公开(公告)号：US20080124579A1

公开(公告)日：2008-05-29

申请号：US11983466

申请日：2007-11-09

申请人： Isatake Kaitsu ,  Ryosaku Inamura

发明人： Isatake Kaitsu ,  Ryosaku Inamura

IPC分类号： G11B5/33 ,  B05D5/12

CPC分类号： G11B5/82 ,  G11B5/667 ,  G11B2005/0029 ,  H01F10/132

摘要： A magnetic recording medium has high corrosion resistance and high Bs, a method of manufacturing the magnetic recording medium, and a magnetic recording device. The magnetic recording medium using as a recording layer a magnetic layer has perpendicular magnetic anisotropy. A soft magnetic backing layer (upper and lower soft magnetic backing layers) formed under the recording layer is composed of a FeCoZr alloy added with at least one element of Ta and Nb and further added with Cr. This magnetic recording medium includes the soft magnetic backing layer having high corrosion resistance and high Bs and therefore, exhibits high Hc recording and high S/N performance.

摘要翻译： 磁记录介质具有高耐蚀性和高Bs，制造磁记录介质的方法和磁记录装置。 使用磁记录层的磁记录介质具有垂直的磁各向异性。 形成在记录层下方的软磁性背衬层（上部和下部软磁性背衬层）由添加有Ta和Nb的至少一种元素的FeCoZr合金构成，并进一步添加Cr。 该磁记录介质包括具有高耐腐蚀性和高Bs的软磁背衬层，因此表现出高Hc记录和高S / N性能。

公开(公告)号：US20070230051A1

公开(公告)日：2007-10-04

申请号：US11474522

申请日：2006-06-26

申请人： Antony Ajan ,  Toshio Sugimoto ,  Ryosaku Inamura ,  Daiju Kaneko

发明人： Antony Ajan ,  Toshio Sugimoto ,  Ryosaku Inamura ,  Daiju Kaneko

IPC分类号： G11B5/74 ,  G11B5/66

CPC分类号： G11B5/855 ,  G11B5/66 ,  G11B5/667

摘要： A perpendicular magnetic recording medium is disclosed that is able to prevent the Wide Area Track Erasure phenomenon from occurring and is capable of high density recording. The perpendicular magnetic recording medium includes a substrate; a soft-magnetic backup stack structure including a first magnetic layer, a first non-magnetic coupling layer, and a second magnetic layer stacked on the substrate in order; an intermediate layer formed from a non-magnetic material on the soft-magnetic backup stacked structure; and a recording layer on the intermediate layer, the recording layer having an easy axis of magnetization perpendicular to the surface of the substrate. The first magnetic layer and the second magnetic layer are formed from a poly-crystal soft-magnetic material, each of the first magnetic layer and the second magnetic layer has an easy axis of magnetization in the surface thereof, and the magnetization of the first magnetic layer and the magnetization of the second magnetic layer are coupled and anti-parallel to each other.

摘要翻译： 公开了一种垂直磁记录介质，其能够防止发生广域轨迹擦除现象并能够进行高密度记录。 垂直磁记录介质包括基板; 包括顺序堆叠在所述基板上的第一磁性层，第一非磁性耦合层和第二磁性层的软磁备用堆叠结构; 在软磁备用堆叠结构上由非磁性材料形成的中间层; 以及在中间层上的记录层，记录层具有垂直于基板表面的易磁化磁化轴。 第一磁性层和第二磁性层由多晶软磁材料形成，第一磁性层和第二磁性层中的每一个在其表面上具有容易的磁化轴，并且第一磁性层 层，并且第二磁性层的磁化彼此耦合并且反平行。

公开(公告)号：US20060222901A1

公开(公告)日：2006-10-05

申请号：US11374424

申请日：2006-03-14

申请人： Ryosaku Inamura ,  Isatake Kaitsu ,  Takuya Uzumaki

发明人： Ryosaku Inamura ,  Isatake Kaitsu ,  Takuya Uzumaki

IPC分类号： G11B5/66

CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732 ,  G11B5/7325

摘要： A magnetic recording medium includes; a base member; an underlayer formed on the base member; a main recording layer formed on the underlayer, and a writing assist layer formed on or under the main recording layer in contact with the main recording layer. The main recording layer has perpendicular magnetic anisotropy with an anisotropic magnetic field of Hk1 and an inclination of a reversal part of a magnetization curve of a1. The writing assist layer has an anisotropic magnetic field of Hk2 and an inclination of a reversal part of a magnetization curve of a2. The anisotropic magnetic fields Hk1 and Hk2 and the inclinations a1 and a2 satisfy Hk1>Hk2 and a2>a1.

