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11. 发明授权

US06391423B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06391423B1
公开(公告)日：2002-05-21
申请号：US09584191
申请日：2000-05-31
申请人： Satoshi Sato , Shinichi Matsumura
发明人： Satoshi Sato , Shinichi Matsumura
IPC分类号： G11B5733
CPC分类号： G11B5/73 , Y10S428/90 , Y10T428/24355 , Y10T428/31725
摘要： A magnetic recording medium exhibiting satisfactory electromagnetic conversion characteristic and movement characteristics and incorporating a non-magnetic support member made of aromatic polyamide film. The magnetic recording medium incorporating a non-magnetic support member having a principal plane on which a magnetic layer constituted by at least a thin metal film is formed, wherein said non-magnetic support member has said principal plane on which at least said thin metal film is formed and on which small projections, the height of each of which is 10 nm to 40 nm from the central surface, are formed at a density of 1,000,000 pieces/mm2 to 20,000,000 pieces/mm2, and a bearing curve of the principal plane of said non-magnetic support member on which said small projection have been formed is such that the gradient of a straight line is −0.3 or smaller when a range of 10 nm in the upper portion is linearly approximated with a straight line by a least square approximation and the intercept is 10 nm to 40 nm.
摘要翻译：表现出令人满意的电磁转换特性和运动特性的磁记录介质，并结合由芳族聚酰胺薄膜制成的非磁性支撑件。该磁记录介质包括具有主平面的非磁性支撑构件，在该主平面上形成有至少由金属薄膜构成的磁性层，其中所述非磁性支撑构件具有至少所述薄金属膜并且其中每个的中心表面的高度为10nm至40nm的小突起以1,000,000个/ mm 2至20,000,000个/ mm 2的密度形成，并且其主平面的轴承曲线形成了所述小突起的所述非磁性支撑构件使得当上部的10nm的范围用直线近似近似近似的直线时，直线的梯度为-0.3或更小截距为10nm〜40nm。

12. 发明授权

US06287668B1 Magnetic recording medium and substrate therefor 有权
标题翻译：磁记录介质及其基板
公开(公告)号：US06287668B1
公开(公告)日：2001-09-11
申请号：US09523646
申请日：2000-03-10
申请人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
发明人： Kazuyuki Hayashi , Keisuke Iwasaki , Yasuyuki Tanaka , Hiroko Morii
IPC分类号： G11B5733
CPC分类号： B82Y30/00 , C01P2004/03 , C01P2004/04 , C01P2004/10 , C01P2004/20 , C01P2004/32 , C01P2004/38 , C01P2004/50 , C01P2004/51 , C01P2004/54 , C01P2004/62 , C01P2004/64 , C01P2004/80 , C01P2004/82 , C01P2004/84 , C01P2004/86 , C01P2006/12 , C01P2006/19 , C01P2006/22 , C01P2006/40 , C01P2006/42 , C01P2006/60 , C01P2006/62 , C01P2006/80 , C09C1/24 , C09C3/006 , C09C3/12 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/257 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： A magnetic recording medium of the present invention comprises: a non-magnetic base film; a non-magnetic undercoat layer formed on said non-magnetic base film, comprising a binder resin and non-magnetic acicular black iron-based composite particles; and a magnetic coating film comprising a binder resin and magnetic particles, said non-magnetic acicular black iron-based composite particles comprising: acicular hematite particles or acicular iron oxide hydroxide particles having an average major axis diameter of 0.02 to 0.30 &mgr;m; a coating layer formed on the surface of said acicular hematite particle or acicular iron oxide hydroxide particle, comprising a specific organosilicon compound; and a carbon black coat formed on said coating layer. Such a magnetic recording medium has a more smooth surface, a high strength and a lower light transmittance and a low electric resistance even at a small carbon black content.
摘要翻译：本发明的磁记录介质包括：非磁性基膜;在所述非磁性基膜上形成的非磁性底涂层，包括粘合剂树脂和非磁性针状黑铁基复合颗粒; 以及包含粘合剂树脂和磁性颗粒的磁性涂膜，所述非磁性针状黑铁基复合颗粒包括：平均长轴直径为0.02至0.30μm的针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒; 形成在所述针状赤铁矿颗粒或针状铁氧化物氢氧化物颗粒的表面上的涂层，其包含特定的有机硅化合物; 以及形成在所述涂层上的炭黑涂层。即使在小的炭黑含量下，这种磁记录介质具有更光滑的表面，高强度和更低的透光率和低的电阻。

