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公开(公告)号：US09653105B2
公开(公告)日：2017-05-16
申请号：US12882053
申请日：2010-09-14
Applicant: Rajiv Y Ranjan , Jeffrey S Reiter , Thomas P Nolan
Inventor： Rajiv Y Ranjan , Jeffrey S Reiter , Thomas P Nolan
CPC classification number: G11B5/851 , C23C14/165 , C23C14/185 , C23C14/205 , C23C14/352 , C23C14/568
Abstract: A method of forming a uniform thickness layer of a selected material on a surface of a substrate comprises steps of: (a) providing a multi-stage cathode sputtering apparatus comprising a group of spaced-apart cathode/target assemblies and a means for transporting at least one substrate/workpiece past each cathode/target assembly, each cathode/target assembly comprising a sputtering surface oriented substantially parallel to the first surface of the substrate during transport past the group of cathode/target assemblies, the group of cathode/target assemblies adapted for providing different angular sputtered film thickness profiles; and (b) transporting the substrate past each cathode/target assembly while providing different sputtered film thickness profiles from at least some of the cathode/target assemblies, such that a plurality of sub-layers is deposited on the surface of the substrate/workpiece which collectively form a uniform thickness layer of the selected material.
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公开(公告)号：US09093101B2
公开(公告)日：2015-07-28
申请号：US13037288
申请日：2011-02-28
Applicant: Jai-Young Kim , Thomas P. Nolan , Kyongha Kang , Shoutao Wang , Vincent D. Nguyen , Abebe Hailu , Charles C. Chen
Inventor： Jai-Young Kim , Thomas P. Nolan , Kyongha Kang , Shoutao Wang , Vincent D. Nguyen , Abebe Hailu , Charles C. Chen
CPC classification number: G11B5/82 , G11B5/66 , G11B5/7325 , G11B5/851
Abstract: A stack including a crystallographic orientation interlayer, a magnetic zero layer disposed on the interlayer, and a magnetic recording layer disposed on the magnetic zero layer is disclosed. The magnetic zero layer is non-magnetic or has a saturation magnetic flux density (Bs) less than about 100 emu/cc. The magnetic zero layer and the magnetic layer include grains surrounded by a non-magnetic segregant. The magnetic zero layer provides a coherent interface between the interlayer and the magnetic layer with a lattice mismatch less than about 4%.
Abstract translation: 公开了一种包括晶体取向中间层，设置在中间层上的磁性零层和设置在磁性零层上的磁记录层的堆叠。 磁性零层是非磁性的或具有小于约100emu / cc的饱和磁通密度（Bs）。 磁性零层和磁性层包括由非磁性分离器包围的晶粒。 磁性零层在中间层和磁性层之间提供具有小于约4％的晶格失配的相干界面。
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公开(公告)号：US5105196A
公开(公告)日：1992-04-14
申请号：US659226
申请日：1991-02-22
Applicant: Thomas P. Nolan , Charles B. Branch
Inventor： Thomas P. Nolan , Charles B. Branch
Abstract: An alignment procedure to insure the proper and faithful reproduction of the automatic control loop SERial DAta (SERDA) instructions issued by the Pulse Amplitude and Timing COntrol Unit (PATCO). This reproduction takes place during high level, multipulsed, radio frequency energy transfer to the antenna system. The precise reproduction of the low level digital pulse shape and timing instructions will insure that the transmitter set is operating within the constraints of the International Telecommunications Union for radio transmissions and the specifications which govern the original design during "automatic operation" at a specified Envelope to Cycle Difference (ECD). The alignment procedure once accomplished allows for a simplified monitoring technique, to insure continued proper operation. This monitoring and correction routine can be accomplished using personnel of less technical expertise and test equipments of less complexity and cost.
Abstract translation: 确保正确和忠实地再现由脉冲幅度和定时控制单元（PATCO）发出的自动控制回路SERAL DATA（SERDA）指令的校准程序。 这种再现在高电平，多脉冲，射频能量传输到天线系统期间发生。 低电平数字脉冲形状和定时指令的精确再现将确保发射机组在国际电信联盟的无线电传输的限制内运行，以及在指定的信封的“自动操作”期间控制原始设计的规范， 周期差（ECD）。 完成的对准过程允许简化的监控技术，以确保持续正常操作。 该监测和校正程序可以使用较少技术专长的人员和复杂性和成本较低的测试设备来实现。
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公开(公告)号：US08841007B2
公开(公告)日：2014-09-23
申请号：US13458808
申请日：2012-04-27
Applicant: Kai-Chieh Chang , Yinfong Ding , Ganping Ju , Timothy Klemmer , Yukiko Kubota , Thomas P. Nolan , Yingguo Peng , Jan-Ulrich Thiele , Qihong Wu , Xiaobin Zhu
Inventor： Kai-Chieh Chang , Yinfong Ding , Ganping Ju , Timothy Klemmer , Yukiko Kubota , Thomas P. Nolan , Yingguo Peng , Jan-Ulrich Thiele , Qihong Wu , Xiaobin Zhu
CPC classification number: G11B5/667 , G11B5/1278 , G11B5/7325
Abstract: Various magnetic stack embodiments may be constructed with a soft magnetic underlayer (SUL) having a first thickness disposed between a substrate and a magnetic recording layer. A heatsink may have a second thickness and be disposed between the SUL and the magnetic recording layer. The first and second thicknesses may each be tuned to provide predetermined thermal conductivity and magnetic permeability throughout the data media.
