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1.发明申请Magnetic recording medium and method for evaluating magnetic recording medium 审中-公开磁记录介质和评估磁记录介质的方法公开(公告)号：US20060019128A1
公开(公告)日：2006-01-26
申请号：US10895846
申请日：2004-07-22
申请人： Hiroyuki Tanaka , Takashi Handa , Tomoyuki Kotaki
发明人： Hiroyuki Tanaka , Takashi Handa , Tomoyuki Kotaki
摘要： A magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness and is excellent in electromagnetic conversion property is provided. A method for evaluating the surface smoothness of a magnetic recording medium is also provided. A magnetic recording medium comprising: a non-magnetic support; a non-magnetic layer which is on one surface of the non-magnetic support and comprises at least carbon black, a non-magnetic-powder other than the carbon black and a binder resin; and a magnetic layer which is on the non-magnetic layer and comprises at least a ferromagnetic powder and a binder resin, wherein when the shape of irregularities of the surface of the magnetic layer is subjected to Fourier transformation to obtain the power spectrum density (PSD) in the longitudinal direction of the magnetic recording medium, the power spectrum density L2 at a wavelength 2λ in the longitudinal direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 6.0×10−6 nm2mm or less. A magnetic recording medium, wherein when the power spectrum density (PSD) in the width direction of the magnetic recording medium is obtained, the power spectrum density W2 at a wavelength 2λ in the width direction, wherein λ (μm) represents the shortest recording wavelength of a recording and reproducing device for the magnetic recording medium, is 3.5×10−6 nm2mm or less.
摘要翻译： 提供了具有表面平滑性优异且电磁转换特性优异的薄膜磁性层的磁记录介质。 还提供了用于评估磁记录介质的表面平滑度的方法。 一种磁记录介质，包括：非磁性载体; 非磁性层，其在所述非磁性载体的一个表面上并且至少包含炭黑，除了所述炭黑以外的非磁性粉末和粘合剂树脂; 以及磁性层，其位于非磁性层上并且至少包含铁磁性粉末和粘合剂树脂，其中当磁性层的表面的不规则形状进行傅里叶变换以获得功率谱密度（PSD ）在纵向方向上的波长为2λ的功率谱密度L 2 2，其中λ（mum）表示记录和再现装置的最短记录波长，用于 磁记录介质为6.0×10 -6〜2×2mm以下。 一种磁记录介质，其中当获得在磁记录介质的宽度方向上的功率谱密度（PSD）时，在宽度方向的波长为2λ的功率谱密度W 2 2，其中λ （mum）表示用于磁记录介质的记录和再现装置的最短记录波长，是3.5×10 -6 nm 2或以下。
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公开(公告)号：US20060019127A1
公开(公告)日：2006-01-26
申请号：US10898232
申请日：2004-07-26
IPC分类号： G11B5/716
CPC分类号： G11B5/738
摘要： The present invention provides a magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness, and is excellent in electromagnetic conversion property. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 7 to 23 μg of PO43− ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 8 to 22 μg of Mg2+ ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium.
摘要翻译： 本发明提供一种具有表面平滑性优异的薄膜磁性层的磁记录介质，并且电磁转换特性优异。 一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和 在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，7至23杯PO 3 - 3 - 提取每10毫米3磁记录介质的下非磁性层的体积。 一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和 在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，每10 mm 3提取8至22杯Mg 2+离子 磁记录介质的下非磁性层的体积。
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公开(公告)号：US07893764B2
公开(公告)日：2011-02-22
申请号：US12535634
申请日：2009-08-04
申请人： Takashi Handa , Toshiro Mayuzumi
发明人： Takashi Handa , Toshiro Mayuzumi
IPC分类号： H03F21/00
CPC分类号： H03F3/2173
摘要： Common mode choke coil device includes four coils wound on a core in a same direction. Hot-side outputs of first and second class-D amplifiers are connected to respective ones of first ends of two of the four coils, and first and second hot-side output terminals are connected to respective ones of second ends of the two coils. Ground-side outputs of the first and second class-D amplifiers are connected to respective ones of the first ends of remaining two of the four coils, and first and second ground-side output terminals are connected to respective ones of the second ends of the remaining two coils. Single-end connection is realized by connecting a separate load to each of the class-D amplifiers via the corresponding first (or second) hot-side and ground-side output terminals. BTL connection is realized by connecting a single load to the class-D amplifiers via the first and second hot-side output terminals.
