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21.发明授权In-situ post-deposition oxidation treatment for improved magnetic recording media 失效用于改进磁记录介质的原位后沉积氧化处理公开(公告)号：US07081268B2
公开(公告)日：2006-07-25
申请号：US10663698
申请日：2003-09-17
IPC分类号： B05D5/12
CPC分类号： G11B5/65 , G11B5/012 , G11B5/656 , G11B5/72 , G11B5/74 , G11B5/82 , G11B5/84 , G11B5/8408 , G11B5/851 , G11B2005/0029
摘要： A method of manufacturing a magnetic recording medium comprises sequential steps of: (a) providing an apparatus for manufacturing the medium; (b) supplying the apparatus with a substrate for the medium; (c) forming a magnetic recording layer on the substrate in a first portion of the apparatus; (d) treating the magnetic recording layer with oxygen gas in a second portion of the apparatus at a sub-atmospheric pressure and for an interval sufficient to provide the resultant medium with at least one of the following, relative to a similar medium manufactured by a similar method but wherein the oxygen treatment of step (d) is not performed: (i) a more negative nucleation field (Hn); (ii) increased remanent squareness (Sr); (iii) increased signal-to-medium noise ratio (SMNR); (iv) narrower switching field distribution (SFD); and (v) decreased thermal decay rate; and (e) forming a protective overcoat layer on the oxygen-treated magnetic recording layer in a third portion of the apparatus.
摘要翻译： 制造磁记录介质的方法包括以下步骤：（a）提供用于制造介质的装置; （b）向该设备供应介质用基板; （c）在所述装置的第一部分中在所述基板上形成磁记录层; （d）在亚大气压下在装置的第二部分中用氧气处理磁记录层，并且间隔足以使所得介质具有以下至少一种：相对于由 类似的方法，但是其中不执行步骤（d）的氧处理：（i）更负的成核场（H n n N）; （ii）增加的剩余平方度（S SUB）; （iii）增加的信噪比（SMNR）; （iv）较窄的开关场分布（SFD）; 和（v）降低热衰减率; 和（e）在设备的第三部分中在经氧处理的磁记录层上形成保护性外涂层。
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公开(公告)号：US06914749B2
公开(公告)日：2005-07-05
申请号：US09873263
申请日：2001-06-05
申请人： Chung-Hee Chang , Rajiv Y. Ranjan
发明人： Chung-Hee Chang , Rajiv Y. Ranjan
摘要： A perpendicular magnetic recording medium having a substrate and a magnetic underlayer on the substrate, the magnetic underlayer having an easy axis of magnetization substantially directed in a radial or transverse direction, and a process for manufacturing the perpendicular magnetic recording medium are disclosed.
摘要翻译： 公开了一种在基板上具有基板和磁性底层的垂直磁记录介质，磁性底层具有基本上沿径向或横向方向的易磁化磁化轴，以及用于制造垂直磁记录介质的工艺。
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公开(公告)号：US06777066B1
公开(公告)日：2004-08-17
申请号：US09986063
申请日：2001-11-07
IPC分类号： G11B5667
摘要： A low noise, high areal recording density, perpendicular magnetic recording medium comprises: (a) a non-magnetic substrate having a surface; and (b) a layer stack formed over the substrate surface, the layer stack comprising, in overlying sequence from the substrate surface: (i) a magnetically soft underlayer; (ii) at least one non-magnetic interlayer; and (iii) a CoCr-based, magnetically hard perpendicular recording layer; wherein the compositions of the at least one non-magnetic interlayer and the CoCr-based, magnetically hard perpendicular recording layer are selected to provide the medium with a negative nucleation field Hn, remanent squareness of about 1, and high coercivity of at least about 5,000 Oe. A method for manufacturing the medium by means of DC magnetron sputtering of layers (i)-(iii) is also disclosed.
摘要翻译： 低噪声，高面积记录密度，垂直磁记录介质包括：（a）具有表面的非磁性基底; 以及（b）形成在所述衬底表面上的层叠层，所述层堆叠以从衬底表面的顺序包括：（i）软磁性底层;（ii）至少一个非磁性中间层; 和（iii）基于CoCr的磁性硬的垂直记录层;其中选择所述至少一个非磁性中间层和所述CoCr基磁性硬垂直记录层的组成以向所述介质提供负成核场Hn ，约1的残余矩形度和至少约5,000Oe的高矫顽力。还公开了通过层（i） - （iii）的DC磁控溅射制造介质的方法。
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公开(公告)号：US06709773B1
公开(公告)日：2004-03-23
申请号：US09873314
申请日：2001-06-05
申请人： Chung-Hee Chang , Rajiv Y. Ranjan
发明人： Chung-Hee Chang , Rajiv Y. Ranjan
IPC分类号： G11B566
CPC分类号： G11B5/732 , C23C14/025 , C23C14/165 , G11B5/667 , G11B5/851 , G11B5/852 , Y10S428/90 , Y10T428/265
摘要： A perpendicular magnetic recording medium having a substrate, a seedlayer on the substrate and a magnetic underlayer on the seedlayer, the magnetic underlayer having an easy axis of magnetization substantially directed in a radial or transverse direction, and a process for manufacturing the perpendicular magnetic recording medium are disclosed.
摘要翻译： 具有衬底，衬底上的籽晶层和种子层上的磁性底层的垂直磁记录介质，所述磁性底层具有基本上沿径向或横向方向的易磁化磁化轴，以及用于制造垂直磁记录介质的方法 被披露。
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