公开(公告)号：US06589676B1

公开(公告)日：2003-07-08

申请号：US09902600

申请日：2001-07-12

申请人： Jing Gui ,  Raj Thangaraj ,  Roger Alan Ristau ,  Samuel Dacke Harkness, IV ,  Gary Clark Rauch

发明人： Jing Gui ,  Raj Thangaraj ,  Roger Alan Ristau ,  Samuel Dacke Harkness, IV ,  Gary Clark Rauch

IPC分类号： G11B566

CPC分类号： C23C14/165 ,  G11B5/66 ,  G11B5/72 ,  G11B5/851 ,  G11B5/855 ,  Y10S428/90 ,  Y10T428/24975 ,  Y10T428/265

摘要： Corrosion resistant magnetic thin film media are fabricated using a CoCr magnetic layer having a stabilized protective chromium oxide film thereon. Stabilization of the protective chromium oxide film is achieved by incorporating a stabilizing element, such as Mo, V, Mn, Nb, Ni or Si, in the magnetic layer, thereby enabling elimination of the protective overcoat, e.g., C-containing protective overcoat, or forming the protective overcoat at a significantly low thickness of less than about 20 Å, e.g., up to about 1 Å. Embodiments include forming a magnetic layer comprising Co and Cr on an underlayer, and then forming a thin magnetic layer containing Co and Cr with the chromium oxide stabilizing element thereon. Embodiments further include introducing the chromium oxide stabilizing element by diffusion or ion implantation into a sputter deposited Co—Cr magnetic alloy layer.

摘要翻译： 使用其上具有稳定的保护性氧化铬膜的CoCr磁性层制造耐腐蚀磁性薄膜介质。 保护性氧化铬膜的稳定化是通过在磁性层中并入稳定元素如Mo，V，Mn，Nb，Ni或Si而实现的，由此能够消除保护性外涂层，例如含C的保护性外涂层， 或形成保护性外涂层，其厚度小于约20埃，例如至多约。 实施例包括在底层上形成包含Co和Cr的磁性层，然后在其上形成含有Co和Cr的薄的磁性层与氧化铬稳定元件。 实施例还包括通过扩散或离子注入将氧化铬稳定化元件引入溅射沉积的Co-Cr磁性合金层。

公开(公告)号：US06596341B1

公开(公告)日：2003-07-22

申请号：US09840919

申请日：2001-04-25

申请人： Jing Gui ,  Gary Clark Rauch

发明人： Jing Gui ,  Gary Clark Rauch

IPC分类号： B05D512

CPC分类号： G11B5/84 ,  G11B5/8408 ,  Y10T428/12639 ,  Y10T428/12826 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31

摘要： Magnetic recording media exhibiting high SNR and high thermal stability are produced by sputter depositing a magnetic alloy overlying a non-magnetic substrate, e.g., on an underlayer, heating to eliminate thermally unstable small grains thereby increasing the average grain size of the magnetic alloy layer but narrowing the grain size distribution, depositing a layer comprising a non-ferromagnetic element, and then heating to diffuse the non-ferromagnetic element into the grain boundaries of the heat treated magnetic alloy layer. Embodiments include sputter depositing a magnetic alloy layer comprising Co and Pt on an underlayer, heating at a temperature of about 150° C. to about 600° C. to increase the average grain size to about 8 to about 10 nm, depositing a layer comprising Cr, Mn or Ta, at a thickness up to about 25 Å, e.g., up to about 10 Å, on the magnetic alloy layer and heating to diffuse the Cr, Mn or Ta into the grain boundaries of the magnetic alloy layer. Embodiments further include heating to diffuse the non-ferromagnetic element leaving a layer comprising the non-ferromagnetic element, at a thickness up to about 3 Å, on the magnetic alloy layer, with the amount of the non-ferromagnetic element diffused into the grain boundaries of the magnetic alloy layer gradually decreasing from the upper surface of the magnetic alloy layer toward the underlayer.

