公开(公告)号：US07780344B2

公开(公告)日：2010-08-24

申请号：US11860811

申请日：2007-09-25

申请人： Takumi Yanagisawa ,  Naoki Ohta ,  Yosuke Antoku

发明人： Takumi Yanagisawa ,  Naoki Ohta ,  Yosuke Antoku

IPC分类号： G01N3/60 ,  G01N25/72

CPC分类号： G01R31/2849 ,  B82Y25/00 ,  G01R31/311 ,  G01R33/093 ,  G01R33/098

摘要： The estimation method of the invention for estimating the deteriorations of a magneto-resistive effect device by heat shocks involves applying heat shocks by laser irradiation to a structure including a thin-film magnetic head comprising a magneto-resistive effect device to propagate them to the magneto-resistive effect device, thereby causing the deteriorations of the magneto-resistive effect device. Thus, (1) the deterioration mode phenomenon of “local overheating plus vibration” can be imitated in a simple yet very approximate state so that a device likely to undergo characteristics deteriorations due to the thermal asperity problem can be detected early at an initial fabrication process stage, and (2) what specifications a head device structure less likely to offer the thermal asperity problem is in can be judged at a product development stage.

摘要翻译： 用于通过热冲击来估计磁阻效应器件的劣化的本发明的估计方法包括通过激光照射对包括由磁阻效应器件构成的薄膜磁头的结构进行热冲击以将它们传播到磁 电阻效应器件，从而导致磁阻效应器件的劣化。 因此，（1）“局部过热加振动”的劣化模式现象可以在简单但非常近似的状态下被模仿，从而可以在初始制造过程中早期检测到由于热不均匀性问题而容易发生特性劣化的装置 阶段，（2）可以在产品开发阶段判断头部器件结构不太可能提供热凹凸问题的规格。

公开(公告)号：US20090080491A1

公开(公告)日：2009-03-26

申请号：US11860811

申请日：2007-09-25

申请人： Takumi Yanagisawa ,  Naoki Ohta ,  Yosuke Antoku

发明人： Takumi Yanagisawa ,  Naoki Ohta ,  Yosuke Antoku

IPC分类号： G01N25/72

CPC分类号： G01R31/2849 ,  B82Y25/00 ,  G01R31/311 ,  G01R33/093 ,  G01R33/098

摘要： The estimation method of the invention for estimating the deteriorations of a magneto-resistive effect device by heat shocks involves applying heat shocks by laser irradiation to a structure including a thin-film magnetic head comprising a magneto-resistive effect device to propagate them to the magneto-resistive effect device, thereby causing the deteriorations of the magneto-resistive effect device. Thus, (1) the deterioration mode phenomenon of “local overheating plus vibration” can be imitated in a simple yet very approximate state so that a device likely to undergo characteristics deteriorations due to the thermal asperity problem can be detected early at an initial fabrication process stage, and (2) what specifications a head device structure less likely to offer the thermal asperity problem is in can be judged at a product development stage.

摘要翻译： 用于通过热冲击来估计磁阻效应器件的劣化的本发明的估计方法包括通过激光照射对包括由磁阻效应器件构成的薄膜磁头的结构进行热冲击以将它们传播到磁 电阻效应器件，从而导致磁阻效应器件的劣化。 因此，（1）“局部过热加振动”的劣化模式现象可以在简单但非常近似的状态下被模仿，从而可以在初始制造过程中早期检测到由于热不均匀性问题而容易发生特性劣化的装置 阶段，（2）可以在产品开发阶段判断头部器件结构不太可能提供热凹凸问题的规格。

公开(公告)号：US10270937B2

公开(公告)日：2019-04-23

申请号：US15371639

申请日：2016-12-07

申请人： Tomonori Tanaka ,  Naoki Ohta ,  Mitsutaka Iwasaki ,  Yuuto Watanabe

发明人： Tomonori Tanaka ,  Naoki Ohta ,  Mitsutaka Iwasaki ,  Yuuto Watanabe

IPC分类号： H04N1/00 ,  H04N1/387 ,  H04N1/21 ,  H04N1/32

摘要： An image processing device includes an external memory interface to write image data to an image memory, and an inclination correction circuit. The inclination correction circuit generates coordinate information based on inclination information, detects, from the coordinate information, a minimum sub-scanning coordinate in each of divided areas of the image data, generates first read addresses for reading the divided areas of the image data from the image memory based on the minimum sub-scanning coordinate, reads the divided areas of the image data from the image memory based on the first read addresses, writes the divided areas of the image data to an internal memory, generates second read addresses for reading the divided areas of the image data from the internal memory based on the coordinate information, and reads the divided areas of the image data from the internal memory based on the second read addresses.