Abstract translation: 可以使用具有设置在基板和磁记录层之间的第一厚度的软磁性底层（SUL）来构造各种磁性堆叠实施例。 散热器可以具有第二厚度并且设置在SUL和磁记录层之间。 第一和第二厚度可以各自被调整以在整个数据介质中提供预定的热导率和磁导率。
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公开(公告)号：US20130288079A1
公开(公告)日：2013-10-31
申请号：US13458808
申请日：2012-04-27
Applicant: Kai-Chieh Chang , Yinfeng Ding , Ganping Ju , Timothy Klemmer , Yukiko Kubota , Thomas P. Nolan , Yingguo Peng , Jan-Ulrich Thiele , Qihong Wu , Xiaobin Zhu
Inventor： Kai-Chieh Chang , Yinfeng Ding , Ganping Ju , Timothy Klemmer , Yukiko Kubota , Thomas P. Nolan , Yingguo Peng , Jan-Ulrich Thiele , Qihong Wu , Xiaobin Zhu
IPC: G11B5/738
CPC classification number: G11B5/667 , G11B5/1278 , G11B5/7325
Abstract: Various magnetic slack embodiments may be constructed with a soft magnetic underlayer (SUL) having a first thickness disposed between a substrate and a magnetic recording layer. A heatsink may have a second thickness and be disposed between the SUL and the magnetic recording layer. The first and second thicknesses may each be tuned to provide predetermined thermal conductivity and magnetic permeability throughout the data media.
Abstract translation: 各种磁性松弛实施例可以由具有设置在基板和磁记录层之间的第一厚度的软磁性底层（SUL）构成。 散热器可以具有第二厚度并且设置在SUL和磁记录层之间。 第一和第二厚度可以各自被调整以在整个数据介质中提供预定的热导率和磁导率。
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Patent Agency Ranking
6.发明授权公开(公告)号：US07175925B2
公开(公告)日：2007-02-13
申请号：US10663670
申请日：2003-09-17
Applicant: Qixu David Chen , Thomas P. Nolan , Zhong Stella Wu , Samuel Dacke Harkness, IV , Rajiv Yadav Ranjan
Inventor： Qixu David Chen , Thomas P. Nolan , Zhong Stella Wu , Samuel Dacke Harkness, IV , Rajiv Yadav Ranjan
CPC classification number: G11B5/732 , G11B5/667 , G11B2005/0029
Abstract: A perpendicular magnetic recording medium, comprising: (a) a non-magnetic substrate having a surface; and (b) a layer stack formed over the substrate surface, comprising in overlying sequence from the substrate surface: (i) a magnetically soft underlayer; (ii) an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material formed thereon; and (iii) at least one crystallographically oriented magnetically hard perpendicular recording layer; wherein the magnetically soft underlayer is sputter-deposited at a sufficiently large target-to-substrate spacing and at a sufficiently low gas pressure selected to provide the underlayer with a smooth surface having a low average surface roughness Ra below about 0.3 nm, as measured by Atomic Force Microscopy (AFM).
Abstract translation: 一种垂直磁记录介质，包括：（a）具有表面的非磁性基板; 和（b）形成在所述衬底表面上的层叠层，包括从所述衬底表面的重叠顺序：（i）磁软底层; （ii）用于晶体取向形成在其上的垂直磁记录材料层的层间结构; 和（iii）至少一个晶体取向的磁性硬垂直记录层; 其中所述磁软底层被溅射沉积在足够大的靶对衬底间隔处并且以足够低的气体压力被选择以使底层具有平均表面，其具有低于约0.3nm的低平均表面粗糙度Ra，如通过 原子力显微镜（AFM）。
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公开(公告)号：US20120219827A1
公开(公告)日：2012-08-30
申请号：US13037288
申请日：2011-02-28
Applicant: Jai-Young Kim , Thomas P. Nolan , Kyongha Kang , Shoutao Wang , Vincent D. Nguyen , Abebe Hailu , Charles C. Chen
Inventor： Jai-Young Kim , Thomas P. Nolan , Kyongha Kang , Shoutao Wang , Vincent D. Nguyen , Abebe Hailu , Charles C. Chen
CPC classification number: G11B5/82 , G11B5/66 , G11B5/7325 , G11B5/851
Abstract: A stack including a crystallographic orientation interlayer, a magnetic zero layer disposed on the interlayer, and a magnetic recording layer disposed on the magnetic zero layer is disclosed. The magnetic zero layer is non-magnetic or has a saturation magnetic flux density (Bs) less than about 100 emu/cc. The magnetic zero layer and the magnetic layer include grains surrounded by a non-magnetic segregant. The magnetic zero layer provides a coherent interface between the interlayer and the magnetic layer with a lattice mismatch less than about 4%.
