专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明申请

US20050048324A1 Magnetic reproducing method and magnetic recording medium 有权
标题翻译：磁再现方法和磁记录介质
公开(公告)号：US20050048324A1
公开(公告)日：2005-03-03
申请号：US10924823
申请日：2004-08-25
申请人： Kiyomi Ejiri
发明人： Kiyomi Ejiri
IPC分类号： G11B5/39 , G11B5/70 , G11B5/702 , G11B5/708
CPC分类号： G11B5/70 , G11B5/7021 , G11B5/7085 , Y10T428/24248 , Y10T428/265 , Y10T428/31
摘要： A method for reproducing information recorded on a magnetic recording medium comprising, in the following order, a non-magnetic flexible support, a non-magnetic lower layer containing non-magnetic powder and a binder, and a magnetic layer containing ferromagnetic powder, a binder and an abrasive, the magnetic layer having an average thickness of 30 to 150 nm, a density of projections having a height of 10 nm or more of 2,000 to 10,000 per 100 μm2 as measured by atomic force microscopy, and a scratch depth of 50 to 200 nm, the method comprising reading the magnetic recording medium with a magnetoresistive head having a magnetoresistive element, the magnetoresistive element being recessed 20 nm or less from a plane of contact with the magnetic recording medium.
摘要翻译：一种用于再现记录在磁记录介质上的信息的方法，包括以下顺序包括非磁性柔性支撑体，含有非磁性粉末和粘合剂的非磁性下层，以及含有铁磁粉末，粘结剂和研磨剂，磁性层的平均厚度为30〜150nm，通过原子力显微镜测定的高度为10nm以上的每100mum 2的高度为2000〜10,000的突起的密度，以及刮痕深度为50〜200nm，该方法包括用具有磁阻元件的磁阻头读出磁记录介质，磁阻元件从与磁记录介质接触的平面凹入20nm或更小。

22. 发明授权

US06735057B2 Method of magnetic recording/reproducing 有权
标题翻译：磁记录/再现方法
公开(公告)号：US06735057B2
公开(公告)日：2004-05-11
申请号：US10173885
申请日：2002-06-19
申请人： Kiyomi Ejiri
发明人： Kiyomi Ejiri
IPC分类号： G11B539
CPC分类号： G11B5/00 , G11B5/70678 , G11B2005/001 , G11B2005/0016 , Y10S428/90 , Y10T428/115
摘要： A method of magnetic recording/reproducing is disclosed, which comprises reproducing with a magnetoresistive head (MR head) signals recorded in a magnetic recording medium comprising a support having thereon a magnetic layer comprising mainly ferromagnetic particles and a binder, wherein the MR head has an element thickness of 50 nm or smaller and the ferromagnetic particles are hexagonal-ferrite magnetic particles having an average tabular diameter of from 10 to 40 nm and an average tabular thickness smaller than the element thickness of the MR head used for reproduction.
摘要翻译：公开了一种磁记录/再现方法，其包括用记录在磁记录介质中的磁阻磁头（MR磁头）信号进行再现，所述磁记录介质包括其上具有主要包含铁磁颗粒和粘结剂的磁性层的载体，其中MR磁头具有元素厚度为50nm以下，铁磁性粒子为平均片状直径为10〜40nm，平均片状厚度小于用于再现的MR头的元件厚度的六方晶系铁氧体磁性粒子。

23. 发明授权

US06667119B2 Magnetic recording medium comprising magnetic layers, the coercive force thereof specifically related to saturation magnetic flux density 有权
标题翻译：包含磁性层的磁记录介质，其矫顽力与饱和磁通密度特别相关
公开(公告)号：US06667119B2
公开(公告)日：2003-12-23
申请号：US09950694
申请日：2001-09-13
申请人： Kiyomi Ejiri , Minoru Sueki
发明人： Kiyomi Ejiri , Minoru Sueki
IPC分类号： G11B566
CPC分类号： G11B5/716
摘要： A magnetic recording medium having on a support at least two magnetic layers that include an uppermost magnetic layer for recording information and a lower magnetic layer for recording servo signals, wherein the uppermost magnetic layer has a coercive force Hc(U) [KA/m] at most 265 times as much as a saturated magnetic flux density Bs[T] of a recording head used for information recording and the lower magnetic layer has a coercive force Hc(L) [KA/m] at least 159 times as much as the saturated magnetic flux density Bs[T] of the recording head used for information recording, thereby ensuring highly accurate servo write and elevation of recording density.
摘要翻译：一种磁记录介质，在至少两个磁性层上具有至少两个磁性层，所述磁性层包括用于记录信息的最上层的磁性层和用于记录伺服信号的下部磁性层，其中最上面的磁性层具有矫顽力Hc（U）[KA / m] 是用于信息记录的记录头的饱和磁通密度Bs [T]的265倍以下，下磁性层的矫顽力Hc（L）[KA / m]至少为用于信息记录的记录头的饱和磁通密度Bs [T]，从而确保高度精确的伺服写入和记录密度的提高。

