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公开(公告)号：US10984822B2
公开(公告)日：2021-04-20
申请号：US16928971
申请日：2020-07-14
发明人： Mats Oberg , Hao Fang
摘要： The present disclosure describes aspects of pulse-based writing for magnetic storage media. In some aspects, a pulse-based writer of magnetic storage media determines that a string of data bits having a same polarity corresponds to a magnet longer than a threshold associated with a magnetic media writer. The pulse-based writer inserts, into the string of data bits, a transition to a polarity opposite to the same polarity of the string of data bits. The string of data bits including the inserted transition is then transmitted to the magnetic media writer to cause a write head of the writer to pulse while writing the magnet to magnetic storage media. Various aspects may also implement a control signal to mask a transition or control polarity of the magnetic media writer. By so doing, magnets may be written to the magnetic storage media more efficiently or with less distortion to neighboring tracks.
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公开(公告)号：US10803899B2
公开(公告)日：2020-10-13
申请号：US16557035
申请日：2019-08-30
发明人： Koji Ishii
摘要： A magnetic disk device includes a control circuit, and a disk unit including a plurality of magnetic disks, a plurality of magnetic heads configured to read or write data from or to the magnetic disks, a first actuator configured to move the magnetic heads, a plurality of second actuators each configured to move the corresponding magnetic head, and a switch circuit configured to connect the control circuit and one of the second actuators. The control circuit is configured to transmit to the disk unit an instruction in which one of the magnetic heads is specified, control one of the second actuators corresponding to the specified magnetic head to move the magnetic head via the switch circuit, and based on a signal from the one of the second actuators, determine whether an error occurs in the one of the second actuators.
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3.发明授权公开(公告)号：US10777225B2
公开(公告)日：2020-09-15
申请号：US16018915
申请日：2018-06-26
摘要： Disclosed herein are methods of using embedded disconnected circuits (EDC) in magnetic storage media to assist in reading data from and writing data to the magnetic storage media. A wireless activation signal is used to activate an EDC in a magnetic storage media. Once activated, the EDC may assist to record data in and/or read data from one or more memory locations of the magnetic storage media.
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公开(公告)号：US10714142B2
公开(公告)日：2020-07-14
申请号：US16126422
申请日：2018-09-10
发明人： Makoto Segawa , Fuyuki Tawada , Osamu Yoshida
摘要： According to one embodiment, a disk device includes a disk, a head that performs data read/write processing on a recording region of the disk, a controller that performs a media scan processing for detecting the presence or absence of a defect in a sector in the recording region of the disk in track unit. When the controller performs the media scan processing on a first sector and a second sector arranged in the track, and a third sector arranged between the first sector and the second sector, the controller performs skip processing in which the controller scans the first sector and the second sector, and does not scan the third sector.
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公开(公告)号：US10109309B1
公开(公告)日：2018-10-23
申请号：US15694276
申请日：2017-09-01
IPC分类号： G11B5/73 , G11B5/708 , G11B5/706 , G11B13/08 , G11B5/49 , G11B5/738 , H01F10/10 , H01F10/12 , G11B5/00
摘要： A heat-assisted magnetic recording (HAMR) medium includes a perpendicular magnetic recording layer (typically a chemically-ordered FePt alloy), a seed/thermal barrier layer (typically MgO) below the recording layer, and a heat-sink layer with anisotropic thermal conductivity below the seed/thermal barrier layer. The in-plane thermal conductivity of the heat-sink layer is greater than its out-of-plane thermal conductivity. The heat-sink layer may be selected from hexagonal boron nitride (h-BN), hexagonal graphite, and the 6H polytype of hexagonal silicon carbide (6H-SiC). If the heat-sink layer is h-BN, the h-BN layer is formed on a seed layer and has its c-axis oriented out-of-plane (substantially orthogonal to the surface of the medium substrate).
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公开(公告)号：US09773517B2
公开(公告)日：2017-09-26
申请号：US14685417
申请日：2015-04-13
发明人： Kaizhong Gao , Edward Gage , Huaqing Yin , Yonghua Chen
CPC分类号： G11B5/4984 , G11B5/012 , G11B5/1278 , G11B5/3116 , G11B5/4886
摘要： A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium.