摘要翻译： 表现出高信噪比和高热稳定性的磁记录介质通过溅射沉积覆盖在非磁性衬底上的磁性合金（例如，在底层上），加热以消除热不稳定的小晶粒而产生，从而增加磁性合金层的平均晶粒尺寸，但是 使晶粒尺寸分布变窄，沉积包含非铁磁元件的层，然后加热以将非铁磁性元素扩散到热处理的磁性合金层的晶界。 实施例包括在底层上溅射沉积包含Co和Pt的磁性合金层，在约150℃至约600℃的温度下加热，将平均晶粒尺寸增加至约8至约10nm，沉积包含 Cr，Mn或Ta，在磁性合金层上的厚度至多约为例如高达约10埃，并加热使Cr，Mn或Ta扩散到磁性合金层的晶界。 实施例进一步包括加热以使非铁磁性元件扩散，从而在磁合金层上离开包含非铁磁性元件的厚度至多约为3埃，非铁磁性元素的量扩散到晶界 的磁性合金层从磁性合金层的上表面向下层逐渐减小。

公开(公告)号：US06838189B1

公开(公告)日：2005-01-04

申请号：US10394281

申请日：2003-03-24

申请人： Jing Gui ,  Gary Clark Rauch

发明人： Jing Gui ,  Gary Clark Rauch

IPC分类号： G11B5/65 ,  G11B5/84

CPC分类号： G11B5/84 ,  G11B5/8408 ,  Y10T428/12639 ,  Y10T428/12826 ,  Y10T428/12847 ,  Y10T428/12854 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31

摘要： Magnetic recording media exhibiting high SNR and high thermal stability are produced by sputter depositing a magnetic alloy overlying a non-magnetic substrate, e.g., on an underlayer, heating to eliminate thermally unstable small grains thereby increasing the average grain size of the magnetic alloy layer but narrowing the grain size distribution, depositing a layer comprising a non-ferromagnetic element, and then heating to diffuse the non-ferromagnetic element into the grain boundaries of the heat treated magnetic alloy layer. Embodiments include heating to diffuse the non-ferromagnetic element leaving a layer comprising the non-ferromagnetic element, at a thickness up to about 3Å, on the magnetic alloy layer, with the amount of the non-ferromagnetic element diffused into the grain boundaries of the magnetic alloy layer gradually decreasing from the upper surface of the magnetic alloy layer toward the underlayer.

摘要翻译： 表现出高信噪比和高热稳定性的磁记录介质通过溅射沉积覆盖在非磁性衬底上的磁性合金（例如，在底层上），加热以消除热不稳定的小晶粒而产生，从而增加磁性合金层的平均晶粒尺寸，但是 使晶粒尺寸分布变窄，沉积包含非铁磁元件的层，然后加热以将非铁磁性元素扩散到热处理的磁性合金层的晶界。 实施例包括加热以使非铁磁性元件扩散到磁性合金层上离开包含非铁磁性元件的层，厚度达到约3埃，非铁磁性元素的量扩散到 磁性合金层从磁性合金层的上表面向下层逐渐减小。

公开(公告)号：US20130071693A1

公开(公告)日：2013-03-21

申请号：US13620110

申请日：2012-09-14

申请人： Raj Thangaraj ,  Huan Tang ,  Jing Gui ,  John Wang ,  Tommy T. Cheung

发明人： Raj Thangaraj ,  Huan Tang ,  Jing Gui ,  John Wang ,  Tommy T. Cheung

IPC分类号： G11B5/667

CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/7379 ,  G11B5/8404

摘要： A method of manufacturing a granular perpendicular magnetic recording medium with improved corrosion resistance comprises sequential steps of providing a non-magnetic substrate including a surface; forming a soft magnetic underlayer (SUL) over the surface; post-deposition heating the SUL; forming an intermediate layer stack over the heated SUL; and forming at least one granular, magnetically hard perpendicular magnetic recording layer over the intermediate layer stack. Heating of the SUL prior to formation of the intermediate layer stack results in formation of an intermediate layer stack with a smoother surface and a granular perpendicular recording layer with increased corrosion resistance than when SUL post-deposition heating is not performed.