24. 发明授权

US06558772B2 Magnetic recording medium and method of manufacturing same 失效
公开(公告)号：US06558772B2
公开(公告)日：2003-05-06
申请号：US09885558
申请日：2001-06-20
申请人： Kiyomi Ejiri , Masahiko Mori
发明人： Kiyomi Ejiri , Masahiko Mori
IPC分类号： G11B5712
CPC分类号： G11B5/714 , G11B5/70678 , G11B5/842 , G11B5/855 , Y10T428/24355 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/265
摘要： Enclosed is a magnetic recording medium obtained by sequentially providing on a flexible nonmagnetic support a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder. The thickness of the magnetic layer is 0.01-0.1 &mgr;m and the ratio of the exposed area of nonmagnetic power on the surface of the magnetic layer is not greater than 10 percent. A method of manufacturing a magnetic recording medium comprising coating a nonmagnetic layer coating liquid on a flexible nonmagnetic support and applying a magnetic layer coating liquid on the coated layer while the coated layer is still wet. The ratio of the exposed area of nonmagnetic power on the surface of the magnetic layer is not greater than 10 percent; the nonmagnetic layer coating liquid has a yield stress of not less than 100 &mgr;N/cm2 or 10 dyne/cm2 and the solid component concentration of the magnetic layer coating liquid is greater than the solid component concentration of the nonmagnetic layer coating liquid. A particulate magnetic recording medium having a magnetic layer of not greater than 0.1 &mgr;m, good production properties, and good electromagnetic characteristics when used with MR heads is provided.

25. 发明授权

US5718964A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5718964A
公开(公告)日：1998-02-17
申请号：US738727
申请日：1996-10-28
申请人： Koji Naoe , Kiyomi Ejiri , Hiroaki Takano
发明人： Koji Naoe , Kiyomi Ejiri , Hiroaki Takano
IPC分类号： G11B5/70 , G11B5/708
CPC分类号： G11B5/70 , G11B5/708 , Y10T428/24355 , Y10T428/25 , Y10T428/256
摘要： A magnetic recording medium is disclosed, comprising a flexible non-magnetic medium having on at least one surface thereof a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein the heights and the existing densities of the abrasive projections and the non-abrasive projections on the surface of the magnetic layer are defined in the specific ranges. The magnetic recording medium are excellent in the electromagnetic characteristics, the magnetic head abrasion resistance, and the running durability.
摘要翻译：公开了一种磁记录介质，包括柔性非磁性介质，其至少在其一个表面上具有分散在粘合剂中的铁磁粉末的磁性层，其中研磨突起和非研磨突起的高度和现有密度在磁性层的表面上限定在特定范围内。磁记录介质具有优异的电磁特性，磁头耐磨性和运行耐久性。

26. 发明授权

US5645917A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5645917A
公开(公告)日：1997-07-08
申请号：US873201
申请日：1992-04-24
申请人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
发明人： Kiyomi Ejiri , Hiroo Inaba , Shinji Saito , Satoru Hayakawa
IPC分类号： G11B5/66 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , G11B5/848
CPC分类号： G11B5/848 , G11B5/70 , G11B5/716 , G11B5/733 , G11B5/738 , G11B5/842 , Y10S428/90 , Y10T428/12472 , Y10T428/24355 , Y10T428/24942 , Y10T428/25 , Y10T428/253 , Y10T428/256 , Y10T428/257 , Y10T428/258 , Y10T428/259 , Y10T428/265 , Y10T428/269 , Y10T428/31551 , Y10T428/31721 , Y10T428/31855
摘要： A magnetic recording medium is disclosed comprising a non-magnetic support having provided thereon at least a lower non-magnetic layer comprising a binder having dispersed therein a non-magnetic powder and an upper magnetic layer comprising a binder having dispersed therein a ferromagnetic powder which has been coated on said lower non-magnetic layer while the lower non-magnetic layer is wet, wherein the upper magnetic layer has an average dry thickness (d) of not more than 1.0 .mu.m and an average thickness variation (.sup..DELTA. d) at the interface between the upper magnetic layer and lower non-magnetic layer is not more than d/2. The magnetic recording medium exhibits excellent electromagnetic characteristics, running properties, and durability.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上设置有至少一个包含分散有非磁性粉末的粘合剂的下部非磁性层和包含分散有铁磁性粉末的粘合剂的上层磁性层，被涂覆在所述下部非磁性层上，而下部非磁性层是湿的，其中上部磁性层的平均干燥厚度（d）不大于1.0μm，平均厚度变化（DELTA d）在上磁层与下层非磁性层之间的界面不大于d / 2。磁记录介质表现出优异的电磁特性，运行性能和耐久性。

