公开(公告)号：US08284521B2

公开(公告)日：2012-10-09

申请号：US11998727

申请日：2007-11-30

申请人： Takayoshi Ohtsu

发明人： Takayoshi Ohtsu

IPC分类号： G11B5/60 ,  G11B5/127

CPC分类号： G11B5/3133 ,  G11B5/3967 ,  G11B5/6064 ,  G11B5/607

摘要： Embodiments of the present invention help to provide a flying height adjusting type magnetic head slider with reduced influence of a heater coil induction field. According to one embodiment, a magnetic head slider comprises a heater, a read element, and a write element, which are formed on a substrate. The heater is formed between a lower magnetic shield of the read element and the substrate by meandering a heater coil in direction Y going away from ABS. Magnetic fields by generated in direction Y orthogonal to a track width direction X of the lower magnetic field upon energization of the heater coil are offset each other, exerting no influence on the magnetized state in the track width direction X of the lower magnetic shield. A magnetic field hx induced in the track width direction X of the lower magnetic shield is coincident with the magnetizing direction of the lower magnetic shield, acting to maintain the magnetized state of the lower magnetic shield.

摘要翻译： 本发明的实施例有助于提供一种减小加热器线圈感应场的影响的飞行高度调节型磁头滑块。 根据一个实施例，磁头滑块包括形成在基板上的加热器，读取元件和写入元件。 加热器通过在远离ABS的方向Y上蜿蜒加热线圈而形成在读取元件的下部磁屏蔽和基板之间。 在加热线圈通电时与下磁场的磁道宽度方向X正交的方向Y上产生的磁场相互抵消，对下磁屏蔽的磁道宽度方向X上的磁化状态没有影响。 在下磁屏蔽的磁道宽度方向X上感应的磁场hx与下磁屏蔽的磁化方向一致，用于保持下磁屏蔽的磁化状态。

公开(公告)号：US20100157483A1

公开(公告)日：2010-06-24

申请号：US12633588

申请日：2009-12-08

申请人： Takayoshi Ohtsu

发明人： Takayoshi Ohtsu

IPC分类号： G11B5/48

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/6005

摘要： In one embodiment, a magnetic head slider includes a write head having a single magnetic pole, the single magnetic pole having a main magnetic pole piece that extends to a medium opposing surface facing a magnetic disk. The main magnetic pole piece generates a recording magnetic field from a medium opposing surface side end face thereof being divided into an injection region and a non-injection region. Impurities which deteriorate magnetic properties are present in a higher concentration in the injection region relative to a concentration of the impurities in the non-injection region due to injection of the impurities in the injection region. The non-injection region has a narrower width at a leading end of the medium opposing surface side end face than at a trailing end of the medium opposing surface side end face. In another embodiment, the magnetic head slider may be incorporated into a system including a magnetic recording medium, at least one magnetic head, and a control unit coupled to the magnetic head.

摘要翻译： 在一个实施例中，磁头滑块包括具有单个磁极的写入头，该单个磁极具有延伸到与磁盘相对的介质相对表面的主磁极片。 主磁极片从介质相对表面侧端面产生记录磁场，其被分成喷射区域和非喷射区域。 由于注入区域中的杂质的注入，相对于非注入区域中的杂质浓度，注入区域中的磁性降低的杂质存在于较高的浓度。 非注入区域在介质相对表面侧端面的前端处比在介质相对表面侧端面的后端处具有较窄的宽度。 在另一个实施例中，磁头滑块可以结合到包括磁记录介质，至少一个磁头和耦合到磁头的控制单元的系统中。

公开(公告)号：US07723982B2

公开(公告)日：2010-05-25

申请号：US11656337

申请日：2007-01-19

申请人： Shinji Sasaki ,  Makoto Torigoe ,  Takayoshi Ohtsu ,  Kouji Kataoka

发明人： Shinji Sasaki ,  Makoto Torigoe ,  Takayoshi Ohtsu ,  Kouji Kataoka

IPC分类号： G01R33/12 ,  G01B7/14

CPC分类号： G11B5/455

摘要： A magnetic head suffers mechanical stresses by striking against a magnetic disc surface and dust, so that there are problems such as the reduction of reproduction output due to the mechanical stresses and the reversal of output polarity due to the mechanical stresses. Embodiments in accordance with the present invention relate to a method of testing reliability of reproduction elements of a magnetic head against outside stress. In a first step, a Giant Magnetoresistive (GMR) element on a row bar of the object of inspection, or a GMR element on a slider is measured for the output against external magnetic field. In the next step, prescribed shearing stress is applied with indenter to the edge where the GMR element-formed surface of the row bar or slider and the air-bearing surface are crossed. Then, output of the GMR element is measured again. Lastly, the outputs of the GMR element before and after application of stress are compared. When the amount of degradation is higher than the prescribed standard, the product is regarded as disqualified. Satisfaction of the prescribed standard is regarded as acceptance.