摘要翻译： 制造具有改善的耐腐蚀性的颗粒状垂直磁记录介质的方法包括提供包括表面的非磁性基材的顺序步骤; 在表面上形成软磁性底层（SUL）; 后续加热SUL; 在加热的SUL上形成中间层堆叠; 以及在所述中间层堆叠上形成至少一个颗粒状，磁性硬的垂直磁记录层。 在形成中间层堆叠之前，SUL的加热导致形成具有更平滑的表面的中间层堆叠和具有比不执行SUL后续加热时更高的耐腐蚀性的颗粒垂直记录层。

公开(公告)号：US20080170329A1

公开(公告)日：2008-07-17

申请号：US11651964

申请日：2007-01-11

申请人： Raj Thangaraj ,  Huan Tang ,  Jing Gui ,  John Wang ,  Tommy T. Cheung

发明人： Raj Thangaraj ,  Huan Tang ,  Jing Gui ,  John Wang ,  Tommy T. Cheung

IPC分类号： G11B5/74

CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/7379 ,  G11B5/8404

摘要： A method of manufacturing a granular perpendicular magnetic recording medium with improved corrosion resistance comprises sequential steps of providing a non-magnetic substrate including a surface; forming a soft magnetic underlayer (SUL) over the surface; post-deposition heating the SUL; forming an intermediate layer stack over the heated SUL; and forming at least one granular, magnetically hard perpendicular magnetic recording layer over the intermediate layer stack. Heating of the SUL prior to formation of the intermediate layer stack results in formation of an intermediate layer stack with a smoother surface and a granular perpendicular recording layer with increased corrosion resistance than when SUL post-deposition heating is not performed.

摘要翻译： 制造具有改善的耐腐蚀性的颗粒状垂直磁记录介质的方法包括提供包括表面的非磁性基材的顺序步骤; 在表面上形成软磁性底层（SUL）; 后续加热SUL; 在加热的SUL上形成中间层堆叠; 以及在所述中间层堆叠上形成至少一个颗粒状，磁性硬的垂直磁记录层。 在形成中间层堆叠之前，SUL的加热导致形成具有更平滑的表面的中间层堆叠和具有比不执行SUL后续加热时更高的耐腐蚀性的颗粒垂直记录层。

公开(公告)号：US20050181239A1

公开(公告)日：2005-08-18

申请号：US10776223

申请日：2004-02-12

申请人： Xiaoding Ma ,  Michael Stirniman ,  Raj Thangaraj ,  Jing Gui ,  Tom Nolan ,  Huan Tang

发明人： Xiaoding Ma ,  Michael Stirniman ,  Raj Thangaraj ,  Jing Gui ,  Tom Nolan ,  Huan Tang

IPC分类号： B05D5/12 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/84 ,  G11B5/851 ,  G11B7/24

CPC分类号： G11B5/84 ,  G11B5/656 ,  G11B5/722 ,  G11B5/725 ,  G11B5/7325 ,  G11B5/8408 ,  G11B5/851

摘要： A granular longitudinal or perpendicular magnetic recording medium with enhanced corrosion resistance comprises: (a) a non-magnetic substrate having a surface; (b) a layer stack on the substrate surface, including a granular longitudinal or perpendicular magnetic recording layer having a surface distal the substrate surface treated to provide at least one of: (i) a reduction of nano-scale roughness and porosity; (ii) increased compositional homogeneity; (iii) increased microstructural homogeneity; (iv) preferential removal of at least one element; and (v) increased grain boundary coverage by the subsequently deposited protective overcoat layer; and (c) a protective overcoat layer on the treated surface of the granular magnetic recording layer.

摘要翻译： 具有增强的耐腐蚀性的粒状纵向或垂直磁记录介质包括：（a）具有表面的非磁性基底; （b）衬底表面上的层叠体，包括具有被处理的衬底表面的表面的粒状纵向或垂直磁记录层，以提供以下至少一个：（i）降低纳米级粗糙度和孔隙率; （ii）增加组成均匀性; （iii）显微组织均匀性增加; （iv）优先除去至少一种元素; 和（v）随后沉积的保护性外涂层增加了晶界覆盖度; 和（c）粒状磁记录层的被处理表面上的保护性外涂层。

公开(公告)号：US20100124672A1

公开(公告)日：2010-05-20

申请号：US12272467

申请日：2008-11-17

申请人： Raj Thangaraj ,  Charles F. Brucker ,  Huan Tang ,  Jing Gui

发明人： Raj Thangaraj ,  Charles F. Brucker ,  Huan Tang ,  Jing Gui

IPC分类号： G11B5/82 ,  B05D5/00 ,  B32B9/00

CPC分类号： G11B5/722 ,  G11B5/82

摘要： A perpendicular magnetic recording media having an amorphous corrosion-resistant cap layer is disclosed. Preferably, the cap layer is a chromium alloy comprising Pt and C. A method of manufacturing the media is also disclosed.

