公开(公告)号：US08638527B2

公开(公告)日：2014-01-28

申请号：US12589042

申请日：2009-10-16

申请人： Luiz M. Franca-Neto ,  Bernhard E. Knigge ,  Petrus Antonius Van Der Heijden

发明人： Luiz M. Franca-Neto ,  Bernhard E. Knigge ,  Petrus Antonius Van Der Heijden

IPC分类号： G11B5/17

CPC分类号： G11B5/02 ,  G11B5/1278 ,  G11B5/3123 ,  G11B5/314 ,  G11B5/6005 ,  G11B5/6064 ,  G11B2005/0005

摘要： A signaling method and apparatus for providing two write assist components for perpendicular thin film heads writing to high coercivity media is disclosed. The two components provided by the present invention include a media writing assist component and a head switching assist component. Circuit wiring configurations and waveforms for driving an auxiliary half coil are disclosed. These include configurations for connecting the auxiliary half coil in parallel with the main data coil, or connecting the auxiliary half coil to the thermal flight control system. Provision for both common mode signals as well as differential mode signals are disclosed. RF sinusoidal waveforms between 1 and 5 GHz have been found suitable for head switching assist functions for either symmetric current feed and common mode current configuration, or asymmetric current feed and differential mode current configuration. RF sinusoidal waveforms between 10 and 50 GHz have been found suitable for media writing assist functions for either asymmetric or symmetric current feed and differential mode configuration. Data derived signals obtained by passing the data pulse train though high pass filtration has been found to provide both head switching assist and media writing assist functionality. Data derived signals can be used with or without the RF signals.

摘要翻译： 公开了一种用于为垂直薄膜头写入高矫顽力介质的两个写入辅助部件的信令方法和装置。 本发明提供的两个部件包括介质写入辅助部件和磁头切换辅助部件。 公开了用于驱动辅助半线圈的电路布线配置和波形。 这些包括用于将辅助半线圈与主数据线圈并联连接或将辅助半线圈连接到热飞行控制系统的配置。 公开了两种共模信号以及差模信号。 已经发现1到5GHz之间的RF正弦波形适用于对称电流馈电和共模电流配置的头部切换辅助功能，或非对称电流馈电和差分模式电流配置。 已经发现10到50GHz之间的RF正弦波形适用于非对称或对称电流馈送和差分模式配置的介质写入辅助功能。 已经发现通过高通滤波通过数据脉冲串获得的数据导出信号提供了头切换辅助和媒体写入辅助功能。 数据导出信号可以使用或不使用RF信号。

公开(公告)号：US20130301157A1

公开(公告)日：2013-11-14

申请号：US13466970

申请日：2012-05-08

申请人： Qing Dai ,  Bruno Marchon ,  Katsumi Mabuchi ,  Mina Amo

发明人： Qing Dai ,  Bruno Marchon ,  Katsumi Mabuchi ,  Mina Amo

IPC分类号： G11B5/72 ,  B32B9/00 ,  B05D5/12 ,  G11B21/02

CPC分类号： G11B5/84 ,  B32B9/00 ,  G11B5/72 ,  G11B5/746 ,  G11B5/8412 ,  G11B5/855

摘要： In one embodiment, a magnetic recording medium includes a magnetic recording layer including a magnetic material characterized by having convex and concave portions, the convex portions acting as magnetic regions, a nonmagnetic material positioned within each concave portion of the magnetic material which act as nonmagnetic regions that separate the magnetic regions, an organic material layer which exhibits a corrosion-inhibiting characteristic with respect to cobalt or cobalt alloy positioned on a nonmagnetic region side of each concave portion, and an oxide layer and/or hydroxide layer positioned adjacent the organic material layer on a magnetic region side of each concave portion of the magnetic material. In another embodiment, the magnetic recording medium may be a patterned recording layer having a protective film, and the oxide layer and/or hydroxide layer may be positioned at least in defect portions of the protective film.