公开(公告)号：US08593139B2

公开(公告)日：2013-11-26

申请号：US12947328

申请日：2010-11-16

申请人： Naoki Ohta ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

发明人： Naoki Ohta ,  Hiraku Hirabayashi ,  Masanori Sakai ,  Hiroshi Naganuma

IPC分类号： G01R33/02

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/0029

摘要： A magnetic sensor includes a spin valve-type magneto-resistive element, a voltage detection part, a coil, and a current control part, the coil being configured to apply a measuring magnetic field to the spin valve-type magneto-resistive element upon application of a current, the voltage detection part being configured to output a detection signal to the current control part upon detecting an output voltage of the spin valve-type magneto-resistive element reaching a predetermined voltage value, the current control part being configured to control the current to unidirectionally increase or unidirectionally decrease a strength of the measuring magnetic field from an initial value, but upon input of the detection signal, control the current to return the strength of the measuring magnetic field to the initial value, the initial value being a magnetic field strength where the spin valve-type magneto-resistive element reaches saturation magnetization.

摘要翻译： 磁传感器包括自旋阀型磁阻元件，电压检测部件，线圈和电流控制部件，该线圈被配置为在应用时向自旋阀型磁阻元件施加测量磁场 电流检测部分被配置为在检测到自旋阀型磁阻元件的输出电压达到预定电压值时将检测信号输出到电流控制部分，该电流控制部分被配置为控制电流控制部分 电流从初始值​​单向增加或单向地降低测量磁场的强度，但是当输入检测信号时，控制电流将测量磁场的强度返回到初始值，初始值为磁 自旋阀型磁阻元件达到饱和磁化强度的场强。

公开(公告)号：US08117736B2

公开(公告)日：2012-02-21

申请号：US12332581

申请日：2008-12-11

申请人： Naoki Ohta ,  Takeo Kagami

发明人： Naoki Ohta ,  Takeo Kagami

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： B24B49/04 ,  B24B37/00 ,  B24B49/10 ,  G11B5/102 ,  G11B5/3166 ,  G11B5/3169 ,  G11B5/3173 ,  G11B5/3903 ,  Y10T29/49036 ,  Y10T29/49037 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method of lapping a magnetic head slider includes a step of lapping a lapping surface of a row bar provided with a plurality of MR read head elements arranged along at least one line, a step of obtaining at least one output signal from at least one of the plurality of MR read head elements of the row bar during lapping, the at least one output signal corresponding to element resistance, a step of detecting at least one peak value of the obtained at least one output signal, and a step of controlling an amount of lapping of the row bar depending upon the detected at least one peak value.

摘要翻译： 一种研磨磁头滑动器的方法包括：研磨设置有沿着至少一条线布置的多个MR读取头元件的行杆的研磨表面的步骤，从至少一个方向获得至少一个输出信号的步骤 在研磨期间行列的多个MR读取头元件，对应于元件电阻的至少一个输出信号，检测所获得的至少一个输出信号的至少一个峰值的步骤，以及控制量的步骤 根据检测到的至少一个峰值来研磨行条。

公开(公告)号：US08064160B2

公开(公告)日：2011-11-22

申请号：US11882029

申请日：2007-07-30

申请人： Naoki Ohta ,  Kenkichi Anagawa

发明人： Naoki Ohta ,  Kenkichi Anagawa

IPC分类号： G11B5/17 ,  G11B5/147

CPC分类号： G11B5/3123 ,  G11B5/1278

摘要： A magnetic head includes a medium facing surface, a coil, and a pole layer that generates a write magnetic field. The pole layer includes: a track width defining portion having a first end located in the medium facing surface and a second end opposite to the first end; and a wide portion connected to the second end. The first end defines the track width. The track width defining portion has a width taken in the track width direction, and the wide portion has a width taken in the track width direction that is greater than the width of the track width defining portion taken in the track width direction. The coil is helically wound only around the track width defining portion of the pole layer, and has a portion located between the medium facing surface and the wide portion.

摘要翻译： 磁头包括面向介质的表面，线圈和产生写磁场的极层。 极层包括：轨道宽度限定部分，其具有位于介质面对表面中的第一端和与第一端相对的第二端; 并且宽部分连接到第二端。 第一端定义轨道宽度。 轨道宽度限定部分具有在轨道宽度方向上取的宽度，并且宽部分具有在轨道宽度方向上取宽度大于沿着轨道宽度方向拍摄的轨道宽度限定部分的宽度的宽度。 线圈仅围绕极层的轨道宽度限定部分螺旋缠绕，并且具有位于介质面向表面和宽部分之间的部分。

公开(公告)号：US07952827B2

公开(公告)日：2011-05-31

申请号：US11780973

申请日：2007-07-20

申请人： Naoki Ohta ,  Kosuke Tanaka

发明人： Naoki Ohta ,  Kosuke Tanaka

IPC分类号： G11B5/02 ,  G11B5/40

CPC分类号： G11B5/1278 ,  G11B2005/0016 ,  G11B2005/0021 ,  G11B2005/0034

摘要： A heat-assisted magnetic head that can efficiently and locally heat a magnetic recording medium. The head includes a heating coil element, and a write head element for writing data signals by generating a signal magnetic field, and a read head element for reading data signals by sensing the signal magnetic field. The heating coil element comprises a main heating magnetic pole layer, an auxiliary heating magnetic pole layer, and a heating coil layer for generating a magnetic flux in the main heating magnetic pole layer and the auxiliary heating magnetic pole layer and passing through at least between the main heating magnetic pole layer and the auxiliary heating magnetic pole layer. The read head element, heating coil element, and the write head element are stacked in this order from an element-formed surface of a substrate.

