公开(公告)号：US4816933A

公开(公告)日：1989-03-28

申请号：US789842

申请日：1985-10-21

Applicant: Toshiaki Izumi ,  Kiyoshi Noguchi ,  Hisae Shimizu ,  Misao Kohmoto

Inventor： Toshiaki Izumi ,  Kiyoshi Noguchi ,  Hisae Shimizu ,  Misao Kohmoto

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

CPC classification number: G11B5/7325 ,  G11B5/00 ,  G11B5/656 ,  G11B5/74 ,  G11B5/85 ,  Y10S428/90

Abstract: 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.

Abstract translation: 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

Applicant: Kiyoshi Noguchi ,  Koji Kobayashi ,  Suguru Takayama

Inventor： Kiyoshi Noguchi ,  Koji Kobayashi ,  Suguru Takayama

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

CPC classification number: G11B5/73 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/24967 ,  Y10T428/24975 ,  Y10T428/265

Abstract: 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.

Abstract translation: 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

Applicant: Koji Kobayashi ,  Kiyoshi Noguchi ,  Suguru Takayama

Inventor： Koji Kobayashi ,  Kiyoshi Noguchi ,  Suguru Takayama

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

CPC classification number: C23C14/226 ,  G11B5/64 ,  G11B5/85 ,  H01F41/16 ,  Y10S205/922

Abstract: 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.

Abstract translation: 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：US08872514B2

公开(公告)日：2014-10-28

申请号：US13017707

申请日：2011-01-31

Applicant: Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

Inventor： Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

IPC: G01R33/02 ,  G11B5/33 ,  G01R33/09 ,  B82Y25/00 ,  G01R33/12

CPC classification number: G01R33/1284 ,  B82Y25/00 ,  G01R33/093

Abstract: A magnetic sensor comprises a first ferromagnetic body, a second ferromagnetic body, a channel extending from the first ferromagnetic body to the second ferromagnetic body, a magnetic shield covering the channel, and an insulating film disposed between the channel and the magnetic shield, while the magnetic shield has a through-hole extending toward the channel.

Abstract translation: 磁传感器包括第一铁磁体，第二铁磁体，从第一铁磁体延伸到第二铁磁体的通道，覆盖通道的磁屏蔽以及设置在通道和磁屏蔽之间的绝缘膜，而 磁屏蔽件具有朝向通道延伸的通孔。

公开(公告)号：US08488282B2

公开(公告)日：2013-07-16

申请号：US13017935

申请日：2011-01-31

Applicant: Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

Inventor： Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

IPC: G11B5/33

CPC classification number: G01R33/1284 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3909 ,  G11B2005/3996

Abstract: A magnetic sensor comprises a channel, a ferromagnetic body and first and second reference electrodes on the channel, a magnetic shield covering a part of the channel opposing the ferromagnetic body, and an insulating film disposed between the channel and the magnetic shield, while the magnetic shield has a through-hole extending toward the part of the channel opposing the ferromagnetic body.

Abstract translation: 磁传感器包括通道，铁磁体和通道上的第一和第二参考电极，覆盖与铁磁体相对的通道的一部分的磁屏蔽以及设置在通道和磁屏蔽之间的绝缘膜，而磁性传感器 屏蔽件具有朝向与铁磁体相对的通道的部分延伸的通孔。

公开(公告)号：US08426929B2

公开(公告)日：2013-04-23

申请号：US13396062

申请日：2012-02-14

Applicant: Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

Inventor： Tomoyuki Sasaki ,  Tohru Oikawa ,  Kiyoshi Noguchi

IPC: H01L27/14

CPC classification number: H01L43/10 ,  H01L43/08 ,  H01L43/12

Abstract: The magnetic sensor includes a base substrate having a magnetic shield layer; a single-domain semiconductor crystal layer attached via an insulating film on the magnetic shield layer of the base substrate; a first ferromagnetic layer formed on top of the semiconductor crystal layer on the opposite side of the semiconductor crystal layer to the insulating film, via a first tunnel barrier layer; and a second ferromagnetic layer formed, at a distance from the first ferromagnetic layer, on top of the semiconductor crystal layer on the opposite side of the semiconductor crystal layer to the insulating film, via a second tunnel barrier layer.

Abstract translation: 磁传感器包括具有磁屏蔽层的基底基板; 通过绝缘膜附着在基底基板的磁屏蔽层上的单畴半导体晶体层; 经由第一隧道势垒层在所述半导体晶体层的与所述绝缘膜相对的所述半导体晶体层的顶部上形成的第一铁磁层; 以及第二铁磁层，其经由第二隧道势垒层与半导体晶体层的与绝缘膜相隔一定距离的第一铁磁层一定距离形成。

公开(公告)号：US08264916B1

公开(公告)日：2012-09-11

申请号：US13045603

申请日：2011-03-11

Applicant: Tsutomu Aoyama ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

Inventor： Tsutomu Aoyama ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Kiyoshi Noguchi ,  Isamu Sato

IPC: G11B11/00 ,  G11B27/36

CPC classification number: G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

Abstract: A microwave assisted magnetic head of the present invention includes: at least two or more auxiliary coils that are arranged in a periphery of a writing main pole; and microwave current supply means that applies microwave currents to the at least two or more auxiliary coils. The at least two or more auxiliary coils respectively include linear body parts linearly arranged on an ABS side, two of the linear body parts of the at least two or more auxiliary coils are arranged in a substantially orthogonal positional relationship, and the microwave current supply means is configured such that the microwave current supply means changes phase differences of the microwave currents applied respectively to the at least two or more auxiliary coils. Therefore, the microwave current can be easily controlled, and thus, a circularly polarized magnetic field with high magnetization inversion efficiency can be generated as an assistance magnetic field.

