公开(公告)号：US08703307B2

公开(公告)日：2014-04-22

申请号：US12903135

申请日：2010-10-12

申请人： Akemi Hirotsune ,  Yotsuo Yahisa ,  Ichiro Tamai

发明人： Akemi Hirotsune ,  Yotsuo Yahisa ,  Ichiro Tamai

IPC分类号： G11B5/66

CPC分类号： G11B5/82 ,  G11B5/732 ,  G11B5/7325

摘要： According to one embodiment, a perpendicular magnetic recording medium includes a soft magnetic underlayer formed above a substrate, a lower seed layer formed above the soft magnetic underlayer, at least one upper seed layer formed above the lower seed layer, an interlayer formed above the at least one upper seed layer, a perpendicular recording layer formed above the interlayer, and a protective layer formed above the perpendicular recording layer, wherein the at least one upper seed layer comprises Ni or a Ni based alloy including N, and wherein the lower seed layer includes Ni and at least one element selected from a group consisting of: W and Cr. Other embodiments are described herein regarding perpendicular magnetic recording systems and methods of producing perpendicular magnetic media.

摘要翻译： 根据一个实施例，垂直磁记录介质包括形成在基底上方的软磁性底层，形成在软磁性底层上方的下部种子层，形成在下部种子层上方的至少一个上部种子层， 至少一个上部种子层，形成在中间层上方的垂直记录层和形成在垂直记录层上方的保护层，其中至少一个上部种子层包含Ni或包含N的Ni基合金，并且其中下部种子层 包括Ni和选自由W和Cr组成的组中的至少一种元素。 本文描述了关于垂直磁记录系统和产生垂直磁性介质的方法的其它实施例。

公开(公告)号：US20120099220A1

公开(公告)日：2012-04-26

申请号：US12909783

申请日：2010-10-21

申请人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune

发明人： Ichiro Tamai ,  Yotsuo Yahisa ,  Akemi Hirotsune

IPC分类号： G11B21/02 ,  B05D5/12 ,  G11B5/706

CPC分类号： G11B5/7325 ,  G11B5/7379

摘要： In one embodiment, a perpendicular magnetic recording medium includes a crystalline seed layer having a pseudo-hcp structure with stacking faults formed above a soft magnetic underlayer, a first interlayer comprising Ru and one of W, Ta, Mo, and Nb formed above the crystalline seed layer, a second interlayer formed above the first interlayer, and a magnetic recording layer formed above the second interlayer. The first interlayer has a W concentration between about 32 at % and 50 at %, Mo in a concentration between about 36 at % and 52 at %, Ta in a concentration between about 20 at % and 30 at %, or Nb in a concentration between about 7 at % and 30 at %. In another embodiment, a system includes a recording medium as described above, a magnetic head for reading from and/or writing to the medium, a head slider for supporting the head, and a control unit coupled to the head.

摘要翻译： 在一个实施例中，垂直磁记录介质包括具有形成在软磁性底层上方的堆垛层错的伪hcp结构的结晶种子层，包含Ru和在晶体上形成的W，Ta，Mo和Nb中的一个的第一中间层 晶种层，形成在第一中间层上方的第二中间层和形成在第二中间层上方的磁记录层。 第一中间层具有约32at％至50at％的W浓度，浓度在约36at％至52at％之间的Mo，浓度在约20at％至30at％之间的Ta或浓度为Nb 在约7at％和30at％之间。 在另一个实施例中，系统包括如上所述的记录介质，用于从介质读取和/或写入介质的磁头，用于支撑磁头的磁头滑块以及耦合到磁头的控制单元。

公开(公告)号：US07651795B2

公开(公告)日：2010-01-26

申请号：US11227675

申请日：2005-09-14

申请人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

发明人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

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。

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。

公开(公告)号：US06881504B2

公开(公告)日：2005-04-19

申请号：US10650809

申请日：2003-08-29

申请人： Tomoo Yamamoto ,  Ichiro Tamai ,  Akira Ishikawa

发明人： Tomoo Yamamoto ,  Ichiro Tamai ,  Akira Ishikawa

IPC分类号： C23C14/06 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/738 ,  H01F10/26 ,  H01F10/30 ,  G11B5/70

CPC分类号： G11B5/667 ,  G11B5/66 ,  G11B5/7325 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/265

摘要： A large-capacity magnetic storage apparatus is disclosed, capable of performing ultra-high density magnetic recording of 50 gigabits or more per 1 square inch. In a perpendicular magnetic recording medium having a non-magnetic intermediate layer and a magnetic recording layer sequentially formed, the non-magnetic intermediate layer is composed of a layer having a face-centered cubic structure and containing a non-magnetic elements excluding Pt. Specifically, the intermediate layer mainly contains at least one selected from the group of elements constituted of Al, Cu, Rh, Pd, Ag, Ir and Au, and is composed of a film having a face-centered cubic (f. c. c.) structure. The magnetic recording layer contains at least Co, Cr and Pt, and is composed of a film having a hexagonal close-packed (h. c. p.) structure. More preferably, a non-magnetic h. c. p. intermediate layer is provided between the non-magnetic intermediate layer and the magnetic recording layer.