摘要翻译： 在一个实施例中，磁记录介质包括磁记录层，该磁记录层包括磁性材料，其特征在于具有凸部和凹部，凸部作为磁区，位于磁性材料的每个凹部内的非磁性材料作为非磁性区 分离磁性区域，相对于位于每个凹部的非磁性区域侧的钴或钴合金表现出腐蚀抑制特性的有机材料层和邻近有机材料层定位的氧化物层和/或氢氧化物层 在磁性材料的每个凹部的磁性区域侧。 在另一个实施例中，磁记录介质可以是具有保护膜的图案化记录层，并且氧化物层和/或氢氧化物层可至少位于保护膜的缺陷部分中。

公开(公告)号：US20130279045A1

公开(公告)日：2013-10-24

申请号：US13451284

申请日：2012-04-19

申请人： Hiroshi Agari ,  Hideaki Tanaka ,  Yoshinori Takeuchi ,  Koichi Watanabe ,  Minoru Koike ,  Koji Tanaka

发明人： Hiroshi Agari ,  Hideaki Tanaka ,  Yoshinori Takeuchi ,  Koichi Watanabe ,  Minoru Koike ,  Koji Tanaka

IPC分类号： G11B5/40 ,  G11B5/127

CPC分类号： G11B5/40 ,  G11B5/3133 ,  G11B5/314 ,  G11B5/3967 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0021

摘要： A head for magnetic thermally assisted magnetic data recording, having a read element, a write element a heater element for controlling thermal protrusion of the read and write elements and a thermal sensor for detecting contact a portion of the head with a magnetic media. The thermal contact sensor is arranged so that the thermal conduction between the thermal contact sensor and the read element is substantially equal to the thermal conductivity between the thermal contact sensor and the write element. In this way the accuracy of the detection of thermal contact is maintained whether the read element makes contact with the disk or the write element makes contact with disk.

摘要翻译： 用于磁热辅助磁数据记录的磁头，具有读取元件，写入元件，用于控制读取和写入元件的热突起的加热器元件和用于检测磁头与磁性介质的一部分接触的热传感器。 热接触传感器被布置成使得热接触传感器和读取元件之间的热传导基本上等于热接触传感器和写入元件之间的热导率。 以这种方式，保持读取元件是否与盘接触或者写入元件与盘接触的热接触检测的精度。

公开(公告)号：US20130235491A1

公开(公告)日：2013-09-12

申请号：US13417032

申请日：2012-03-09

申请人： Oleksandr Mosendz ,  Hans J. Richter

发明人： Oleksandr Mosendz ,  Hans J. Richter

IPC分类号： G11B5/60 ,  G11B5/66 ,  B32B15/01 ,  B82Y30/00

CPC分类号： G11B5/66 ,  B82Y30/00 ,  C22C1/02 ,  G11B5/653

摘要： A heat enabled magnetic media having a composite magnetic recording layer structure that includes first and second magnetic layers and an exchange coupling layer sandwiched between the first and second magnetic layers. The exchange coupling layer has a reduced Curie temperature that allows the magnetic layers to become decoupled a lower temperature. This reduced Curie temperature can be achieved the addition of an alloying element such as Ni or Cu into the exchange coupling layer. Therefore, the exchange coupling layer can be constructed of an alloy such as FePtNi FePtCu, and the magnetic layers can be constructed of a material such as FePt.

摘要翻译： 具有包括第一和第二磁性层的复合磁记录层结构和夹在第一和第二磁性层之间的交换耦合层的加热磁性介质。 交换耦合层具有降低的居里温度，其允许磁性层在更低的温度下解耦。 这可以通过将诸如Ni或Cu的合金元素添加到交换耦合层来实现这种降低的居里温度。 因此，交换耦合层可以由诸如FePtNiFePtCu的合金构成，并且磁性层可以由诸如FePt的材料构成。

公开(公告)号：US20130215530A1

公开(公告)日：2013-08-22

申请号：US13401650

申请日：2012-02-21

申请人： Masukazu Igarashi ,  Masato Matsubara ,  Keiichi Nagasaka ,  Masato Shiimoto

发明人： Masukazu Igarashi ,  Masato Matsubara ,  Keiichi Nagasaka ,  Masato Shiimoto

IPC分类号： G11B5/02

CPC分类号： G11B5/3133 ,  G11B5/1278 ,  G11B2005/0024

摘要： In one embodiment, a magnetic data storage system includes a main pole power supply adapted for supplying an excitation current to a main pole coil, a microwave-assisted magnetic recording (MAMR) device including a spin-torque oscillator (STO) element, the STO element having a field generation layer (FGL) and a polarization layer, a timing-control circuit adapted for determining a duration of a main pole magnetic moment inversion process and signaling a start of the main pole magnetic moment inversion process, and a current-regulating circuit comprising an STO power supply adapted for supplying current to the STO element, wherein the STO power supply prevents degradation of a single rotating magnetic domain structure in the FGL into a closure magnetic domain structure in the FGL. Other systems and methods for preventing degradation of the single rotating magnetic domain structure in the FGL into a closure magnetic domain structure are described for more embodiments.