13. 发明授权

US06258442B1 Biaxially oriented polyester film for magnetic recording media 有权
标题翻译：用于磁记录介质的双轴取向聚酯薄膜
公开(公告)号：US06258442B1
公开(公告)日：2001-07-10
申请号：US09254201
申请日：1999-03-03
申请人： Tatsuya Ogawa , Hideaki Watanabe , Manabu Kimura
发明人： Tatsuya Ogawa , Hideaki Watanabe , Manabu Kimura
IPC分类号： G11B5733
CPC分类号： G11B5/733 , C08J5/18 , C08J2367/02 , C08L67/02 , Y10S428/90 , Y10T428/24355 , Y10T428/24975 , Y10T428/25 , Y10T428/254 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/26 , Y10T428/265 , Y10T428/266 , Y10T428/31786 , C08L83/00
摘要： A biaxially oriented polyester film for a magnetic recording medium, which comprises an aromatic polyester resin composition comprising: (A) an aromatic polyester, (B) silicone resin particles which can be obtained by polymerizing a silane compound containing trialkoxysilane in the presence of a surfactant and water, contain at least 80 wt % of recurring units and are substantially spherical, and (C) other inert fine particles. This biaxially oriented polyester film for a magnetic recording medium has an extremely small number of coarse protrusions and excellent winding property, abrasion resistance and traveling durability and can be produced at a low production cost.
摘要翻译：一种用于磁记录介质的双轴取向聚酯膜，其包含芳族聚酯树脂组合物，其包含：（A）芳族聚酯，（B）可在表面活性剂存在下使含有三烷氧基硅烷的硅烷化合物聚合而获得的有机硅树脂颗粒和水，含有至少80重量％的重复单元，并且基本上是球形的，和（C）其它惰性细颗粒。用于磁记录介质的该双轴取向聚酯膜具有极少数量的粗突起和优异的卷绕性能，耐磨性电阻和行驶耐久性，并且可以以低的生产成本生产。

14. 发明授权

US06231963B1 Magnetic recording media 失效
标题翻译：磁记录媒体
公开(公告)号：US06231963B1
公开(公告)日：2001-05-15
申请号：US08913808
申请日：1998-03-17
申请人： August Lehner , Helmut Jakusch , Volker Koch , Manfred Ohlinger , Albert Kohl , Werner Lenz , Norbert Schneider , Peter Heilmann , Werner Hübner , Erich Hoffmann , Ronald John Veitch , Rudi Lehnert , Harald Jachow
发明人： August Lehner , Helmut Jakusch , Volker Koch , Manfred Ohlinger , Albert Kohl , Werner Lenz , Norbert Schneider , Peter Heilmann , Werner Hübner , Erich Hoffmann , Ronald John Veitch , Rudi Lehnert , Harald Jachow
IPC分类号： G11B5733
CPC分类号： G11B5/708 , G11B5/733 , G11B5/738 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).
摘要翻译：描述了包括非磁性基板（III）的带式磁记录介质（I），至少一个施加到基板的膜，并且在这些膜中的至少一个膜中，适合用作支撑颜料，颜料（II）的平均长度与平均直径的比率至少为3，膜的平均弹性模量在带式记录介质的纵向方向上不小于15GPa （一世）。

15. 发明授权

US06207252B1 Magnetic recording medium and production method thereof 失效
标题翻译：磁记录介质及其制备方法
公开(公告)号：US06207252B1
公开(公告)日：2001-03-27
申请号：US09103792
申请日：1998-06-24
申请人： Osamu Shimomura
发明人： Osamu Shimomura
IPC分类号： G11B5733
CPC分类号： G11B5/70 , G11B5/738 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： A magnetic recording medium is formed on a non-magnetic support and a magnetic layer containing a binder and a ferromagnetic powder and having a thickness of 0.7 &mgr;m or thinner is formed on the non-magnetic support wherein the surface roughness Ra of the surface of the medium is from 0.5 to 7 nm and the skewness RSK of the surface of the medium is 0.1 or lower. The magnetic recording medium preferably has a nonmagnetic underlayer containing a binder and non-magnetic particles such as carbon black, between the non-magnetic support and the magnetic layer. The magnetic recording medium has excellent electromagnetic recording characteristics and torque characteristics and is suitable for high-density recording.
摘要翻译：在非磁性载体上形成磁记录介质，并且在非磁性载体上形成含有粘合剂和铁磁性粉末并且具有0.7μm或更薄的厚度的磁性层，其中表面的表面粗糙度Ra 介质为0.5〜7nm，介质表面的偏斜度RSK为0.1以下。磁记录介质优选在非磁性载体之间具有含有粘合剂和非磁性粒子（例如炭黑）的非磁性底层和磁性层。磁记录介质具有优异的电磁记录特性和扭矩特性，适用于高密度记录。

16. 发明授权

US06203884B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06203884B1
公开(公告)日：2001-03-20
申请号：US09211003
申请日：1998-12-15
申请人： Satoshi Sato , Shinichi Matsumura , Yuichi Arisaka
发明人： Satoshi Sato , Shinichi Matsumura , Yuichi Arisaka
IPC分类号： G11B5733
CPC分类号： G11B5/7315 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/265 , Y10T428/31725
摘要： The present invention provides a metal thin film type magnetic recording medium including a non-magnetic substrate made from a polyamide film whose surface configuration is controlled so as to obtain an optimal fine configuration of a magnetic layer surface, enabling to simultaneously obtain a preferable electro-magnetic conversion characteristic and preferable running characteristic. The non-magnetic substrate is made from an aromatic polyamide film formed in such a manner that fine protrusions having an average height of 5 to 50 nm are formed in a range of 103 to 105 thousand pieces/mm2 on a surface where a ferromagnetic metal thin film is to be formed.
摘要翻译：本发明提供一种金属薄膜型磁记录介质，其包括由聚酰胺薄膜制成的非磁性基材，其表面形状被控制以获得磁性层表面的最佳精细构型，能够同时获得优选的电 - 磁转换特性和优选的行走特性。非磁性基材由芳族聚酰胺薄膜制成，其形成方式是使平均高度为5〜50nm的微细突起形成在103〜105000张/ mm 2的范围内在要形成铁磁金属薄膜的表面上。

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