摘要翻译： 磁头通过撞击磁盘表面和灰尘而受到机械应力，因此存在诸如由于机械应力而导致的再现输出的减少和由于机械应力而导致的输出极性反转的问题。 根据本发明的实施例涉及一种测量磁头的再现元件对外部应力的可靠性的方法。 在第一步中，测量检测对象的行条上的巨磁阻（GMR）元件或滑块上的GMR元件，以抵抗外部磁场的输出。 在下一步骤中，将压痕施加规定的剪切应力到排条或滑块的GMR元件形成表面和空气轴承表面交叉的边缘。 然后，再次测量GMR元件的输出。 最后，比较应用前后GMR元件的输出。 当降解量高于规定标准时，产品被认定为不合格品。 对规定标准的满意度被视为验收。

公开(公告)号：US07684153B2

公开(公告)日：2010-03-23

申请号：US11439687

申请日：2006-05-23

申请人： Takayoshi Ohtsu ,  Nobumasa Nishiyama

发明人： Takayoshi Ohtsu ,  Nobumasa Nishiyama

IPC分类号： G11B5/48 ,  G11B5/33

CPC分类号： G11B5/486 ,  G11B5/314 ,  G11B5/6005 ,  G11B5/607

摘要： Crosstalk from a write signal on wiring on a suspension needs to be reduced since an ESD withstand voltage is decreased due to high sensitivity of a GMR head. In one embodiment, a terminal arrangement on an element-forming surface of a magnetic head slider consists of a ground terminal G, a read terminal R+, a read terminal R−, a write terminal W+ and a write terminal W− in order from the outside. With this terminal arrangement, the wiring order on a suspension consists of a read wire R−, a read wire R+, a ground line G, a write wire W− and a write wire W+ in an arrangement unlike the terminal arrangement. In other words, the ground line G is interposed between the write wires W and the read wires R. In this way, the wiring of the write wire W and the wiring of the read wire R are never arranged adjacently to each other, and further, the ground line G is interposed between the write wires W and the read wires R, thereby reducing crosstalk on the read wires R caused by a writing current with a high frequency which flows in the write wires W.

摘要翻译： 由于GMR磁头的高灵敏度，ESD耐受电压降低，所以需要降低悬架上布线上写信号的串扰。 在一个实施例中，磁头滑块的元件形成表面上的端子装置由接地端子G，读取端子R +，读取端子R-，写入端子W +和写入端子W-按照从 外。 利用该端子装置，与终端装置不同，在悬架上的接线顺序由读线R，读线R +，接地线G，写线W-和写线W +组成。 换句话说，接地线G被插入在写入线W和读取导线R之间。这样，写入线W和读取的线R的布线的布线将不会彼此相邻布置，并且进一步 接地线G被插入在写入线W和读出导线R之间，从而减少由写入线W中流动的高频写入电流引起的读取线R上的串扰。

公开(公告)号：US07623323B2

公开(公告)日：2009-11-24

申请号：US11227677

申请日：2005-09-14

申请人： Koichi Nishioka ,  Shuichi Kojima ,  Koji Kataoka ,  Takayoshi Ohtsu

发明人： Koichi Nishioka ,  Shuichi Kojima ,  Koji Kataoka ,  Takayoshi Ohtsu

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3912 ,  G11B5/3929 ,  G11B2005/3996

摘要： Embodiments of the invention provide a reading head structure that ensures a stable magnetic moment of a pinned layer against a great external magnetic field, and minimizes the pinned-layer damage occurring during air-bearing surface machining. In one embodiment, a magnetoresistive head is based on a spin-valve effect and has free layers, a stacked-type pinned layer, and an electroconductive nonmagnetic spacer layer positioned between the free layers and the stacked-type pinned layer. The stacked-type pinned layer includes three ferromagnetic films, and antiferromagnetic coupling films interposed between the ferromagnetic films. Of these ferromagnetic films, the first two films have a high coercivity and a high resistivity. The third ferromagnetic film is made of a material that gives a great magnetoresistive effect. The sum of the magnetic moments generated from the stacked-type pinned layer is substantially zero.