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公开(公告)号：US09437251B1
公开(公告)日：2016-09-06
申请号：US14579785
申请日：2014-12-22
发明人： Steven C. Rudy , Luc Ving Chung , Christopher L. Beaudry , Shaoping Li , Jimmy J. Shen , Guolun Hao , Yingbo Zhang
CPC分类号： G11B5/3163 , G11B5/115 , G11B5/1272 , G11B5/29 , G11B5/3912 , G11B5/3951 , G11B5/3977 , G11B5/4886 , G11B5/4976 , G11B5/6094 , G11B33/1493 , Y10T29/49032
摘要： A method of making a magnetic head is provided. The method includes forming a first read sensor and a first electrical contact formed with a first shunt region. The method further includes forming a first mid-shield layer on the first read sensor, the first mid-shield layer being electrically connected to the first electrical contact. Additionally the method also includes forming a second mid-shield layer over the first mid-shield layer. Further, the method also includes forming a second read sensor over the second mid-shield layer, the second read sensor having a second electrical contact formed with a second shunt region electrically connected to the first shunt region.
摘要翻译： 提供一种制造磁头的方法。 该方法包括形成第一读取传感器和形成有第一分流区域的第一电触头。 该方法还包括在第一读取传感器上形成第一中间屏蔽层，第一中间屏蔽层电连接到第一电触点。 另外，该方法还包括在第一中间屏蔽层之上形成第二中间屏蔽层。 此外，该方法还包括在第二中间屏蔽层上形成第二读取传感器，第二读取传感器具有形成有电连接到第一分流区域的第二分流区域的第二电触点。
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8.发明授权Disk drive employing multiple read elements to increase radial band for two-dimensional magnetic recording 有权磁盘驱动器采用多个读取元件来增加二维磁记录的径向带公开(公告)号：US09245556B2
公开(公告)日：2016-01-26
申请号：US14203358
申请日：2014-03-10
发明人： Donald Brunnett , Gerardo A. Bertero , Shaoping Li
CPC分类号： G11B5/4969 , G11B5/012 , G11B5/4886 , G11B5/4976 , G11B5/5539
摘要： A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head comprising at least three read elements including a first read element, a second read element, and a third read element. When the head is within a first radial band of the disk, data recorded on the disk is detected using the first read element and the second read element. When the head is within a second radial band of the disk different from the first radial band, data recorded on the disk is detected using the first read element and the third read element. The first read element is substantially aligned down-track with the third read element when the head is over a first radial location of the disk.
摘要翻译： 公开了一种磁盘驱动器，包括包括多个磁道的磁盘，以及包括至少三个读取元件的磁头，包括第一读取元件，第二读取元件和第三读取元件。 当磁头位于磁盘的第一径向带内时，使用第一读取元件和第二读取元件检测记录在磁盘上的数据。 当磁头位于不同于第一径向磁带的盘的第二径向带内时，使用第一读取元件和第三读取元件检测记录在盘上的数据。 当磁头位于磁盘的第一径向位置时，第一读取元件与第三读取元件基本上对准。
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9.发明授权公开(公告)号：US09171558B2
公开(公告)日：2015-10-27
申请号：US14152974
申请日：2014-01-10
CPC分类号： G11B5/3163 , G11B5/29 , G11B5/3909 , G11B5/3912 , G11B5/3932 , G11B5/3958 , G11B5/4886 , G11B5/4976
摘要： A magnetic head includes a plurality of reproducing elements so that the magnetic head can acquire reproduction signals from a plurality of tracks at the same time. The magnetic head includes a first reproducing element, a first magnetic film formed on a first side wall of the first reproducing element with a first side wall insulating film interposed therebetween, a second magnetic film formed on a second side wall of the first reproducing element with a second side wall insulating film interposed therebetween, a second reproducing element electrically isolated from the first reproducing element and formed on the first magnetic film, a third magnetic film formed on the first magnetic film, and a fourth magnetic film formed on the first reproducing element and electrically isolated from the second reproducing element.
摘要翻译： 磁头包括多个再现元件，使得磁头可以同时从多个轨道获取再现信号。 磁头包括第一再现元件，形成在第一再现元件的第一侧壁上的第一磁性膜，其间插入有第一侧壁绝缘膜，形成在第一再现元件的第二侧壁上的第二磁性膜， 介于其间的第二侧壁绝缘膜，与第一再现元件电隔离并形成在第一磁性膜上的第二再现元件，形成在第一磁性膜上的第三磁性膜和形成在第一再现元件上的第四磁性膜 并且与第二再现元件电隔离。
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公开(公告)号：US06970325B2
公开(公告)日：2005-11-29
申请号：US10279342
申请日：2002-10-24
申请人： Tadashi Ozue
发明人： Tadashi Ozue
CPC分类号： G11B5/4976
摘要： A linear tape system has a multi-reproducing head MRh comprising a plurality of reproducing heads Rh each of which corresponds to one recording track Tr. Each reproducing head of the multi-reproducing head is arranged with a displacement in a width direction of the recording track. An entire width MRhw of the multi-reproducing head is enlarged larger than a width Trw of the recording track. In this manner, the linear tape system can reproduce the recording track recorded in a narrow width and provide a higher recording density.
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