摘要翻译： 磁记录介质包括： 基地会员 形成在所述基底构件上的底层; 形成在底层上的主记录层，以及形成在与主记录层接触的主记录层上或下面的书写辅助层。 主记录层具有垂直磁各向异性，其各向异性磁场为H＆gt; k1＆lt; 1＆lt; 1＆gt;的磁化曲线的反转部分的倾斜度。 写辅助层具有H＆gt; k2＆gt;的各向异性磁场和2 的磁化曲线的反转部分的倾斜度。 各向异性磁场H k1和H k2以及倾斜a 1和2 2都满足H < k1 H＆lt; k2＆gt;和＆lt; 2＆lt; / SUB＆gt; 1＆lt; 1＆lt; 1＆gt ;.

公开(公告)号：US20060199043A1

公开(公告)日：2006-09-07

申请号：US11388991

申请日：2006-03-24

申请人： Toshio Sugimoto ,  Ryosaku Inamura ,  Atsushi Tanaka

发明人： Toshio Sugimoto ,  Ryosaku Inamura ,  Atsushi Tanaka

IPC分类号： G11B5/66 ,  B05D5/12

CPC分类号： G11B5/667 ,  G11B5/7325

摘要： A perpendicular magnetic recording medium includes a substrate and has a construction to stack consecutively on the substrate, a soft-magnetic backing layer, a seed layer, a magnetic flux slit layer, a non-magnetic intermediate layer, a recording layer, a protective layer, and a lubricating layer, wherein the magnetic flux slit layer 13 includes soft-magnetic particles of generally columnar structure having a boundary part of a non-magnetic part and constricts the magnetic flux from the recording head only to the part where the soft-magnetic particle is provided and suppresses thereby spreading of the magnetic flux. Further, a perpendicular magnetic recording medium carrying a magnetic flux slit layer over the recording layer is disposed.

摘要翻译： 垂直磁记录介质包括基板并具有在基板上连续堆叠的结构，软磁背衬层，种子层，磁通狭缝层，非磁性中间层，记录层，保护层 和润滑层，其中，磁通量狭缝层13包括具有非磁性部分的边界部分的通常为柱状结构的软磁性颗粒，并将来自记录头的磁通量仅限于软磁性部分 提供颗粒并由此抑制磁通量的扩散。 此外，设置在记录层上承载磁通量狭缝层的垂直磁记录介质。

公开(公告)号：US07871718B2

公开(公告)日：2011-01-18

申请号：US12403215

申请日：2009-03-12

申请人： Ryosaku Inamura ,  Yuta Toyoda

发明人： Ryosaku Inamura ,  Yuta Toyoda

IPC分类号： G11B5/66

CPC分类号： G11B5/732 ,  B82Y10/00 ,  G11B5/66 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82

摘要： A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer includes a first seed layer made of an amorphous material, and a second seed layer provided between the first seed layer and the nonmagnetic intermediate layer and made of a material having a fcc structure. The amorphous material includes at least one element selected from a group consisting of Ta, W, Nb, Mo, Zr and alloys thereof which include at least one of Ta, W, Nb, Mo and Zr as a main component exceeding 50 at. %.

摘要翻译： 垂直磁记录介质包括非磁性种子层，设置在非磁性种子层上的非磁性中间层和设置在非磁性中间层上的垂直记录层。 非磁性种子层包括由非晶材料制成的第一籽晶层和设置在第一种子层和非磁性中间层之间并由具有fcc结构的材料制成的第二籽晶层。 无定形材料包括选自Ta，W，Nb，Mo，Zr及其合金中的至少一种元素，其包括作为主要成分的Ta，W，Nb，Mo和Zr中的至少一种超过50at。 ％。

公开(公告)号：US07824785B2

公开(公告)日：2010-11-02

申请号：US12403236

申请日：2009-03-12

申请人： Ryosaku Inamura ,  Yuta Toyoda

发明人： Ryosaku Inamura ,  Yuta Toyoda

IPC分类号： G11B5/66

CPC分类号： G11B5/732 ,  G11B5/66 ,  G11B5/82

摘要： A perpendicular magnetic recording medium includes a nonmagnetic seed layer, a nonmagnetic intermediate layer provided on the nonmagnetic seed layer, and a perpendicular recording layer provided on the nonmagnetic intermediate layer. The nonmagnetic seed layer includes a first seed layer made of a Ni alloy having a fcc structure, and a second seed layer provided between the first seed layer and the nonmagnetic intermediate layer and made of a Ni alloy having a fcc structure. A content of one or more elements other than Ni within the Ni alloy forming the second seed layer and having a Goldschmidt radius greater than that of Ni is larger than a content of one or more elements other than Ni within the Ni alloy forming the first seed layer and having a Goldschmidt radius greater than that of Ni.

