公开(公告)号：US07773347B2

公开(公告)日：2010-08-10

申请号：US11723073

申请日：2007-03-16

申请人： Kazuhiko Maejima ,  Hiroshi Kamiyama ,  Tomonaga Nishikawa

发明人： Kazuhiko Maejima ,  Hiroshi Kamiyama ,  Tomonaga Nishikawa

IPC分类号： G11B5/39 ,  G11B5/29 ,  G11B5/40

CPC分类号： G11B5/3958 ,  G11B5/115 ,  G11B5/3912 ,  G11B5/40

摘要： A thin-film magnetic head has a plurality of MR read head elements. Each MR read head element includes shield layers electrically insulated from the ground. An electrical resistor layer is electrically connected between the shield layer of one of the plurality of MR read head elements and the shield layer of the other one of the plurality of MR read head elements.

摘要翻译： 薄膜磁头具有多个MR读取头元件。 每个MR读头元件包括与地电隔离的屏蔽层。 电阻层电连接在多个MR读取头元件中的一个的屏蔽层和多个MR读取头元件中的另一个的屏蔽层之间。

公开(公告)号：US20070230062A1

公开(公告)日：2007-10-04

申请号：US11723073

申请日：2007-03-16

申请人： Kazuhiko Maejima ,  Hiroshi Kamiyama ,  Tomonaga Nishikawa

发明人： Kazuhiko Maejima ,  Hiroshi Kamiyama ,  Tomonaga Nishikawa

IPC分类号： G11B5/33

CPC分类号： G11B5/3958 ,  G11B5/115 ,  G11B5/3912 ,  G11B5/40

摘要： A thin-film magnetic head has a plurality of MR read head elements. Each MR read head element includes shield layers electrically insulated from the ground. An electrical resistor layer is electrically connected between the shield layer of one of the plurality of MR read head elements and the shield layer of the other one of the plurality of MR read head elements.

摘要翻译： 薄膜磁头具有多个MR读取头元件。 每个MR读头元件包括与地电绝缘的屏蔽层。 电阻层电连接在多个MR读取头元件中的一个的屏蔽层和多个MR读取头元件中的另一个的屏蔽层之间。

公开(公告)号：US07791835B2

公开(公告)日：2010-09-07

申请号：US11772562

申请日：2007-07-02

申请人： Hiraku Hirabayashi ,  Kazuhiko Maejima ,  Tomonaga Nishikawa

发明人： Hiraku Hirabayashi ,  Kazuhiko Maejima ,  Tomonaga Nishikawa

IPC分类号： G11B5/31

CPC分类号： G11B5/3116 ,  G11B5/00826 ,  G11B5/29 ,  G11B5/3123 ,  G11B5/3967 ,  G11B5/3977

摘要： A multi-channel head includes a substrate and a plurality of recording elements arranged on the substrate in a track width direction. At least one of the recording elements satisfies BGW BGW, where PW represents a pole width, BGW and BGD represent a width and a depth, respectively, of a back yoke.

摘要翻译： 多通道头包括基板和沿轨道宽度方向布置在基板上的多个记录元件。 至少一个记录元件满足BGW BGW，其中PW表示极宽度，BGW和BGD分别表示后轭的宽度和深度。

公开(公告)号：US20080100961A1

公开(公告)日：2008-05-01

申请号：US11772562

申请日：2007-07-02

申请人： Hiraku Hirabayashi ,  Kazuhiko Maejima ,  Tomonaga Nishikawa

发明人： Hiraku Hirabayashi ,  Kazuhiko Maejima ,  Tomonaga Nishikawa

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/00826 ,  G11B5/29 ,  G11B5/3123 ,  G11B5/3967 ,  G11B5/3977

摘要： A multi-channel head includes a substrate and a plurality of recording elements arranged on the substrate in a track width direction. At least one of the recording elements satisfies BGW BGW, where PW represents a pole width, BGW and BGD represent a width and a depth, respectively, of a back yoke.

摘要翻译： 多通道头包括基板和沿轨道宽度方向布置在基板上的多个记录元件。 至少一个记录元件满足BGW BGW，其中PW表示极宽度，BGW和BGD分别表示后轭的宽度和深度。

公开(公告)号：US07724474B2

公开(公告)日：2010-05-25

申请号：US11497376

申请日：2006-08-02

申请人： Kazuhiko Maejima ,  Mitsuyoshi Kawai ,  Hiroki Matsukuma ,  Katsumichi Tagami ,  Makoto Yoshida ,  Hiroshi Kamiyama

发明人： Kazuhiko Maejima ,  Mitsuyoshi Kawai ,  Hiroki Matsukuma ,  Katsumichi Tagami ,  Makoto Yoshida ,  Hiroshi Kamiyama