摘要翻译： 在一个实施例中，磁数据存储系统包括适于向主极线圈提供激励电流的主极电源，包括自旋转矩振荡器（STO）元件的微波辅助磁记录（MAMR）器件，STO 具有场产生层（FGL）和偏振层的元件，定时控制电路，用于确定主极磁矩反转处理的持续时间并发出主极磁矩反转处理的开始，以及电流调节 包括适于向STO元件提供电流的STO电源的电路，其中STO电源防止FGL中的单个旋转磁畴结构的劣化成为FGL中的闭合磁畴结构。 对于更多实施例，描述了用于防止FGL中的单个旋转磁畴结构退化成闭合磁畴结构的其它系统和方法。

公开(公告)号：US20130194865A1

公开(公告)日：2013-08-01

申请号：US13361918

申请日：2012-01-30

申请人： Zvonimir Z. Bandic ,  Luiz M. Franca-Neto ,  Cyril Guyot ,  Robert Eugeniu Mateescu

发明人： Zvonimir Z. Bandic ,  Luiz M. Franca-Neto ,  Cyril Guyot ,  Robert Eugeniu Mateescu

IPC分类号： G11C16/06 ,  G11C11/00

CPC分类号： G11C13/0035 ,  G11C11/5628 ,  G11C11/5642 ,  G11C11/5678 ,  G11C13/004 ,  G11C16/26 ,  G11C16/349 ,  G11C2013/0054

摘要： A method and apparatus are provided for implementing enhanced data read for multi-level cell (MLC) memory using threshold-voltage-drift or resistance-drift tolerant moving baseline memory data encoding. A data read back for data written to the MLC memory using threshold-voltage-drift or resistance-drift tolerant moving baseline memory data encoding is performed, higher voltage and lower voltage levels are compared, and respective data values are identified responsive to the compared higher voltage and lower voltage levels.

摘要翻译： 提供了一种用于使用阈值电压漂移或电阻漂移容许移动基线存储器数据编码来实现用于多电平单元（MLC）存储器的增强数据读取的方法和装置。 执行使用阈值电压漂移或电阻漂移容许移动基线存储器数据编码写入MLC存储器的数据的数据读回，比较较高电压和较低电压电平，并且响应于比较的较高电压 电压和低电压电平。

公开(公告)号：US20130194693A1

公开(公告)日：2013-08-01

申请号：US13361896

申请日：2012-01-30

申请人： Mina Amo ,  Katsumi Mabuchi ,  Hiroshi Yoshida ,  Bruno Marchon ,  Qing Dai

发明人： Mina Amo ,  Katsumi Mabuchi ,  Hiroshi Yoshida ,  Bruno Marchon ,  Qing Dai

IPC分类号： G11B21/02 ,  C07D403/14 ,  C07D249/18 ,  C07D403/12 ,  G11B5/65 ,  G11B5/725

CPC分类号： C07D249/18 ,  C07D403/12 ,  C07D403/14 ,  G11B5/725

摘要： According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of wherein Rf is at least one of —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—, with m representing 0 or a positive integer, n representing 0 or a positive integer, and k representing 0 or a positive integer, and wherein R1 to R4 are selected from a group consisting of —H or with at least one of R1 to R4 being

摘要翻译： 根据一个实施方案，润滑剂包括具有以下化学结构的全氟聚醚，其中Rf为-CF 2 O（CF 2 CF 2 O）m（CF 2 O）n CF 2 - 和-CF 2 CF 2 O（CF 2 CF 2 CF 2 O）k CF 2 CF 2 - 中的至少一种，m表示0或正整数 ，n表示0或正整数，k表示0或正整数，并且其中R 1至R 4选自-H或与R 1至R 4中的至少一个为

公开(公告)号：US20130170068A1

公开(公告)日：2013-07-04

申请号：US13339317

申请日：2011-12-28

申请人： Shoji Natori

发明人： Shoji Natori

IPC分类号： G11B21/02 ,  G11B5/39

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  G11B5/6076 ,  G11B2005/3996

摘要： A head for magnetic data recording that includes an embedded contact sensor. The embedded contact sensor detects head disk contact by detecting changes in temperature as a result of contact between the head and the disk. The embedded contact sensor includes a thermoresistive layer and a structure for pinning the magnetic domains of the thermoresistive layer. This pinning of the magnetic domains prevents the thermoresistive layer from changing resistance in response to magnetic fields (rather than temperature) so as to avoid unwanted signal noise as a result of a magnetic signal from the magnetic media.

