公开(公告)号：US20050195526A1

公开(公告)日：2005-09-08

申请号：US11068967

申请日：2005-03-02

申请人： Hiraku Hirabayashi ,  Kiyoshi Noguchi ,  Taro Oike ,  Shin Narushima ,  Takamitsu Sakamoto

发明人： Hiraku Hirabayashi ,  Kiyoshi Noguchi ,  Taro Oike ,  Shin Narushima ,  Takamitsu Sakamoto

IPC分类号： G11B5/31 ,  G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278

摘要： The present invention is intended for a thin film magnetic head which can provide reduction in the excess magnetostatic leakage field even if the flare point is set near to the ABS in order to generate a sufficient recording magnetic field and which can assure stable overwrite characteristics even if there are variations in upper pole portion patterns. The pole end portion 223 has a width W11 to define a recording track width. The pole rear portion 222 has one end which is magnetically connected with the pole end portion 223 at or in the vicinity of an edge portion of an insulating film 273 and defines a first flare point FP1, the other end which is connected with the upper yoke portion 221 and defines a second flare point FP2, and both side edges in the track width direction which are inclined so that the width in the track width direction gradually increases from the second flare point FP2 toward the first flare point FP1. The width W11 of the pole end portion 223 at the first flare point FP1 is smaller than the maximum width W21 of the pole rear portion 222.

摘要翻译： 本发明的目的在于一种薄膜磁头，即使将扩张点设置在靠近ABS的情况下也能够提供过剩的静磁泄漏场，以产生足够的记录磁场，即使在 上极部分图形有变化。 极端部223具有宽度W 11，以限定记录轨道宽度。 极后部222的一端在绝缘膜273的边缘部分处或附近与极端部223磁性连接，并且限定第一扩口点FP1，另一端与上端 轭部221，并且限定第二扩张点FP 2，以及轨道宽度方向上的两个侧边缘，其倾斜，使得轨道宽度方向上的宽度从第二扩张点FP 2朝向第一扩张点FP 1逐渐增加。 第一点火点FP 1的极端部223的宽度W 11比极后部222的最大宽度W 21小。

公开(公告)号：US20050057851A1

公开(公告)日：2005-03-17

申请号：US10917476

申请日：2004-08-13

申请人： Taro Oike ,  Kiyoshi Noguchi ,  Shin Narushima ,  Takamitsu Sakamoto ,  Hiraku Hirabayashi

发明人： Taro Oike ,  Kiyoshi Noguchi ,  Shin Narushima ,  Takamitsu Sakamoto ,  Hiraku Hirabayashi

IPC分类号： G11B5/127 ,  G11B5/31

CPC分类号： G11B5/3163 ,  G11B5/3116 ,  Y10T29/49021

摘要： A thin-film magnetic head includes a lower magnetic layer, an upper magnetic layer, a recording gap layer, and a thin-film coil. The lower magnetic layer has a first magnetic pole tip layer, and a first yoke layer which is connected to the first magnetic pole tip layer. The first yoke layer has an extended part which is relatively thick and a reduced part which is relatively thin in the area in which the first yoke layer confronts the first magnetic pole tip layer, the extended part being positioned on the side of the air bearing surface. Further, the first magnetic pole tip layer is connected to the first yoke layer at the extended part, and is insulated from the first yoke layer at the reduced part.

摘要翻译： 薄膜磁头包括下磁性层，上磁性层，记录间隙层和薄膜线圈。 下磁性层具有第一磁极尖端层和与第一磁极尖端层连接的第一磁轭层。 第一磁轭层具有相对较厚的延伸部分和在第一磁轭层面对第一磁极末端层的区域中较薄的部分，延伸部分位于空气轴承表面侧 。 此外，第一磁极尖端层在延伸部分处连接到第一磁轭层，并且在缩小部分处与第一磁轭层绝缘。

