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公开(公告)号：US20090059409A1
公开(公告)日：2009-03-05
申请号：US12230307
申请日：2008-08-27
摘要： The magnetic recording and reproducing apparatus includes: a perpendicular recording magnetic recording medium including a track pattern including track portions and gap portions arranged so as to be alternately adjacent to each other in a cross-track direction, at least part of portions corresponding to the track portions being recording areas having the width substantially the same as the width of the track portions, portions between the recording areas being non-recording areas; and a magnetic head of a perpendicular recording type for applying a recording magnetic field to the recording areas. The anisotropic magnetic field Hk (T) of the recording areas of the magnetic recording medium and the recording magnetic field intensity Fw (t) of the recording magnetic field at the upper surface of the recording areas satisfy the following inequality (I): 0.23×Fw+1.2≦Hk≦0.26×Fw+1.6. (I)
摘要翻译： 磁记录和再现装置包括：垂直记录磁记录介质，其包括轨道图案，该轨道图案包括轨道部分和间隔部分，所述轨道部分和间隙部分沿交叉轨道方向彼此交替相邻布置，至少部分对应于轨道 部分是具有与轨道部分的宽度基本相同的宽度的记录区域，记录区域之间的部分是非记录区域; 以及用于将记录磁场施加到记录区域的垂直记录类型的磁头。 磁记录介质的记录区域的各向异性磁场Hk（T）和记录区域上表面的记录磁场的记录磁场强度Fw（t）满足以下不等式（I）：< in-line-formula description =“In-line Formulas”end =“lead”？> 0.23xFw + 1.2 <= Hk <= 0.26xFw + 1.6。 （I）<？in-line-formula description =“In-line Formulas”end =“tail”？>
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12.发明授权Magnetic recording and reproducing system with recording layer having predetermined convex-concave pattern 失效具有记录层的具有预定凸凹图案的磁记录和再现系统公开(公告)号：US07403353B2
公开(公告)日：2008-07-22
申请号：US11333505
申请日：2006-01-18
摘要： The invention is directed to a magnetic recording/reproducing system wherein each burst pattern in discrete media is configured in a substantially trapezoidal shape (truncated quadrangular pyramid shape, and which satisfies given relations between W1, W2, Tp and Wr. W1 is the upper side of the trapezoidal shape in the track width direction, which corresponds to the surface of said convex-form magnetic recoding layer, W2 is the lower side of the trapezoidal shape in the track width direction, which corresponds to the bottom surface of said convex-form magnetic layer, Tp is the data track pitch at the data information recording portion, and Wr is the read width of the magnetic head, so that loads on burst pattern shape in medium fabrication processes can be far more reduced and far more precise position error signals can be obtained.
摘要翻译： 本发明涉及一种磁记录/再现系统，其中离散介质中的每个突发图案被配置为基本上梯形的形状（截顶四棱锥形状，并且满足W 1，W 2，Tp和Wr之间的给定关系W 1为 对应于所述凸形磁记录层的表面的轨道宽度方向上的梯形形状的上侧W 2是轨道宽度方向上的梯形形状的下侧，其对应于 所述凸形磁性层Tp是数据信息记录部分的数据磁道间距，Wr是磁头的读取宽度，因此在介质制造工艺中的突发图案形状上的负载可以进一步减少和远远多于 可以获得精确的位置误差信号。
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公开(公告)号：US20070008639A1
公开(公告)日：2007-01-11
申请号：US11333505
申请日：2006-01-18
摘要： The invention is directed to a magnetic recording/reproducing system wherein each burst pattern in discrete media is configured in a substantially trapezoidal shape (truncated quadrangular pyramid shape, and which satisfies given relations between W1, W2, Tp and Wr. W1 is the upper side of the trapezoidal shape in the track width direction, which corresponds to the surface of said convex-form magnetic recoding layer, W2 is the lower side of the trapezoidal shape in the track width direction, which corresponds to the bottom surface of said convex-form magnetic layer, Tp is the data track pitch at the data information recording portion, and Wr is the read width of the magnetic head, so that loads on burst pattern shape in medium fabrication processes can be far more reduced and far more precise position error signals can be obtained.
摘要翻译： 本发明涉及一种磁记录/再现系统，其中离散介质中的每个突发图案被配置为基本上梯形的形状（截顶四棱锥形状，并且满足W 1，W 2，Tp和Wr之间的给定关系W 1为 对应于所述凸形磁记录层的表面的轨道宽度方向上的梯形形状的上侧W 2是轨道宽度方向上的梯形形状的下侧，其对应于 所述凸形磁性层Tp是数据信息记录部分的数据磁道间距，Wr是磁头的读取宽度，因此在介质制造工艺中的突发图案形状上的负载可以进一步减少和远远多于 可以获得精确的位置误差信号。
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14.发明申请公开(公告)号：US20060040140A1
公开(公告)日：2006-02-23
申请号：US11200487
申请日：2005-08-10
摘要： A perpendicular recording type, magnetic recording medium having a soft magnetic layer and a magnetic recording/reproducing apparatus including such a magnetic recording medium are provided. The magnetic recording medium allows the recording magnetic field to be efficiently applied to a track for recording while restricting the extent of the recording magnetic field. The magnetic recording medium has a soft magnetic layer and a recording layer formed in this order on a substrate. The soft magnetic layer has its part on the opposite side to the substrate formed in a concavo-convex pattern. The recording layer is oriented to have magnetic anisotropy in the direction perpendicular to the surface. A fixing layer for fixing the magnetic anisotropy of the soft magnetic layer in a predetermined direction parallel to the surface is provided between the recording layer and the soft magnetic layer.
