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1. 发明授权

US4835068A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4835068A
公开(公告)日：1989-05-30
申请号：US113380
申请日：1987-10-27
申请人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
发明人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
IPC分类号： G11B5/66 , C08L67/02 , G11B5/64 , G11B5/706 , G11B5/73 , G11B5/851
CPC分类号： G11B5/65 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium comprises a non-magnetic substrate and a magnetic film which is formed on the non-magnetic substrate and the major component of which is iron nitride-oxide.
摘要翻译：磁记录介质包括非磁性基板和形成在非磁性基板上的磁性膜，其主要成分是氧化铁 - 氧化物。

2. 发明授权

US4713262A Manufacturing method for a magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4713262A
公开(公告)日：1987-12-15
申请号：US914513
申请日：1986-10-02
申请人： Tadashi Yasunaga , Ryuji Shirahata
发明人： Tadashi Yasunaga , Ryuji Shirahata
IPC分类号： G11B5/85 , H01F10/02
CPC分类号： G11B5/85
摘要： A method for manufacturing a magnetic recording medium, comprising evaporating a magnetic metal material from an evaporation source to form a vapor stream of the magnetic metal material, vapor-depositing the magnetic metal material on a tape-shaped substrate moving along a cooling can such that the incident angle (.theta.) of the vapor stream which is incident upon the substrate changes continuously from a high incident angle (.theta.max) to a low incident angle (.theta.min), and at the same time introducing one or more gases selected from the group consisting of a rare gas, CO.sub.2 gas, N.sub.2 gas, and nitrogen oxide gas, or a mixed gas composed of oxygen gas and one or more gases selected from the group consisting of a rare gas, CO.sub.2 gas, N.sub.2 gas and nitrogen oxide gas from a gas inlet part disposed at a position in the vicinity of the substrate and near the vapor stream at a low incident angle (.theta.min) upon the substrate, thereby providing a ferromagnetic metal film on the substrate.
摘要翻译：一种制造磁记录介质的方法，包括从蒸发源蒸发磁性金属材料以形成磁性金属材料的蒸汽流，将磁性金属材料气化沉积在沿冷却罐移动的带状基底上，使得入射到衬底上的蒸气流的入射角（θ）从高入射角（θmax）连续变化到低入射角（θmin），并且同时引入一个或多个选自或者由稀有气体，二氧化碳气体，氮气和氮氧化物气体组成的组，或由氧气和选自稀有气体，二氧化碳气体，氮气和氮氧化物气体中的一种或多种气体构成的混合气体从设置在基板附近的位置处的气体入口部分以及在基板上的低入射角（θmin）附近的蒸气流，从而在基板上提供强磁性金属膜。

3. 发明授权

US4885189A Method of producing magnetic recording media 失效
标题翻译：制作磁记录介质的方法
公开(公告)号：US4885189A
公开(公告)日：1989-12-05
申请号：US110820
申请日：1987-10-21
申请人： Tadashi Yasunaga , Ryuji Shirahata
发明人： Tadashi Yasunaga , Ryuji Shirahata
IPC分类号： G11B5/85
CPC分类号： G11B5/85
摘要： A method for producing a magnetic recording medium, comprising the steps of: (1) preparing a takeup evaporated article under a takeup tension of 13.5.times.10.sup.-8 b/t Kg-weight or more when a magnetic metal/alloy thin film is provided on a flexible substrate that is b mm wide and t m thick by takeup evaporation; (2) rewinding said evaporated article under a takup tension of 13.5.times.10.sup.-8 b/t Kg-weight or less; and (3) preserving said rewound article in an oxidation accelerating atmosphere. A method for producing a magnetic recording medium comprising the steps of: (1) preparing a takeup evaporated article by providing a magnetic metal/alloy thin film on a flexible substrate by takeup evaporation and (2) preserving said takeup evaporated article under the condition that an air stream containing an oxidizing gas is generated in winding gaps of said evaporated article.
摘要翻译：一种制造磁记录介质的方法，包括以下步骤：（1）在磁性金属/合金薄膜上设置磁性金属/合金薄膜时，以13.5×10 -8 b / t Kg-重量以上的卷取张力制备卷取蒸发制品通过卷取蒸发而宽度为bmm和厚度tm的柔性基板; （2）在13.5×10 -8 b / t Kg-重量或更小的抽吸张力下将所述蒸发制品倒卷; 和（3）在氧化加速气氛中保存所述重绕物品。一种制造磁记录介质的方法，包括以下步骤：（1）通过卷取蒸发在柔性基板上提供磁性金属/合金薄膜来制备卷取蒸发制品，以及（2）在所述卷取蒸发制品的保持条件下，在所述蒸发物品的间隙中产生含有氧化气体的气流。