27. 发明授权

US5455112A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5455112A
公开(公告)日：1995-10-03
申请号：US10846
申请日：1993-01-29
申请人： Hiroo Inaba , Kiyomi Ejiri
发明人： Hiroo Inaba , Kiyomi Ejiri
IPC分类号： C09C1/48 , C09D5/23 , C09D7/12 , G11B5/73 , G11B5/733 , G11B5/738 , B32B5/16 , G11B5/66
CPC分类号： G11B5/738 , G11B5/733 , Y10S428/90 , Y10S428/928 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/259 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium produced by providing a lower non-magnetic layer comprising a non-magnetic powder dispersed in a binder on a non-magnetic support followed by providing, while the lower non-magnetic layer is still wet, an upper magnetic layer comprising a ferromagnetic powder dispersed in a binder on the lower non-magnetic layer, wherein a mean thickness of the upper magnetic layer is 1.0 .mu.m or less and the non-magnetic powder in the lower non-magnetic layer comprises (A) a granular inorganic powder having a mean particle size of from 0.01 to 0.08 .mu.m, (B) a carbon black powder having a mean particle size of from 0.01 to 0.04 .mu.m and (C) a powder component having a larger mean particle size than the mean particle size of each of powders (A) and (B). The magnetic recording medium has good electromagnetic characteristics and has excellent running durability with little edge damage after repeated running.
摘要翻译：提供一种磁记录介质，其通过在非磁性载体上提供分散在粘合剂中的非磁性粉末的下部非磁性层，然后在下部非磁性层仍然是湿的同时提供包括分散在下层非磁性层上的粘合剂中的铁磁性粉末，其中上磁性层的平均厚度为1.0μm以下，下部非磁性层中的非磁性粉末包含（A）粒状无机粉末平均粒径为0.01〜0.08μm，（B）平均粒径为0.01〜0.04μm的炭黑粉末，（C）平均粒径大于平均粒径的粉末成分的粉末（A）和（B）。磁记录介质具有良好的电磁特性，具有优异的运行耐久性，反复运行后边缘损伤小。

28. 发明授权

US5447782A Magnetic recording medium having a specified thickness relationship between a nonmagnetic underlayer and overcoated magnetic layers 失效
标题翻译：在非磁性底层和外涂磁性层之间具有特定厚度关系的磁记录介质
公开(公告)号：US5447782A
公开(公告)日：1995-09-05
申请号：US143063
申请日：1993-10-29
申请人： Hiroo Inaba , Kiyomi Ejiri , Koji Naoe
发明人： Hiroo Inaba , Kiyomi Ejiri , Koji Naoe
IPC分类号： C09D5/23 , G11B5/70 , G11B5/716 , G11B5/73 , G11B5/738 , G11B5/00
CPC分类号： G11B5/70 , G11B5/716 , G11B5/738 , Y10S428/90 , Y10T428/24942 , Y10T428/2495 , Y10T428/24967 , Y10T428/256 , Y10T428/257
摘要： Disclosed is a magnetic recording medium, comprising (a) a nonmagnetic flexible support, (b) a lower nonmagnetic layer provided on the support and comprising a nonmagnetic particle and a binder, and (c) a magnetic layer provided on the nonmagnetic layer and comprising a ferromagnetic particle and a binder, wherein (i) the magnetic layer comprises at least two layers comprising a lower magnetic layer provided on the lower nonmagnetic layer and an upper magnetic layer provided on the lower magnetic layer, (ii) a ratio of the lower nonmagnetic layer thickness to the total magnetic layer thickness of the lower magnetic layer and the upper magnetic layer is from 1 to 50, (iii) the upper magnetic layer and the lower magnetic layer have a difference in coercive force of at least 80 Oe, and (iv) the lower nonmagnetic layer and at least the lower magnetic layer are formed by a wet-on-wet coating method.
摘要翻译：公开了一种磁记录介质，包括（a）非磁性柔性支撑体，（b）设置在载体上的下部非磁性层，并且包括非磁性颗粒和粘合剂，和（c）设置在非磁性层上的磁性层，铁磁颗粒和粘合剂，其中（i）磁性层包括至少两层，包括设置在下部非磁性层上的下部磁性层和设置在下部磁性层上的上部磁性层，（ii）下部磁性层的比例非磁性层厚度与下部磁性层和上部磁性层的总磁性层厚度的比值为1〜50，（iii）上部磁性层和下部磁性层的矫顽力差异至少为80 Oe，（iv）下部非磁性层和至少下部磁性层通过湿式湿式涂覆法形成。

