公开(公告)号：US20050214586A1

公开(公告)日：2005-09-29

申请号：US10808020

申请日：2004-03-23

申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/72

CPC分类号： G11B5/66 ,  G11B5/656

摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has an upper ferromagnetic layer (UL), and a lower ferromagnetic layer structure formed of two ferromagnetically-coupled lower layers (LL1, LL2). The UL is antiferromagnetically-coupled to the lower layer structure across an antiferromagnetically-coupling layer. LL1 and LL2 are ferromagnetically coupled across a ferromagnetic coupling layer so the magnetizations of LL1 and LL2 remain parallel in each remanent magnetic state, but are antiparallel to the magnetization of the UL in each remanent magnetic state. The UL has an Mrt greater than the sum of the Mrt values of LL1 and LL2.

摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有上铁磁层（UL）和由两个铁磁耦合的下层（LL 1，LL 2）形成的低铁磁层结构。 UL通过反铁磁耦合层与下层结构反铁磁耦合。 LL 1和LL 2横跨铁磁耦合层铁磁耦合，因此LL 1和LL 2的磁化在每个剩余磁性状态下保持平行，但在每个剩余磁状态下与UL的磁化反平行。 UL具有大于LL1和LL2的Mrt值之和的Mrt。

公开(公告)号：US20050190498A1

公开(公告)日：2005-09-01

申请号：US10788687

申请日：2004-02-26

申请人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

发明人： Hoa Do ,  Eric Fullerton ,  David Margulies ,  Andreas Moser

IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/738 ,  G11B5/82 ,  H01F10/16

CPC分类号： G11B5/66 ,  G11B5/656

摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has three lower ferromagnetic layers (LL1, LL2, LL3) and an upper ferromagnetic layer (UL), all four ferromagnetic layers being antiferromagnetically-coupled together across corresponding antiferromagnetically-coupling layers. The UL has a magnetization-remanence-thickness product (Mrt) greater than the Mrt each of the three lower layers LL1, LL2, LL3, and greater than the sum of the Mrt values of LL1 and LL3. The middle lower layer LL2 has an Mrt less than the Mrt of each of the other lower layers LL1 and LL3, and as a result the composite Mrt of the AFC structure is less than the composite Mrt of a conventional AFC structure having only a single lower layer. The AFC structure achieves this composite Mrt reduction without increasing the Mrt of any of the three lower layers above the maximum Mrt of the single lower layer in the conventional AFC structure.

摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有三个低铁磁层（LL1，LL2，LL3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁耦合层上反铁磁耦合在一起 。 UL具有大于三个下层LL1，LL2，LL3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL1和LL3的Mrt值的和。 中下层LL2的Mrt小于其他下层LL1和LL3中的每一层的Mrt，结果，AFC结构的复合材料Mrt小于仅具有单一下层LL1和LL3的常规AFC结构的复合材料Mrt 层。 AFC结构在不增加传统AFC结构中单个下层的最大Mrt以上的三个下层中的任何一个的Mrt的情况下实现了该复合Mrt的还原。

公开(公告)号：US20060166039A1

公开(公告)日：2006-07-27

申请号：US11044283

申请日：2005-01-26

申请人： Andreas Berger ,  Hoa Do

发明人： Andreas Berger ,  Hoa Do

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66

摘要： A perpendicular magnetic recording medium, such as a perpendicular magnetic recording disk, has a magnetic “torque” layer (MTL) that exerts a magnetic torque onto the perpendicular magnetic recording layer (RL) in the presence of the applied perpendicular write field. The MTL thus acts as a write assist layer in reversing the magnetization of the RL. A coupling layer (CL) is located between the MTL and the RL and provides the appropriate ferromagnetic coupling strength between the MTL and the RL.

公开(公告)号：US20070037016A1

公开(公告)日：2007-02-15

申请号：US11203360

申请日：2005-08-12

申请人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

发明人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325

摘要： A perpendicular magnetic recording disk has a granular Co-based ferromagnetic alloy recording layer (RL) with oxides of a selected metal (Ta or Nb) and a reduced-thickness exchange-break layer (EBL) between the RL and the soft magnetic underlayer (SUL). A perpendicular magnetic recording system that includes the disk, the write head and the read head, has an improved ability to write to the RL because of the reduced-thickness EBL.

