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1.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
申请人： Qixu David Chen , Thomas P. Nolan , Zhong Stella Wu , Samuel Dacke Harkness, IV , Rajiv Yadav Ranjan
发明人： Qixu David Chen , Thomas P. Nolan , Zhong Stella Wu , Samuel Dacke Harkness, IV , Rajiv Yadav Ranjan
CPC分类号： G11B5/732 , G11B5/667 , G11B2005/0029
摘要： 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).
摘要翻译： 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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2.发明授权公开(公告)号：US06207269B1
公开(公告)日：2001-03-27
申请号：US09188331
申请日：1998-11-09
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/8404 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： High substrate biasing during sputter deposition of an underlayer enables the manufacture of a magnetic recording medium exhibiting increased Hr, S* and SNR. Embodiments include sputter depositing a CrMn underlayer on a NiP-plated Al substrate at a negative substrate bias greater than about 300 volts and subsequently depositing a CoCrPtTa magnetic layer.
摘要翻译： 溅射沉积底层期间的高衬底偏置使得能够制造表现出增加的Hr，S *和SNR的磁记录介质。 实施例包括在NiP镀Al衬底上以大于约300伏的负衬底偏压溅射沉积CrMn底层，随后沉积CoCrPtTa磁性层。
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3.发明授权公开(公告)号：US07531248B1
公开(公告)日：2009-05-12
申请号：US11017657
申请日：2004-12-22
IPC分类号： G11B5/667
摘要： A perpendicular magnetic recording medium having a substrate, an amorphous soft underlayer of thickness 30 nm or greater, and a granular magnetic recording layer for perpendicular recording is disclosed. The granular magnetic recording layer includes a non-magnetic region between magnetic grains, wherein the non-magnetic region includes metal nitride or metal carbide and provides exchange decoupling between the magnetic grains. The perpendicular recording medium of this invention reduces DC noise and increases media signal-to-noise ratio; it reduces surface roughness, which in turn reduces the head-to-media spacing and the head-to-amorphous soft underlayer spacing.
摘要翻译： 公开了具有基板，厚度为30nm以上的无定形软底层和用于垂直记录的粒状磁记录层的垂直磁记录介质。 颗粒状磁记录层包括磁性颗粒之间的非磁性区域，其中非磁性区域包括金属氮化物或金属碳化物，并提供磁性颗粒之间的交换去耦合。 本发明的垂直记录介质降低了DC噪声并提高了介质信噪比; 它降低了表面粗糙度，这反过来降低了头对媒体间距和头对非软的软下层间距。
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公开(公告)号：US06846576B1
公开(公告)日：2005-01-25
申请号：US10207087
申请日：2002-07-30
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/66 , Y10T428/12465 , Y10T428/12646 , Y10T428/12861 , Y10T428/12868 , Y10T428/12875 , Y10T428/12931 , Y10T428/12986 , Y10T428/24942 , Y10T428/265 , Y10T428/31
摘要： Laminated magnetic recording medium with two Co-containing layers separated by a non-magnetic Ru-containing interlayer is stabilized by Ru-containing layer between the recording layers and Co-containing stabilization layers through anti-ferromagnetic coupling. The insertion of Co layer beneath Ru spacer has resulted in increased coupling, and further coupling enhancement is achieved by low pressure process of Co and Ru layers.
摘要翻译： 通过非磁性含Ru中间层分离的具有两个含Co层的层叠磁记录介质通过反铁磁耦合在记录层和含Co稳定层之间的含Ru层保持稳定。 Co层下面的Co层的插入导致耦合增加，并且通过Co和Ru层的低压工艺实现进一步的耦合增强。
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公开(公告)号：US06238809B1
公开(公告)日：2001-05-29
申请号：US09160579
申请日：1998-09-25
申请人： Zhong Stella Wu , Rajiv Y. Ranjan
发明人： Zhong Stella Wu , Rajiv Y. Ranjan
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/265
摘要： The Hr and SNR of a magnetic recording medium are increased and reduced recording signal modulation by employing an underlayer containing Cr or a Cr alloy with Ta2O5 dispersed therein. Embodiments include a composite underlayer comprising a first Cr or Cr alloy underlayer containing about 0.1 to about 10 at. % dispersed Ta2O5 and a second underlayer comprising Cr or a Cr alloy, e.g. CrV, thereon.