29. 发明授权

US5318838A Magnetic recording medium comprising ferromagnetic particles, binder resins and phenyl phosphonic acid 失效
标题翻译：包含铁磁颗粒，粘合剂树脂和苯基膦酸的磁记录介质
公开(公告)号：US5318838A
公开(公告)日：1994-06-07
申请号：US26163
申请日：1993-03-01
申请人： Akihiro Matsufuji , Kiyomi Ejiri , Mikihiko Kato , Takao Ohya
发明人： Akihiro Matsufuji , Kiyomi Ejiri , Mikihiko Kato , Takao Ohya
IPC分类号： G11B5/702 , G11B5/00
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/256 , Y10T428/2991 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a non magnetic support having thereon a magnetic layer comprising binder resins, ferromagnetic particles and an organic phosporus compound.
摘要翻译：一种磁记录介质，其包含非磁性载体，其上具有包含粘合剂树脂，铁磁颗粒和有机磷化合物的磁性层。

30. 发明授权

US5250354A Magnetic recording medium containing magnetic alloy powder and specified binder resins and having a kerr rotational angle of 5 minutes or more 失效
标题翻译：含有磁性合金粉末和指定的粘合剂树脂并具有5分钟或更长的克尔旋转角度的磁记录介质
公开(公告)号：US5250354A
公开(公告)日：1993-10-05
申请号：US689589
申请日：1991-04-19
申请人： Kiyomi Ejiri
发明人： Kiyomi Ejiri
IPC分类号： G11B5/68 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/714 , G11B5/84 , G11B5/00
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/265 , Y10T428/3158 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium excellent in electromagnetic characteristics and running durability and a method for producing the same are disclosed, the magnetic recording medium comprising a non-magnetic support and a magnetic layer formed thereon, the magnetic layer containing a magnetic alloy powder and a binder, wherein said magnetic alloy powder has a length in the long axis of 2,000 .ANG. or less and a saturation magnetization (.sigma.s) of 100 emu/g or more; said binder contains a vinyl chloride copolymer, a polyisocyanate, and a polyurethane resin, wherein the polyurethane resin has at least 3 hydroxyl groups per molecule and at least 1.times.10.sup.-5 eq/g of at least one type of polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM, --PO(OM').sub.2 and --OPO(OM').sub.2 (wherein each of M and M' represents a hydrogen atom, an alkali metal or ammonium ion) and the polyurethane resin is used in an amount equal to or more than by weight that of the polyisocyanate, and wherein the vinyl chloride copolymer has at least 1.times.10.sup.-5 eq/g of at least one type of polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM, --PO(OM').sub.2 and --OPO(OM').sub.2 (wherein each of M and M' represents a hydrogen atom, an alkali metal or ammonium ion); and a Kerr rotational angle measured at a surface of the magnetic layer is 5 minutes or more.
摘要翻译：公开了电磁特性和运行耐久性优异的磁记录介质及其制造方法，所述磁记录介质包括非磁性载体和形成在其上的磁性层，所述磁性层含有磁性合金粉末和粘合剂，其中所述磁性合金粉末的长轴长度为2000安培或更小，饱和磁化强度（sigma s）为100emu / g以上; 所述粘合剂含有氯乙烯共聚物，多异氰酸酯和聚氨酯树脂，其中所述聚氨酯树脂每分子具有至少3个羟基和至少1×10 -5 eq / g的至少一种类型的选自以下的极性基团：的-SO 3 M，-OSO 3 M，-COOM，-PO（OM'）2和-OPO（OM'）2（其中M和M'各自表示氢原子，碱金属或铵离子），聚氨酯树脂使用量等于或大于多异氰酸酯的量，并且其中氯乙烯共聚物具有至少1×10 -5 eq / g的至少一种选自-SO 3 M，-OSO 3 M的极性基团，-COOM，-PO（OM'）2和-OPO（OM'）2（其中M和M'各自表示氢原子，碱金属或铵离子）; 并且在磁性层的表面测量的克尔旋转角为5分钟以上。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式