摘要翻译： 公开了一种能够进行每1平方英寸50吉比特或更高的超高密度磁记录的大容量磁存储装置。 在具有顺序地形成非磁性中间层和磁记录层的垂直磁记录介质中，非磁性中间层由具有面心立方结构并包含除Pt以外的非磁性元素的层组成。 具体地说，中间层主要含有选自由Al，Cu，Rh，Pd，Ag，Ir和Au构成的元素组中的至少一种，并且由具有面心立方（c。c。）结构的膜组成。 磁记录层至少含有Co，Cr和Pt，并且由具有六方密堆积（h.p.P。）结构的膜组成。 更优选地，非磁性h。 C。 p。 中间层设置在非磁性中间层和磁记录层之间。

公开(公告)号：US06177208B1

公开(公告)日：2001-01-23

申请号：US09317852

申请日：1999-05-25

申请人： Tomoo Yamamoto ,  Nobuyuki Inaba ,  Masukazu Igarashi ,  Masaaki Futamoto ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Emi Mangyo ,  Kazusuke Yamanaka

发明人： Tomoo Yamamoto ,  Nobuyuki Inaba ,  Masukazu Igarashi ,  Masaaki Futamoto ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Emi Mangyo ,  Kazusuke Yamanaka

IPC分类号： G11B566

CPC分类号： B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/3903 ,  G11B5/656 ,  G11B5/82 ,  G11B2005/3996 ,  Y10S428/90

摘要： A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in reliability can be realized by making the magnetic layer of the magnetic recording medium from a mixture comprising at least one non-magnetic compound selected from the group consisting of oxides and nitrides and a magnetic material comprising Co and Pt as main components and specifying the molar ratio of Pt to Co in the magnetic layer, and employing a magnetoresistive read back magnetic recording head.

摘要翻译： 可以实现高S / N的磁记录系统和低误码率，能够执行至少1吉比特/ 1平方英寸的高记录密度的写入和读取以及可靠性高的磁记录系统。 来自包含选自氧化物和氮化物的至少一种非磁性化合物和包含Co和Pt作为主要成分的磁性材料并指定磁性层中Pt与Co的摩尔比的混合物的磁记录介质，并且使用 磁阻回读磁记录头。

公开(公告)号：US5919581A

公开(公告)日：1999-07-06

申请号：US670121

申请日：1996-06-25

申请人： Tomoo Yamamoto ,  Nobuyuki Inaba ,  Masukazu Igarashi ,  Masaaki Futamoto ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Emi Mangyo ,  Kazusuke Yamanaka

发明人： Tomoo Yamamoto ,  Nobuyuki Inaba ,  Masukazu Igarashi ,  Masaaki Futamoto ,  Yuzuru Hosoe ,  Ichiro Tamai ,  Emi Mangyo ,  Kazusuke Yamanaka

IPC分类号： G11B5/66 ,  G11B5/00 ,  G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/65 ,  G11B5/738 ,  G11B5/82 ,  G11B20/14 ,  G11B5/68 ,  G11B5/706

CPC分类号： B82Y10/00 ,  G11B5/00 ,  G11B5/3903 ,  G11B5/656 ,  G11B2005/3996 ,  G11B5/012 ,  G11B5/82 ,  Y10S428/90

摘要： A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in reliability can be realized by making the magnetic layer of the magnetic recording medium from a mixture comprising at least one non-magnetic compound selected from the group consisting of oxides and nitrides and a magnetic material comprising Co and Pt as main components and specifying the molar ratio of Pt to Co in the magnetic layer, and employing a magnetoresistive read back magnetic recording head.

摘要翻译： 可以实现高S / N的磁记录系统和低误码率，能够执行至少1吉比特/ 1平方英寸的高记录密度的写入和读取以及可靠性高的磁记录系统。 来自包含选自氧化物和氮化物的至少一种非磁性化合物和包含Co和Pt作为主要成分的磁性材料并指定磁性层中Pt与Co的摩尔比的混合物的磁记录介质，并且使用 磁阻回读磁记录头。

公开(公告)号：US07556871B2

公开(公告)日：2009-07-07

申请号：US11105045

申请日：2005-04-12

申请人： Takayuki Ichihara ,  Atsushi Nakamura ,  Ichiro Tamai ,  Yuzuru Hosoe

发明人： Takayuki Ichihara ,  Atsushi Nakamura ,  Ichiro Tamai ,  Yuzuru Hosoe

IPC分类号： G11B5/66

CPC分类号： G11B5/667 ,  G11B5/66 ,  G11B5/7325

摘要： Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpendicular magnetic recording medium has a soft-magnetic underlayer, and magnetic recording layers, and the magnetic recording layers comprises a first recording layer containing magnetic grains oriented in a direction normal to a medium plane, and a second recording layer containing magnetic grains tilted in a cross-track direction. There can be provided a perpendicular magnetic recording medium resistant to thermal fluctuation, small in medium noise, and excellent in write-ability.

摘要翻译： 本发明的实施方案提供了一种垂直磁记录介质，其能够调和高记录密度和高热稳定性，并且具有高的写入能力，同时保持高的磁各向异性能量。 在一个实施例中，垂直磁记录介质具有软磁性底层和磁记录层，并且磁记录层包括含有沿垂直于介质平面的方向取向的磁性颗粒的第一记录层和含有 磁性晶粒沿横向方向倾斜。 可以提供耐热波动，中等噪声小，写入性优异的垂直磁记录介质。

公开(公告)号：US20060088737A1

公开(公告)日：2006-04-27

申请号：US11258532

申请日：2005-10-24

申请人： Yoshiyuki Hirayama ,  Ikuko Takekuma ,  Ichiro Tamai

发明人： Yoshiyuki Hirayama ,  Ikuko Takekuma ,  Ichiro Tamai

IPC分类号： G11B5/65 ,  C23C14/00

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。

公开(公告)号：US20060057431A1

公开(公告)日：2006-03-16

申请号：US11227675

申请日：2005-09-14

申请人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

发明人： Ichiro Tamai ,  Ikuko Takekuma ,  Yoshiyuki Hirayama ,  Yuzuru Hosoe ,  Yoshinori Honda

IPC分类号： G11B5/66 ,  C23C14/00

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。