公开(公告)号：US20100277829A1

公开(公告)日：2010-11-04

申请号：US12810772

申请日：2008-12-24

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B21/02 ,  G11B5/84

CPC分类号： G11B5/855 ,  G11B5/66 ,  H01F41/34

摘要： A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on at least one surface of a nonmagnetic substrate, characterized by comprising a step of reacting portions of a magnetic layer, formed on the non-magnetic substrate, with ozone to modify magnetic properties of said portions of the magnetic layer for forming the magnetically partitioned magnetic recording pattern. The magnetic layer can be a two-layer structure comprising a magnetic layer having a granular structure and formed thereon a magnetic layer having a non-granular structure. The produced magnetic recording medium exhibits a greatly enhanced recording density while recording/reproducing characteristics equal to or better than those of the heretofore proposed magnetic recording mediums are maintained, and it can be produced with an enhanced efficiency.

摘要翻译： 一种在非磁性基板的至少一个表面上制造具有磁分区磁记录图案的磁记录介质的方法，其特征在于包括使形成在非磁性基板上的磁性层的部分与臭氧反应的步骤， 用于形成磁分区磁记录图案的磁性层的所述部分的磁特性。 磁性层可以是包括具有颗粒结构的磁性层的两层结构，并且在其上形成具有非粒状结构的磁性层。 所制造的磁记录介质表现出大大增强的记录密度，同时保持等于或优于以前提出的磁记录介质的记录/再现特性，并且可以以提高的效率生产。

公开(公告)号：US09064520B2

公开(公告)日：2015-06-23

申请号：US13478739

申请日：2012-05-23

申请人： Tetsuya Osaka ,  Atsushi Sugiyama ,  Takuma Hachisu ,  Tomoo Shige ,  Masato Fukushima ,  Akira Yamane ,  Akira Sakawaki

发明人： Tetsuya Osaka ,  Atsushi Sugiyama ,  Takuma Hachisu ,  Tomoo Shige ,  Masato Fukushima ,  Akira Yamane ,  Akira Sakawaki

IPC分类号： G11B5/706 ,  G11B5/82 ,  G11B5/73 ,  G11B5/66 ,  G11B5/65 ,  G11B5/84

CPC分类号： G11B5/7325 ,  G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/8404 ,  G11B5/855

摘要： According to the present invention, a magnetic recording medium is provided including a disk-shaped non-magnetic substrate and at least a perpendicular magnetic layer formed on the disk-shaped non-magnetic substrate, wherein the perpendicular magnetic layer has a structure in which an FePt or CoPt nanoparticle array is formed on a formation surface, on which a plurality of striations each having a circumferential directional component are formed, by a texturing treatment; a manufacturing method thereof; and a magnetic record/reproduction apparatus including the magnetic recording medium or a magnetic recording medium manufactured according to the manufacturing method.

摘要翻译： 根据本发明，提供一种磁记录介质，其包括盘状非磁性基板和至少形成在盘状非磁性基板上的垂直磁性层，其中垂直磁性层具有以下结构： FePt或CoPt纳米颗粒阵列形成在形成表面上，通过纹理处理形成多个具有圆周方向分量的条纹; 其制造方法; 以及包括根据制造方法制造的磁记录介质或磁记录介质的磁记录/再现设备。

公开(公告)号：US08394514B2

公开(公告)日：2013-03-12

申请号：US12745879

申请日：2008-11-28

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B5/64

CPC分类号： G11B5/855 ,  H01F41/34

摘要： A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on a surface of a nonmagnetic substrate, which comprises the following steps. Step (A) of forming a magnetic layer on a non-magnetic substrate, step (B) of forming a carbon layer on the magnetic layer, step (C) of forming a resist layer on the carbon layer, step (D) of forming a negative pattern of magnetic recording pattern on the resist layer, step (E) of removing the portions of resist layer and carbon layer in regions corresponding to the negative pattern, step (F) of removing at least a surface layer portion of the magnetic layer in the regions corresponding to the negative pattern, and optional step (G) of removing the residual resist layer and carbon layer. The produced magnetic recording medium has a recording/reproducing property equal to or better than conventional ones and exhibits a high recording density.