摘要翻译： 垂直磁记录盘具有在RL和软磁性底层之间具有所选金属（Ta或Nb）和减薄厚度交换破坏层（EBL）的氧化物的粒状Co基铁磁合金记录层（RL） SUL）。 由于厚度较薄的EBL，包括盘，写头和读头的垂直磁记录系统具有提高写入RL能力。

公开(公告)号：US06803119B2

公开(公告)日：2004-10-12

申请号：US09952822

申请日：2001-09-13

申请人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

发明人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

IPC分类号： G11B582

CPC分类号： G11B5/7315 ,  G11B5/012 ,  Y10T428/12944 ,  Y10T428/24355 ,  Y10T428/265

摘要： This invention provides a disk which has an in-plane oriented magnetic recording layer on a glass, ceramic, or other nonmetal substrate and a method for making the disc. A thin layer of texturable NiP is sputtered on the substrate. This NiP layer is textured before the magnetic layer is deposited. The disk combines all the advantages of a glass or ceramic substrate along with the advantages of an oriented magnetic medium.

摘要翻译： 本发明提供一种在玻璃，陶瓷或其它非金属基板上具有面内定向磁记录层的盘，以及制造该盘的方法。 在衬底上溅射薄层可纹理的NiP。 在沉积磁性层之前，该NiP层被纹理化。 该盘结合玻璃或陶瓷基板的所有优点以及定向磁性介质的优点。

公开(公告)号：US07862913B2

公开(公告)日：2011-01-04

申请号：US11584992

申请日：2006-10-23

申请人： Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Frances Minardi ,  Natacha Frederique Supper ,  Kentaro Takano ,  Min Xiao ,  Qi-Fan Xiao

发明人： Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Frances Minardi ,  Natacha Frederique Supper ,  Kentaro Takano ,  Min Xiao ,  Qi-Fan Xiao

IPC分类号： G11B5/66 ,  G11B5/706

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66 ,  G11B5/7325

摘要： An improved structure for the construction of perpendicular recording media is disclosed. The structure includes a perpendicular recording layer with at least two oxide sublayers or a lower sublayer of a non-oxide. One structure includes an upper sublayer comprised of a Silicon-oxide, while a lower sublayer is comprised of a Tantalum-oxide. The structures provide for increased coercivity and corrosion resistance.

摘要翻译： 公开了用于构建垂直记录介质的改进的结构。 该结构包括具有至少两个氧化物层的垂直记录层或非氧化物的下层。 一个结构包括由氧化硅构成的上层，而下层由钽氧化物构成。 该结构提供增强的矫顽力和耐腐蚀性。

公开(公告)号：US5567512A

公开(公告)日：1996-10-22

申请号：US134216

申请日：1993-10-08

申请人： Ga-Lane Chen ,  Hoa Do

发明人： Ga-Lane Chen ,  Hoa Do

IPC分类号： C23C14/06 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  G11B5/66 ,  B32B5/16 ,  B32B9/00 ,  C23C14/00

CPC分类号： G11B5/8408 ,  C23C14/0605 ,  G11B5/72 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265 ,  Y10T428/30

摘要： A thin film magnetic disc having a carbon overcoat which is characterized by (i) a surface density of nitrogen atoms between 3-8.times.10.sup.16 atoms/cm.sup.2, as determined by Rutherford backscatter spectroscopy, and (ii) an erosion rate, as measured by rate of erosion of the overcoat by an Al.sub.2 O.sub.3 particle tape placed in contact with the medium, that is several times less than that of a carbon overcoat having the same thickness, but formed by sputtering under a pure argon atmosphere. The overcoat has a preferred thickness between 80-150 .ANG.. Also disclosed is a method of producing a thin, wear-resistant carbon overcoat.