摘要翻译： 垂直磁记录介质包括非磁性种子层，设置在非磁性种子层上的非磁性中间层和设置在非磁性中间层上的垂直记录层。 非磁性种子层包括由具有fcc结构的Ni合金制成的第一籽晶层和设置在第一种子层和非磁性中间层之间并由具有fcc结构的Ni合金制成的第二籽晶层。 形成第二晶种层的Ni合金中除了Ni之外的一种或多种元素，并且具有大于Ni的Goldschmidt半径的Ni的含量大于形成第一种子的Ni合金内的Ni以外的一种或多种元素的含量 并且具有大于Ni的Goldschmidt半径。

公开(公告)号：US20080285177A1

公开(公告)日：2008-11-20

申请号：US12105965

申请日：2008-04-18

申请人： Ryosaku Inamura ,  Isatake Kaitsu ,  Takuya Uzumaki ,  Iwao OKamoto ,  Akira Kikuchi

发明人： Ryosaku Inamura ,  Isatake Kaitsu ,  Takuya Uzumaki ,  Iwao OKamoto ,  Akira Kikuchi

IPC分类号： G11B5/33

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66

摘要： According to an aspect of an embodiment, a magnetic recording medium includes a substrate, and a first granular layer formed over the substrate, the first granular layer having a plurality of first magnetic particles and Si oxide separating the plurality of first magnetic particles. The magnetic recording medium further includes a second granular layer formed over the first granular layer, the second granular layer having a plurality of second magnetic particles and Ti oxide separating the plurality of second magnetic particles.

摘要翻译： 根据实施例的一个方面，磁记录介质包括基板和形成在基板上的第一颗粒层，第一颗粒层具有多个第一磁性颗粒和分离多个第一磁性颗粒的氧化硅。 磁记录介质还包括形成在第一颗粒层上的第二颗粒层，第二颗粒层具有多个第二磁性颗粒和分离多个第二磁性颗粒的Ti氧化物。

公开(公告)号：US20080075979A1

公开(公告)日：2008-03-27

申请号：US11900888

申请日：2007-09-13

申请人： Ryosaku Inamura ,  Isatake Kaitsu

发明人： Ryosaku Inamura ,  Isatake Kaitsu

IPC分类号： G11B5/66 ,  B05D5/12

CPC分类号： G11B5/667 ,  G11B5/66 ,  G11B5/7379

摘要： An under layer, a FeCoB seed layer, a crystalline orientation control layer having an fcc structure, a non-magnetic underlying layer, a first recording layer, a second recording layer, and a protective layer are formed on a substrate. The under layer includes three layers: a first soft magnetic layer, a non-magnetic spacer layer, and a second soft magnetic layer. The first recording layer has a granular structure in which magnetic particles are dispersed in a non-magnetic material, and the second recording layer has a non-granular structure.

摘要翻译： 在基板上形成底层，FeCoB种子层，具有fcc结构的结晶取向控制层，非磁性下层，第一记录层，第二记录层和保护层。 底层包括三层：第一软磁层，非磁性间隔层和第二软磁层。 第一记录层具有其中磁性颗粒分散在非磁性材料中的颗粒结构，并且第二记录层具有非颗粒结构。

公开(公告)号：US20050196649A1

公开(公告)日：2005-09-08

申请号：US11091937

申请日：2005-03-28

申请人： Ryosaku Inamura ,  Hiroto Takeshita ,  Toshio Sugimoto ,  Kazumasa Shimoda ,  Takenori Oshima ,  Maki Maeda ,  Takuya Uzumaki ,  Atsushi Tanaka

发明人： Ryosaku Inamura ,  Hiroto Takeshita ,  Toshio Sugimoto ,  Kazumasa Shimoda ,  Takenori Oshima ,  Maki Maeda ,  Takuya Uzumaki ,  Atsushi Tanaka

IPC分类号： B32B1/00 ,  G11B5/64 ,  G11B5/65 ,  G11B5/667 ,  G11B5/73

CPC分类号： B32B1/00 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325

摘要： A perpendicular magnetic recording medium includes a magnetic orientation controller layer serving as a layer for controlling crystalline orientation in an upper layer. A non-magnetic orientation controller layer extends on the surface of the magnetic orientation controller layer The non-magnetic orientation controller layer serves as a layer for controlling crystalline orientation in an upper layer. A magnetic recording layer extends on the surface of the non-magnetic orientation controller layer. The perpendicular magnetic recording medium allows a reliable establishment of a uniform crystalline orientation in the magnetic recording layer based on the influences from the magnetic and non-magnetic orientation controller layers. A reliable establishment of a uniform crystalline orientation can be achieved without an increase in the thickness of the non-magnetic orientation controller layer.

摘要翻译： 垂直磁记录介质包括用作控制上层结晶取向层的磁性取向控制层。 非磁性取向控制层在磁性取向控制层的表面上延伸。非磁性取向控制层用作控制上层结晶取向的层。 磁记录层在非磁性取向控制层的表面上延伸。 垂直磁记录介质基于来自磁和非磁性取向控制层的影响，允许在磁记录层中可靠地建立均匀的晶体取向。 可以在不增加非磁性取向控制层的厚度的情况下实现均匀结晶取向的可靠建立。