公开(公告)号：US4816933A

公开(公告)日：1989-03-28

申请号：US789842

申请日：1985-10-21

申请人： Toshiaki Izumi ,  Kiyoshi Noguchi ,  Hisae Shimizu ,  Misao Kohmoto

发明人： Toshiaki Izumi ,  Kiyoshi Noguchi ,  Hisae Shimizu ,  Misao Kohmoto

IPC分类号： G11B5/00 ,  G11B5/64 ,  G11B5/73 ,  G11B5/74 ,  G11B5/85 ,  G11B5/02

CPC分类号： G11B5/7325 ,  G11B5/00 ,  G11B5/656 ,  G11B5/74 ,  G11B5/85 ,  Y10S428/90

摘要： A magnetic recording medium is provided comprising a flexible substrate and a ferromagnetic metal thin film layer on the substrate primarily comprising cobalt. When coercive force is measured by changing the measuring direction in a plane defined by a longitudinal direction of the substrate and a direction normal to the major surface of the substrate, the following relationship is met:(Hc.sub.max -Hc.sub.min)/Hc(O).ltoreq.0.9where Hc.sub.max is the maximum of the coercive force, Hc.sub.min is the minimum of the coercive force, and Hc(O) is a coercive force in the longitudinal direction of the substrate. The medium has in average at least 10.sup.5 /a.sup.2 protrusions per square millimeter of the surface, the protrusions having a height of 30 to 300 .ANG., where a is the distance as expressed in .mu.m of a gap in a magnetic head across which the medium is passed for recording and reproducing operation. The filling ratio of the ferromagnetic metal thin film layer is at least 0.7.

摘要翻译： 提供了一种磁记录介质，其包括柔性基底和主要包含钴的基底上的强磁性金属薄膜层。 通过在由基板的纵向和垂直于基板的主表面的方向限定的平面中改变测量方向来测量矫顽力时，满足以下关系：（Hcmax-Hcmin）/ Hc（O） /=0.9其中Hcmax是矫顽力的最大值，Hcmin是矫顽力的最小值，Hc（O）是衬底纵向上的矫顽力。 介质平均每平方毫米表面至少有105 / a2个突起，突起的高度为30至300安培，其中a为磁头间隙的距离，以m为单位， 通过记录和再现操作。 强磁性金属薄膜层的填充率为0.7以上。

公开(公告)号：US4596735A

公开(公告)日：1986-06-24

申请号：US603894

申请日：1984-04-25

申请人： Kiyoshi Noguchi ,  Koji Kobayashi ,  Suguru Takayama

发明人： Kiyoshi Noguchi ,  Koji Kobayashi ,  Suguru Takayama

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/72 ,  G11B5/73 ,  G11B5/85

CPC分类号： G11B5/73 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/265

摘要： In a magnetic recording medium comprising a non-magnetic substrate and a magnetic layer of Co or Co-Ni in the form of a continuous thin film on the substrate, the magnetic layer has oxygen-rich sub-layers at its surfaces adjacent to and remote from the substrate. The oxygen-rich sub-layers are produced by injecting energy particles containing oxygen to the surface of the substrate during the initial and final stages of formation of the magnetic layer.

摘要翻译： 在包括非磁性基板和在基板上呈连续薄膜形式的Co或Co-Ni的磁性层的磁记录介质中，磁性层在其邻近和远离的表面上具有富氧子层 从底物。 在形成磁性层的初始阶段和最后阶段期间，通过将含有氧的能量粒子注入到衬底的表面来产生富氧子层。

公开(公告)号：US4540600A

公开(公告)日：1985-09-10

申请号：US588890

申请日：1984-03-12

申请人： Koji Kobayashi ,  Kiyoshi Noguchi ,  Suguru Takayama

发明人： Koji Kobayashi ,  Kiyoshi Noguchi ,  Suguru Takayama

IPC分类号： C23C14/22 ,  G11B5/64 ,  G11B5/65 ,  G11B5/72 ,  G11B5/73 ,  G11B5/85 ,  H01F41/16

CPC分类号： C23C14/226 ,  G11B5/64 ,  G11B5/85 ,  H01F41/16 ,  Y10S205/922

摘要： A process for producing a magnetic recording medium which comprises forming on a non-magnetic substrate a magnetic thin layer composed of columnar crystal particles comprising Co, or Co and Ni and/or Cr by vapor/depositing the metal atoms at an angle of incidence of at least 20.degree. relative to the normal line of the principal plane of the substrate, and then forcibly oxidizing the magnetic thin layer by electrochemical treatment to form an oxide layer on the surface of the columnar crystal particles of the magnetic thin layer, and thereby to form a magnetic layer.

摘要翻译： 一种磁记录介质的制造方法，其特征在于，在非磁性基板上形成由包含Co，或Co，Ni和/或Cr的柱状结晶粒子构成的磁性薄膜，所述磁性薄膜由蒸气/沉积金属原子以入射角 相对于基板的主面的法线为至少20°，然后通过电化学处理强制氧化磁性薄层，以在磁性薄层的柱状结晶粒子的表面上形成氧化物层，从而 形成磁性层。

公开(公告)号：US08154828B2

公开(公告)日：2012-04-10

申请号：US12500835

申请日：2009-07-10

申请人： Yoshihiro Tsuchiya ,  Shinji Hara ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

发明人： Yoshihiro Tsuchiya ,  Shinji Hara ,  Kiyoshi Noguchi ,  Migaku Takahashi ,  Masakiyo Tsunoda