摘要翻译： 共模扼流线圈装置包括沿相同方向缠绕在芯上的四个线圈。 第一和第二D类放大器的热侧输出连接到四个线圈中的两个的第一端的相应的一端，第一和第二热侧输出端连接到两个线圈的相应的第二端。 第一和第二D类放大器的接地端输出连接到四个线圈中的剩余两个的第一端中的相应的一端，第一和第二接地侧输出端连接到 剩下两个线圈。 通过相应的第一（或第二）热侧和接地侧输出端子将单独的负载连接到每个D类放大器来实现单端连接。 通过第一和第二热侧输出端子将单个负载连接到D类放大器来实现BTL连接。
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公开(公告)号：US07425378B2
公开(公告)日：2008-09-16
申请号：US10898232
申请日：2004-07-26
IPC分类号： G11B5/66
CPC分类号： G11B5/738
摘要： The present invention provides a magnetic recording medium which has a thin film magnetic layer considerably excellent in surface smoothness, and is excellent in electromagnetic conversion property. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 7 to 23 μg of PO43− ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium. A magnetic recording medium comprising a non-magnetic support, a lower non-magnetic layer comprising at least a non-magnetic powder and a binder resin on one surface of the non-magnetic support, and a magnetic layer comprising at least a ferromagnetic powder and a binder resin on the lower non-magnetic layer, wherein when the magnetic recording medium is subjected to extraction treatment with water, 8 to 22 μg of Mg2+ ions are extracted per 10 mm3 of the volume of the lower non-magnetic layer of the magnetic recording medium.
摘要翻译： 本发明提供一种具有表面平滑性优异的薄膜磁性层的磁记录介质，并且电磁转换特性优异。 一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和 在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，7至23杯PO 3 - 3 - 提取每10毫米3磁记录介质的下非磁性层的体积。 一种磁记录介质，包括非磁性载体，在非磁性载体的一个表面上至少包含非磁性粉末和粘合剂树脂的下部非磁性层，以及至少包含铁磁性粉末和 在下部非磁性层上的粘合剂树脂，其中当磁记录介质用水进行萃取处理时，每10 mm 3提取8至22杯Mg 2+离子 磁记录介质的下非磁性层的体积。
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公开(公告)号：US5506064A
公开(公告)日：1996-04-09
申请号：US381090
申请日：1995-01-31
申请人： Kiminori Tamai , Takashi Handa
发明人： Kiminori Tamai , Takashi Handa
CPC分类号： G11B5/653 , G11B5/712 , Y10S428/90 , Y10T428/256 , Y10T428/2982 , Y10T428/2991 , Y10T428/30
摘要： Iron carbide particles are heat treated in a nitrogen atmosphere to form magnetic particles each comprising an iron base core and a carbon base surface. This magnetic particle powder having increased saturation magnetization .sigma.s is mixed with a binder to form a magnetic layer on a substrate, thus providing a magnetic recording medium which exhibits improved remanence Br and reproduces increased outputs.
摘要翻译： 在氮气气氛中对碳化铁颗粒进行热处理以形成各自包含铁基芯和碳基表面的磁性颗粒。 将具有增加的饱和磁化σs的磁性颗粒粉末与粘合剂混合以在基底上形成磁性层，从而提供表现出改善的剩磁Br并再现增加的输出的磁记录介质。
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公开(公告)号：US5618637A
公开(公告)日：1997-04-08
申请号：US408106
申请日：1995-03-21
申请人： Kiminori Tamai , Takashi Handa
发明人： Kiminori Tamai , Takashi Handa
IPC分类号： G11B5/702 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/706 , G11B5/712 , G11B5/842 , G11B5/66
CPC分类号： G11B5/70615 , G11B5/712 , G11B5/842 , Y10S428/90 , Y10T428/256 , Y10T428/257
摘要： An object is to provide magnetic recording medium having a densely packed, highly oriented magnetic layer by enhancing the dispersibility of magnetic powder having a carbon or iron carbide base surface. Magnetic powder is pretreated by kneading and dispersing it with an organic solvent and optionally, an anionic or ampholytic surfactant and a fatty acid, and a resin containing an amino group or ammonium salt group is used as a binder.
