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11. 发明申请

US20050058854A1 Perpendicular magnetic recording medium and manufacturing of the same 审中-公开
标题翻译：垂直磁记录介质和制造相同
公开(公告)号：US20050058854A1
公开(公告)日：2005-03-17
申请号：US10875601
申请日：2004-06-25
申请人： Ikuko Takekuma , Hiroyuki Nakagawa , Ichiro Tamai , Yoshiyuki Hirayama , Yuzuru Hosoe
发明人： Ikuko Takekuma , Hiroyuki Nakagawa , Ichiro Tamai , Yoshiyuki Hirayama , Yuzuru Hosoe
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/73 , G11B5/84 , G11B5/851 , G11B7/26
CPC分类号： G11B5/667 , G11B5/656
摘要： Disclosed here is a perpendicular magnetic recording medium for realizing a high media S/N value without degrading the magnetic isolation of crystal grains from each another. The perpendicular magnetic recording medium comprises a substrate, a soft magnetic underlayer formed on the substrate, an intermediate layer formed on the soft magnetic underlayer, and a magnetic recording layer formed on the intermediate layer. The intermediate layer consists of at least two or more layers and contains Ru or an Ru alloy and the magnetic recording layer is made of a material containing a CoCrPt alloy and oxygen. The crystallo graphic orientation of the recording layer can be improved enough without increasing the crystal grain size if a full width at half-maximum Δθ50 of the Rocking curves of the Ru (0002) diffraction peak measured by an X-ray diffraction method is 5° and under.
摘要翻译：这里公开的是用于实现高介质S / N值而不降低晶粒的磁隔离的垂直磁记录介质。垂直磁记录介质包括基板，形成在基板上的软磁性底层，形成在软磁性底层上的中间层和形成在中间层上的磁记录层。中间层由至少两层或更多层组成，并含有Ru或Ru合金，磁记录层由含有CoCrPt合金和氧的材料制成。如果通过X射线衍射法测量的Ru（0002）衍射峰的摇摆曲线的半最大值Deltatheta50的全宽为5°，则记录层的结晶图形取向可以足够改善，而不增加晶粒尺寸和下。

12. 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。

13. 发明申请

US20080186627A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH GRANULAR STRUCTURED MAGNETIC RECORDING LAYER, METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING APPARATUS 审中-公开
标题翻译：具有颗粒结构的磁记录层的周期性磁记录介质，其制造方法和磁记录装置
公开(公告)号：US20080186627A1
公开(公告)日：2008-08-07
申请号：US12061518
申请日：2008-04-02
申请人： Yoshiyuki Hirayama , Ikuko Takekuma , Ichiro Tamai
发明人： Yoshiyuki Hirayama , Ikuko Takekuma , Ichiro Tamai
IPC分类号： G11B5/33 , G11B5/66 , C23C14/34
CPC分类号： G11B5/7325 , C23C14/06 , C23C14/3492 , G11B5/65 , G11B5/851 , Y02T50/67
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium having a granular structured magnetic recording layer including many columnar grains, and grain boundary layers containing oxide, wherein a high medium S/N ratio is obtained while securing head flyability and durability. In an embodiment, the perpendicular magnetic recording medium includes a granular structured magnetic recording layer having many columnar grains, as well as grain boundary layers including oxide respectively. Assuming that the columnar grains are divided equally in the film thickness direction into a protective layer side portion and an intermediate layer side portion, and the diameter of the protective layer side portion is larger than that of the intermediate layer side portion.
摘要翻译：本发明的实施例提供一种垂直磁记录介质，其具有包括许多柱状颗粒的粒状结构磁记录层和含有氧化物的晶界层，其中在确保磁头可飞行性和耐久性的同时获得高介质S / N比。在一个实施例中，垂直磁记录介质包括具有许多柱状晶粒的颗粒结构磁记录层以及分别包括氧化物的晶界层。假设柱状晶粒在膜厚度方向上被均等地分割成保护层侧部分和中间层侧部分，并且保护层侧部分的直径大于中间层侧部分的直径。

14. 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.

15. 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。

16. 发明授权

US08709618B2 Magnetic storage apparatus 有权
标题翻译：磁存储装置
公开(公告)号：US08709618B2
公开(公告)日：2014-04-29
申请号：US11726099
申请日：2007-03-20
申请人： Ikuko Takekuma , Hiroyuki Nakagawa , Hiroaki Nemoto , Yoshiyuki Hirayama
发明人： Ikuko Takekuma , Hiroyuki Nakagawa , Hiroaki Nemoto , Yoshiyuki Hirayama
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/11 , G11B5/1278 , G11B5/3116 , G11B5/3146 , G11B5/315 , G11B5/3967 , G11B5/656
摘要： According to embodiments of the present invention, a shielded pole writer and a perpendicular magnetic recording medium suitable thereto are combined to provide high medium SNR and excellent OW characteristic simultaneously. A perpendicular magnetic recording medium of a magnetic storage apparatus mounting a shielded pole writer, including a perpendicular magnetic recording medium having a recording layer of a three layered structure is used. A first recording layer has a granular structure consisting of grain boundaries containing an oxide and columnar grains comprising a CoCrPt alloy, in which a second recording layer and a third recording layer formed thereabove comprise Co as a main ingredient, contain Cr and do not contain an oxide, and the Cr concentration in the second recording layer is lower than the Cr concentration in the third recording layer.
摘要翻译：根据本发明的实施例，组合屏蔽极写入器和适合于其的垂直磁记录介质，以同时提供高中等信噪比和优异的OW特性。使用安装屏蔽极写入器的磁存储装置的垂直磁记录介质，其包括具有三层结构的记录层的垂直磁记录介质。第一记录层具有由包含氧化物的晶界和包含CoCrPt合金的柱状晶粒构成的粒状结构，其中形成在其上的第二记录层和第三记录层包含Co作为主要成分，并且不含有并且第二记录层中的Cr浓度低于第三记录层中的Cr浓度。

17. 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）。

18. 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。

19. 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）。

20. 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.

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