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41.发明授权Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 有权薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器公开(公告)号：US08085499B2
公开(公告)日：2011-12-27
申请号：US12888621
申请日：2010-09-23
CPC分类号： G11B5/3906 , G11B5/1278
摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.
摘要翻译： 具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生高磁记录场，同时还进行修改以抑制在写入操作之后立即发生的剩余磁场。 提供用于向主极提供磁通量的返回路径和用于激励主极和返回路径的导电线圈。 主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。 低饱和磁通密度层和高饱和磁通密度通过利用磁极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。
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公开(公告)号：US20070253117A1
公开(公告)日：2007-11-01
申请号：US11788038
申请日：2007-04-17
申请人： Hisako Takei , Nobuo Yoshida , Hiroyuki Hoshiya , Taku Shintani
发明人： Hisako Takei , Nobuo Yoshida , Hiroyuki Hoshiya , Taku Shintani
CPC分类号： G01R33/093 , B82Y25/00 , G11B5/3163 , G11B5/398 , Y10T29/49021
摘要： Embodiments in accordance with the present invention provide a sensor to produce high output with a small track width. Particular embodiments include forming a magnetoresistive sensor of a read head to be substantially vertical in its upper portion and gently upwardly convexly curved in its lower portion.
摘要翻译： 根据本发明的实施例提供一种用于产生具有小轨道宽度的高输出的传感器。 具体实施例包括形成读头的磁阻传感器在其上部基本垂直并且在其下部中轻轻地向上凸起地弯曲。
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43.发明授权Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 失效薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器公开(公告)号：US07221538B2
公开(公告)日：2007-05-22
申请号：US10644022
申请日：2003-08-20
CPC分类号： G11B5/3906 , G11B5/1278
摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field exceeding 10 kOe while suppressing remanent magnetic fields occurring immediately after write operations. The perpendicular magnetic head comprises a main pole, a return path for supplying a magnetic flux to that main pole, and a conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer has a thickness within 0.5 to 5 nanometers, and The high saturation flux density layer has a thickness from 10 to 50.
摘要翻译： 具有能够记录密度高达100吉比特/平方英寸的窄主磁极的薄膜垂直磁头，并且在写入操作之后立即产生高磁记录场超过10kOe，同时抑制残留的磁场。 垂直磁头包括主极，用于向该主极提供磁通的返回路径和用于激励主极和返回路径的导电线圈。 主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。 低饱和磁通密度层的厚度为0.5〜5纳米，高饱和磁通密度层的厚度为10〜50。
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公开(公告)号：US07057853B2
公开(公告)日：2006-06-06
申请号：US10610792
申请日：2003-07-02
IPC分类号： G11B5/147
CPC分类号： G11B5/1278
摘要： The disclosed invention provides a magnetic head of high stability in which “erase after write” is prevented. Here is provided a magnetic head comprising a thin-film magnetic head for perpendicular magnetic recording, the thin-film magnetic head including a main pole with its tip facing a magnetic recording medium and coils for exciting the main pole, wherein the tip of or at least a part of the main pole consists of a soft magnetic multilayer containing laminations, each of which comprises a first ferromagnetic film, a second ferromagnetic film, and an antiparallel coupling layer formed between the first ferromagnetic film and the second ferromagnetic film, wherein the antiparallel coupling layer causes antiferromagnetic interlayer coupling of the first ferromagnetic film and the second ferromagnetic film.