IPC分类号： G11B5/39

CPC分类号： G11B5/3929 ,  B82Y10/00 ,  B82Y25/00 ,  G11B2005/3996

摘要： An MR element in a CPP structure includes a spacer layer made of Cu, a magnetic pinned layer containing CoFe and a free layer containing CoFe that are laminated to sandwich the spacer layer. The free layer is located below the magnetic pinned layer. The free layer is oriented in a (001) crystal plane, the spacer layer is formed and oriented in a (001) crystal plane on the (001) crystal plane of the free layer. Therefore, in a low resistance area where an area resistivity (AR) of the MR element is, for example, lower than 0.3 Ω·μm2, an MR element that has a large variation of a resistance is obtained.

摘要翻译： CPP结构中的MR元件包括由Cu制成的间隔层，包含CoFe的磁性固定层和层压以夹持间隔层的CoFe的自由层。 自由层位于磁性固定层的下方。 自由层在（001）晶面取向，间隔层形成并定向在自由层的（001）晶面上的（001）晶面上。 因此，在MR元件的面积电阻率（AR）例如低于0.3

公开(公告)号：US20110242696A1

公开(公告)日：2011-10-06

申请号：US12750870

申请日：2010-03-31

申请人： Hiroshi IKEDA ,  Isamu Sato ,  Kiyoshi Noguchi ,  Tsutomu Aoyama ,  Takuya Adachi

发明人： Hiroshi IKEDA ,  Isamu Sato ,  Kiyoshi Noguchi ,  Tsutomu Aoyama ,  Takuya Adachi

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

摘要： A gap between a main pole and auxiliary pole composing a thin film magnetic head having a microwave assisted function of the present invention is filled with a nonmagnetic dielectric layer to embed a microwave radiator. The nonmagnetic dielectric layer has an inclined surface at a end on a side of an opposing medium surface by which the microwave radiated from the microwave radiator to be bent toward the main pole, whereby the microwave magnetic field generated from the microwave generator can be gathered immediately below the main pole, further improving the microwave assisted effect.

摘要翻译： 构成本发明的具有微波辅助功能的薄膜磁头的主极和辅助极之间的间隙填充有非磁性介电层以嵌入微波辐射器。 非磁性介电层在相对的介质表面的一侧的端部具有倾斜表面，微波从微波辐射器辐射到微波辐射器，从而微波发生器产生的微波磁场可以立即收集 主杆下方进一步提高微波辅助效果。

公开(公告)号：US07876534B2

公开(公告)日：2011-01-25

申请号：US12014575

申请日：2008-01-15

申请人： Tsutomu Chou ,  Yoshihiro Tsuchiya ,  Daisuke Miyauchi ,  Kiyoshi Noguchi

发明人： Tsutomu Chou ,  Yoshihiro Tsuchiya ,  Daisuke Miyauchi ,  Kiyoshi Noguchi

IPC分类号： G11B5/11 ,  G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3912 ,  G11B5/3932 ,  G11B2005/3996

摘要： A magnetoresistive device comprising a magnetoresistive unit, an upper shield layer and a lower shield layer stacked such that the magnetoresistive unit is held between them. The magnetoresistive unit comprises a nonmagnetic metal intermediate layer, a first ferromagnetic layer and a second ferromagnetic layer stacked with the nonmagnetic metal intermediate layer in the middle. When no bias magnetic field is applied, the first and second ferromagnetic layers have mutually antiparallel magnetizations. The magnetoresistive unit further comprises first and second side shield layers, and first and second biasing layers located to be magnetically coupled to the first and second side shield layers, wherein magnetic fluxes fed from the bias magnetic fields pass through the first and second side shield layers positioned in proximity to the magnetoresistive unit such that the magnetizations of the first and second ferromagnetic layers become substantially orthogonal to each other.

摘要翻译： 磁阻器件包括磁阻单元，上屏蔽层和下屏蔽层，以使磁阻单元保持在它们之间。 磁阻单元包括在中间与非磁性金属中间层堆叠的非磁性金属中间层，第一铁磁层和第二铁磁层。 当不施加偏置磁场时，第一和第二铁磁层具有相互反平行的磁化。 磁阻单元还包括第一和第二侧屏蔽层，以及第一和第二偏置层，其被定位成磁耦合到第一和第二侧屏蔽层，其中从偏置磁场馈送的磁通量通过第一和第二侧屏蔽层 位于磁阻单元附近，使得第一和第二铁磁层的磁化基本上彼此正交。