4. 发明授权

US4702938A Process for producing magnetic recording material 失效
标题翻译：磁记录材料的制造方法
公开(公告)号：US4702938A
公开(公告)日：1987-10-27
申请号：US933446
申请日：1986-11-21
申请人： Tadashi Yasunaga , Akio Yanai , Ryuji Shirahata
发明人： Tadashi Yasunaga , Akio Yanai , Ryuji Shirahata
IPC分类号： C23C14/08 , C23C14/56 , G11B5/842 , G11B5/848 , G11B5/85 , H01F10/02
CPC分类号： G11B5/848 , G11B5/842 , G11B5/85
摘要： A process for fabricating magnetic tape in which a tape substrate in passed through a stream of evaporating material so as to present a continuously varying angle of incidence to the stream. The maximum and minimum angles of incidence are defined. Oxidizing gas is applied to the tape at the minimum angle of incidence and at an intermediate angle.
摘要翻译：一种用于制造磁带的方法，其中带状基底通过蒸发材料流以便呈现与流的连续变化的入射角。定义最大和最小入射角。氧化气体以最小入射角以中间角度施加到带上。

5. 发明授权

US4988535A Magnetic recording medium 失效
公开(公告)号：US4988535A
公开(公告)日：1991-01-29
申请号：US242869
申请日：1988-09-12
申请人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
发明人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
IPC分类号： G11B5/66 , C08L67/02 , G11B5/64 , G11B5/706 , G11B5/73 , G11B5/851
CPC分类号： G11B5/65 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium comprises a non-magnetic substrate and a magnetic film which is formed on the non-magnetic substrate and the major component of which is iron nitride-oxide.

6. 发明授权

US4673610A Magnetic recording medium having iron nitride recording layer 失效
标题翻译：具有氮化铁记录层的磁记录介质
公开(公告)号：US4673610A
公开(公告)日：1987-06-16
申请号：US767778
申请日：1985-08-20
申请人： Ryuji Shirahata , Yoshihiro Arai , Tadashi Yasunaga
发明人： Ryuji Shirahata , Yoshihiro Arai , Tadashi Yasunaga
IPC分类号： C08L79/08 , G11B5/64 , G11B5/66 , G11B5/716 , G11B5/73 , G11B5/85
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/2495 , Y10T428/26
摘要： A magnetic recording medium comprises a non-magnetic substrate, a first magnetic film layer which is formed on the non-magnetic substrate and whose major component is cobalt, and a second magnetic film layer which is overlaid on the first magnetic film layer and whose major component is iron nitride.
摘要翻译：磁记录介质包括非磁性基板，形成在非磁性基板上并且其主要成分为钴的第一磁性膜层和覆盖在第一磁性膜层上的第二磁性膜层，其主要组分是氮化铁。

7. 发明授权

US4724156A Method of manufacturing magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4724156A
公开(公告)日：1988-02-09
申请号：US901976
申请日：1986-09-02
申请人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
发明人： Yoshihiro Arai , Tadashi Yasunaga , Ryuji Shirahata
IPC分类号： C23C16/34 , C23C14/48 , G11B5/706 , G11B5/85 , H01F10/02
CPC分类号： G11B5/85 , G11B5/70615
摘要： In manufacturing a magnetic recording medium, a flow of iron vapor is formed in a nitrogen atmosphere and iron vapor particles in the flow of iron vapor are deposited on a non-magnetic substrate together with nitrogen particles to form an iron nitride film thereon. Before deposition on the non-magnetic substrate, the nitrogen particles are ionized by an ion beam generating means and the iron vapor particles are ionized by a high-frequency discharge.
摘要翻译：在制造磁记录介质时，在氮气气氛中形成铁蒸气流，铁蒸汽流中的铁蒸气颗粒与氮颗粒一起沉积在非磁性基板上，以在其上形成氮化铁膜。在非磁性基板上沉积之前，通过离子束产生装置将氮颗粒离子化，并通过高频放电使铁蒸气颗粒离子化。