摘要翻译： 一种可以有效地和局部加热磁记录介质的热辅助磁头。 头部包括加热线圈元件，以及用于通过产生信号磁场来写入数据信号的写入头元件，以及用于通过感测信号磁场来读取数据信号的读取头元件。 加热线圈元件包括主加热磁极层，辅助加热磁极层和用于在主加热磁极层和辅助加热磁极层中产生磁通的加热线圈层，并且至少在 主加热磁极层和辅助加热磁极层。 读头元件，加热线圈元件和写头元件从衬底的元件形成表面依次层叠。

公开(公告)号：US20110025322A1

公开(公告)日：2011-02-03

申请号：US12845992

申请日：2010-07-29

申请人： Hiroshi YAMAZAKI ,  Hiraku Hirabayashi ,  Naoki Ohta

发明人： Hiroshi YAMAZAKI ,  Hiraku Hirabayashi ,  Naoki Ohta

IPC分类号： G01R33/09

CPC分类号： G01R33/091 ,  G01R33/0005

摘要： A magneto-resistance effect element for a sensor to sense a variation in externally applied magnetism includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction which varies in response to an external magnetic field, and an intermediate layer provided between the pinned layer and the free layer. The pinned layer has a planar shape which is long in the fixed magnetization direction and which is short in a direction orthogonal to the fixed magnetization direction. Moreover, the pinned layer preferably has a planar shape in which the pinned layer is divided into a plurality of sections.

摘要翻译： 用于感测外部施加的磁性的变化的传感器的磁电阻效应元件包括具有固定的磁化方向的固定层，具有响应于外部磁场而变化的磁化方向的自由层，以及设置在 钉扎层和自由层。 钉扎层具有在固定磁化方向上长的并且在与固定磁化方向正交的方向上短的平面形状。 此外，被钉扎层优选具有其中被钉扎层被分成多个部分的平面形状。

公开(公告)号：US07742260B2

公开(公告)日：2010-06-22

申请号：US11469091

申请日：2006-08-31

申请人： Naoki Ohta ,  Nozomu Hachisuka

发明人： Naoki Ohta ,  Nozomu Hachisuka

IPC分类号： G11B5/55

CPC分类号： G11B5/4826 ,  G11B5/3906

摘要： A magnetic head assembly includes a magnetic head slider with an element-formed surface on which at least one MR read head element is formed, an ABS to be opposed in operation to a magnetic recording medium and a fixing surface that is the other side of the ABS, and a support for supporting the magnetic head slider. The fixing surface of the magnetic head slider is fixed to the support by at least cure-shrinkage resin material layer providing a contractive force when cured. The cure-shrinkage resin material layer has at least one strip-shaped pattern running along a track width direction.

摘要翻译： 磁头组件包括具有元件形成表面的磁头滑动器，在其上形成至少一个MR读取头元件，在操作中与磁记录介质相对的ABS和作为磁记录介质的另一侧的固定表面 ABS和用于支撑磁头滑块的支撑。 磁头滑块的固定表面至少在固化时提供收缩力的固化收缩树脂材料层固定在支撑体上。 固化收缩树脂材料层具有沿着轨道宽度方向延伸的至少一个条状图案。

公开(公告)号：US20090130491A1

公开(公告)日：2009-05-21

申请号：US11984243

申请日：2007-11-15

申请人： Naoki Ohta ,  Hiroshi Yamazaki

发明人： Naoki Ohta ,  Hiroshi Yamazaki

IPC分类号： G11B5/39 ,  B05D5/12 ,  G11B5/127

CPC分类号： G11B5/3932 ,  B82Y10/00 ,  B82Y25/00 ,  G11B2005/3996 ,  Y10T428/1121

摘要： A magnetoresistive element (MR element) for reading a change in a magnetic field of a magnetic recording medium includes first and second electrode layers for providing a sensing current, which are perpendicular to an air bearing surface (ABS) facing the magnetic recording medium, first and second free layers which have a magnetization direction which changes in accordance with an external magnetic field, and a spacer layer composed of non-magnetic material. A ratio of a representative width and a representative length of each of the first and second free layers is at least 2 to 1, to thereby provide initial magnetizations along a direction of the representative length of each of the first and second free layers.

摘要翻译： 用于读取磁记录介质的磁场变化的磁阻元件（MR元件）包括用于提供感测电流的第一和第二电极层，第一和第二电极层垂直于面向磁记录介质的空气轴承表面（ABS），第一 以及具有根据外部磁场而变化的磁化方向的第二自由层和由非磁性材料构成的间隔层。 第一自由层和第二自由层中的每个的代表性宽度和代表性长度的比率至少为2比1，从而沿着第一和第二自由层的每个的代表性长度的方向提供初始磁化。