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公开(公告)号：US20050111124A1
公开(公告)日：2005-05-26
申请号：US11014944
申请日：2004-12-20
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.
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公开(公告)号：US5405689A
公开(公告)日：1995-04-11
申请号：US056883
申请日：1993-05-05
申请人： Kazuyuki Usuki , Tadashi Yasunaga
发明人： Kazuyuki Usuki , Tadashi Yasunaga
CPC分类号： G11B5/738 , Y10S428/90 , Y10T428/25 , Y10T428/259 , Y10T428/26 , Y10T428/265 , Y10T428/3154 , Y10T428/31786
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having an undercoating layer provided on said non-magnetic support and a magnetic layer provided on said undercoating layer, wherein said undercoating layer provided between said non-magnetic support and said magnetic layer comprises mainly a non-magnetic fine particles having an average particle size of 100 to 350 .ANG. and a binder; said binder is a polyester resin having a glass transition temperature (Tg) of 40.degree. C. or less, said undercoating layer has a thickness of 30 to 250 .ANG.; and said magnetic layer is a ferromagnetic metal thin film.
摘要翻译： 公开了一种磁记录介质，包括具有设置在所述非磁性载体上的底涂层和设置在所述底涂层上的磁性层的非磁性载体，其中设置在所述非磁性载体和所述磁性层之间的所述底涂层包括 主要是平均粒度为100〜350和粘合剂的非磁性微粒; 所述粘合剂是玻璃化转变温度（Tg）为40℃以下的聚酯树脂，所述底涂层的厚度为30〜250; 并且所述磁性层是铁磁金属薄膜。
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公开(公告)号：US5334413A
公开(公告)日：1994-08-02
申请号：US978520
申请日：1992-11-18
申请人： Toshio Ishida , Yasuo Nishikawa , Tadashi Yasunaga
发明人： Toshio Ishida , Yasuo Nishikawa , Tadashi Yasunaga
IPC分类号： G11B5/72 , C09D5/23 , C09D171/02 , G11B5/64 , G11B5/725 , G11B5/73 , G11B5/84 , G11B5/85 , B05D5/12
CPC分类号： G11B5/85 , G11B5/725 , G11B5/8408
摘要： A ferromagnetic thin metal film type magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a ferromagnetic thin metal film, wherein a perfluoropolyether having at least one polar group having the saturation adsorption amount (mg/m.sup.2) of at least 4.0 mg/m.sup.2 against the ferromagnetic thin metal film is coated or applied onto the surface of the ferromagnetic thin metal film. There is also disclosed a method for preparing a ferromagnetic thin metal film type magnetic recording medium comprising forming a ferromagnetic thin metal film, subjecting the ferro-magnetic thin metal film to a treatment with oxygen gas, ozone gas, a heat treatment or a treatment with an inert gas, and then applying a perfluoropolyether having at least one polar group to the ferromagnetic thin metal film.
摘要翻译： 公开了一种铁磁性薄金属膜型磁记录介质，其包括其上具有铁磁性薄金属膜的非磁性载体，其中具有至少一个具有饱和吸附量（mg / m 2）的极性基团的全氟聚醚至少为4.0mg / m 2相对铁磁性金属薄膜被涂覆或施加到铁磁性金属薄膜的表面上。 还公开了一种制备铁磁性薄金属膜型磁记录介质的方法，该方法包括形成铁磁性金属薄膜，对铁磁性金属薄膜进行氧气处理，臭氧气体处理，热处理或用 惰性气体，然后将具有至少一个极性基团的全氟聚醚加到铁磁薄金属膜上。
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公开(公告)号：US4990361A
公开(公告)日：1991-02-05
申请号：US403075
申请日：1989-08-28
申请人： Tadashi Yasunaga , Akio Yanai , Koji Sasazawa
发明人： Tadashi Yasunaga , Akio Yanai , Koji Sasazawa
CPC分类号： G11B5/85
摘要： A method and apparatus for producing a magnetic recording medium having an improved durability with a simple process. Nitrogen molecules and/or nitrogen atoms in an excited state are applied to a nonmagnetic substrate simultaneously with an iron vapor flow and an ion flow. The resulting magnetic recording medium has superior corrosion resistance and can be produced at a high film forming rate, and is especially suitable for high density recording because of its high coercive force.