摘要翻译： 磁记录介质的Hr和SNR通过使用含有分散有Ta 2 O 5的Cr或Cr合金的底层来增加记录信号调制并降低记录信号调制。 实施方案包括复合底层，其包含含有约0.1至约10原子的第一Cr或Cr合金底层。 ％分散的Ta 2 O 5和包含Cr或Cr合金的第二底层，例如。 CrV，其上。
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公开(公告)号：US20100021772A1
公开(公告)日：2010-01-28
申请号：US12178540
申请日：2008-07-23
CPC分类号： G11B5/72 , G11B5/8408
摘要： The invention relates to granular perpendicular magnetic recording media with a capping layer comprised of a material having high surface mobility and low surface energy. The capping layer surface is oxidized to produce a passivating surface that is impervious to corrosion.
摘要翻译： 本发明涉及具有由具有高表面迁移率和低表面能的材料构成的覆盖层的颗粒状垂直磁记录介质。 覆盖层表面被氧化以产生不易腐蚀的钝化表面。
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公开(公告)号：US06787251B1
公开(公告)日：2004-09-07
申请号：US10211331
申请日：2002-08-05
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/8404 , Y10S428/90 , Y10T428/265
摘要： A bi-crystal magnetic recording medium, i.e., medium with Cr(200) and Co(11.0) orientations, having a CrW-containing underlayer in which the W content increases for improved lattice matching with a Co-alloy magnetic layer has high coercivity, high SMNR and high areal recording density.
摘要翻译： 双相磁记录介质，即具有Cr（200）和Co（11.0）取向的介质，其具有含CrW的底层，其中W含量增加以改善与Co合金磁性层的晶格匹配，具有高的矫顽力， 高SMNR和高面积记录密度。
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公开(公告)号：US08043734B2
公开(公告)日：2011-10-25
申请号：US12178540
申请日：2008-07-23
IPC分类号： G11B5/66
CPC分类号： G11B5/72 , G11B5/8408
摘要： The invention relates to granular perpendicular magnetic recording media with a capping layer comprised of a material having high surface mobility and low surface energy. The capping layer surface is oxidized to produce a passivating surface that is impervious to corrosion.
摘要翻译： 本发明涉及具有由具有高表面迁移率和低表面能的材料构成的覆盖层的颗粒状垂直磁记录介质。 覆盖层表面被氧化以产生不易腐蚀的钝化表面。
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9.发明申请公开(公告)号：US20100020441A1
公开(公告)日：2010-01-28
申请号：US12180093
申请日：2008-07-25
申请人： Zhong Stella Wu , Samuel Dacke Harkness , Mariana R. Munteanu , Qixu Chen , Connie Chunling Liu
发明人： Zhong Stella Wu , Samuel Dacke Harkness , Mariana R. Munteanu , Qixu Chen , Connie Chunling Liu
摘要： A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO2) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.
摘要翻译： 公开了具有双层磁性膜的垂直磁记录介质。 底层完全交换去耦，顶层包含一定量的交换耦合，用于记录性能优化。 优选地，底部磁性层包含稳定的氧化物材料（例如TiO 2）和其它非磁性元件（例如，Cr）。 还公开了制造介质的方法。
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公开(公告)号：US07026010B1
公开(公告)日：2006-04-11
申请号：US10808448
申请日：2004-03-25
IPC分类号： B05D5/12
CPC分类号： G11B5/7325 , G11B5/656 , G11B5/66 , Y10T428/12465 , Y10T428/12646 , Y10T428/12861 , Y10T428/12868 , Y10T428/12875 , Y10T428/12931 , Y10T428/12986 , Y10T428/24942 , Y10T428/265 , Y10T428/31
摘要： Laminated magnetic recording medium with two Co-containing layers separated by a non-magnetic Ru-containing interlayer is stabilized by Ru-containing layer between the recording layers and Co-containing stabilization layers through anti-ferromagnetic coupling. The insertion of Co layer beneath Ru spacer has resulted in increased coupling, and further coupling enhancement is achieved by low pressure process of Co and Ru layers.
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