摘要翻译： 提供具有软磁性层的垂直记录型磁记录介质和包括这种磁记录介质的磁记录/重放装置。 磁记录介质允许将记录磁场有效地施加到用于记录的轨道，同时限制记录磁场的范围。 磁记录介质具有在基板上依次形成的软磁性层和记录层。 软磁性层的一部分与形成为凹凸图案的基板相反。 记录层取向为在垂直于表面的方向上具有磁各向异性。 在记录层和软磁性层之间设置用于将软磁性层的磁各向异性固定在与表面平行的规定方向上的固定层。
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15.发明授权Manufacturing method of silicon spin transport device and silicon spin transport device 有权硅自旋输送装置和硅自旋输送装置的制造方法公开(公告)号：US08481337B2
公开(公告)日：2013-07-09
申请号：US12690566
申请日：2010-01-20
申请人： Tomoyuki Sasaki , Tohru Oikawa , Katsumichi Tagami
发明人： Tomoyuki Sasaki , Tohru Oikawa , Katsumichi Tagami
IPC分类号： H01L43/00
CPC分类号： H01L29/66984 , H01L29/0657 , H01L29/0684
摘要： An object of the present invention is to provide a silicon spin transport device manufacturing method and silicon spin transport device whereby improved voltage output characteristics can be obtained. The silicon spin transport device manufacturing method comprises: a first step of patterning a silicon film by wet etching and forming a silicon channel layer; and a second step of forming a magnetization free layer and a magnetization fixed layer, which are apart from each other, on the silicon channel layer.
摘要翻译： 本发明的目的是提供一种硅自旋传输装置的制造方法和硅自旋传输装置，从而可获得改进的电压输出特性。 硅自旋传输器件的制造方法包括：通过湿蚀刻图案化硅膜并形成硅沟道层的第一步骤; 以及在硅沟道层上形成彼此分开的无磁化层和磁化固定层的第二步骤。
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16.发明授权Magnetic recording and reproducing apparatus with trapeziodal write pole tip to avoid overwriting adjacent tracks 失效具有梯形写磁头的磁记录和再现装置，以避免重写相邻轨道公开(公告)号：US07215502B2
公开(公告)日：2007-05-08
申请号：US11136372
申请日：2005-05-25
申请人： Katsumichi Tagami
发明人： Katsumichi Tagami
IPC分类号： G11B5/187
CPC分类号： B82Y10/00 , G11B5/1278 , G11B5/1872 , G11B5/5539 , G11B5/743 , G11B5/82
摘要： A magnetic recording and reproducing apparatus includes a magnetic head having a main magnetic pole, a magnetic recording medium of a discrete type having a predetermined convex-concave structure at data tracks and servo tracks, and a drive device body that can operate to rotationally drive the magnetic recording medium in a constant direction and cause the magnetic head to be movable in substantially radial directions of the magnetic recording medium. A relationship among parameters specifying a predetermined convex-concave shape of the data track, parameters specifying the main magnetic pole, and a skew angle is defined by a predetermined inequality. By setting a specification of the magnetic recording and reproducing apparatus in the range defined by the inequality, it is possible to prevent unwanted writing into the adjacent track to thereby realize high-density recording having extremely high reliability.
摘要翻译： 一种磁记录和再现装置，包括具有主磁极的磁头，在数据磁道和伺服磁道上具有预定的凸凹结构的分立型磁记录介质，以及驱动装置本体，可驱动旋转驱动 磁记录介质，并使磁头能够在磁记录介质的大致半径方向上移动。 通过预定的不等式定义指定数据轨道的预定凸凹形状的参数之间的关系，指定主磁极的参数和倾斜角度之间的关系。 通过在由不等式限定的范围内设定磁记录和再现装置的规格，可以防止对相邻轨道的不希望的写入，从而实现具有极高可靠性的高密度记录。
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17.发明授权Method for preventing reduction in a reproduced output of a servo signal in a magnetic recording medium 失效防止磁记录介质中的伺服信号的再生输出减少的方法公开(公告)号：US07209313B2
公开(公告)日：2007-04-24
申请号：US11135510
申请日：2005-05-24
申请人： Katsumichi Tagami
发明人： Katsumichi Tagami
CPC分类号： G11B5/59633
摘要： Servo regions are re-magnetized in the present invention. A magnetic storage device measures a first amount which is indicative of the magnitude of magnetization of a servo region, by a read head portion. The first amount may be a reproduced output, or an inverse of a gain used in an automatic gain control, etc. Servo regions are re-magnetized by a write head portion, when a servo region is detected in which a ratio of the measured first amount to an initial value of the first amount is smaller than a predetermined value, i.e., it is determined that the magnetization is reduced.
