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公开(公告)号：US20110164336A1
公开(公告)日：2011-07-07
申请号：US12984352
申请日：2011-01-04
摘要： Since the surface roughness of a recording layer get larger in the process of fabricating a patterned medium, the spacing between a head and the medium is widened. As a result, the recording performance and corrosion resistance of the medium are degraded. In the patterned medium, a recording layer includes one layer of a crystalline magnetic film or plural layers of crystalline magnetic films, and a magnetic film of an amorphous structure located on the outermost surface of the crystalline magnetic films. The compositional elements of the magnetic film of the amorphous structure are identical to those of the crystalline magnetic film located immediately under the magnetic film. In a fabrication method thereof, the surface of the crystalline magnetic film is turned into amorphous in order to form the magnetic film of the amorphous structure.
摘要翻译： 由于在制造图案化介质的过程中记录层的表面粗糙度变大，所以头部和介质之间的间隔变宽。 结果，介质的记录性能和耐腐蚀性降低。 在图案化介质中，记录层包括一层结晶磁性膜或多层结晶磁性膜，以及位于结晶磁性膜的最外表面上的非晶结构的磁性膜。 无定形结构的磁性膜的组成元素与位于磁性膜正下方的结晶磁性膜的组成元素相同。 在其制造方法中，为了形成非晶结构的磁性膜，结晶磁性膜的表面变成无定形。
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42.发明授权公开(公告)号：US07875373B2
公开(公告)日：2011-01-25
申请号：US11985310
申请日：2007-11-13
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Reiko Arai
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Reiko Arai
IPC分类号： G11B5/65
CPC分类号： G11B5/65 , G11B5/7325 , G11B5/851 , Y10T428/11
摘要： Embodiments in accordance with the present invention help to obtain a perpendicular magnetic recording medium having a granular structure, excellent recording/reproducing properties, and excellent durability. According to one embodiment, a recording layer includes a layer which has crystal grains mainly composed of cobalt and crystal grain boundaries mainly composed of the oxide; the oxygen content of the recoding layer is changed in the film thickness direction; the oxygen content in the area in the vicinity of the interface between the recording layer and the intermediate layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer; and the oxygen content in the area in the vicinity of the interface between the recording layer and the protective layer is made lower than the oxygen content in the area in the vicinity of the center of the recording layer.
摘要翻译： 根据本发明的实施例有助于获得具有颗粒结构的良好的记录/再现性能和优异的耐久性的垂直磁记录介质。 根据一个实施例，记录层包括主要由钴构成的晶粒和主要由氧化物构成的晶界的层; 记录层的氧含量在膜厚方向上变化; 记录层和中间层之间的界面附近的区域中的氧含量低于记录层中心附近的区域中的氧含量; 并且将记录层和保护层之间的界面附近的区域中的氧含量设定得低于记录层中心附近的区域中的氧含量。
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43.发明授权公开(公告)号：US07701667B2
公开(公告)日：2010-04-20
申请号：US11651922
申请日：2007-01-09
IPC分类号： G11B5/66
摘要： Embodiments in accordance with the present invention provide a perpendicular recording medium with low noise and high recording density by reducing the effects from noise generated from the vicinity of the interface with the intermediate layer of the recording layer, in a perpendicular recording medium utilizing a granular recording layer containing oxygen or oxide additive in a cobalt-chromium alloy formed on an intermediate layer with a ruthenium or ruthenium alloy layer. A first recording layer and a second recording layer are formed in order on an intermediate layer of ruthenium or ruthenium alloy. The first recording layer and the second recording layer are comprised of cobalt as the main material in a granular structure containing chromium and oxygen. The saturation magnetization of the first recording layer is lower than the saturation magnetization of the second recording layer. When a first recording layer saturation magnetization is set as Ms1(emu per cubic centimeter), a second recording layer saturation magnetization is set as Ms2(emu per cubic centimeter), and the first recording layer film thickness is set to t1 (nm), then (Ms2−Ms1)×t1 will be larger than 0 (memu per square centimeter) and smaller than 0.15 (memu per square centimeter).