IPC分类号： G11B5/60

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3106 ,  G11B5/3967

摘要： A thin-film magnetic head that shows stable read and/or write performances, maintaining the reliability over time by suppressing the wear of the head sufficiently, is provided. The head comprises: a substrate having an element-formed surface and an opposed-to-medium surface; a magnetic head element; an overcoat layer formed on the element-formed surface so as to cover the magnetic head element; a closure provided on the overcoat layer, a surface of the closure being in contact with the upper surface of the overcoat layer; and an element contact pad formed in a sliding-side surface of the head and having a contact surface including a part of the opposed-to-medium surface, a part of an end surface of the overcoat layer and a part of an end surface of the closure, one end of the magnetic head element reaching the contact surface.

摘要翻译： 提供了表现出稳定的读取和/或写入性能的薄膜磁头，通过足够地抑制头部的磨损来保持随时间的可靠性。 头部包括：具有元件形成表面和相对中间表面的基底; 磁头元件; 形成在所述元件形成表面上以覆盖所述磁头元件的外涂层; 设置在外涂层上的封盖，封盖的表面与外涂层的上表面接触; 以及形成在所述头部的滑动侧表面中的元件接触垫，并且具有包括相对中间表面的一部分的接触表面，所述外涂层的端面的一部分和端面的一部分 闭合件，磁头元件的一端到达接触表面。

公开(公告)号：US07712204B2

公开(公告)日：2010-05-11

申请号：US11711017

申请日：2007-02-27

申请人： Kazuhiko Maejima ,  Makoto Hasegawa ,  Atsuhiro Nonaka ,  Hiroshi Kamiyama ,  Teruhisa Shindo ,  Hiroshi Yamazaki

发明人： Kazuhiko Maejima ,  Makoto Hasegawa ,  Atsuhiro Nonaka ,  Hiroshi Kamiyama ,  Teruhisa Shindo ,  Hiroshi Yamazaki

IPC分类号： G11B5/187 ,  B24C1/08

CPC分类号： G11B5/3163 ,  B24B37/048 ,  G11B5/3169 ,  G11B5/3912 ,  Y10T29/49039 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048

摘要： A manufacturing method of a thin-film head includes the steps of, laminating and patterning a soft magnetic layer with iron alloy that contains silicon and aluminum through a base layer on a substrate; laminating an insulating layer on the patterned soft magnetic layer; performing a chemical-mechanical polishing of a surface of the laminated insulating layer and the patterned soft magnetic layer with a first acid slurry; forming a lower shield layer by a mechanical polishing with a second weak acid, or neutral slurry with a pH different from that of the first slurry; and forming a lower shield gap layer and a magnetoresistive effect layer on the lower shield layer.

摘要翻译： 薄膜头的制造方法包括以下步骤：通过基底上的基底层层叠含有硅和铝的铁合金的软磁性层的图案化; 在图案化的软磁性层上层叠绝缘层; 用第一种酸性浆料对叠层绝缘层表面和图案化软磁层进行化学机械抛光; 通过用第二弱酸或与第一浆料的pH不同的中性浆料进行机械抛光来形成下屏蔽层; 并在下屏蔽层上形成下屏蔽间隙层和磁阻效应层。

公开(公告)号：US20070035877A1

公开(公告)日：2007-02-15

申请号：US11497376

申请日：2006-08-02

申请人： Kazuhiko Maejima ,  Mitsuyoshi Kawai ,  Hiroki Matsukuma ,  Katsumichi Tagami ,  Makoto Yoshida ,  Hiroshi Kamiyama

发明人： Kazuhiko Maejima ,  Mitsuyoshi Kawai ,  Hiroki Matsukuma ,  Katsumichi Tagami ,  Makoto Yoshida ,  Hiroshi Kamiyama

IPC分类号： G11B5/187

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3106 ,  G11B5/3967

摘要： A thin-film magnetic head that shows stable read and/or write performances, maintaining the reliability over time by suppressing the wear of the head sufficiently, is provided. The head comprises: a substrate having an element-formed surface and an opposed-to-medium surface; a magnetic head element; an overcoat layer formed on the element-formed surface so as to cover the magnetic head element; a closure provided on the overcoat layer, a surface of the closure being in contact with the upper surface of the overcoat layer; and an element contact pad formed in a sliding-side surface of the head and having a contact surface including a part of the opposed-to-medium surface, a part of an end surface of the overcoat layer and a part of an end surface of the closure, one end of the magnetic head element reaching the contact surface.

