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公开(公告)号：US07688535B2
公开(公告)日：2010-03-30
申请号：US11850214
申请日：2007-09-05
IPC: G11B20/14
CPC classification number: G11B5/59633 , G11B5/59688
Abstract: A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.
Abstract translation: 公开了一种用于确定换能器的位置信息的方法。 至少选择第一代码和第二代码。 第一个代码具有与第二个代码不同的特征。 写入第一子轨道的用户数据用第一代码进行编码，并且用第二代码对写入第二子轨道的用户数据进行编码。 获得从第一子轨道读取的第一代码，并且获得从第二子轨道读取的第二代码。 从获得的第一代码的特性和获得的第二代码的特性中提取换能器的位置信息。
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公开(公告)号：US20090059412A1
公开(公告)日：2009-03-05
申请号：US11850214
申请日：2007-09-05
IPC: G11B21/02
CPC classification number: G11B5/59633 , G11B5/59688
Abstract: A method is disclosed for determining position information of a transducer. At least a first code and a second code are chosen. The first code has different characteristics than the second code. User data written to a first sub-track is encoded with the first code and user data written to a second sub-track is encoded with the second code. The first code read from the first sub-track is obtained and the second code read from the second sub-track is obtained. Position information of the transducer is extracted from the obtained characteristics of the first code and the obtained characteristics of the second code.
Abstract translation: 公开了一种用于确定换能器的位置信息的方法。 至少选择第一代码和第二代码。 第一个代码具有与第二个代码不同的特征。 写入第一子轨道的用户数据用第一代码进行编码，并且用第二代码对写入第二子轨道的用户数据进行编码。 获得从第一子轨道读取的第一代码，并且获得从第二子轨道读取的第二代码。 从获得的第一代码的特性和获得的第二代码的特性中提取换能器的位置信息。
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3.发明申请Ultrafast pulse field source utilizing optically induced magnetic transformation 有权利用光学诱导磁变换的超快脉冲场源公开(公告)号：US20050111137A1
公开(公告)日：2005-05-26
申请号：US10718430
申请日：2003-11-20
Applicant: Ganping Ju , Duane Karns , Thomas Ambrose , Rene Johannes Marinus van de Veerdonk
Inventor： Ganping Ju , Duane Karns , Thomas Ambrose , Rene Johannes Marinus van de Veerdonk
IPC: G11B5/00 , G11B5/147 , G11B11/105 , G11C11/16
CPC classification number: G11C11/1675 , G11B11/10534 , G11B2005/0008 , G11B2005/0021 , G11B2005/0034 , G11C11/161
Abstract: A magnetic field transducer includes a phase transition material exhibiting a change from an antiferromagnetic phase to a ferromagnetic phase when heated above a critical temperature, means for applying a magnetic bias field to the phase transition material, and means for heating the phase transition material above the critical temperature. Magnetic recording heads that include the transducer and magnetic disc drives that include the magnetic recording heads are also described. A method of producing a magnetic field pulse including applying a magnetic bias field to a phase transition material, and heating the phase transition material to cause the phase transition material to change from an antiferromagnetic phase to a ferromagnetic phase, is also provided. The phase transition material can comprise a rare earth-transition metal alloy, where the alloy is heated above a compensation temperature.
Abstract translation: 磁场换能器包括在加热到高于临界温度时表现出从反铁磁相到铁磁相的变化的相变材料，用于向相变材料施加磁偏置场的装置，以及用于加热相转变材料上方的相变材料的装置 临界温度。 还描述了包括换能器和包括磁记录头的磁盘驱动器的磁记录头。 还提供了一种产生磁场脉冲的方法，包括对相变材料施加磁偏置场，并加热相变材料以使相变材料从反铁磁相变为铁磁相。 相变材料可以包括稀土 - 过渡金属合金，其中合金被加热到高于补偿温度。
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4.发明授权Magnetic recording media with discrete tracks of magnetic material in a magnetically soft underlayer 失效磁性记录介质，具有磁性材料的磁性软底层离散轨迹公开(公告)号：US07394622B2
公开(公告)日：2008-07-01
申请号：US11005819
申请日：2004-12-07
Applicant: Edward Charles Gage , Gary Clark Rauch , Rene Johannes Marinus van de Veerdonk , Hans Juergen Richter , Terry Wayne McDaniel , Mark H. Kryder
Inventor： Edward Charles Gage , Gary Clark Rauch , Rene Johannes Marinus van de Veerdonk , Hans Juergen Richter , Terry Wayne McDaniel , Mark H. Kryder
IPC: G11B5/82
Abstract: A magnetic recording medium comprises a magnetically soft underlayer having a plurality of cavities in a surface thereof, and a magnetic recording material in the cavities, wherein a surface of the magnetic recording material in the cavities is substantially coplanar with the surface of the soft underlayer. A recording system that includes the recording medium is also included.
Abstract translation: 磁记录介质包括在其表面具有多个空腔的磁软底层和空腔中的磁记录材料，其中空腔中的磁记录材料的表面与软底层的表面基本上共面。 还包括包括记录介质的记录系统。
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5.发明授权公开(公告)号：US07128987B2
公开(公告)日：2006-10-31
申请号：US10337103
申请日：2003-01-06
Applicant: Rene Johannes Marinus van de Veerdonk , Duane Clifford Karns , Dieter Klaus Weller , Yukiko Kubota
Inventor： Rene Johannes Marinus van de Veerdonk , Duane Clifford Karns , Dieter Klaus Weller , Yukiko Kubota
CPC classification number: G11B5/66
Abstract: Multilayer magnetic structures comprising composite layers and spacer layers are disclosed. The composite layers include a discontinuous magnetic phase such as Co, Ni or Fe platelets, and a continuous nonmagnetic phase such as C, AlOx, SiOx, ZrOx, Cu, Ag and Au. The spacer layers may comprise Pt, Pd, Au or the like. The composite layers and spacer layers may be made by sputtering. The multilayer structures are useful as magnetic recording layers of magnetic recording media. In one embodiment, the recording media comprises a perpendicular magnetic recording medium including a substrate, a soft magnetic underlayer, a seed layer and the multilayer structure.