摘要翻译： 一种磁数据记录头，包括嵌入式接触传感器。 嵌入式触点传感器通过检测由于头部和盘之间的接触而导致的温度变化来检测头盘接触。 嵌入式接触传感器包括热敏层和用于固定热电阻层的磁畴的结构。 磁畴的这种钉扎防止热敏电阻响应于磁场（而不是温度）而改变电阻，以避免由于来自磁性介质的磁信号而导致的不期望的信号噪声。

公开(公告)号：US20130164562A1

公开(公告)日：2013-06-27

申请号：US13335642

申请日：2011-12-22

申请人： Tsann Lin

发明人： Tsann Lin

IPC分类号： G11B5/39 ,  H01F7/06

CPC分类号： G11B5/3906 ,  G01R33/098 ,  G11B5/3163 ,  G11B5/3909 ,  G11B5/398 ,  G11B5/40 ,  H01F10/3254 ,  H01F10/3295 ,  Y10T29/4902 ,  Y10T428/1114 ,  Y10T428/1121 ,  Y10T428/1143

摘要： The invention provides a tunneling magnetoresistance (TMR) read sensor with a long diffusion path and ex-situ interfaces in a sense layer structure. The sense layer structure comprises a first sense layer preferably formed of a ferromagnetic Co—Fe film, a second sense layer preferably formed of a ferromagnetic Co—Fe—B film, and a third sense layer preferably formed of a ferromagnetic Ni—Fe film. The sense layer structure has a long diffusion path (defined as a total thickness of the first and second sense layers) and ex-situ interfaces for suppressing unwanted diffusions of Ni atoms. Alternatively, the sense layer structure comprises a first sense layer preferably formed of a ferromagnetic Co—Fe film, a second sense layer preferably formed of a ferromagnetic Co—Fe—B film, a third sense layer preferably formed of a ferromagnetic Co—Fe—B—Hf film, and a fourth sense layer preferably formed of a ferromagnetic Ni—Fe film.

摘要翻译： 本发明提供了一种在感应层结构中具有长扩散路径和非原位界面的隧道磁阻（TMR）读取传感器。 感测层结构包括优选由铁磁Co-Fe膜形成的第一感测层，优选由铁磁性Co-Fe-B膜形成的第二感测层和优选由铁磁性Ni-Fe膜形成的第三感测层。 感应层结构具有长的扩散路径（定义为第一和第二感测层的总厚度）和用于抑制Ni原子的不期望的扩散的非原位界面。 或者，感测层结构包括优选由铁磁性Co-Fe膜形成的第一感测层，优选由铁磁性Co-Fe-B膜形成的第二感测层，优选由铁磁性Co-Fe-B膜形成的第三感测层， B-Hf膜，以及优选由铁磁性Ni-Fe膜形成的第四感测层。

公开(公告)号：US20130161181A1

公开(公告)日：2013-06-27

申请号：US13333946

申请日：2011-12-21

申请人： Xing-Cai Guo ,  Thomas E. Karis ,  Bruno Marchon ,  Franck D. R. dit Rose ,  Connie H.T. Wiita

发明人： Xing-Cai Guo ,  Thomas E. Karis ,  Bruno Marchon ,  Franck D. R. dit Rose ,  Connie H.T. Wiita

IPC分类号： C23C14/34

CPC分类号： G11B5/8408 ,  C23C14/0605 ,  C23C14/5853 ,  G11B5/851

摘要： A method for manufacturing a magnetic media for magnetic data recording that greatly reduces the time required to manufacture the magnetic media. After constructing the magnetic disk with the desired magnetic media layer, a protective overcoat is deposited on the disk. The disk is then exposed to ozone in order to speed the rate of oxidation of the protective overcoat and thereby reduce the time needed to treat the overcoat. After exposing the overcoat to an ozone a lubrication layer can be applied. This process reduces the time necessary to cure the overcoat from a time of about 24 hours to a time range of 10 seconds to 30 minutes.

摘要翻译： 一种用于制造用于磁数据记录的磁性介质的方法，其大大减少制造磁性介质所需的时间。 在用所需的磁性介质层构造磁盘之后，将保护性外涂层沉积在盘上。 然后将盘暴露于臭氧，以加速保护性外涂层的氧化速率，从而减少处理外涂层所需的时间。 在将外涂层暴露于臭氧之后，可以施加润滑层。 该方法减少了从大约24小时到10秒至30分钟的时间段固化外涂层所需的时间。