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公开(公告)号：US5766727A
公开(公告)日：1998-06-16
申请号：US639168
申请日：1996-04-26
申请人： Keiji Moroishi , Kivoshi Sato , Isao Kawasumi , Hisao Kawai
发明人： Keiji Moroishi , Kivoshi Sato , Isao Kawasumi , Hisao Kawai
IPC分类号： G11B5/82 , G11B5/64 , G11B5/66 , G11B5/72 , G11B5/725 , G11B5/73 , G11B5/738 , G11B5/84 , C23C14/00
CPC分类号： G11B5/7325 , G11B5/72 , G11B5/725 , G11B5/8408 , Y10S428/90 , Y10T428/24355 , Y10T428/265
摘要： According to the present invention, a magnetic recording medium comprises a glass substrate, a first under layer, a second under layer, a magnetic layer, a protective layer and a lubricant layer in the named order. The first under layer is formed on a glass plate, a surface of which is highly polished. The second under layer is formed, on the first under layer, of a material differing from a material of the first under layer, and has a thickness greater than a thickness of the first under layer. The magnetic layer is formed on the second under layer. The protective layer is formed on the magnetic layer, on whose surface a texture due to dispersed hard minute particles appears. The lubricant layer is formed on the protective layer. For such a magnetic recording medium, a property of the material used for the first under layer is that it promotes the crystalline growth of the second under layer, which is formed on the first under layer to support the crystalline growth of the magnetic layer that is deposited on the second under layer; and another property is that it relieves internal stress resulting from a difference in thermal expansion between the second under layer and the glass substrate.
摘要翻译： 根据本发明，磁记录介质按照所述顺序包括玻璃基板，第一下层，第二下层，磁性层，保护层和润滑剂层。 第一底层形成在玻璃板上，其表面被高度抛光。 第二下层在第一下层上形成与第一下层的材料不同的材料，并且具有大于第一下层的厚度的厚度。 磁性层形成在第二下层上。 保护层形成在磁性层上，其表面由于分散的硬微粒子出现纹理。 润滑剂层形成在保护层上。 对于这种磁记录介质，用于第一底层的材料的性质是促进形成在第一下层上的第二下层的结晶生长，以支持磁性层的结晶生长 沉积在第二下层上; 另一个特性就是减轻由于第二下层和玻璃基板之间的热膨胀差引起的内部应力。
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公开(公告)号：US5954927A
公开(公告)日：1999-09-21
申请号：US917112
申请日：1997-08-25
申请人： Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
发明人： Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
CPC分类号： G11B5/7325 , G11B5/66 , G11B5/851
摘要： A method of manufacturing a magnetic recording medium by using an in-line sputtering apparatus to successively form, on a substrate, at least one underlying layer, a first magnetic CoPt-based film, a nonmagnetic intermediate film, and a second magnetic CoPt-based film. The underlying film and/or the nonmagnetic film, which are in contact with the first magnetic film, are deposited at a low sputtering power between 100 and 1000 watts to improve the magnetic properties of the magnetic recording medium. Low power sputtering is also effective to improve the distribution of difference of the crystal lattice spacings between the nonmagnetic intermediate film and the first magnetic film and between the underlying layer and the first magnetic film.
摘要翻译： 一种使用在线溅射装置制造磁记录介质的方法，在衬底上依次形成至少一个下层，第一磁性CoPt基膜，非磁性中间膜和第二磁性CoPt基 电影。 与第一磁性膜接触的下面的薄膜和/或非磁性薄膜以低至1000瓦特的低溅射功率沉积，以提高磁记录介质的磁特性。 低功率溅射对于改善非磁性中间膜和第一磁性膜之间以及下层和第一磁性膜之间的晶格间距的差异的分布也是有效的。
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3.发明授权
公开(公告)号：US5900324A
公开(公告)日：1999-05-04
申请号：US548863
申请日：1995-10-26
申请人： Keiji Moroishi , Takashi Sato , Jun-ichi Horikawa , Masato Kobayashi , Hisao Kawai , Osamu Nozawa
发明人： Keiji Moroishi , Takashi Sato , Jun-ichi Horikawa , Masato Kobayashi , Hisao Kawai , Osamu Nozawa
CPC分类号： G11B5/7325 , G11B5/66 , G11B5/851 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/12632 , Y10T428/12826
摘要： Disclosed are magnetic recording media comprising, on a substrate, two or more CrPt based magnetic layers and one or more CrMo based non-magnetic spacer layers between the magnetic layers and processes for preparation thereof. The magnetic recording media of the present invention include magnetic tapes and magnetic disks. The magnetic recording media are capable of suppressing noise generation upon reproducing recorded signals by employing magnetic layers having a small thickness. The magnetic recorders utilizing the above magnetic recording media are also disclosed.