摘要翻译： 所公开的发明提供了一种高稳定性的磁头，其中防止“写入后擦除”。 这里提供了一种磁头，其包括用于垂直磁记录的薄膜磁头，该薄膜磁头包括一个主极，其顶端面向磁记录介质和用于激励主极的线圈，其中尖端或 主极的至少一部分由包含叠层的软磁性多层组成，每层包含第一铁磁膜，第二铁磁膜和形成在第一铁磁膜和第二铁磁膜之间的反并联耦合层，其中反平行 耦合层引起第一铁磁膜和第二铁磁膜的反铁磁层间耦合。
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公开(公告)号：US06794063B2
公开(公告)日：2004-09-21
申请号：US10153618
申请日：2002-05-24
申请人： Yasuyuki Okada , Kazue Kudo , Hiroyuki Hoshiya
发明人： Yasuyuki Okada , Kazue Kudo , Hiroyuki Hoshiya
IPC分类号： G11B5147
CPC分类号： G11B5/3109 , G11B5/3163 , Y10S428/90 , Y10T428/1143 , Y10T428/115
摘要： The present invention provides a thin film magnetic head having sufficient recording performance on a recording medium imparted with a large coercive force. According to the present invention, a plated magnetic thin film can be obtained in which a crystal grain size is modulated in a film thickness direction and a coercive force is reduced. Further, according to the present invention, even for a composition area indicating a high saturation magnetic flux density in which, conventionally, soft magnetic properties could not be obtained, magnetic film having an excellent soft magnetic property can be manufactured.
摘要翻译： 本发明提供一种在赋予矫顽力的记录介质上具有足够记录性能的薄膜磁头。 根据本发明，可以获得在膜厚度方向调制晶粒尺寸并减小矫顽力的镀覆磁性薄膜。 此外，根据本发明，即使在表示高饱和磁通密度的组成区域中，通常也不能获得软磁特性，所以可以制造出具有优良的软磁特性的磁性膜。
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46.发明授权公开(公告)号：US08223464B2
公开(公告)日：2012-07-17
申请号：US12615221
申请日：2009-11-09
申请人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
发明人： Kan Yasui , Masato Shiimoto , Takeshi Nakagawa , Hiroyuki Katada , Nobuo Yoshida , Hiroyuki Hoshiya
CPC分类号： G11B5/3163 , G11B5/398
摘要： In one embodiment, a differential-type magnetic read head includes a differential-type magneto-resistive-effect film formed on a substrate, and a pair of electrodes for applying current in a direction perpendicular to a film plane of the film. The film includes a first and second stacked film, each having a pinned layer, an intermediate layer, and a free layer, with the second stacked film being formed on the first stacked film. A side face in a track width direction of the film is shaped to have an inflection point at an intermediate position in a thickness direction of the film, and the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point. Also, the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point.
摘要翻译： 在一个实施例中，差分型磁读头包括形成在基板上的差分型磁阻效应膜和用于在垂直于膜的膜平面的方向上施加电流的一对电极。 膜包括第一和第二堆叠膜，每个具有钉扎层，中间层和自由层，第二堆叠膜形成在第一堆叠膜上。 膜的轨道宽度方向的侧面成形为在膜的厚度方向上的中间位置具有拐点，并且侧面成形为在基板的上方大致垂直于基板 从拐点。 此外，侧面被成形为在从拐点向基板向下方向接近基板的轨迹宽度上逐渐增加。
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47.发明申请公开(公告)号：US20100091413A1
公开(公告)日：2010-04-15
申请号：US12559349
申请日：2009-09-14
CPC分类号： G11B5/1871 , G11B5/1278 , G11B5/232 , G11B5/3116 , G11B5/3163
摘要： According to one embodiment, a magnetic recording head includes a main pole having a throat height portion and a flare portion that is connected to the throat height portion, the flare portion gradually being expanded in width to an upper part in an element height direction. The head also includes a sub pole, magnetic shields disposed via a nonmagnetic layer on a trailing side of the main pole and on both sides in a track width direction of the main pole, and a coil for generating a recording magnetic field from the main pole. The nonmagnetic layer has an upper portion of which the thickness is increased stepwise or in a tapered manner in the element height direction with respect to an ABS side, and each portion of the magnetic shields adjacent to the main pole has a shape corresponding to a surface shape of the nonmagnetic layer.