摘要翻译： 一种在非磁性基板的表面上制造具有磁分割磁记录图案的磁记录介质的方法，包括以下步骤。 在非磁性基板上形成磁性层的步骤（A），在磁性层上形成碳层的步骤（B），在碳层上形成抗蚀剂层的步骤（C），形成步骤（D） 抗蚀剂层上的磁记录图案的负图案，在除去负图案的区域中去除抗蚀剂层和碳层的部分的步骤（E），步骤（F）至少去除磁性层的表层部分 在对应于负图案的区域中，以及去除残留抗蚀剂层和碳层的任选步骤（G）。 所制造的磁记录介质具有等于或优于常规磁记录介质的记录/再现性能并且具有高记录密度。

公开(公告)号：US08336193B2

公开(公告)日：2012-12-25

申请号：US12671333

申请日：2008-07-24

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B5/865 ,  Y10T29/49025 ,  Y10T29/4903 ,  Y10T29/49032

摘要： Provided is a process for making a magnetic recording medium having a magnetically partitioned magnetic recording patterns, which comprises the following three steps (1), (2) and (3), conducted in this order: (1) a step of forming a magnetic layer on a non-magnetic substrate; (2) a step of removing surface layer portions of regions for magnetically partitioning the magnetic layer; and (3) a step of exposing the thus-exposed regions of the magnetic layer, from which the surface layer portions have been removed, to a reactive plasma or a reactive ion, to modify the magnetic characteristics of the regions of magnetic layer, whereby a magnetic recording pattern is formed which are magnetically partitioned by the regions of magnetic layer having the modified characteristics. Thus, a magnetic recording medium having an enhanced recording density and minimizing letter bleeding at writing can be made with a high efficiency.

摘要翻译： 提供了一种制造具有磁分区磁记录图案的磁记录介质的方法，其包括以下三个步骤（1），（2）和（3）：按照以下顺序进行：（1）形成磁性的步骤 层在非磁性基板上; （2）去除用于磁性分隔磁性层的区域的表面层部分的步骤; 和（3）将表面层部分已经被除去的磁性层的这样暴露的区域暴露于反应性等离子体或反应离子的步骤，以改变磁性层区域的磁特性，由此 形成磁记录图案，磁记录图案被具有改进特性的磁性层的区域磁分隔。 因此，可以高效率地进行具有增强的记录密度和最小化写入时的字母泄漏的磁记录介质。

公开(公告)号：US08551349B2

公开(公告)日：2013-10-08

申请号：US12810772

申请日：2008-12-24

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B5/84

CPC分类号： G11B5/855 ,  G11B5/66 ,  H01F41/34

摘要： A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on at least one surface of a nonmagnetic substrate, characterized by comprising a step of reacting portions of a magnetic layer, formed on the non-magnetic substrate, with ozone to modify magnetic properties of said portions of the magnetic layer for forming the magnetically partitioned magnetic recording pattern. The magnetic layer can be a two-layer structure comprising a magnetic layer having a granular structure and formed thereon a magnetic layer having a non-granular structure. The produced magnetic recording medium exhibits a greatly enhanced recording density while recording/reproducing characteristics equal to or better than those of the heretofore proposed magnetic recording mediums are maintained, and it can be produced with an enhanced efficiency.