Abstract translation: 公开了包括复合层和间隔层的多层磁性结构。 复合层包括不连续的磁性相，例如Co，Ni或Fe片晶，以及连续的非磁性相如C，AlO x，SiO x x，ZrO 3， x，Cu，Ag和Au。 间隔层可以包括Pt，Pd，Au等。 复合层和间隔层可以通过溅射制成。 多层结构可用作磁记录介质的磁记录层。 在一个实施例中，记录介质包括垂直磁记录介质，其包括基底，软磁性底层，种子层和多层结构。
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Patent Agency Ranking
公开(公告)号：US07041394B2
公开(公告)日：2006-05-09
申请号：US10005244
申请日：2001-12-03
Applicant: Dieter Klaus Weller , Neil Deeman , Rene Johannes Marinus van de Veerdonk , Nisha Shukla
IPC: G11B5/64
CPC classification number: G11B5/855 , G11B5/746 , G11B5/82 , G11B2005/0002
Abstract: A magnetic recording disc is provided according to the present invention for magnetic recording. The magnetic recording disc includes a disc substrate having a locking pattern etched therein. Chemically synthesized iron-platinum particles are provided in the locking pattern and completely fill the locking pattern. The chemically synthesized iron-platinum nanoparticles exhibit short-range order characteristics forming self organized magnetic arrays.
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7.发明授权Magnetic read head wherein the shields are used as electrical leads and have a minimized anisotropic magneto-resistance effect 有权磁读头，其中屏蔽用作电引线并且具有最小化的各向异性磁阻效应公开(公告)号：US06807032B1
公开(公告)日：2004-10-19
申请号：US09776435
申请日：2001-02-02
Applicant: Michael Allen Seigler , Isabel Goncalves Trindade , Petrus Antonius Van der Heijden , Michael Kevin Minor , Mark William Covington , Rene' Johannes Marinus van de Veerdonk , Sharat Batra , Robert Earl Rottmayer
Inventor： Michael Allen Seigler , Isabel Goncalves Trindade , Petrus Antonius Van der Heijden , Michael Kevin Minor , Mark William Covington , Rene' Johannes Marinus van de Veerdonk , Sharat Batra , Robert Earl Rottmayer
IPC: G11B5127
CPC classification number: G11B5/3912
Abstract: A ferromagnetic shield material having a minimized anisotropic magneto-resistance effect permits the use of a combined shield/electrical lead for magneto-resistive read elements. The shields/electrical leads may therefore be placed closer together, maximizing the recording density that may be read by a magnetic recording head using a read element having such shields/leads.
Abstract translation: 具有最小化的各向异性磁阻效应的铁磁屏蔽材料允许使用用于磁阻读取元件的组合屏蔽/电引线。 因此，屏蔽/电引线可以放置得更靠近在一起，使得使用具有这种屏蔽/引线的读取元件可以使磁记录头读取的记录密度最大化。
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公开(公告)号：US08730604B2
公开(公告)日：2014-05-20
申请号：US13173861
申请日：2011-06-30
CPC classification number: G11B5/59616 , G11B5/5965 , G11B5/746 , G11B2005/0005 , G11B2220/252
Abstract: A given reference pattern is written on bit patterned media that has an initial reference pattern already disposed thereon. A write phase and frequency is detected based on the initial reference pattern and the given reference pattern is written on the bit patterned media at the detected write phase and frequency.
Abstract translation: 给定的参考图案被写在具有已经设置在其上的初始参考图案的位图案介质上。 基于初始参考图案检测写入相位和频率，并且在检测到的写入相位和频率上将给定的参考图案写入位图案化媒体。
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公开(公告)号：US07864470B2
公开(公告)日：2011-01-04
申请号：US11870858
申请日：2007-10-11
Applicant: Kaizhong Gao , Olle G. Heinonen , Rene Johannes Marinus Van De Veerdonk
IPC: G11B5/09
Abstract: Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.
Abstract translation: 记录介质包括沿着记录轨道的长度依次放置在不同的第一和第二半径处的多个第一和第二图案化介质岛。 当磁头沿记录磁道的长度移动时，记录头依次访问第一和第二岛。 沿着轨道长度的顺序第一和第二岛之间的周长间隔作为轨道半径的偏斜函数而变化。
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公开(公告)号：US20090097152A1
公开(公告)日：2009-04-16
申请号：US11870858
申请日：2007-10-11
Applicant: Kaizhong Gao , Olle G. Heinonen , Rene Johannes Marinus Van de Veerdonk
IPC: G11B5/00
Abstract: Recording media comprises multiple first and second patterned media islands sequentially placed at different first and second radii along a length of a recording track. A recording head sequentially accesses the first and second islands as the head moves along a length of the recording track. Circumferential spacings between sequential first and second islands along the length of the track vary as a skew function of a track radius.
Abstract translation: 记录介质包括沿着记录轨道的长度依次放置在不同的第一和第二半径处的多个第一和第二图案化介质岛。 当磁头沿记录磁道的长度移动时，记录头依次访问第一和第二岛。 沿着轨道长度的顺序第一和第二岛之间的周长间隔作为轨道半径的偏斜函数而变化。
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