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    Thin film magnetic recording disk with ruthenium-aluminum layer
    1.
    发明授权
    Thin film magnetic recording disk with ruthenium-aluminum layer 失效
    带钌铝层的薄膜磁记录盘

    公开(公告)号：US06846543B2

    公开(公告)日：2005-01-25

    申请号：US10850735

    申请日：2004-05-21

    申请人： Xiaoping Bian ,  Mary Frances Doerner ,  Jinshan Li ,  Mohammad Taghi Mirzamaani ,  Kai Tang

    发明人： Xiaoping Bian ,  Mary Frances Doerner ,  Jinshan Li ,  Mohammad Taghi Mirzamaani ,  Kai Tang

    IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  G11B5/66 ,  B05D5/12 ,  B32B3/02 ,  B32B15/00 ,  G11B5/70

    CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/265

    摘要： A magnetic thin film disk for use in a disk drive with a ruthenium-aluminum (RuAl) seed layer with B2 structure followed by a NiAl layer is described. The disk has reduced noise and increased squareness which results in improved recording performance in a disk drive utilizing the disk. The improved disk is formed by first depositing the RuAl seed layer on the substrate then the NiAl layer is deposited onto the NiAl, followed by the other layers required for a magnetic disk such as an underlayer material with a lattice parameter compatible with RuAl such as Cr-alloy, followed by a standard hcp magnetic material. The RuAl seed layer promotes a [100] preferred orientation in the underlayer which in turn promotes a [11{overscore (2)}0] preferred orientation in the magnetic layer.

    摘要翻译： 描述了一种用于带有B2结构的钌 - 铝（RuAl）晶种层的磁盘驱动器的磁性薄膜盘片，然后是NiAl层。 磁盘具有降低的噪声和增加的矩形度，这导致利用磁盘的磁盘驱动器中的记录性能得到改善。 通过首先在衬底上沉积RuAl籽晶层，然后将NiAl层沉积到NiAl上，然后沉积到具有与RuAl相容的晶格参数如Cr的磁盘所需的其它层，形成改进的盘 合金，其次是标准的hcp磁性材料。 RuAl种子层促进底层中的优选取向，这进一步促进了磁性层中的[11（超（20））优选取向。

    Magnetic thin film media with a pre-seed layer of CrTi
    3.
    发明授权
    Magnetic thin film media with a pre-seed layer of CrTi 失效
    具有CrTi预种子层的磁性薄膜介质

    公开(公告)号：US06852430B2

    公开(公告)日：2005-02-08

    申请号：US10059780

    申请日：2002-01-29

    申请人： Xiaoping Bian ,  Mary Frances Doerner ,  James A. Hagan ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Adam Daniel Polcyn ,  Kai Tang

    发明人： Xiaoping Bian ,  Mary Frances Doerner ,  James A. Hagan ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Adam Daniel Polcyn ,  Kai Tang

    IPC分类号： G11B5/73 ,  H01F10/30 ,  H01F10/32 ,  G11B5/66 ,  G11B5/70

    CPC分类号： B82Y25/00 ,  G11B5/732 ,  H01F10/30 ,  H01F10/32 ,  Y10S428/90 ,  Y10T428/12472 ,  Y10T428/12681 ,  Y10T428/265

    摘要： A thin film magnetic media structure with a pre-seed layer of CrTi is disclosed. The CrTi pre-seed layer presents an amorphous or nanocrystalline structure. The preferred seed layer is RuAl for use with the CrTi pre-seed layer. The use of the CrTi/RuAl bilayer structure provides superior adhesion to the substrate and resistance to scratching, as well as, excellent coercivity and signal-to-noise ratio (SNR) and reduced cost over the prior art. One embodiment of the invention sputter-deposits a CrTi pre-seed layer and a RuAl seed layer followed by at least one underlayer and at least one magnetic layer on a circumferentially polished substrate structure to achieve an Mrt orientation ratio greater than one. Two methods according to the invention allow the Mrt orientation ratio of the disk to be adjusted or maximized by varying the thickness of the RuAl seed layer and/or altering the atomic percentage of titanium in the pre-seed layer.

    摘要翻译： 公开了一种具有CrTi预种子层的薄膜磁介质结构。 CrTi预种子层呈现无定形或纳米晶体结构。 优选的种子层是用于CrTi预种子层的RuAl。 CrTi / RuAl双层结构的使用提供了优异的与基板的粘附性和耐划伤性，以及优于现有技术的矫顽力和信噪比（SNR）以及降低的成本。 本发明的一个实施方案溅射沉积CrTi预种子层和RuAl种子层，随后是周向抛光的衬底结构上的至少一个底层和至少一个磁性层，以实现大于1的Mrt取向比。 根据本发明的两种方法允许通过改变RuAl种子层的厚度和/或改变预种子层中钛的原子百分比来调节或最大化盘的Mrt取向比。

    Thin film magnetic recording disk with a chromium-nickel pre-seed layer
    4.
    发明授权
    Thin film magnetic recording disk with a chromium-nickel pre-seed layer 失效
    具有铬镍预种子层的薄膜磁记录盘

    公开(公告)号：US06572989B2

    公开(公告)日：2003-06-03

    申请号：US09876571

    申请日：2001-06-06

    申请人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

    发明人： Xiaoping Bian ,  Mary Frances Doerner ,  Tim Minvielle ,  Mohammad Taghi Mirzamaani ,  Kai Tang

    IPC分类号： G11B566

    CPC分类号： G11B5/732 ,  G11B5/66 ,  G11B5/7325 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/12944 ,  Y10T428/24975 ,  Y10T428/265

    摘要： In a thin film magnetic disk, a crystalline CrNi pre-seed layer is sputtered onto a substrate such as glass, followed by a RuAl seed layer. The CrNi pre-seed layer reduces grain size and its distribution, and improves in-plane crystallographic orientation, coercivity (Hc) and SNR. In a preferred embodiment the RuAl seed layer is followed by a Cr alloy underlayer. In a preferred embodiment the Cr alloy underlayer is followed by an onset layer and a magnetic layer, or by two or more magnetic layers antiferromagnetically coupled through one or more spacer layers. The crystalline CrNi pre-seed layer allows use of a thinner RuAl seed layer which results in smaller overall grain size, as well as a reduction in manufacturing cost due to relatively high cost of ruthenium. The CrNi pre-seed layer also allows use of a thinner Cr alloy underlayer which also contributes to reduce overall grain size.

    摘要翻译： 在薄膜磁盘中，将结晶CrNi预种子层溅射到诸如玻璃的衬底上，随后是RuAl种子层。 CrNi预种子层减小晶粒尺寸及其分布，并提高晶面取向，矫顽力（Hc）和信噪比。 在优选的实施方案中，RuAl种子层之后是Cr合金底层。 在优选的实施方案中，Cr合金底层之后是起始层和磁性层，或者由两个或更多个通过一个或多个间隔层反铁磁耦合的磁性层。 结晶CrNi预种子层允许使用更薄的RuAl种子层，其导致更小的总体晶粒尺寸，以及由于钌的相对高的成本而导致的制造成本的降低。 CrNi预种子层还允许使用更薄的Cr合金底层，这也有助于减小总体晶粒尺寸。