摘要翻译： 本发明的实施例提供了一种读取头结构，其确保针对大的外部磁场的被钉扎层的稳定的磁矩，并且使在空气轴承表面加工期间发生的钉扎层损伤最小化。 在一个实施例中，磁阻头基于自旋阀效应，并且具有自由层，层叠型钉扎层和位于自由层和堆叠型钉扎层之间的导电非磁性间隔层。 堆叠型钉扎层包括三个铁磁膜和介于铁磁膜之间的反铁磁耦合膜。 在这些铁磁膜中，前两个膜具有高矫顽力和高电阻率。 第三铁磁膜由具有很大磁阻效应的材料制成。 从堆叠型钉扎层产生的磁矩的总和基本为零。

公开(公告)号：US07558188B2

公开(公告)日：2009-07-07

申请号：US11291014

申请日：2005-11-29

申请人： Takayoshi Ohtsu ,  Shoji Natori

发明人： Takayoshi Ohtsu ,  Shoji Natori

IPC分类号： G11B5/127

CPC分类号： G11B5/40

摘要： Embodiments of the invention provide a read head which is implemented in a magnetic disk drive that supports a high recording density and a high transfer rate and is excellent in static electricity durability. In one embodiment, a magnetic head wherein a charge diffuses from a read element to a slider at a time constant of about 100 ms or less.

摘要翻译： 本发明的实施例提供了一种在支持高记录密度和高传输速率并且静电耐久性优异的磁盘驱动器中实现的读头。 在一个实施例中，其中电荷以大约100ms或更小的时间常数从读取元件扩散到滑块的磁头。

公开(公告)号：US20070253105A1

公开(公告)日：2007-11-01

申请号：US11786458

申请日：2007-04-10

申请人： Nubuo Yoshida ,  Katsuro Watanabe ,  Takayoshi Ohtsu

发明人： Nubuo Yoshida ,  Katsuro Watanabe ,  Takayoshi Ohtsu

IPC分类号： G11B5/147 ,  G11B5/127

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3163 ,  G11B5/3929 ,  G11B2005/3996 ,  H01F41/34 ,  Y10T29/49021

摘要： Embodiments in accordance with the present invention provide a thin film magnetic head for preventing a short-circuit failure during formation of a track portion or a stripe-height portion and improving a yield. In one embodiment, a stripe-height direction is first formed, and then a track-width direction is formed. A third insulating film having a smoothly shaped wall surface is formed on a first insulating film during stripe-height formation. During formation of the third insulating film, an optimized lift-off pattern is used to smooth an edge shape.

摘要翻译： 根据本发明的实施例提供了一种薄膜磁头，用于防止在形成轨道部分或条纹高度部分期间发生短路故障并提高产量。 在一个实施例中，首先形成条纹高度方向，然后形成轨道宽度方向。 在条纹高度形成期间，在第一绝缘膜上形成具有平滑形状的壁表面的第三绝缘膜。 在第三绝缘膜的形成期间，使用优化的剥离图案来平滑边缘形状。

公开(公告)号：US20060268459A1

公开(公告)日：2006-11-30

申请号：US11439687

申请日：2006-05-23

申请人： Takayoshi Ohtsu ,  Nobumasa Nishiyama

发明人： Takayoshi Ohtsu ,  Nobumasa Nishiyama

IPC分类号： G11B5/60

CPC分类号： G11B5/486 ,  G11B5/314 ,  G11B5/6005 ,  G11B5/607

摘要： Crosstalk from a write signal on wiring on a suspension needs to be reduced since an ESD withstand voltage is decreased due to high sensitivity of a GMR head. In one embodiment, a terminal arrangement on an element-forming surface of a magnetic head slider consists of a ground terminal G, a read terminal R+, a read terminal R−, a write terminal W+ and a write terminal W− in order from the outside. With this terminal arrangement, the wiring order on a suspension consists of a read wire R−, a read wire R+, a ground line G, a write wire W− and a write wire W+ in an arrangement unlike the terminal arrangement. In other words, the ground line G is interposed between the write wires W and the read wires R. In this way, the wiring of the write wire W and the wiring of the read wire R are never arranged adjacently to each other, and further, the ground line G is interposed between the write wires W and the read wires R, thereby reducing crosstalk on the read wires R caused by a writing current with a high frequency which flows in the write wires W.

