第一非磁性膜的上表面的水平面的角度大于与主极接触的第一非磁性膜的下表面的水平面的角度。 根据更多实施例描述其它头，方法和系统。

公开(公告)号：US20110002063A1

公开(公告)日：2011-01-06

申请号：US12827999

申请日：2010-06-30

申请人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

发明人： Yohji Maruyama ,  Tadayuki Iwakura ,  Tetsuya Okai ,  Hiromi Shiina ,  Kazue Kudo

IPC分类号： G11B21/02 ,  G11B5/33

CPC分类号： G11B5/3116 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

摘要： According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole having a trailing side and two lateral sides, a magnetic shield near the trailing side and both lateral sides of the main magnetic pole, the magnetic shield comprising: a first soft magnetic film with a relatively high saturation flux density positioned facing depthwise from a floating surface side thereof, a second soft magnetic film with a relatively low saturation flux density, and a first non-magnetic film. The head also includes a non-magnetic film interposed between the magnetic shield and the main magnetic pole, a first magnetic film magnetically coupled to the magnetic shield and the main magnetic pole on a side opposite a floating surface side thereof, and a coil surrounding a magnetic circuit, the magnetic circuit comprising the main magnetic pole and the first magnetic film. Other systems and methods are also described.

摘要翻译： 根据一个实施例，垂直磁记录头包括具有后侧和两个侧面的主磁极，靠近主磁极的后侧和两侧的磁屏蔽，磁屏蔽包括：第一软磁 具有从其浮动表面侧朝向深度方向定位的相对较高的饱和磁通密度的膜，具有相对低的饱和磁通密度的第二软磁膜和第一非磁性膜。 头部还包括插入在磁屏蔽和主磁极之间的非磁性膜，磁性地耦合到磁屏蔽的第一磁性膜和与其浮动表面侧相对的一侧的主磁极，以及围绕 所述磁路包括所述主磁极和所述第一磁性膜。 还描述了其它系统和方法。