公开(公告)号：US20100188772A1

公开(公告)日：2010-07-29

申请号：US12692354

申请日：2010-01-22

申请人： Shingo Sasaki ,  Shin Saito ,  Migaku Takahashi ,  Atsushi Hashimoto ,  Yuzo Sasaki ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shingo Sasaki ,  Shin Saito ,  Migaku Takahashi ,  Atsushi Hashimoto ,  Yuzo Sasaki ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： G11B21/02 ,  C23C14/34 ,  G11B5/66

CPC分类号： G11B5/851 ,  C23C14/14 ,  C23C14/34 ,  G11B5/65 ,  G11B5/82 ,  Y02T50/67

摘要： There are provided a method for manufacturing a magnetic recording medium which is excellent in terms of both the recording and reproduction characteristics and the thermal fluctuation characteristics without reducing the density and hardness of the perpendicular magnetic layer; a magnetic recording medium; and a magnetic recording and reproducing apparatus with which an excellent recording density is achieved,wherein, in the method for manufacturing the magnetic recording medium,at least a portion of the perpendicular magnetic layer 4 is formed as a magnetic layer having a granular structure that contains Co as a major component and also contains an oxide of at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg;a target for forming the perpendicular magnetic layer 4 by the sputtering process is prepared so as to include an oxide of Co and a compound of Co and at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg, and to make the proportion of oxygen contained in the target higher than the proportion of oxygen contained in the perpendicular magnetic layer 4; anda sputtering gas pressure at the time of forming the perpendicular magnetic layer is set to 1 Pa or less.

摘要翻译： 提供了一种在不降低垂直磁性层的密度和硬度的情况下，在记录和再现特性以及热波动特性方面优异的磁记录介质的制造方法; 磁记录介质; 以及实现了良好的记录密度的磁记录和重放装置，其中在磁记录介质的制造方法中，垂直磁性层4的至少一部分形成为具有粒状结构的磁性层， Co作为主要成分，还含有选自Cr，Si，Ta，Al，Ti，W和Mg中的至少一种非磁性金属的氧化物; 制备通过溅射法形成垂直磁性层4的目标，以便包括Co的氧化物和Co的化合物和选自Cr，Si，Ta，Al，Ti的至少一种非磁性金属， W和Mg，并使靶中含有的氧的比例高于垂直磁性层4中所含的氧的比例; 在形成垂直磁性层时的溅射气体压力设定为1Pa以下。

公开(公告)号：US08968526B2

公开(公告)日：2015-03-03

申请号：US12692354

申请日：2010-01-22

申请人： Shingo Sasaki ,  Shin Saito ,  Migaku Takahashi ,  Atsushi Hashimoto ,  Yuzo Sasaki ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shingo Sasaki ,  Shin Saito ,  Migaku Takahashi ,  Atsushi Hashimoto ,  Yuzo Sasaki ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： C23C14/34 ,  G11B5/851 ,  C23C14/14 ,  G11B5/65 ,  G11B5/82

CPC分类号： G11B5/851 ,  C23C14/14 ,  C23C14/34 ,  G11B5/65 ,  G11B5/82 ,  Y02T50/67

摘要： There are provided a method for manufacturing a magnetic recording medium which is excellent in terms of both the recording and reproduction characteristics and the thermal fluctuation characteristics without reducing the density and hardness of the perpendicular magnetic layer; a magnetic recording medium; and a magnetic recording and reproducing apparatus with which an excellent recording density is achieved, wherein, in the method for manufacturing the magnetic recording medium, at least a portion of the perpendicular magnetic layer 4 is formed as a magnetic layer having a granular structure that contains Co as a major component and also contains an oxide of at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg; a target for forming the perpendicular magnetic layer 4 by the sputtering process is prepared so as to include an oxide of Co and a compound of Co and at least one nonmagnetic metal selected from the group consisting of Cr, Si, Ta, Al, Ti, W and Mg, and to make the proportion of oxygen contained in the target higher than the proportion of oxygen contained in the perpendicular magnetic layer 4; and a sputtering gas pressure at the time of forming the perpendicular magnetic layer is set to 1 Pa or less.