摘要翻译： 伺服区域在本发明中被重新磁化。 磁存储装置通过读头部测量指示伺服区的磁化强度的第一量。 第一量可以是再现输出，或者是在自动增益控制中使用的增益的倒数等。当检测到伺服区域时，伺服区域被写入头部重新磁化，其中测量的第一 等于第一量的初始值小于预定值，即确定磁化减小。
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18.发明授权公开(公告)号：US07136252B2
公开(公告)日：2006-11-14
申请号：US11113199
申请日：2005-04-25
申请人： Katsumichi Tagami
发明人： Katsumichi Tagami
IPC分类号： G11B5/62
CPC分类号： G11B5/855 , B82Y10/00 , G11B5/1278 , G11B5/743 , G11B5/82
摘要： In the present invention, with respect to a convex-concave structure necessary for respective functions of a servo area in a perpendicular magnetic recording medium, a specification of configuration and magnetic property of a convex-concave magnetic layer of the perpendicular magnetic recording medium is set so as to overcome a demagnetizing field that accelerates thermal fluctuation. Therefore, in a magnetic recording and reproducing apparatus using the perpendicular magnetic recording medium having servo tracking signals at convex portions of the magnetic layer formed in a convex-concave pattern, it is possible to suppress degradation of the servo signals caused by the thermal fluctuation to thereby ensure a stable servo function over the long term.
摘要翻译： 在本发明中，对于垂直磁记录介质中的伺服区域的功能所需的凸凹结构，设定垂直磁记录介质的凸凹磁性层的结构和磁特性的规定 以克服加速热波动的退磁场。 因此，在使用在凸凹图案形成的磁性层的凸部处具有伺服跟踪信号的垂直磁记录介质的磁记录和再现装置中，可以抑制由热波动引起的伺服信号的劣化 从而确保长期稳定的伺服功能。
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19.发明申请公开(公告)号：US20060132972A1
公开(公告)日：2006-06-22
申请号：US11300277
申请日：2005-12-15
申请人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
发明人： Katsumichi Tagami , Tatsuya Harada , Hiroki Matsukuma , Tetsuya Roppongi , Susumu Aoki , Kazumasa Fukuda , Naoto Matono
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1872
摘要： A thin-film magnetic head with which an error rate is decreased due to a reduction of a jitter without significant decrease in write field, is provided. The head comprises at least one inductive write head element comprising: a main magnetic pole layer having an inner saturation magnetic flux density varying from both side end surfaces in a track-width direction and a leading end surface, toward a center portion in the track-width direction of a trailing end surface; an auxiliary magnetic pole layer; and at least one coil layer, a curvature width WC of a contour line of a write field adjacent to a trailing edge on an ABS side of the main magnetic pole layer satisfying the following expression: −0.15*WT=WC
摘要翻译： 提供了一种薄膜磁头，其由于抖动的减小而不会在写入场中显着降低而误差率降低。 头包括至少一个感应写头元件，包括：主磁极层，具有从轨道宽度方向和前端表面的两个侧端面朝着轨道宽度方向的中心部分变化的内部饱和磁通密度， 后端面的宽度方向; 辅助磁极层; 以及至少一个线圈层，与主磁极层的ABS侧的后缘相邻的写入场的轮廓线的曲率宽度W C C满足以下表达式：-0.15 * 其中W T是轨道宽度，W C和W的单位是W 是纳米。
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公开(公告)号：US20100314702A1
公开(公告)日：2010-12-16
申请号：US12796034
申请日：2010-06-08
IPC分类号： H01L29/82
CPC分类号： H01L29/66984 , G11C11/161 , G11C11/1673 , G11C11/1675
摘要： A spin transport device is provided, which includes a channel comprised of a semiconductor material, a magnetization fixed layer arranged on the channel via a first insulating layer, a magnetization free layer arranged on the channel via a second insulating layer, and first and second electrodes arranged on the channel, wherein carrier densities of a first region of the channel including a contact surface with the first insulating layer, a second region of the channel including a contact surface with the second insulating layer, a third region of the channel including an opposite surface to the first electrode, and a fourth region of the channel including an opposite surface to the second electrode are higher than an average carrier density of the whole channel. Accordingly, a spin transport device that can realize good spin transportation and electric resistance characteristics while suppressing the scattering of spin can be provided.
摘要翻译： 提供自旋传输装置，其包括由半导体材料构成的通道，经由第一绝缘层布置在通道上的磁化固定层，经由第二绝缘层布置在通道上的无磁化层，以及第一和第二电极 布置在通道上，其中通道的第一区域的载流子密度包括与第一绝缘层的接触表面，通道的第二区域包括与第二绝缘层的接触表面，通道的第三区域包括相对的 并且包括与第二电极相反的表面的沟道的第四区域高于整个通道的平均载流子密度。 因此，可以提供能够在抑制旋转散射的同时实现良好的自旋运输和电阻特性的自旋输送装置。
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