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1. 发明授权

US07625646B2 Perpendicular magnetic recording medium and method of manufacturing it 失效
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：US07625646B2
公开(公告)日：2009-12-01
申请号：US11354085
申请日：2006-02-15
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/732 , G11B5/7325 , G11B5/84
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.
摘要翻译：公开了一种具有较低介质噪声，不易受热波动和高记录分辨率的垂直磁记录介质及其制造方法。作为通过多个底层在非磁性基板上形成记录层时形成金属层的步骤，重复平均厚度为0.2nm以下的氧化物层的工序，晶粒磁性隔离，而不会干扰垂直磁记录介质的记录层的晶粒的取向，或不降低记录层的晶粒的磁特性。

2. 发明授权

US07033686B2 Perpendicular magnetic recording medium and method of manufacturing it 失效
公开(公告)号：US07033686B2
公开(公告)日：2006-04-25
申请号：US10701603
申请日：2003-11-06
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/732 , G11B5/7325 , G11B5/84
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.

3. 发明授权

US07701667B2 Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
标题翻译：垂直磁记录介质及使用其的磁存储装置
公开(公告)号：US07701667B2
公开(公告)日：2010-04-20
申请号：US11651922
申请日：2007-01-09
申请人： Ichiro Tamai , Ikuko Takekuma , Hiroaki Nemoto , Yoshiyuki Hirayama
发明人： Ichiro Tamai , Ikuko Takekuma , Hiroaki Nemoto , Yoshiyuki Hirayama
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/656 , G11B5/667
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）。

4. 发明申请

US20090195924A1 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same 有权
标题翻译：垂直磁记录介质和使用其的磁记录/再现装置
公开(公告)号：US20090195924A1
公开(公告)日：2009-08-06
申请号：US12288654
申请日：2008-10-21
申请人： Hiroaki Nemoto , Ikuko Takekuma , Ichiro Tamai , Yoshiyuki Hirayama
发明人： Hiroaki Nemoto , Ikuko Takekuma , Ichiro Tamai , Yoshiyuki Hirayama
IPC分类号： G11B5/127 , G11B5/667
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。

5. 发明授权

US07510789B2 Perpendicular magnetic recording media 失效
标题翻译：垂直磁记录介质
公开(公告)号：US07510789B2
公开(公告)日：2009-03-31
申请号：US11148164
申请日：2005-06-09
申请人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
IPC分类号： G11B5/66
CPC分类号： B82Y10/00 , G11B5/656 , G11B5/66 , G11B5/7325 , G11B5/743 , Y10T428/24802
摘要： A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.
摘要翻译：垂直磁记录介质包括由软磁膜和垂直磁化膜之间的多层形成的中间膜。中间膜包括至少两层，即含氧层或含有氮，硅或碳的非金属元素层，以及在含氧层或非金属元素的表面侧上形成的金属层包含层。金属层包括多个孤立的岛状结构。垂直磁化膜的晶粒形成为对应于孤立的岛状结构。结果，获得高记录密度。

6. 发明授权

US06916557B2 Perpendicular magnetic recording media 失效
公开(公告)号：US06916557B2
公开(公告)日：2005-07-12
申请号：US10372335
申请日：2003-02-25
申请人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
IPC分类号： G11B5/65 , B32B3/00 , G11B5/147 , G11B5/64 , G11B5/66 , G11B5/667 , G11B5/70 , G11B5/73 , G11B5/851
CPC分类号： B82Y10/00 , G11B5/656 , G11B5/66 , G11B5/7325 , G11B5/743 , Y10T428/24802
摘要： A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.

7. 发明授权

US08771849B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same 有权
标题翻译：垂直磁记录介质和使用其的磁记录/再现装置
公开(公告)号：US08771849B2
公开(公告)日：2014-07-08
申请号：US12288654
申请日：2008-10-21
申请人： Hiroaki Nemoto , Ikuko Takekuma , Ichiro Tamai , Yoshiyuki Hirayama
发明人： Hiroaki Nemoto , Ikuko Takekuma , Ichiro Tamai , Yoshiyuki Hirayama
IPC分类号： G11B5/66
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。

8. 发明申请

US20070188924A1 Perpendicular magnetic recording medium and magnetic storage apparatus using the same 有权
标题翻译：垂直磁记录介质及使用其的磁存储装置
公开(公告)号：US20070188924A1
公开(公告)日：2007-08-16
申请号：US11651922
申请日：2007-01-09
申请人： Ichiro Tamai , Ikuko Takekuma , Hiroaki Nemoto , Yoshiyuki Hirayama
发明人： Ichiro Tamai , Ikuko Takekuma , Hiroaki Nemoto , Yoshiyuki Hirayama
IPC分类号： G11B5/82
CPC分类号： G11B5/66 , G11B5/656 , G11B5/667
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Ms 1（emu /立方厘米）时，第二记录层的饱和磁化强度设定为Ms 2（emu每立方厘米），第一记录层膜厚设定为t 1（ nm），则（Ms 2 -Ms 1）xt 1将大于0（每平方厘米的记忆）并小于0.15（每平方厘米的记忆）。

9. 发明申请

US20060134467A1 Perpendicular magnetic recording medium and method of manufacturing it 失效
公开(公告)号：US20060134467A1
公开(公告)日：2006-06-22
申请号：US11354085
申请日：2006-02-15
申请人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Ichiro Tamai , Takayuki Ichihara , Hiroyuki Nakagawa , Hiroaki Nemoto , Mineaki Kodama , Ikuko Takekuma
IPC分类号： G11B5/66 , C23C14/00
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/732 , G11B5/7325 , G11B5/84
摘要： Disclosed are a perpendicular magnetic recording medium with lower medium noise, insusceptible to thermal fluctuation and high recording resolution and a method of manufacturing it. As the step of forming a metal layer at the time of forming a recording layer on a non-magnetic substrate via a plurality of underlayers and the step of forming an oxide layer with an average thickness of 0.2 nm or less are repeated, the crystal grains are magnetically isolated without disturbing the orientation of the crystal grain of the recording layer of the perpendicular magnetic recording medium or without degrading the magnetic characteristic of the crystal grain of the recording layer.

10. 发明申请

US20050227121A1 Perpendicular magnetic recording media 失效
标题翻译：垂直磁记录介质
公开(公告)号：US20050227121A1
公开(公告)日：2005-10-13
申请号：US11148164
申请日：2005-06-09
申请人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
发明人： Yoshiyuki Hirayama , Hiroyuki Nakagawa , Hiroaki Nemoto , Ichiro Tamai , Ikuko Takekuma
IPC分类号： G11B5/65 , B32B3/00 , G11B5/147 , G11B5/64 , G11B5/66 , G11B5/667 , G11B5/70 , G11B5/73 , G11B5/851
CPC分类号： B82Y10/00 , G11B5/656 , G11B5/66 , G11B5/7325 , G11B5/743 , Y10T428/24802
摘要： A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.
摘要翻译：垂直磁记录介质包括由软磁膜和垂直磁化膜之间的多层形成的中间膜。中间膜包括至少两层，即含氧层或含有氮，硅或碳的非金属元素层，以及在含氧层或非金属元素的表面侧上形成的金属层包含层。金属层包括多个孤立的岛状结构。垂直磁化膜的晶粒形成为对应于孤立的岛状结构。结果，获得高记录密度。

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