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1. 发明申请

US20100215991A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM, PROCESS FOR PRODUCING PERPENDICULAR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING APPARATUS 审中-公开
标题翻译：全磁性记录介质，生产磁性记录介质的过程和磁记录/再现设备
公开(公告)号：US20100215991A1
公开(公告)日：2010-08-26
申请号：US12671452
申请日：2008-07-25
申请人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
发明人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
IPC分类号： G11B5/706 , G11B5/84
CPC分类号： G11B5/7325 , G11B5/82 , G11B5/851
摘要： A perpendicular magnetic recording medium is provided, which has a soft magnetic layer, a seed layer, a first intermediate layer, a second intermediate layer and a perpendicular magnetic recording layer, formed in this order on a non-magnetic substrate, and is characterized in that the seed layer is comprised of a (002) crystal plane-orientated hcp structure, the first intermediate layer is comprised of a (110) crystal plane-orientated bcc structure and the second intermediate layer is comprised of a (002) crystal plane-orientated hcp structure. The (110) crystal plane-orientated bcc structure comprises at least 60 atomic % of Cr. The magnetic recording medium has fine and well discrete magnetic crystal grains with extremely small size and exhibits good perpendicular orientation in the perpendicular magnetic recording layer, and thus, the medium is capable of recording and reproducing information with high density.
摘要翻译：提供了一种垂直磁记录介质，其具有在非磁性基板上依次形成的软磁性层，种子层，第一中间层，第二中间层和垂直磁记录层，其特征在于种子层由（002）晶面取向的hcp结构构成，第一中间层由（110）晶面定向的bcc结构构成，第二中间层由（002）晶面取向的hcp结构构成，定向hcp结构。（110）晶面取向的bcc结构包含至少60原子％的Cr。磁记录介质具有极小尺寸的精细且分散的磁晶粒，并且在垂直磁记录层中呈现出良好的垂直取向，因此该介质能够以高密度记录和再现信息。

2. 发明申请

US20110151280A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCING THE SAME, AND MAGNETIC RECORDING/REPRODUCING DEVICE 失效
标题翻译：全息磁记录介质，其制造方法和磁记录/再现装置
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。

3. 发明申请

US20110111257A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US20110111257A1
公开(公告)日：2011-05-12
申请号：US12674602
申请日：2008-08-25
申请人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
发明人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
IPC分类号： G11B5/33
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.
摘要翻译：提供了一种磁记录介质，其可以通过保持磁记录层的垂直取向来记录和再现高密度信息，即使随着磁性晶粒的晶粒尺寸的减小，非磁性层从中间层到种晶层的厚度减小与记录密度的增加一致。还提供了其制造方法和磁记录和再现装置。磁记录介质是至少包括下层，取向控制层，磁记录层和形成在非磁性基板上的保护层的垂直磁记录介质。这里，取向控制层包括两层以上的种子层和从基板侧的中间层。选择种子层和中间层的材料，使得中间层材料相对于无定形的种子层材料的接触角在10至100度的范围内。

4. 发明授权

US08512884B2 Perpendicular magnetic recording medium, method for producing the same, and magnetic recording/reproducing device 失效
标题翻译：垂直磁记录介质，其制造方法和磁记录/再现装置
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。

5. 发明授权

US08133601B2 Magnetic recording medium and magnetic recording and reproducing apparatus 有权
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US08133601B2
公开(公告)日：2012-03-13
申请号：US12674602
申请日：2008-08-25
申请人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
发明人： Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.
摘要翻译：提供了一种磁记录介质，其可以通过保持磁记录层的垂直取向来记录和再现高密度信息，即使随着磁性晶粒的晶粒尺寸的减小，非磁性层从中间层到种晶层的厚度减小与记录密度的增加一致。还提供了其制造方法和磁记录和再现装置。磁记录介质是至少包括下层，取向控制层，磁记录层和形成在非磁性基板上的保护层的垂直磁记录介质。这里，取向控制层包括两层以上的种子层和从基板侧的中间层。选择种子层和中间层的材料，使得中间层材料相对于无定形的种子层材料的接触角在10至100度的范围内。

6. 发明授权

US08367155B2 Manufacturing method of magnetic recording medium and magnetic recording/reproducing apparatus 失效
标题翻译：磁记录介质和磁记录/重放装置的制造方法
公开(公告)号：US08367155B2
公开(公告)日：2013-02-05
申请号：US12693779
申请日：2010-01-26
申请人： Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa
发明人： Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa
IPC分类号： G11B5/127
CPC分类号： G11B5/8404 , G11B5/667 , G11B5/82
摘要： There is provided a manufacturing method of a magnetic recording medium that maintains a high level of perpendicular orientation of a perpendicular magnetic layer and enables to further increase high recording density, prepared such that at least on a non-magnetic substrate, there are laminated a soft magnetic base layer, an orientation control layer 11 that controls the orientation of the layer immediately thereabove, and a perpendicular magnetic layer with a magnetization easy axis thereof primarily oriented perpendicular to the non-magnetic substrate. The manufacturing method is characterized in that when configuring the perpendicular magnetic layer with two or more magnetic layers 12 to 14 and crystal-growing each layer so that the crystal grains that constitute the respective magnetic layers 12 to 14, together with the crystal grains that constitute the orientation control layer 11, form column-shaped crystals S1 to S3 in a consecutive manner in the thickness direction, lamination of the orientation control layer 11 is performed while the substrate is being cooled or immediately after the substrate has been cooled.
摘要翻译：提供了一种磁记录介质的制造方法，其保持垂直磁性层的垂直取向的高水平，并且能够进一步提高高记录密度，其制备成至少在非磁性基板上层压软磁性基层，控制其上方的层的取向的取向控制层11和其易磁化轴的垂直磁性层主要垂直于非磁性基板取向。制造方法的特征在于，在构成具有2层以上的磁性层12〜14的垂直磁性层的情况下，使构成各磁性层12〜14的结晶粒与构成各磁性层12〜14的晶粒一起构成取向控制层11在厚度方向上连续形成柱状晶体S1〜S3，在进行冷却或基板冷却后立即进行取向控制层11的层叠。

7. 发明申请

US20100188772A1 METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：用于制造磁记录介质，磁记录介质和磁记录和再现装置的方法
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。

8. 发明授权

US08034471B2 Magnetic recording medium, method of manufacturing magnetic recording medium and magnetic recording reproducing apparatus 有权
标题翻译：磁记录介质，磁记录介质的制造方法和磁记录重放装置
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。

9. 发明授权

US08968526B2 Method for manufacturing magnetic recording medium, magnetic recording medium, and magnetic recording and reproducing apparatus 有权
标题翻译：磁记录介质的制造方法，磁记录介质以及磁记录再生装置
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。

10. 发明授权

US08034472B2 Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproducing apparatus 有权
标题翻译：磁记录介质及其制造方法以及磁记录/重放装置
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。

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