摘要翻译： 根据一个实施例，磁记录头包括具有喉部高度部分的主极和连接到喉部高度部分的扩张部分，喇叭部分在宽度上逐渐扩大到元件高度方向上的上部。 磁头还包括一个副磁极，通过主磁极的后侧上的非磁性层和主磁极的磁道宽度方向上的两侧设置的磁屏蔽，以及用于从主极产生记录磁场的线圈 。 非磁性层的上部具有相对于ABS侧在元件高度方向上阶梯状或锥形化的增加部分，并且与主极相邻的磁屏蔽的各部分具有与表面对应的形状 非磁性层的形状。
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48.发明申请Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 失效薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器公开(公告)号：US20070217066A1
公开(公告)日：2007-09-20
申请号：US11802297
申请日：2007-05-22
IPC分类号： G11B5/127
CPC分类号： G11B5/3906 , G11B5/1278
摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field exceeding 10 kOe (oersted), while also modified to suppress remanent magnetic fields occurring immediately after writing operation. In a perpendicular magnetic head comprising a main pole, a return path for supplying a magnetic flux to that main pole, and an conductive coil for excitation of the main pole and return path, the main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer, the low saturation flux density layer has a thickness within 0.5 to 5 nanometers, the high saturation flux density layer has a thickness from 10 to 50 nanometers for suppressing remanent magnetization and preventing erasing after writing by utilizing a closed magnetic domain structure in the pole.
摘要翻译： 具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生超过10kOe（奥斯特）的高磁记录场，同时还被修改以抑制写入后立即发生的残留磁场 操作。 在包括主极，用于向该主极提供磁通的返回路径和用于激励主极返回路径的导电线圈的垂直磁头中，主极的极宽为200纳米以下， 以及由高饱和磁通密度层和低饱和磁通密度层组成的磁性层，低饱和磁通密度层的厚度在0.5〜5纳米之间，高饱和磁通密度层的厚度为10〜50纳米， 通过利用极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。
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公开(公告)号：US06937449B2
公开(公告)日：2005-08-30
申请号：US10077854
申请日：2002-02-20
CPC分类号： B82Y10/00 , G11B5/3903 , G11B5/3967
摘要： To provide a spin-valve type magnetic head having high read output even if track width is narrow and high stability, a magnetic head according to the invention is provided with a spin-valve type magnetoresistive element in which a single magnetic domain turning ferromagnetic layer is formed on a soft magnetic free layer via a non-magnetic separating layer, the soft magnetic free layer and the single magnetic domain turning ferromagnetic layer are magnetostatically coupled at the end of track width, a closed magnetic circuit is formed and the soft magnetic layer has magnetization substantially induced in a direction substantially perpendicular to an external magnetic field.
摘要翻译： 为了提供具有高读取输出的自旋阀式磁头，即使磁道宽度窄且稳定性高，根据本发明的磁头设置有自旋阀型磁阻元件，其中单个磁畴转动铁磁层为 通过非磁性分离层形成在软磁自由层上，软磁自由层和单磁畴转动铁磁层在磁道宽度末端被静磁耦合，形成闭合磁路，软磁层具有 在大致垂直于外部磁场的方向上大致感应出磁化。
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公开(公告)号：US06934128B2
公开(公告)日：2005-08-23
申请号：US10916450
申请日：2004-08-12
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/2652 , G11B5/3146 , G11B5/315
摘要： Provided is a thin film single pole head for perpendicular magnetic recording, which has a structure offering a high formatted volume, easy servo, difficulty of influencing a recording pattern on a medium, and capability of shortening processing time. This thin film single pole head for perpendicular magnetic recording is formed on a reproducing head composed of a pair of shield layers formed on a substrate, and a reproducing element formed therebetween. A structure is provided, where an auxiliary pole is not disposed between the reproducing element of the reproducing head and the main pole of a recording head when seen from a surface facing to recording media.
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