摘要翻译： 提供了一种在不降低垂直磁性层的密度和硬度的情况下，在记录和再现特性以及热波动特性方面优异的磁记录介质的制造方法; 磁记录介质; 以及实现了良好的记录密度的磁记录和重放装置，其中在磁记录介质的制造方法中，垂直磁性层4的至少一部分形成为具有粒状结构的磁性层， Co作为主要成分，还含有选自Cr，Si，Ta，Al，Ti，W和Mg中的至少一种非磁性金属的氧化物; 制备通过溅射法形成垂直磁性层4的目标，以便包括Co的氧化物和Co的化合物和选自Cr，Si，Ta，Al，Ti的至少一种非磁性金属， W和Mg，并使靶中含有的氧的比例高于垂直磁性层4中所含的氧的比例; 在形成垂直磁性层时的溅射气体压力设定为1Pa以下。

公开(公告)号：US08034471B2

公开(公告)日：2011-10-11

申请号：US12536225

申请日：2009-08-05

申请人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： G11B5/66

CPC分类号： G11B5/82 ,  G11B5/65 ,  G11B5/667 ,  G11B5/732

摘要： In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer has a laminated structure of two or more layers including an intermediate layer and a seed layer which is disposed closer to the non-magnetic substrate than the intermediate layer. The seed layer includes two or more kinds of elements having a face-centered cubic structure, has face-centered cubic (111) plane crystals oriented in a direction perpendicular to a substrate surface, and has a pseudo-hexagonal structure.

摘要翻译： 在从底部起依次形成至少软磁性底层，取向控制层，磁记录层和保护层的垂直磁记录介质中，取向控制层具有层叠结构 包括比中间层更靠近非磁性基板设置的中间层和种子层的两层以上的层。 种子层包括具有面心立方结构的两种或更多种元件，具有在垂直于衬底表面的方向上取向的面心立方（111）面晶体，并且具有假六边形结构。

公开(公告)号：US20110151280A1

公开(公告)日：2011-06-23

申请号：US12675090

申请日：2008-08-28

申请人： Migaku Takahashi ,  Shin Saito ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Atsushi Hashimoto ,  Akihiko Takeo ,  Tomoyuki Maeda

发明人： Migaku Takahashi ,  Shin Saito ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Atsushi Hashimoto ,  Akihiko Takeo ,  Tomoyuki Maeda

IPC分类号： G11B5/66 ,  G11B5/127 ,  C23C14/34 ,  C30B23/02

CPC分类号： G11B5/732 ,  G11B5/7325 ,  G11B5/8404 ,  G11B5/851

摘要： A perpendicular magnetic recording medium including at least a soft under layer, an orientation control layer, a magnetic recording layer and a protective layer on a non-magnetic substrate, wherein the orientation control layer is composed of three or more layers including a seed layer, a first intermediate layer and a second intermediate layer sequentially, formed in that order from the substrate side, the crystal grains that constitute the first intermediate layer are epitaxially grown on the crystal grains of the seed layer, the crystal grains that constitute the second intermediate layer are epitaxially grown on the crystal grains of the first intermediate layer, and the crystal grains that constitute the second intermediate layer are finer than the crystal grains that constitute the first intermediate layer.

摘要翻译： 一种在非磁性基板上至少含有软底层，取向控制层，磁记录层和保护层的垂直磁记录介质，其中所述取向控制层由三层或更多层构成，包括种子层， 从衬底侧依次形成第一中间层和第二中间层，构成第一中间层的晶粒在籽晶层的晶粒上外延生长，构成第二中间层的晶粒 在第一中间层的晶粒上外延生长，构成第二中间层的晶粒比构成第一中间层的晶粒更细。

公开(公告)号：US08512884B2

公开(公告)日：2013-08-20

申请号：US12675090

申请日：2008-08-28

申请人： Migaku Takahashi ,  Shin Saito ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Atsushi Hashimoto ,  Akihiko Takeo ,  Tomoyuki Maeda

发明人： Migaku Takahashi ,  Shin Saito ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Atsushi Hashimoto ,  Akihiko Takeo ,  Tomoyuki Maeda

IPC分类号： G11B5/66

CPC分类号： G11B5/732 ,  G11B5/7325 ,  G11B5/8404 ,  G11B5/851

摘要： A perpendicular magnetic recording medium including at least a soft under layer, an orientation control layer, a magnetic recording layer and a protective layer on a non-magnetic substrate, wherein the orientation control layer is composed of three or more layers including a seed layer, a first intermediate layer and a second intermediate layer sequentially, formed in that order from the substrate side, the crystal grains that constitute the first intermediate layer are epitaxially grown on the crystal grains of the seed layer, the crystal grains that constitute the second intermediate layer are epitaxially grown on the crystal grains of the first intermediate layer, and the crystal grains that constitute the second intermediate layer are finer than the crystal grains that constitute the first intermediate layer.