摘要翻译： 根据本发明的实施例通过减少在与记录层的中间层的界面附近产生的噪声的影响，在使用粒状记录的垂直记录介质中提供具有低噪声和高记录密度的垂直记录介质 在含有钌或钌合金层的中间层上形成的钴 - 铬合金中含有氧或氧化物添加剂的层。 在钌或钌合金的中间层上依次形成第一记录层和第二记录层。 第一记录层和第二记录层由包含铬和氧的颗粒结构中的钴作为主要材料组成。 第一记录层的饱和磁化强度低于第二记录层的饱和磁化强度。 当第一记录层的饱和磁化强度设定为Ms1（emu /立方厘米）时，第二记录层的饱和磁化强度设定为Ms2（emu /立方厘米），第一记录层膜厚设定为t1（nm） 那么（Ms2-Ms1）×t1将大于0（每平方厘米的记忆），小于0.15（每平方厘米的记忆）。
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44.发明授权Perpendicular magnetic recording media and magnetic storage apparatus using the same 有权垂直磁记录介质及使用其的磁存储装置公开(公告)号：US07368185B2
公开(公告)日：2008-05-06
申请号：US10977552
申请日：2004-10-29
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is equal to or smaller than about 20 nm but also exhibits excellent crystallographic texture and that exhibits small medium noise, excellent thermal stability, and high write-ability. In one embodiment, a perpendicular magnetic recording medium has at least a soft-magnetic underlayer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a magnetic recording layer successively formed on a substrate. The magnetic recording layer is composed of ferromagnetic crystal grains and oxides or nitrides, the third intermediate layer is composed of Ru or an Ru alloy, the second intermediate layer is composed of a metal or an alloy having the face-centered cubic lattice structure, and the first intermediate layer is composed of a metal or an alloy having the hexagonal close-packed structure.
摘要翻译： 本发明的实施例提供了一种垂直磁记录介质，其不仅在中间层的厚度等于或小于约20的介质的区域中彼此之间实现磁记录层中的晶粒的磁隔离 nm，但也具有优异的晶体学结构，表现出中等的中等噪声，优异的热稳定性和高的写入能力。 在一个实施例中，垂直磁记录介质至少具有在基板上依次形成的软磁性底层，第一中间层，第二中间层，第三中间层和磁记录层。 磁记录层由铁磁性晶粒和氧化物或氮化物构成，第三中间层由Ru或Ru合金构成，第二中间层由具有面心立方晶格结构的金属或合金构成， 第一中间层由具有六方密堆积结构的金属或合金构成。
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45.发明申请Perpendicular magnetic recording media and magnetic storage apparatus using the same 有权垂直磁记录介质及使用其的磁存储装置公开(公告)号：US20050142388A1
公开(公告)日：2005-06-30
申请号：US10977552
申请日：2004-10-29
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium that not only attains the magnetic isolation of crystal grains in a magnetic recording layer from one another in a region of the medium in which the thickness of an intermediate layer is equal to or smaller than about 20 nm but also exhibits excellent crystallographic texture and that exhibits small medium noise, excellent thermal stability, and high write-ability. In one embodiment, a perpendicular magnetic recording medium has at least a soft-magnetic underlayer, a first intermediate layer, a second intermediate layer, a third intermediate layer, and a magnetic recording layer successively formed on a substrate. The magnetic recording layer is composed of ferromagnetic crystal grains and oxides or nitrides, the third intermediate layer is composed of Ru or an Ru alloy, the second intermediate layer is composed of a metal or an alloy having the face-centered cubic lattice structure, and the first intermediate layer is composed of a metal or an alloy having the hexagonal close-packed structure.