8. 发明申请

US20080316649A1 METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM PRODUCED BY THE PRODUCTION METHOD, AND MOLD STRUCTURE FOR USE IN THE PRODUCTION METHOD 审中-公开
标题翻译：用于生产磁记录介质的方法，由生产方法生产的磁记录介质和用于生产方法的模具结构
公开(公告)号：US20080316649A1
公开(公告)日：2008-12-25
申请号：US12142611
申请日：2008-06-19
申请人： Masakazu NISHIKAWA , Tadashi Yasunaga , Yoichi Nishida
发明人： Masakazu NISHIKAWA , Tadashi Yasunaga , Yoichi Nishida
IPC分类号： G11B5/74 , B05D5/12
CPC分类号： G11B5/855 , B82Y10/00 , G11B5/743 , G11B5/865
摘要： The present invention provides a method for producing a magnetic recording medium having servo areas and data areas using a mold structure having a plurality of convex portions, the method, including: forming an imprint resist layer on a surface of a substrate for the magnetic recording medium, forming a convexo-concave resist pattern in the formed imprint resist layer by pressing the plurality of convex portions of the mold structure against the imprint resist layer, and transferring magnetism to the servo areas in the magnetic recording medium by applying a magnetic field to the servo areas via the mold structure.
摘要翻译：本发明提供一种使用具有多个凸部的模具结构来制造具有伺服区域和数据区域的磁记录介质的方法，所述方法包括：在用于磁记录介质的基板的表面上形成压印抗蚀剂层通过将模具结构的多个凸部按压在抗蚀剂层上，在形成的抗压印层中形成凹凸的抗蚀剂图案，并通过对磁记录介质施加磁场将磁力传递到磁记录介质的伺服区域伺服区通过模具结构。

9. 发明授权

US07149042B2 Master carrier for magnetic transfer 失效
公开(公告)号：US07149042B2
公开(公告)日：2006-12-12
申请号：US11014944
申请日：2004-12-20
申请人： Masakazu Nishikawa , Tadashi Yasunaga , Kazuhiro Niitsuma
发明人： Masakazu Nishikawa , Tadashi Yasunaga , Kazuhiro Niitsuma
IPC分类号： G11B5/86
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/743 , G11B5/82 , G11B5/865
摘要： A master carrier for magnetic transfer is equipped with a substrate having a land/groove pattern. The land/groove pattern is formed from a magnetic material and corresponds to information that is transferred to a magnetic recording disk. Each land in the land/groove pattern has four round corners whose radius is from 1% through 47% of the width of a data track on the disk.

10. 发明授权

US07054082B2 Magnetic transfer method for a high-density magnetic recording medium 失效
公开(公告)号：US07054082B2
公开(公告)日：2006-05-30
申请号：US10163370
申请日：2002-06-07
申请人： Masakazu Nishikawa , Tadashi Yasunaga
发明人： Masakazu Nishikawa , Tadashi Yasunaga
IPC分类号： G11B5/86
CPC分类号： G11B5/865 , G11B5/59633 , G11B5/82
摘要： An accurate magnetic transfer to a high-density slave medium having two magnetic layers and utilizing antiferromagnetic coupling is performed. By applying a first magnetic field that causes both the first and second magnetic layers of the magnetic layer of a slave medium to reach saturation magnetization unidirectionally along the circumferential direction of the track, the first and second magnetic layers are magnetized uniformly in the same direction as the first magnetic field. Then, a second magnetic field that inverts the magnetization of the first magnetic layer and has no effect on the magnetization of the second magnetic layer is applied in the opposite direction, whereby only the magnetization direction of the first magnetic layer is inverted in the direction of the second magnetic field. Thereby, a favorable initial magnetization state in which the magnetization directions of the first and second magnetic layers are oriented antiparallel can be obtained.

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