摘要翻译： 由于GMR磁头的高灵敏度，ESD耐受电压降低，所以需要降低悬架上布线上写信号的串扰。 在一个实施例中，磁头滑块的元件形成表面上的端子装置由接地端子G，读取端子R +，读取端子R-，写入端子W +和写入端子W-按照从 外。 利用该端子装置，与终端装置不同，在悬架上的接线顺序由读线R，读线R +，接地线G，写线W-和写线W +组成。 换句话说，地线G插入在写入线W和读取导线R之间。这样，写入线W和读取的线R的布线的布线将不会彼此相邻布置，并且进一步 接地线G被插入在写入线W和读出导线R之间，从而减少由写入线W中流动的高频写入电流引起的读取线R上的串扰。

公开(公告)号：US20060152864A1

公开(公告)日：2006-07-13

申请号：US11372302

申请日：2006-03-08

申请人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

发明人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  G11B2005/3996

摘要： A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track width is 200 nm or less, and a difference between a product of saturation magnetic flux density and a film thickness of the first free magnetic film, and that of the second free magnetic film is within a range from 1 to 3 nmT. By this structure, the variation of output and the variation of asymmetry is greatly decreased at a track width of 200 nm or less.

摘要翻译： 磁阻头包括具有夹在其间的非磁性中间膜的第一和第二自由磁性膜的自由磁性层，第一和第二自由磁性膜的各自的磁化方向是反平行的。 自由磁性层在磁道宽度方向上的长度为200nm以下，饱和磁通密度与第一自由磁性膜的膜厚的乘积与第二自由磁性膜的膜厚之差 在1〜3nmT的范围内。 通过这种结构，在200nm或更小的轨道宽度处，输出的变化和不对称性的变化大大降低。

公开(公告)号：US20060067013A1

公开(公告)日：2006-03-30

申请号：US11227677

申请日：2005-09-14

申请人： Koichi Nishioka ,  Shuichi Kojima ,  Koji Kataoka ,  Takayoshi Ohtsu

发明人： Koichi Nishioka ,  Shuichi Kojima ,  Koji Kataoka ,  Takayoshi Ohtsu

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3912 ,  G11B5/3929 ,  G11B2005/3996

摘要： Embodiments of the invention provide a reading head structure that ensures a stable magnetic moment of a pinned layer, even in a very small sensor, against a great external magnetic field, and minimizes the pinned-layer damage occurring during air-bearing surface machining, and provide a reading head not suffering the deterioration of a pinned layer in terms of magnetic structure when the head is actually used in a hard disk. In one embodiment, a magnetoresistive head is based on a spin-valve effect and has free layers, a stacked-type pinned layer, and an electroconductive nonmagnetic spacer layer positioned between the free layers and the stacked-type pinned layer. The stacked-type pinned layer includes three ferromagnetic films, and antiferromagnetic coupling films interposed between the ferromagnetic films. Of these ferromagnetic films, the first two films have a high coercivity and a high resistivity. The third ferromagnetic film is made of a material that gives a great magnetoresistive effect. The sum of the magnetic moments generated from the stacked-type pinned layer is substantially zero.

摘要翻译： 本发明的实施例提供一种阅读头结构，即使在非常小的传感器中也能抵抗大的外部磁场，确保被钉扎层的稳定的磁矩，并且使空气轴承表面加工期间发生的钉扎层损伤最小化，以及 当头部实际上用于硬盘时，提供一种读取头不会在磁结构方面遭受被钉扎层的劣化。 在一个实施例中，磁阻头基于自旋阀效应，并且具有自由层，层叠型钉扎层和位于自由层和堆叠型钉扎层之间的导电非磁性间隔层。 堆叠型钉扎层包括三个铁磁膜和介于铁磁膜之间的反铁磁耦合膜。 在这些铁磁膜中，前两个膜具有高矫顽力和高电阻率。 第三铁磁膜由具有很大磁阻效应的材料制成。 从堆叠型钉扎层产生的磁矩的总和基本为零。