摘要翻译： 本发明的实施例提供了一种垂直磁记录介质，其不仅在中间层的厚度等于或小于约20的介质的区域中彼此之间实现磁记录层中的晶粒的磁隔离 nm，但也具有优异的晶体学结构，表现出中等的中等噪声，优异的热稳定性和高的写入能力。 在一个实施例中，垂直磁记录介质至少具有在基板上依次形成的软磁性底层，第一中间层，第二中间层，第三中间层和磁记录层。 磁记录层由铁磁性晶粒和氧化物或氮化物构成，第三中间层由Ru或Ru合金构成，第二中间层由具有面心立方晶格结构的金属或合金构成， 第一中间层由具有六方密堆积结构的金属或合金构成。
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公开(公告)号：US07651795B2
公开(公告)日：2010-01-26
申请号：US11227675
申请日：2005-09-14
IPC分类号： G11B5/65
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/656
摘要： Embodiments of the embodiment are directed to reducing the inter-granular exchange coupling of an oxide granular medium and obtaining a high media S/N value, resulting in an areal recording density greater than 23 gigabits per square centimeter or more being achieved. In one embodiment, a magnetic recording medium comprises a structure laminating a soft-magnetic underlayer, a lower intermediate layer including Ru, an upper intermediate layer consisting of Ru crystal grains and oxide crystal grain boundaries, a magnetic recording layer consisting of crystal grains and oxide crystal grain boundaries, in order, on a substrate, growing crystal grains of the magnetic recording layer epitaxially on the Ru crystal grains of the upper intermediate layer, and growing the crystal grain boundaries of the magnetic recording layer on the crystal grain boundaries of the upper intermediate layer.
摘要翻译： 实施例的实施例涉及减少氧化物颗粒介质的颗粒间交换耦合并获得高介质S / N值，导致实现大于23千兆比特/平方厘米或更大的面积记录密度。 在一个实施例中，磁记录介质包括层压软磁性底层，包含Ru的下中间层，由Ru晶粒和氧化物晶界组成的上中间层的结构，由晶粒和氧化物组成的磁记录层 晶粒边界依次在衬底上，外延地在上层中间层的Ru晶粒上生长磁记录层的晶粒，并且使上述记录层的晶界上的磁记录层的晶界生长 中间层。
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47.发明申请公开(公告)号：US20090195924A1
公开(公告)日：2009-08-06
申请号：US12288654
申请日：2008-10-21
CPC分类号： G11B5/732 , G11B5/65 , G11B5/66 , G11B5/667 , G11B5/7325
摘要： Embodiments of the present invention help allow accurate control of the magnetization reversal in a magnetic recording layer in small reversal units, whereby high-density recording can be achieved. According to one embodiment, by forming an intermediate layer having a granular structure similar to that of the magnetic recording layer below the magnetic recording layer, a continuous crystal grain boundary is formed at the interface between the magnetic recording layer and the intermediate layer, thereby preventing incomplete formation of the crystal grain boundary found in the initial growth layer of the magnetic recording layer. The intermediate layer comprises a non-magnetic alloy comprising Co and Cr as its main components and an oxide such as Al, Cr, Hf. Mg, Nb, Si, Ta, Ti and Zr. Further, the average content of the oxygen element in the intermediate layer is in the range from 6 at % to 20 at %.
摘要翻译： 本发明的实施例有助于在小的反转单元中精确地控制磁记录层中的磁化反转，由此可以实现高密度记录。 根据一个实施例，通过在磁记录层下方形成具有类似于磁记录层的颗粒结构的中间层，在磁记录层和中间层之间的界面处形成连续的晶界，从而防止 在磁记录层的初始生长层中发现的晶界的不完全的形成。 中间层包括以Co和Cr为主要成分的非磁性合金和Al，Cr，Hf等氧化物。 Mg，Nb，Si，Ta，Ti和Zr。 此外，中间层中的氧元素的平均含量在6at％至20at％的范围内。
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48.发明授权公开(公告)号：US07261958B2
公开(公告)日：2007-08-28
申请号：US10067333
申请日：2002-02-07
CPC分类号： G11B5/66 , G11B5/00 , G11B5/012 , G11B2005/0002 , G11B2005/0016
摘要： A magnetic recording medium having at least two magnetic layers and a non-magnetic intermediate layer held between them. The first magnetic layer (which is closer to the substrate than the non-magnetic intermediate layer) is formed from an alloy composed of Co, Pr, and Cr, with Pt content being 3-9 at %. The second magnetic layer (which is farther from the substrate than the non-magnetic intermediate layer) is formed from a Co-based alloy containing Pt, Cr, and B. The first and second magnetic layers are magnetized in the mutually antiparallel direction in the absence of an applied magnetic field.The magnetic recording medium is characterized by good thermal stability for recording bits, high recording resolution, and low media noise. It is suitable for a magnetic storage for high recording density with high reliability.