摘要翻译： 一种具有碳外涂层的薄膜磁盘，其特征在于：（i）由Rutherford反向散射光谱测定的氮原子的表面密度在3-8×10 16原子/ cm 2之间，和（ii）通过速率 通过与介质接触的Al 2 O 3颗粒带侵蚀外涂层，比具有相同厚度的碳外涂层小，但是在纯氩气氛下通过溅射形成。 外涂层的优选厚度在80-150安培之间。 还公开了一种生产薄的，耐磨的碳外涂层的方法。

公开(公告)号：US20060269799A1

公开(公告)日：2006-11-30

申请号：US11135750

申请日：2005-05-24

申请人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

发明人： Hoa Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

IPC分类号： G11B5/65

CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732

摘要： A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent. The amount of oxygen in the recording layer is substantially greater than the amount required for the stoichiometric oxide or oxides of the segregant or segregants, and a substantial portion of the oxygen present in the recording layer is present in the inter-granular material. The recording layer exhibits high signal-to-noise ratio (SNR), a coercivity Hc greater than about 5000 Oe and a nucleation field Hn greater (more negative) than about −1500 Oe.

摘要翻译： 垂直磁记录盘具有改进的基于CoPtCr的铁磁性合金的记录层，其具有由一种或多种Cr的一种或多种氧化物和一种或多种Si，Ta，Ti分离的一种或多种氧化物构成的颗粒间材料 ，B，Nb或Hf，其中存在于记录层中的氧的量大于约22原子％且小于约35原子％。 记录层中的氧气量基本上大于分离器或分离器的化学计量氧化物或氧化物所需的量，并且记录层中存在的大部分氧气存在于颗粒间材料中。 记录层表现出高的信噪比（SNR），大于约5000Oe的矫顽力H c和大于（更负）的成核场H N n 约-1500 Oe。

公开(公告)号：US06670032B2

公开(公告)日：2003-12-30

申请号：US09952788

申请日：2001-09-13

申请人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

发明人： David Thomas Margulies ,  Timothy Martin Reith ,  Hoa Do ,  Tim Minvielle ,  James A. Hagan

IPC分类号： G11B566

CPC分类号： G11B5/7315 ,  G11B5/012 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： This invention provides a disk which has an in-plane oriented magnetic recording layer on a glass, ceramic, or other nonmetallic substrate and a method for making the disk. A thin layer of material is deposited on the substrate to form a texture stop layer. A texturable layer is then deposited on the texture stop layer. This texturable layer is textured before the magnetic layer is deposited. The disk combines all the advantages of a glass or ceramic substrate along with the advantages of an oriented magnetic medium.

摘要翻译： 本发明提供一种在玻璃，陶瓷或其它非金属基底上具有面内定向磁记录层的盘，以及制造该盘的方法。 在衬底上沉积薄层材料以形成纹理停止层。 然后将纹理层叠加在纹理停止层上。 磁性层沉积之前纹理化。 该盘结合玻璃或陶瓷基板的所有优点以及定向磁性介质的优点。

公开(公告)号：US06537638B2

公开(公告)日：2003-03-25

申请号：US09681056

申请日：2000-12-13

申请人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

发明人： Hoa Do ,  Yoshihiro Ikeda ,  Yoshiaki Sonobe ,  Kentaro Takano

IPC分类号： G11B566

CPC分类号： G11B5/7325 ,  G11B5/65 ,  Y10S428/90

摘要： A perpendicular magnetic recording disk has an underlayer structure that causes the magnetic layer to have perpendicular magnetic anisotropy and high signal-to-noise ratio (SNR). The underlayer structure comprises a B2 type body-centered-cubic (BCC) material, such as the binary alloys NiAl, RuAl and RuTi, as an underlayer, and a Ti or TiCr alloy sublayer formed directly on the underlayer. The magnetic layer, such as a CoCrPt alloy, is deposited directly on the sublayer. The magnetic layer has perpendicular magnetic anisotropy due to the sublayer yet excellent SNR because of the smaller grain size of the sublayer material formed directly on the B2 type underlayer.

摘要翻译： 垂直磁记录盘具有底层结构，其使磁层具有垂直的磁各向异性和高的信噪比（SNR）。 底层结构包括B2型体心立方（BCC）材料，例如作为底层的二元合金NiAl，RuAl和RuTi，以及直接形成在底层上的Ti或TiCr合金子层。 磁性层，如CoCrPt合金，直接沉积在子层上。 由于子层材料直接在B2型底层上形成的较小的晶粒尺寸，所以磁层由于子层而具有良好的SNR，具有垂直的磁各向异性。