摘要翻译： 提供了表现出稳定的读取和/或写入性能的薄膜磁头，通过足够地抑制头部的磨损来保持随时间的可靠性。 头部包括：具有元件形成表面和相对中间表面的基底; 磁头元件; 形成在所述元件形成表面上以覆盖所述磁头元件的外涂层; 设置在外涂层上的封盖，封盖的表面与外涂层的上表面接触; 以及形成在所述头部的滑动侧表面中的元件接触垫，并且具有包括相对中间表面的一部分的接触表面，所述外涂层的端面的一部分和端面的一部分 闭合件，磁头元件的一端到达接触表面。

公开(公告)号：US20090027812A1

公开(公告)日：2009-01-29

申请号：US12180580

申请日：2008-07-28

申请人： Hitoshi Noguchi ,  Yasushi Endo ,  Osamu Shimizu ,  Makoto Yoshida ,  Kazuhiko Maejima ,  Mitsuyoshi Kawai

发明人： Hitoshi Noguchi ,  Yasushi Endo ,  Osamu Shimizu ,  Makoto Yoshida ,  Kazuhiko Maejima ,  Mitsuyoshi Kawai

IPC分类号： G11B5/33

CPC分类号： G11B5/70 ,  G11B5/00826 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/3906 ,  G11B5/70678 ,  G11B5/7085 ,  G11B5/71 ,  G11B5/714

摘要： The magnetic signal reproduction system comprises a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support and a reproduction head, wherein a number of protrusions equal to or greater than 10 nm in height on the magnetic layer surface, as measured by an atomic force microscope, ranges from 50 to 2500/10,000 μm2, a quantity of lubricant on the magnetic layer surface, denoted as a surface lubricant index, ranges from 0.5 to 5.0, a surface abrasive occupancy of the magnetic layer ranges from 2 to 20 percent, the reproduction head is a magnetoresistive magnetic head comprising a spin-valve layer, the spin-valve layer comprises a magnetization free layer, a magnetization pinned layer and an antiferromagnetic layer, and the antiferromagnetic layer is comprised of alloy comprising iridium and manganese, and the reproduction head comes in sliding contact with the magnetic recording medium during signal reproduction.

摘要翻译： 磁信号再现系统包括磁记录介质，磁记录介质包括在非磁性载体上的铁磁性粉末和粘合剂的磁性层和再现磁头，其中在磁性层表面上高度等于或大于10nm的突起数目， 通过原子力显微镜测量的范围为50至2500 / 10,000mum2，表面润滑指数表示为磁性层表面的润滑剂的数量为0.5至5.0，磁性层的表面磨料占据率为 2〜20％，再现头是包括自旋阀层的磁阻磁头，自旋阀层包括磁化自由层，磁化钉扎层和反铁磁层，反铁磁层由包含铱的合金 和锰，并且再现头在信号再现期间与磁记录介质滑动接触。

公开(公告)号：US4972509A

公开(公告)日：1990-11-20

申请号：US368827

申请日：1989-06-20

申请人： Kazuhiko Maejima

发明人： Kazuhiko Maejima

IPC分类号： H03J5/24

CPC分类号： H03J5/244

摘要： In a tuner circuit in which a plurality of band signals are received by a single common high frequency amplifier stage, a band switching circuit switches a resonant circuit to .lambda./2 type when the amplifier stage receives the highest band signals and to .lambda./4 type when the amplifier stage receives band signals other than the highest band signals.

摘要翻译： 在通过单个公共高频放大器级接收多个频带信号的调谐器电路中，当放大器级接收到最高频带信号时，频带切换电路将谐振电路切换为λ/ 2型，并且将λ/ 4型 当放大器级接收除最高频带信号之外的频带信号时。

公开(公告)号：US20060170827A1

公开(公告)日：2006-08-03

申请号：US11321985

申请日：2005-12-29

申请人： Toru Suda ,  Kazuhiko Maejima ,  Yasuhiro Shimizu

发明人： Toru Suda ,  Kazuhiko Maejima ,  Yasuhiro Shimizu

IPC分类号： H04N5/63

CPC分类号： H04N5/46 ,  H03J1/005 ,  H04N5/455 ,  H04N21/41407 ,  H04N21/42638 ,  H04N21/6112 ,  H04N21/6131

摘要： A high frequency signal receiving device includes a reference frequency signal generating section operable to generate a reference frequency signal; a high frequency signal processing section operable to obtain a signal of a desired channel from a high frequency signal using the reference frequency signal, the high frequency signal being obtained by receiving a broadcast wave; an analog demodulating section operable to subject the signal of the desired channel to an analog demodulation process; and a digital demodulating section operable to subject the signal of the desired channel to a digital demodulation process using the reference frequency signal.