摘要翻译： 具有至少两个磁性层和保持在它们之间的非磁性中间层的磁记录介质。 第一磁性层（其比非磁性中间层更靠近基板）由Co，Pr和Cr组成的合金形成，Pt含量为3-9原子％。 第二磁性层（其比非磁性中间层离基板更远）由含有Pt，Cr和B的Co基合金形成。第一和第二磁性层在相互反平行的方向上被磁化 不存在施加的磁场。 磁记录介质的特征在于用于记录位的良好热稳定性，高记录分辨率和低介质噪声。 适用于具有高可靠性的高记录密度的磁存储。
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49.发明申请公开(公告)号：US20060088734A1
公开(公告)日：2006-04-27
申请号：US11243012
申请日：2005-10-03
申请人： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
发明人： Reiko Arai , Yoshiyuki Hirayama , Yuzuru Hosoe , Tomio Iwasaki , Yoko Ogawa , Ikuko Takekuma
摘要： Embodiments of the invention are directed to a medium which provides high media S/N and good corrosion resistance. According to one embodiment, in a perpendicular magnetic recording medium at least comprising a soft-magnetic underlayer, a seed layer, an intermediate layer, a magnetic recording layer and an overcoat layer which are stacked over a substrate in order, the magnetic recording layer has a granular structure which includes many columnar grains of CoCrPt alloy and a grain boundary layer containing an oxide, the seed layer is made of TaNi alloy or TaTi alloy and the intermediate layer is made of Ru or Ru alloy which contains 80 at. % Ru or more.
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50.发明授权Magnetic recording medium with controlled grain diameters and method for manufacturing the same 失效具有受控晶粒直径的磁记录介质及其制造方法公开(公告)号：US06884521B2
公开(公告)日：2005-04-26
申请号：US10358342
申请日：2003-02-05
CPC分类号： G11B5/732 , G11B5/65 , G11B5/667 , G11B5/7325 , G11B5/8404 , Y10T29/49021 , Y10T29/49025 , Y10T29/49032 , Y10T29/49041 , Y10T29/49044 , Y10T29/49078 , Y10T29/49224 , Y10T428/12465 , Y10T428/12757 , Y10T428/24355 , Y10T428/31
摘要： Disclosed is a magnetic recording medium and a method for manufacturing the same to provide a magnetic recording medium reducing medium noise and having excellent thermal stability. The magnetic recording medium includes a substantially amorphous seed layer and a polycrystal underlayer made of crystal grains having a substantially columnar structure, the polycrystal underlayer contacting thereto. In a boundary between the seed layer and the underlayer, fine grooves having a period up to as large as the magnetic layer crystal grain diameter are formed in the disc circumferential direction. Accordingly, the magnetic recording medium is allowed to have a grain shape with a value obtained by dividing the average grain diameter for the disc circumferential direction by the average grain diameter for the disc radial direction of no less than 0.5 and no more than 0.9, thus achieving simultaneously reduction of the medium noise and thermal stability.
摘要翻译： 公开了一种磁记录介质及其制造方法，以提供磁记录介质降低介质噪声并具有优异的热稳定性。 磁记录介质包括基本上无定形的种子层和由具有基本上柱状结构的晶粒制成的多晶底层，多晶底层与其接触。 在种子层和底层之间的边界处，在盘周向形成有具有与磁性层晶粒直径一样大的周期的细槽。 因此，使磁记录介质具有通过将盘圆周方向的平均粒径除以盘径向的平均粒径为不小于0.5且不大于0.9而获得的值的晶粒形状，因此 实现中等噪声和热稳定性的同时降低。
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