摘要翻译： 公开了一种具有无定形耐腐蚀盖层的垂直磁记录介质。 优选地，盖层是包含Pt和C的铬合金。还公开了制造介质的方法。

公开(公告)号：US20070087227A1

公开(公告)日：2007-04-19

申请号：US11249469

申请日：2005-10-14

申请人： Xiaoding Ma ,  Tom Nolan ,  Raj Thangaraj ,  Michael Stirniman ,  Samuel Harkness ,  Huan Tang ,  Jing Gui ,  Joel Weiss ,  Gary Rauch

发明人： Xiaoding Ma ,  Tom Nolan ,  Raj Thangaraj ,  Michael Stirniman ,  Samuel Harkness ,  Huan Tang ,  Jing Gui ,  Joel Weiss ,  Gary Rauch

IPC分类号： G11B5/65 ,  C23C14/00

CPC分类号： G11B5/8408 ,  G11B5/65 ,  G11B5/851

摘要： A granular magnetic recording medium comprises a non-magnetic substrate having a surface, a layer stack on the substrate surface, including an outermost granular magnetic recording layer, a cap layer on the granular magnetic recording layer, having a sputter-etched outer surface, and a protective overcoat layer on the sputter-etched outer surface of the cap layer.

摘要翻译： 粒状磁记录介质包括具有表面的非磁性基底，在基底表面上的层叠，包括最外层的粒状磁记录层，粒状磁记录层上的盖层，具有溅射蚀刻的外表面，以及 覆盖层的溅射蚀刻外表面上的保护性外涂层。

公开(公告)号：US06680106B1

公开(公告)日：2004-01-20

申请号：US10127771

申请日：2002-04-23

申请人： Raj Thangaraj ,  Charles Frederick Brucker ,  Huan Tang ,  Jing Gui ,  Gary Rauch

发明人： Raj Thangaraj ,  Charles Frederick Brucker ,  Huan Tang ,  Jing Gui ,  Gary Rauch

IPC分类号： G11B572

CPC分类号： G11B5/722 ,  Y10T428/265

摘要： Corrosion protection of magnetic recording media is achieved by providing a thin protective barrier layer comprising ruthenium on the magnetic layer. Embodiments include forming a corrosion barrier layer less than 10 Å of elemental ruthenium, a ruthenium oxide, a ruthenium alloy, a layer comprising mixed oxides of ruthenium and an alloying element, a composite of a ruthenium layer and a layer of ruthenium oxide or a composite of a ruthenium alloy layer and a layer of mixed oxides of ruthenium and an alloying element. A carbon containing an overcoat is then formed, as at a thickness of about 10 Å to 50 Å, on the corrosion protective layer.

摘要翻译： 通过在磁性层上提供包含钌的薄的保护性阻挡层来实现磁记录介质的腐蚀保护。 实施例包括形成小于元素钌的腐蚀阻隔层，氧化钌，钌合金，包含钌和合金元素的混合氧化物的层，钌层和氧化钌层的复合物或复合材料 的钌合金层和钌和合金元素的混合氧化物层。 然后在腐蚀保护层上形成含有外涂层的碳，厚度为约至Å。

公开(公告)号：US06660413B1

公开(公告)日：2003-12-09

申请号：US09964492

申请日：2001-09-28

申请人： Raj Thangaraj ,  Kueir-Weei Chour ,  Xiaoding Ma ,  Huan Tang ,  Jing Gui

发明人： Raj Thangaraj ,  Kueir-Weei Chour ,  Xiaoding Ma ,  Huan Tang ,  Jing Gui

IPC分类号： G11B566

CPC分类号： G11B5/8408 ,  G11B5/72 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12806 ,  Y10T428/12812 ,  Y10T428/12819 ,  Y10T428/12826 ,  Y10T428/1284

摘要： A component of a recording device comprising a magnetic layer, means for improving corrosion resistance of the magnetic layer and a carbon overcoat, and a method of making and using the same are disclosed. The means for improving corrosion resistance of the magnetic layer comprises a sealing layer comprising a refractory metal or a refractory metal-containing alloy.

摘要翻译： 公开了一种包括磁性层的记录装置的组件，用于提高磁性层和碳外涂层的耐腐蚀性的装置及其制造和使用方法。 用于提高磁性层的耐腐蚀性的方法包括含有难熔金属或难熔金属的合金的密封层。