摘要翻译： 一种在非磁性基板的至少一个表面上制造具有磁分区磁记录图案的磁记录介质的方法，其特征在于包括使形成在非磁性基板上的磁性层的部分与臭氧反应的步骤， 用于形成磁分区磁记录图案的磁性层的所述部分的磁特性。 磁性层可以是包括具有颗粒结构的磁性层的两层结构，并且在其上形成具有非粒状结构的磁性层。 所制造的磁记录介质表现出大大增强的记录密度，同时保持等于或优于以前提出的磁记录介质的记录/再现特性，并且可以以提高的效率制造。

公开(公告)号：US08486486B2

公开(公告)日：2013-07-16

申请号：US13276976

申请日：2011-10-19

申请人： Akira Yamane ,  Akira Sakawaki ,  Masato Fukushima

发明人： Akira Yamane ,  Akira Sakawaki ,  Masato Fukushima

IPC分类号： G11B5/66

CPC分类号： G11B5/855

摘要： A method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern is provided, in which the surface of a magnetic layer is not oxidized or halogenated, the surface is not contaminated with dust, and the manufacturing process is not complex. The method of manufacturing a magnetic recording medium having a magnetically separated magnetic recording pattern includes forming a magnetic layer on a nonmagnetic substrate, forming a mask layer made of carbon to form the magnetic recording pattern on the magnetic layer, forming cobalt carbide as a nonmagnetic material in the magnetic layer by irradiating a region of the magnetic layer not covered by the mask layer with ion beams including carbon hydride ions, and removing the mask layer in this order.

摘要翻译： 提供一种制造具有磁分离的磁记录图案的磁记录介质的方法，其中磁性层的表面不被氧化或卤化，表面不被灰尘污染，并且制造过程不复杂。 制造具有磁分离磁记录图案的磁记录介质的方法包括在非磁性基板上形成磁性层，形成由碳制成的掩模层，以在磁性层上形成磁记录图案，形成作为非磁性材料的碳化钴 在磁性层中，通过用包含碳氢化合物离子的离子束照射未被掩模层覆盖的磁性层的区域，并且依次去除掩模层。

公开(公告)号：US08315018B2

公开(公告)日：2012-11-20

申请号：US12918973

申请日：2009-02-16

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B20/10

CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/82

摘要： Disclosed is a method of manufacturing a magnetic recording medium capable of effectively and reliably removing foreign materials on the surface of a magnetic recording medium, preventing a mask layer from remaining on the surface of the magnetic recording medium, and forming the pattern of a magnetic layer with high productivity. The method of manufacturing a magnetic recording medium includes: a step of forming a magnetic layer on a non-magnetic substrate; a step of forming a mask layer on the magnetic layer; a step of patterning the mask layer to form a mask pattern; a step of forming a magnetic recording pattern on the magnetic layer using the mask pattern; a step of burnishing the surface of the mask pattern with an abrasive; and a step of removing the mask pattern.

摘要翻译： 公开了一种制造能够有效且可靠地去除磁记录介质表面上的异物的磁记录介质的方法，防止掩模层残留在磁记录介质的表面上，并形成磁层的图案 生产力高。 制造磁记录介质的方法包括：在非磁性基板上形成磁性层的步骤; 在所述磁性层上形成掩模层的步骤; 图案化掩模层以形成掩模图案的步骤; 使用掩模图案在磁性层上形成磁记录图案的步骤; 用研磨剂抛光掩模图案的表面的步骤; 以及去除掩模图案的步骤。

公开(公告)号：US20100271730A1

公开(公告)日：2010-10-28

申请号：US12745879

申请日：2008-11-28

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B21/02 ,  B05D5/12

CPC分类号： G11B5/855 ,  H01F41/34

摘要： A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on a surface of a nonmagnetic substrate, which comprises the following steps. Step (A) of forming a magnetic layer on a non-magnetic substrate, step (B) of forming a carbon layer on the magnetic layer, step (C) of forming a resist layer on the carbon layer, step (D) of forming a negative pattern of magnetic recording pattern on the resist layer, step (E) of removing the portions of resist layer and carbon layer in regions corresponding to the negative pattern, step (F) of removing at least a surface layer portion of the magnetic layer in the regions corresponding to the negative pattern, and optional step (G) of removing the residual resist layer and carbon layer. The produced magnetic recording medium has a recording/reproducing property equal to or better than conventional ones and exhibits a high recording density.

