公开(公告)号：US08351156B2

公开(公告)日：2013-01-08

申请号：US12638911

申请日：2009-12-15

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

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

IPC分类号： G11B5/127 ,  G11B5/187

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the depths of the first magnetic films from an air bearing surface are smaller than the depth of the second magnetic film from the air bearing surface at least at a periphery of the main pole. A perpendicular magnetic recording head according to another embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the main pole and the first magnetic films have respective tapered portions whose thicknesses become larger toward the side opposite to an air bearing surface, and the tapered portions are in contact with the second magnetic film. Additional embodiments are also presented.

摘要翻译： 根据一个实施例的垂直磁记录头包括主极; 通过非磁性膜在磁道宽度方向上布置在主极两侧的第一磁膜; 以及通过非磁性膜布置在所述主极的后侧的第二磁性膜; 其中来自空气支承表面的第一磁性膜的深度至少在主极的周边处小于来自空气支承表面的第二磁性膜的深度。 根据另一实施例的垂直磁记录头包括主极; 通过非磁性膜在磁道宽度方向上布置在主极两侧的第一磁膜; 以及通过非磁性膜布置在所述主极的后侧的第二磁性膜; 其中，所述主极和所述第一磁性膜具有各自的锥形部分，所述锥形部分的厚度朝着与空气支承表面相对的一侧变大，并且所述锥形部分与所述第二磁性膜接触。 还提供了另外的实施例。

公开(公告)号：US07842408B2

公开(公告)日：2010-11-30

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，因此可以降低较高频率下的磁导率μ的降低。

公开(公告)号：US20080002308A1

公开(公告)日：2008-01-03

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： G11B5/127

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，Ni 2+ / SUP的金属离子浓度约为5〜25（g / l） > 5〜15（g / l），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：US20050063097A1

公开(公告)日：2005-03-24

申请号：US10961035

申请日：2004-10-12

申请人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

发明人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

IPC分类号： G11B5/60 ,  G11B5/48

CPC分类号： G11B5/486 ,  G11B5/484

摘要： Magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz, a magnetic head having at least a recording device to a magnetic recording medium, and also the electric wiring corresponding to a recording current supplying device to this magnetic head are formed on a suspension member for mechanically suspending the magnetic head, the recording current being supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

摘要翻译： 磁盘装置包括能够满足高于或等于200MHz的高频记录的电气条件的电线，至少具有至磁记录介质的记录装置的磁头以及对应于记录的电线 该磁头的电流供给装置形成在用于机械地悬挂磁头的悬挂构件上，记录电流通过采用这种电线被提供给磁头记录装置，其特性阻抗高于该磁头的最大阻抗 磁头记录装置。

公开(公告)号：US06661613B2

公开(公告)日：2003-12-09

申请号：US10318114

申请日：2002-12-13

申请人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

发明人： Yohji Maruyama ,  Hiroshi Ikekame ,  Hisashi Takano

IPC分类号： G11B555

CPC分类号： G11B5/486 ,  G11B5/484

摘要： Magnetic disk apparatus includes an electric wiring capable of satisfying an electric condition under which high frequency recording higher than or equal to 200 MHz, a magnetic head having at least a recording device to a magnetic recording medium, and also the electric wiring corresponding to a recording current supplying device to this magnetic head are formed on a suspension member for mechanically suspending the magnetic head, the recording current being supplied to a magnetic head recording device by employing such electric wiring, the characteristic impedance of which is higher than a maximum impedance of the magnetic head recording device.

公开(公告)号：US06560168B1

公开(公告)日：2003-05-06

申请号：US09719427

申请日：2000-12-12

申请人： Hideki Saga ,  Hiroaki Nemoto ,  Hirofumi Sukeda ,  Masahiko Takahashi ,  Kimio Nakamura ,  Yohji Maruyama ,  Hiroshi Ide ,  Takehiko Hamaguchi

发明人： Hideki Saga ,  Hiroaki Nemoto ,  Hirofumi Sukeda ,  Masahiko Takahashi ,  Kimio Nakamura ,  Yohji Maruyama ,  Hiroshi Ide ,  Takehiko Hamaguchi