摘要翻译： 目的是通过提高具有碳或碳化铁基底表面的磁粉的分散性来提供具有密集堆积的高定向磁性层的磁记录介质。 通过将有机溶剂和任选的阴离子或两性表面活性剂和脂肪酸进行捏和和分散来预处理磁性粉末，并且使用含有氨基或铵盐基团的树脂作为粘合剂。
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公开(公告)号：US4543273A
公开(公告)日：1985-09-24
申请号：US563928
申请日：1983-12-21
申请人： Takashi Handa , Yoshiaki Okayama
发明人： Takashi Handa , Yoshiaki Okayama
IPC分类号： C04B35/457 , G01N27/12 , B05D5/12
CPC分类号： G01N27/12
摘要： An element for selectively sensing carbon monoxide which is capable of sensing a lower concentration of CO in a quicker response time at ordinary temperatures without the need of heating the element with better SN and low temperature dependence.
摘要翻译： 用于选择性地感测一氧化碳的元件，其能够在常温下以更快的响应时间感测较低浓度的CO，而不需要以更好的SN和低温度依赖性加热该元件。
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公开(公告)号：US4251225A
公开(公告)日：1981-02-17
申请号：US62513
申请日：1979-07-27
申请人： Takashi Handa , Koichi Endo
发明人： Takashi Handa , Koichi Endo
CPC分类号： G01N27/12 , Y10T436/205831
摘要： Method of detecting carbon monoxide gas at temperatures of 100.degree. C. or less by using a detecting element containing stannic oxide as the main component, which element is prepared by mixing stannic oxide, antimony trioxide and platinum in atomic ratios of Sb/Sn = at least 0.005, Pt/Sn = at least 0.004 and Sb/Pt = at least 0.005, and sintering said mixture at a temperature of at least 625.degree. C.
摘要翻译： 通过使用含有锡氧化物作为主要成分的检测元件，在100℃以下的温度下检测一氧化碳气体的方法，该元素通过将氧化锡，三氧化锑和铂以原子比Sb / Sn = at 至少0.005，Pt / Sn =至少0.004，Sb / Pt = 0.005以上，并在至少625℃的温度下烧结所述混合物。
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9.发明授权Magnetic recording medium comprising a magnetic layer containing magnetic powder, an organic dye and a binder having an amino group or ammonium salt group 失效磁性记录介质包括含有磁性粉末的磁性层，有机染料和具有氨基或铵盐基团的粘合剂
公开(公告)号：US5514465A
公开(公告)日：1996-05-07
申请号：US268955
申请日：1994-06-30
申请人： Takashi Handa , Kiminori Tamai
发明人： Takashi Handa , Kiminori Tamai
CPC分类号： G11B5/7013 , G11B5/712 , Y10S428/90 , Y10T428/256 , Y10T428/2982 , Y10T428/2991
摘要： A magnetic layer containing a magnetic powder whose surface is composed mainly of carbon and/or iron carbide and a binder is provided on a non-magnetic substrate, the magnetic layer further contains an organic dye compound having at least one polar group selected from the group consisting of a hydroxyl group, a carboxylic acid group, a sulfonic acid group and a salt thereof, and the binder contains an amino group and/or an ammonium salt group. Due to the improved dispersibility of a magnetic paint, the magnetic recording medium of the invention is improved in surface morphology, magnetic properties, and electromagnetic properties.
摘要翻译： 在非磁性基板上设置包含表面主要由碳和/或碳化铁构成的磁性粉末和粘合剂的磁性层，磁性层还含有具有至少一个极性基团的有机染料化合物，所述极性基团选自 由羟基，羧酸基，磺酸基及其盐组成，并且粘合剂含有氨基和/或铵盐基团。 由于磁性涂料的分散性提高，本发明的磁记录介质的表面形态，磁特性和电磁特性得到改善。
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