公开(公告)号：US20100073804A1

公开(公告)日：2010-03-25

申请号：US12550662

申请日：2009-08-31

申请人： Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

发明人： Hiroshi Ikeda ,  Kiyoshi Noguchi ,  Saori Kajihara ,  Isamu Sato

IPC分类号： G11B5/02

CPC分类号： G11B5/1278 ,  G11B2005/001 ,  G11B2005/0024

摘要： A thin-film magnetic head having microwave magnetic exciting function includes a write magnetic field production means for producing, in response to a write signal, a write magnetic field to be applied into a magnetic recording medium, and at least line conductor of a microwave radiator of a plane-structure type, formed independent from the write magnetic field production means, for radiating, by feeding there through a microwave excitation current, a microwave band resonance magnetic field with a frequency equal to or in a range near a ferromagnetic resonance frequency FR of the magnetic recording medium.

摘要翻译： 具有微波磁激励功能的薄膜磁头包括写入磁场产生装置，用于响应于写入信号产生要施加到磁记录介质中的写入磁场，以及至少微波辐射器的线路导体 的平面结构型，与写入磁场产生装置无关，用于通过微波激励电流向其馈送频率等于或接近铁磁共振频率FR的频率的微波频带共振磁场 的磁记录介质。

公开(公告)号：US20090190270A1

公开(公告)日：2009-07-30

申请号：US12022538

申请日：2008-01-30

申请人： Tsutomu Chou ,  Yoshihiro Tsuchiya ,  Daisuke Miyauchi ,  Takahiko Machita ,  Shinji Hara ,  Tomohito Mizuno ,  Hironobu Matsuzawa ,  Toshiyuki Ayukawa ,  Koji Shimazawa ,  Kiyoshi Noguchi

发明人： Tsutomu Chou ,  Yoshihiro Tsuchiya ,  Daisuke Miyauchi ,  Takahiko Machita ,  Shinji Hara ,  Tomohito Mizuno ,  Hironobu Matsuzawa ,  Toshiyuki Ayukawa ,  Koji Shimazawa ,  Kiyoshi Noguchi

IPC分类号： G11B5/33

CPC分类号： G11B5/398 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3916 ,  G11B5/3932 ,  G11B5/3967

摘要： The invention provides a magnetoresistive device with the CPP (current perpendicular to plane) structure, comprising a nonmagnetic intermediate layer, and a first ferromagnetic layer and a second ferromagnetic layer stacked and formed with said nonmagnetic intermediate layer interposed between them, with a sense current applied in the stacking direction, wherein each of said first and second ferromagnetic layers comprises a sensor area joining to the nonmagnetic intermediate layer near a medium opposite plane and a magnetization direction control area that extends further rearward (toward the depth side) from the position of the rear end of said nonmagnetic intermediate layer; a magnetization direction control multilayer arrangement is interposed at an area where the magnetization direction control area for said first ferromagnetic layer is opposite to the magnetization direction control area for said second ferromagnetic layer in such a way that the magnetizations of the said first and second ferromagnetic layers are antiparallel with each other along the width direction axis; and said sensor area is provided at both width direction ends with biasing layers working such that the mutually antiparallel magnetizations of said first and second ferromagnetic layers intersect in substantially orthogonal directions. It is thus possible to obtain a magnetoresistive device that, while the magnetization directions of two magnetic layers (free layers) stay stabilized, can have high reliability, and can improve linear recording densities by the adoption of a structure capable of narrowing the read gap (the gap between the upper and lower shields) thereby meeting recent demands for ultra-high recording densities.

摘要翻译： 本发明提供了一种具有CPP（电流垂直于平面）结构的磁阻器件，包括非磁性中间层，并且第一铁磁层和第二铁磁层层叠并形成有介于它们之间的所述非磁性中间层，施加感应电流 其特征在于，所述第一和第二铁磁体层中的每一个包括与介质相对平面附近的非磁性中间层连接的传感器区域和从所述第一和第二铁磁层的位置向后延伸（朝向深度侧）的磁化方向控制区域 所述非磁性中间层的后端; 磁化方向控制多层布置被插入在所述第一铁磁层的磁化方向控制区域与所述第二铁磁层的磁化方向控制区域相反的区域处，使得所述第一和第二铁磁层的磁化 沿着宽度方向轴线彼此反平行; 并且所述传感器区域设置在两个宽度方向端，偏压层工作，使得所述第一和第二铁磁层的相互反平行磁化在大致正交的方向相交。 因此，可以获得在两个磁性层（自由层）的磁化方向保持稳定的同时可以具有高可靠性的磁阻器件，并且可以通过采用能够缩小读取间隙的结构来提高线性记录密度（ 上，下屏蔽之间的间隙），从而满足了对超高记录密度的最新要求。