Abstract translation: 公开了一种包括晶体取向中间层，设置在中间层上的磁性零层和设置在磁性零层上的磁记录层的堆叠。 磁性零层是非磁性的或具有小于约100emu / cc的饱和磁通密度（Bs）。 磁性零层和磁性层包括由非磁性分离器包围的晶粒。 磁性零层在中间层和磁性层之间提供具有小于约4％的晶格失配的相干界面。
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8.发明申请Thin sul perpendicular magnetic recording media and recording systems comprising same 审中-公开薄型垂直磁记录介质和包括其的记录系统公开(公告)号：US20070287031A1
公开(公告)日：2007-12-13
申请号：US11448770
申请日：2006-06-08
Applicant: Thomas P. Nolan , Li Tang , Yong-Chang Feng , Zhong (Stella) Wu , Samuel D. Harkness , Hans J. Richter , Youfeng Zheng
Inventor： Thomas P. Nolan , Li Tang , Yong-Chang Feng , Zhong (Stella) Wu , Samuel D. Harkness , Hans J. Richter , Youfeng Zheng
CPC classification number: G11B5/667 , G11B5/1278
Abstract: A perpendicular magnetic recording system, comprises: a perpendicular magnetic recording medium including a non-magnetic substrate having a surface and a stacked plurality of thin film layers forming a layer stack overlying the substrate surface and including a magnetically soft underlayer (SUL) beneath at least one perpendicular magnetic recording layer, wherein the SUL has a saturation magnetization (Ms)—thickness (t) product (Mst) less than about 4 memu/cm2, and a ring-type magnetic transducer head is positioned in spaced adjacency to an upper surface of the layer stack.
Abstract translation: 一种垂直磁记录系统，包括：垂直磁记录介质，包括具有表面的非磁性基板和层叠的多个薄膜层，所述薄膜层形成层叠堆叠在所述基板表面上并且至少包括至少在下面的磁软底层（SUL） 一个垂直磁记录层，其中SUL具有小于约4 memu / cm 2的饱和磁化强度（M S）S - 厚度（t）积（M S） SUP> 2 <！ - SIPO
- >和环型磁性换能器头位于与层堆叠的上表面间隔开的位置。 -
公开(公告)号：US09972352B2
公开(公告)日：2018-05-15
申请号：US12544091
申请日：2009-08-19
Applicant: Thomas P. Nolan , Bogdan F. Valcu , Li Tang
Inventor： Thomas P. Nolan , Bogdan F. Valcu , Li Tang
Abstract: Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of easier writability on the recorded track and difficult erasure off-track (between tracks and on neighboring tracks) is achieved, in part, by an unbalanced antiferromagnetically coupled (AFC) SUL structure. A permeability gradient is established within the soft underlayer with layers having different values of permeability and magnetic thickness (Bs*t). In an aspect, a first SUL layer includes a high permeability region and an overlying low permeability region. A second layer antiferromagnetically couples the first layer to a low permeability third SUL layer. The present invention may be utilized with high density perpendicular recording media requiring carefully balanced magnetic properties.
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公开(公告)号：US20110043939A1
公开(公告)日：2011-02-24
申请号：US12544091
申请日：2009-08-19
Applicant: Thomas P. Nolan , Bogdan F. Valcu , Li Tang
Inventor： Thomas P. Nolan , Bogdan F. Valcu , Li Tang
Abstract: Methods and media structures are provided for increasing writability and reducing unintentional erasure of perpendicular magnetic recording media. Variable permeability is controlled within a thin soft underlayer (SUL) structure, independent of bulk SUL material properties such as magnetic moment (Bs) and magnetic anisotropy (Hk). Media with an improved combination of easier writability on the recorded track and difficult erasure off-track (between tracks and on neighboring tracks) is achieved, in part, by an unbalanced antiferromagnetically coupled (AFC) SUL structure. A permeability gradient is established within the soft underlayer with layers having different values of permeability and magnetic thickness (Bs*t). In an aspect, a first SUL layer includes a high permeability region and an overlying low permeability region. A second layer antiferromagnetically couples the first layer to a low permeability third SUL layer. The present invention may be utilized with high density perpendicular recording media requiring carefully balanced magnetic properties.
Abstract translation: 提供了方法和介质结构，以提高可写性并减少垂直磁记录介质的无意擦除。 可变磁导率控制在薄的软底层（SUL）结构内，与体积SUL材料性质如磁矩（Bs）和磁各向异性（Hk）无关。 通过不平衡的反铁磁耦合（AFC）SUL结构实现了具有改善的在记录轨道上易于写入的组合和难以擦除离轨（在轨道和相邻轨道之间）的介质。 在软底层内形成渗透率梯度，其层具有不同的磁导率和磁厚度值（Bs * t）。 一方面，第一SUL层包括高磁导率区域和上覆的低磁导率区域。 第二层将第一层反铁磁耦合到低渗透性第三SUL层。 本发明可以用于需要仔细平衡的磁性能的高密度垂直记录介质。
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