摘要翻译： 一种在非磁性基板上至少含有软底层，取向控制层，磁记录层和保护层的垂直磁记录介质，其中所述取向控制层由三层或更多层构成，包括种子层， 从衬底侧依次形成第一中间层和第二中间层，构成第一中间层的晶粒在籽晶层的晶粒上外延生长，构成第二中间层的晶粒 在第一中间层的晶粒上外延生长，构成第二中间层的晶粒比构成第一中间层的晶粒更细。

公开(公告)号：US08034472B2

公开(公告)日：2011-10-11

申请号：US12542372

申请日：2009-08-17

申请人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shinichi Ishibashi ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： G11B5/66

CPC分类号： G11B5/732 ,  B82Y25/00 ,  B82Y40/00 ,  G11B5/65 ,  G11B5/667 ,  H01F10/3272 ,  H01F41/306

摘要： The present invention provides a magnetic recording medium which is capable of improving the perpendicular orientation of a perpendicular magnetic recording layer while maintaining a writing performance during recording and obtaining both an improvement in the perpendicular orientation and fine magnetic crystal particles with a uniform diameter, and which enables information to be recorded or reproduced at high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A magnetic recording medium 10 according to the present invention includes at least a soft magnetic underlayer 2, an orientation control layer 3, a magnetic recording layer 4, and a protective layer 5 formed on a non-magnetic substrate 1. The orientation control layer 3 has a seed layer 6 and an intermediate layer 7. The seed layer 6 is made of a Cu—Ti alloy that has a face-centered cubic structure and includes Cu as a main component. The Cu—Ti alloy has a (111) crystal plane oriented substantially perpendicular to the surface of the non-magnetic substrate 1 and has a pseudo-hexagonal structure.

摘要翻译： 本发明提供一种磁记录介质，其能够在记录期间保持写入性能并且获得具有均匀直径的垂直取向和精细磁性结晶颗粒的改善的同时改善垂直磁记录层的垂直取向，并且其中 能够以高密度记录或再现信息，其制造方法和磁记录/再现装置。 根据本发明的磁记录介质10至少包括形成在非磁性基板1上的软磁性底层2，取向控制层3，磁记录层4和保护层5.取向控制层3 具有种子层6和中间层7.种子层6由具有面心立方结构并且包括Cu作为主要成分的Cu-Ti合金制成。 Cu-Ti合金具有大致垂直于非磁性基板1的表面定向的（111）晶面，并且具有假六边形结构。

公开(公告)号：US20100033873A1

公开(公告)日：2010-02-11

申请号：US12536225

申请日：2009-08-05

申请人： Shinichi ISHIBASHI ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

发明人： Shinichi ISHIBASHI ,  Migaku Takahashi ,  Shin Saito ,  Yuzo Sasaki ,  Atsushi Hashimoto ,  Gohei Kurokawa ,  Tomoyuki Maeda ,  Akihiko Takeo

IPC分类号： G11B5/667 ,  G11B5/84 ,  G11B5/82

CPC分类号： G11B5/82 ,  G11B5/65 ,  G11B5/667 ,  G11B5/732

摘要： In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer has a laminated structure of two or more layers including an intermediate layer and a seed layer which is disposed closer to the non-magnetic substrate than the intermediate layer. The seed layer includes two or more kinds of elements having a face-centered cubic structure, has face-centered cubic (111) plane crystals oriented in a direction perpendicular to a substrate surface, and has a pseudo-hexagonal structure.

摘要翻译： 在从底部起依次形成至少软磁性底层，取向控制层，磁记录层和保护层的垂直磁记录介质中，取向控制层具有层叠结构 包括比中间层更靠近非磁性基板设置的中间层和种子层的两层以上的层。 种子层包括具有面心立方结构的两种或更多种元件，具有在垂直于衬底表面的方向上取向的面心立方（111）面晶体，并且具有假六边形结构。