IPC分类号： G11B1100

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/398 ,  G11B5/5552 ,  G11B5/59683 ,  G11B5/74 ,  G11B5/82 ,  G11B11/1053 ,  G11B11/10532 ,  G11B11/10541 ,  G11B11/10554 ,  G11B11/10576 ,  G11B11/1058 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0016 ,  G11B2005/0021 ,  G11B2005/3996

摘要： An information recording apparatus using a recording medium which holds information by reversed magnetic domains on a perpendicular magnetic recording film includes an irradiation unit for applying electromagnetic energy or light onto the recording medium, and a magnetic flux detection unit for detecting magnetic leakage flux emerging from the recording medium, the magnetic flux detection unit being disposed on the same side as the irradiation unit with respect to the recording medium. As a result, both side recording of the recording medium can be conducted.

摘要翻译： 使用记录介质的信息记录装置，其用垂直磁记录膜上的反向磁畴保持信息，包括用于向记录介质施加电磁能或光的照射单元，以及磁通检测单元，用于检测从 记录介质，磁通检测单元相对于记录介质设置在与照射单元相同的一侧。 结果，可以进行记录介质的双面记录。

公开(公告)号：US5898540A

公开(公告)日：1999-04-27

申请号：US650196

申请日：1996-05-20

申请人： Yohji Maruyama ,  Makoto Aihara

发明人： Yohji Maruyama ,  Makoto Aihara

IPC分类号： G11B5/60 ,  G11B5/64

CPC分类号： G11B5/6005 ,  G11B5/64

摘要： A magnetic storage apparatus includes a magnetic head having sliding front and rear pads on its sliding surface. The front pads are tapered toward their front ends and the height of the front pads are higher than the height of the rear pad. The tapered front pads are coated with a thin film. The magnetic pad is provided with a total of three pads, two pads on its front side and one pad on its rear side. The sum area of the pads is within a range of 0.0003 to 0.02 mm.sup.2. A recording and reproducing operation is performed with the front pads and the rear pad concurrently kept in contact sliding with the surface of a recording medium. A reliable contact sliding is thus performed with the pads kept in contact with the recording medium. The magnetic head reliably operates with its recording and reproducing component kept in close vicinity with the recording medium. Therefore, a reliable magnetic head and a magnetic storage apparatus employing it are provided.

摘要翻译： 磁性存储装置包括在其滑动表面上具有滑动的前垫和后垫的磁头。 前垫朝向其前端逐渐变细，前垫的高度高于后垫的高度。 锥形前垫用薄膜涂覆。 磁垫设置有三个焊盘，其前侧有两个焊盘，其背面有一个焊盘。 垫的总面积在0.0003〜0.02mm 2的范围内。 执行记录和再现操作，其中前垫和后垫同时保持与记录介质的表面接触滑动。 因此，垫与保持与记录介质接触的可靠接触滑动。 磁头可靠地操作，其记录和再现部件与记录介质紧密相连。 因此，提供了可靠的磁头和采用它的磁存储装置。

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：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：US20120120528A1

公开(公告)日：2012-05-17

申请号：US12947796

申请日：2010-11-16

申请人： Masaru Furukawa ,  Yuki Shimizu ,  Junguo Xu ,  Yohji Maruyama ,  Takayoshi Ohtsu ,  Toshiya Shiramatsu

发明人： Masaru Furukawa ,  Yuki Shimizu ,  Junguo Xu ,  Yohji Maruyama ,  Takayoshi Ohtsu ,  Toshiya Shiramatsu

IPC分类号： G11B5/48

CPC分类号： G11B5/255 ,  G11B5/3106 ,  G11B5/314 ,  G11B5/40 ,  G11B5/6076

摘要： A slider comprising a contact sensor element configured to respond to a change in resistance due to a change in temperature, and a shield structure. The shield structure comprises a lower thermal conductivity than the contact sensor element and a greater hardness than the contact sensor element.

摘要翻译： 一种滑动件，包括接触传感器元件，其被配置为响应由于温度变化引起的电阻变化，以及屏蔽结构。 屏蔽结构包括比接触传感器元件更低的热导率并且具有比接触传感器元件更大的硬度。