Abstract translation: 本发明的微波辅助磁头包括：布置在书写主极的周边中的至少两个或更多个辅助线圈; 以及微波电流供给装置，其向所述至少两个或更多个辅助线圈施加微波电流。 所述至少两个以上的辅助线圈分别包括直线状配置在ABS侧的线状体部，所述至少两个以上的辅助线圈的线状体部的两个以大致正交的位置关系配置，微波电流供给装置 被配置为使得微波电流提供装置改变分别施加到至少两个或更多个辅助线圈的微波电流的相位差。 因此，可以容易地控制微波电流，因此可以产生具有高磁化反转效率的圆极化磁场作为辅助磁场。

公开(公告)号：US08184395B2

公开(公告)日：2012-05-22

申请号：US12470150

申请日：2009-05-21

Applicant: Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

Inventor： Hiroshi Ikeda ,  Saori Kajihara ,  Kiyoshi Noguchi ,  Isamu Sato

IPC: G11B5/012

CPC classification number: B82Y10/00 ,  B82Y25/00 ,  G11B5/3967 ,  G11B25/043 ,  G11B33/08 ,  G11B2005/001 ,  G11B2005/0024 ,  G11B2005/3996

Abstract: A magnetic recording and reproducing apparatus includes a metal housing, a magnetic recording medium having a magnetic recording layer, and a thin-film magnetic head having a write magnetic field production unit and a resonance magnetic field production unit. The apparatus further includes a write signal generation unit for generating the write signal, a microwave signal generation unit for generating the microwave excitation signal, a transmission unit for feeding the microwave excitation signal to the resonance magnetic field production unit and for feeding the write signal to the write magnetic field production unit, and a plurality of metal ribs, arranged in the metal housing, for forming a plurality of cavities. Each of the plurality of cavities having a rectangular horizontal section shape and having dimensions to produce no resonance at a frequency of the microwave excitation signal.

Abstract translation: 磁记录和再现装置包括金属外壳，具有磁记录层的磁记录介质和具有写入磁场产生单元和共振磁场产生单元的薄膜磁头。 该装置还包括用于产生写入信号的写入信号产生单元，用于产生微波激励信号的微波信号产生单元，用于将微波激励信号馈送到谐振磁场产生单元并用于将写入信号馈送到 写入磁场产生单元和布置在金属外壳中的多个金属肋，用于形成多个空腔。 多个空腔中的每一个具有矩形水平截面形状并且具有在微波激发信号的频率下不产生谐振的尺寸。

公开(公告)号：US08000063B2

公开(公告)日：2011-08-16

申请号：US11623493

申请日：2007-01-16

Applicant: Atsushi Yamaguchi ,  Kei Hirata ,  Satoshi Miura ,  Yoshihiro Tsuchiya ,  Kiyoshi Noguchi

Inventor： Atsushi Yamaguchi ,  Kei Hirata ,  Satoshi Miura ,  Yoshihiro Tsuchiya ,  Kiyoshi Noguchi

IPC: G11B5/39

CPC classification number: G11B5/3967 ,  G11B5/11 ,  G11B5/3912

Abstract: A magneto-resistive element includes a lower magnetic shield film and a magneto-resistive film disposed above the lower magnetic shield film. The lower magnetic shield film includes a lower shield layer and an upper shield layer. The upper shield layer is amorphous or microcrystalline, made of a NiFe or CoFe composition containing B or P, and deposited on the lower shield layer. The lower shield layer is a magnetic conductive layer which is amorphous or microcrystalline with a crystal grain size equal to or less than 20 nm.

Abstract translation: 磁阻元件包括下磁屏蔽膜和设置在下磁屏蔽膜上方的磁阻膜。 下磁屏蔽膜包括下屏蔽层和上屏蔽层。 上屏蔽层是无定形或微晶的，由含有B或P的NiFe或CoFe组合物制成并沉积在下屏蔽层上。 下屏蔽层是晶体尺寸等于或小于20nm的非晶或微晶的导电层。

公开(公告)号：US07558027B2

公开(公告)日：2009-07-07

申请号：US11411107

申请日：2006-04-26

Applicant: Kei Hirata ,  Takahiko Machita ,  Koji Shimazawa ,  Kiyoshi Noguchi

Inventor： Kei Hirata ,  Takahiko Machita ,  Koji Shimazawa ,  Kiyoshi Noguchi

IPC: G11B5/127

CPC classification number: G11B5/3912 ,  B82Y10/00 ,  G11B5/3909 ,  G11B5/3929 ,  G11B2005/3996

Abstract: A magnetic field sensor comprises: a magnetic field detecting element that detects magnitude of an external magnetic field based on electric resistance of the magnetic field detecting element to sense current, the electric resistance being varied in accordance with the external magnetic field; an upper shield layer that is formed to cover the magnetic field detecting element; and a protective layer that is formed above the upper shield layer with respect to a direction of stacking. The upper shield layer includes a first portion at least part of which covers a top surface of the magnetic field detecting element, and a second portion that covers the first portion, and, the first portion has a larger absolute value of magnetostriction than the second portion.

Abstract translation: 磁场传感器包括：磁场检测元件，其基于磁场检测元件的电阻来检测外部磁场的大小以感测电流，电阻根据外部磁场而变化; 形成为覆盖所述磁场检测元件的上屏蔽层; 以及相对于堆叠方向形成在上屏蔽层上方的保护层。 上屏蔽层包括其至少一部分覆盖磁场检测元件的顶表面的第一部分和覆盖第一部分的第二部分，并且第一部分具有比第二部分更大的磁致伸缩绝对值 。