公开(公告)号：US20100165510A1

公开(公告)日：2010-07-01

申请号：US12601372

申请日：2008-05-21

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/82

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66 ,  G11B5/7379

摘要： A magnetic recording medium comprising a substrate, at least one soft magnetic underlayer formed on the substrate, a perpendicular magnetic recording layer formed on the soft magnetic underlayer, and a protective layer formed on the perpendicular magnetic recording layer, is provided wherein the perpendicular magnetic recording layer is comprised of a primary recording layer, a non-magnetic intermediate layer and an auxiliary layer; the primary recording layer comprises magnetic crystal grains and grain boundary portions surrounding the magnetic crystal grains, and has a perpendicular magnetic anisotropy; the auxiliary layer has a negative magneto crystalline anisotropy; and the non-magnetic intermediate layer is formed between the primary recording layer and the auxiliary layer and comprises at least one metal selected from Ru, Rh and Ir, or at least one alloy thereof. This magnetic recording medium exhibits high heat resistance and good recording/reproducing characteristics, and enables a high recording density.

摘要翻译： 一种磁记录介质，其特征在于，包括基板，形成在基板上的至少一个软磁性底层，形成在软磁性底层上的垂直磁记录层和形成在垂直磁记录层上的保护层，其中垂直磁记录 层由主记录层，非磁性中间层和辅助层构成; 主记录层包括磁晶粒和围绕磁晶粒的晶界部分，并且具有垂直的磁各向异性; 辅助层具有负磁结晶各向异性; 并且非磁性中间层形成在初级记录层和辅助层之间，并且包含至少一种选自Ru，Rh和Ir的金属，或其至少一种合金。 该磁记录介质具有高的耐热性和良好的记录/再现特性，并且能够实现高的记录密度。

公开(公告)号：US20090147401A1

公开(公告)日：2009-06-11

申请号：US12300073

申请日：2007-05-05

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： G11B5/667 ,  G11B5/7325

摘要： The present invention provides a magnetic recording medium capable of recording or reproducing high-density information by reducing the grain size of a perpendicular magnetic recording layer and improving vertical orientation, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. The perpendicular magnetic recording medium includes: a non-magnetic substrate; and at least an soft magnetic layer, an under layer, an intermediate layer, and a perpendicular magnetic recording film that are formed on the non-magnetic substrate. At least one layer of the intermediate layer is made of an alloy material of an element having an fcc structure and an element having a bcc structure or an hcp structure, and has both a crystal structure having (111) orientation and an irregular layer lattice (stacking fault) caused by a mixture of the fcc structure and the bcc structure. The at least one layer of the intermediate layer is made of an alloy material of at least one element that is selected from a group composed of Pt, Ir, Pd, Au, Ni, and Co, which is a main ingredient, and has the fcc structure, and an element having the bcc structure or the hcp structure.

摘要翻译： 本发明提供一种能够通过减小垂直磁记录层的晶粒尺寸并提高垂直取向来记录或再现高密度信息的磁记录介质，其制造方法和磁记录/再现装置。 垂直磁记录介质包括：非磁性基板; 以及形成在非磁性基板上的至少软磁性层，下层，中间层和垂直磁记录膜。 中间层的至少一层由具有fcc结构的元素和具有bcc结构或hcp结构的元素的合金材料制成，并且具有具有（111）取向的晶体结构和不规则层晶格（ 堆叠故障）由fcc结构和bcc结构的混合引起。 中间层的至少一层由选自由作为主要成分的Pt，Ir，Pd，Au，Ni和Co组成的组中的至少一种元素的合金材料制成，并且具有 fcc结构，以及具有bcc结构或hcp结构的元素。

公开(公告)号：US08012613B2

公开(公告)日：2011-09-06

申请号：US12663350

申请日：2008-06-06

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/66

CPC分类号： G11B5/732 ,  Y10T428/11

摘要： A magnetic recording medium is provided, which has at least one soft magnetic layer, at least one seed layer, at least one underlayer and at least one perpendicular magnetic recording layer, and is characterized in that the or each seed layer is comprised of a covalently bonded material. The covalently bonded material preferably predominantly comprises a nitride having a hexagonal crystal structure, more preferably, predominantly comprises aluminum nitride having a hexagonal wurtzite crystal structure. This magnetic recording medium is superior in recording and reproducing an information with high density.

摘要翻译： 提供了一种磁记录介质，其具有至少一个软磁层，至少一个种子层，至少一个底层和至少一个垂直磁记录层，其特征在于该或每个种子层由共价 粘合材料。 共价键合的材料优选主要包含具有六方晶系结构的氮化物，更优选主要包含具有六方纤锌矿晶体结构的氮化铝。 这种磁记录介质在高密度记录和再现信息方面是优越的。