摘要翻译： 一种以简单的工艺制造具有改善的耐久性的磁记录介质的方法和装置。 处于激发态的氮分子和/或氮原子与铁蒸气流和离子流同时施加到非磁性基底上。 所得到的磁记录介质具有优异的耐腐蚀性，并且可以以高的成膜速度生产，并且由于其高矫顽力而特别适用于高密度记录。
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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。
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公开(公告)号：US4873154A
公开(公告)日：1989-10-10
申请号：US151722
申请日：1988-02-03
申请人： Tadashi Yasunaga , Akio Yanai
发明人： Tadashi Yasunaga , Akio Yanai
CPC分类号： G11B5/656 , Y10S428/90
摘要： A magnetic recording medium, such as a tape, having a thin ferromagnetic film containing Fe.sub.a Co.sub.b N.sub.c O.sub.d satisfying: 32%.ltoreq.a.ltoreq.90%; 5%.ltoreq.b.ltoreq.55%; 2%.ltoreq.c.ltoreq.28%; 5%.ltoreq.d.ltoreq.23%; and c+d.ltoreq.40%. Such a film provides enhanced resistance against corrosion.
摘要翻译： 具有包含FeaCobNcOd的薄铁磁性薄膜的磁记录介质，如磁带，满足：32％
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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
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。
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38.发明授权公开(公告)号：US07094481B2
公开(公告)日：2006-08-22
申请号：US10958327
申请日：2004-10-06
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/743 , G11B5/82 , G11B5/865 , Y10T428/273
摘要： A master information carrier for magnetic transfer to an in-plane magnetic recording medium includes a base sheet having an irregularity pattern representing information to be transferred to an in-plane magnetic recording medium and a magnetic layer formed along the irregularity pattern. The thickness da1 of the magnetic layer on the upper surface of a protruding portion of the irregularity pattern and the thickness da2 of the magnetic layer on each of the side surfaces of the protruding portion satisfy the following condition, 0.05
摘要翻译： 用于磁传递到平面内磁记录介质的主信息载体包括具有表示要传送到平面内磁记录介质的信息的不规则图案的基片和沿着不规则图案形成的磁性层。 不规则图案的突出部分的上表面上的磁性层的厚度da 1和突出部分的每个侧表面上的磁性层的厚度da 2满足以下条件： 公式描述=“内联公式”end =“lead”？> 0.05
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公开(公告)号：US06950252B2
公开(公告)日：2005-09-27
申请号：US10178550
申请日：2002-06-25
CPC分类号： B82Y10/00 , G11B5/59633 , G11B5/65 , G11B5/7315 , G11B5/743 , G11B5/865
摘要： A master carrier for magnetic transfer is equipped with a substrate with a land/groove pattern of lands and grooves, and a magnetic layer formed on the land/groove pattern. The adhesion between the substrate and the magnetic layer is 1.2×109 N/m2 or greater. A first oxygen concentration Do at the magnetic layer formed on the land is reduced gradually toward the direction of the depth of the substrate and is greater than a second oxygen concentration Dh at the magnetic layer formed on the groove.
摘要翻译： 用于磁转印的主载体配备有具有焊盘和凹槽的焊盘/凹槽图案的基板，以及形成在焊盘/凹槽图案上的磁性层。 衬底与磁性层之间的粘合力为1.2×10 9 / N 2/2以上。 形成在焊盘上的磁性层处的第一氧浓度D
朝着衬底的深度方向逐渐减小，并且大于第二氧浓度D < 在形成在凹槽上的磁性层上。 -
40.发明申请公开(公告)号：US20050181133A1
公开(公告)日：2005-08-18
申请号：US11103605
申请日：2005-04-12
CPC分类号： B82Y10/00 , G11B5/743 , G11B5/82 , G11B5/8404 , G11B5/858 , G11B5/865 , Y10T428/214
摘要： A master information carrier for magnetic transfer includes a master substrate made of metal, including an embossed pattern corresponding to information to be transferred. The master substrate is produced by laminating a metal disk with a predetermined thickness on an original disk, on which an embossed pattern is formed, by electroforming, peeling off the metal disk and die-cutting a disk in a desired size. An outer diameter of the metal disk is at least 1.7 times longer than an outer diameter of the die-cut master substrate. When the metal disk is peeled off from the original disk, deformation due to the forces acting from the side of the outer circumference is reduced. The flatness of the metal disk is ensured and the transfer qualities are improved. Further, a step of removing distortion of the metal disk, caused at the time of peeling off the metal disk, may also be provided.
摘要翻译： 用于磁转移的主信息载体包括由金属制成的母基板，包括对应于要传送的信息的压花图案。 通过电铸，剥离金属盘并以期望的尺寸对盘进行模切，将原始盘上形成有预定厚度的金属盘层叠在其上形成压花图案的母板上制造母版衬底。 金属盘的外径比模切母版基板的外径长至少1.7倍。 当金属盘从原始盘剥离时，由于从外周侧作用的力的变形减小。 确保金属盘的平坦度，提高转印质量。 此外，还可以提供在剥离金属盘时引起的去除金属盘的变形的步骤。
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