摘要翻译： 一种在非磁性基板的表面上制造具有磁分割磁记录图案的磁记录介质的方法，包括以下步骤。 在非磁性基板上形成磁性层的步骤（A），在磁性层上形成碳层的步骤（B），在碳层上形成抗蚀剂层的步骤（C），形成步骤（D） 抗蚀剂层上的磁记录图案的负图案，在除去负图案的区域中去除抗蚀剂层和碳层的部分的步骤（E），步骤（F）至少去除磁性层的表层部分 在对应于负图案的区域中，以及去除残留抗蚀剂层和碳层的任选步骤（G）。 所制造的磁记录介质具有等于或优于常规磁记录介质的记录/再现性能并且具有高的记录密度。

公开(公告)号：US20100232056A1

公开(公告)日：2010-09-16

申请号：US12679463

申请日：2008-09-22

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B5/596 ,  G11B5/84

CPC分类号： G11B5/855

摘要： Provided is a process for manufacturing a magnetic recording medium having a magnetically partitioned magnetic recording patterns, which comprises the following steps, conducted in the order: (1) step of forming a magnetic layer on a non-magnetic substrate, (2) step of exposing the surface of regions of the magnetic layer to a reactive plasma or a reactive ion, which regions are to magnetically partition the magnetic layer for forming a magnetically partitioned magnetic recording pattern, and (3) step of exposing the magnetically partitioned magnetic layer to an inert gas irradiation. Preferably, a step of removing surface layer portions of said regions of the magnetic layer is carried out after the step (1) but before the step (2). The surface of the magnetic layer of produced magnetic recording medium exhibits good resistance to corrosion caused by oxidation or halogenation.

摘要翻译： 本发明提供一种制造磁记录介质的方法，该磁记录介质具有以下顺序进行的以下步骤：（1）在非磁性基板上形成磁性层的步骤，（2）步骤 将磁性层的区域的表面暴露于反应性等离子体或反应离子，这些区域磁性分配磁性层以形成磁性分隔的磁记录图案，以及（3）将磁分离的磁性层暴露于 惰性气体照射。 优选地，在步骤（1）之后但在步骤（2）之前执行去除磁性层的所述区域的表面层部分的步骤。 所制造的磁记录介质的磁性层的表面表现出良好的耐氧化或卤化腐蚀性。

公开(公告)号：US20100232052A1

公开(公告)日：2010-09-16

申请号：US12671333

申请日：2008-07-24

申请人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

发明人： Masato Fukushima ,  Akira Sakawaki ,  Akira Yamane

IPC分类号： G11B21/02 ,  G11B5/84

CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B5/865 ,  Y10T29/49025 ,  Y10T29/4903 ,  Y10T29/49032

摘要： Provided is a process for making a magnetic recording medium having a magnetically partitioned magnetic recording patterns, which comprises the following three steps (1), (2) and (3), conducted in this order: (1) a step of forming a magnetic layer on a non-magnetic substrate; (2) a step of removing surface layer portions of regions for magnetically partitioning the magnetic layer; and (3) a step of exposing the thus-exposed regions of the magnetic layer, from which the surface layer portions have been removed, to a reactive plasma or a reactive ion, to modify the magnetic characteristics of the regions of magnetic layer, whereby a magnetic recording pattern is formed which are magnetically partitioned by the regions of magnetic layer having the modified characteristics. Thus, a magnetic recording medium having an enhanced recording density and minimizing letter bleeding at writing can be made with a high efficiency.

摘要翻译： 提供了一种制造具有磁分区磁记录图案的磁记录介质的方法，其包括以下三个步骤（1），（2）和（3）：按照以下顺序进行：（1）形成磁性的步骤 层在非磁性基板上; （2）去除用于磁性分隔磁性层的区域的表面层部分的步骤; 和（3）将表面层部分已经被除去的磁性层的这样暴露的区域暴露于反应性等离子体或反应离子的步骤，以改变磁性层的区域的磁特性，由此 形成磁记录图案，磁记录图案被具有改进特性的磁性层的区域磁分隔。 因此，可以高效率地进行具有增强的记录密度和最小化写入时的字母泄漏的磁记录介质。