摘要翻译： 公开了一种磁记录介质，其在基板上包括两个或更多个基于CrPt的磁性层和在磁性层之间的一个或多个CrMo基非磁性间隔层及其制备方法。 本发明的磁记录介质包括磁带和磁盘。 通过采用具有小厚度的磁性层，磁记录介质能够抑制再现记录信号时的噪声产生。 还公开了利用上述磁记录介质的磁记录器。
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公开(公告)号：US5746893A
公开(公告)日：1998-05-05
申请号：US575019
申请日：1995-12-19
申请人： Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
发明人： Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
CPC分类号： G11B5/7325 , G11B5/66 , G11B5/851
摘要： A method of manufacturing a magnetic recording medium by using an in-line sputtering apparatus to successively form, on a substrate, at least one underlying layer, a first magnetic CoPt-based film, a nonmagnetic intermediate film, and a second magnetic CoPt-based film. The underlying film and/or the nonmagnetic film, which are in contact with the first magnetic film, are deposited at a low sputtering power between 100 and 1000 watts to improve the magnetic properties of the magnetic recording medium. Low power sputtering is also effective to improve the distribution of difference of the crystal lattice spacings between the nonmagnetic intermediate film and the first magnetic film and between the underlying layer and the first magnetic film.
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公开(公告)号：US5100869A
公开(公告)日：1992-03-31
申请号：US322156
申请日：1989-03-10
IPC分类号： C01B13/32 , C01G1/00 , C01G3/00 , C01G29/00 , C04B35/45 , C04B35/65 , H01B12/00 , H01B13/00 , H01L39/00 , H01L39/12 , H01L39/24
CPC分类号： H01L39/2419 , C04B35/45 , C04B35/65 , Y10S505/805 , Y10S505/807 , Y10S505/813
摘要： A metal oxide-type superconductive material is produced by a process which comprises a first step of subjecting a powder raw material containing given proportions of metal elements to be contained in said metal oxide-type superconductive material, to mechanical grinding and alloying simultaneously to obtain an alloy powder and a second step of heat-treating the alloy powder in an oxygen-containing gas atmosphere to obtain a metal oxide.The superconductive material obtained has a high density, a low porosity, a high strength and a high critical current density.
摘要翻译： 金属氧化物型超导材料通过包括第一步骤的方法生产，所述第一步骤是将含有给定比例的金属元素的粉末原料包含在所述金属氧化物型超导材料中，同时进行机械研磨和合金化，以获得 合金粉末和在含氧气体气氛中对合金粉末进行热处理以获得金属氧化物的第二步骤。 获得的超导材料具有高密度，低孔隙率，高强度和高临界电流密度。
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公开(公告)号：US20070128471A1
公开(公告)日：2007-06-07
申请号：US11602207
申请日：2006-11-21
申请人： Keiji Moroishi , Ang Chor Boon
发明人： Keiji Moroishi , Ang Chor Boon
CPC分类号： G11B5/7325 , G11B5/8404 , G11B5/851
摘要： In a magnetic disk having at least a glass substrate, a plurality of underlayers formed over the glass substrate, and a magnetic layer formed over the plurality of underlayers, at least one of the underlayers is an amorphous underlayer containing a VIa group element and carbon and, given that the remanent magnetization in a circumferential direction of the disk is Mrc and the remanent magnetization in a radial direction of the disk is Mrr, the magnetic disk has a magnetic anisotropy in which Mrc/Mrr being a ratio between Mrc and Mrr exceeds 1.
摘要翻译： 在至少具有玻璃基板的磁盘中，形成在玻璃基板上的多个底层，以及形成在所述多个底层上的磁性层，所述底层中的至少一个是含有VIa族元素和碳的无定形底层， 考虑到圆盘圆周方向上的残余磁化为Mrc，圆盘的径向的剩余磁化为Mrr，磁盘具有磁性各向异性，其中Mrc / Mrr与Mrc与Mrr之间的比值超过1 。
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公开(公告)号：US06916558B2
公开(公告)日：2005-07-12
申请号：US10778186
申请日：2004-02-17
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325 , Y10T428/24942
摘要： In a magnetic disk having a glass substrate, an amorphous underlayer is formed on the glass substrate. A magnetic layer is formed on the amorphous underlayer. The glass substrate is provided with a texture formed to induce magnetic anisotropy in the magnetic layer. The amorphous underlayer contains a group IVa element on a glass substrate side and a group Va element on a magnetic layer side.
摘要翻译： 在具有玻璃基板的磁盘中，在玻璃基板上形成无定形底层。 在无定形底层上形成磁性层。 玻璃基板具有形成为在磁性层中引起磁各向异性的纹理。 无定形底层包含玻璃基板侧的IVa族元素和磁性层侧的Va族元素。
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公开(公告)号：US06287429B1
公开(公告)日：2001-09-11
申请号：US09312162
申请日：1999-05-14
IPC分类号： C23C1434
CPC分类号： C23C14/3414
摘要： A magnetic recording medium comprises a non-magnetic substrate having a principal surface, an intermediate layer formed on the principal surface, and a magnetic layer formed on the intermediate layer. The intermediate layer comprises an intermediate material composed of chromium and molybdenum. The magnetic layer comprises a magnetic material composed of cobalt and platinum. The intermediate layer may comprise first and second layers. The first layer comprises a first material composed of chromium and is formed on the principal surface. The second layer comprises a second material composed of chromium and molybdenum and is formed on the first layer.
摘要翻译： 磁记录介质包括具有主表面的非磁性基底，在主表面上形成的中间层和形成在中间层上的磁性层。 中间层包括由铬和钼组成的中间材料。 磁性层包括由钴和铂组成的磁性材料。 中间层可以包括第一层和第二层。 第一层包括由铬构成的第一材料并形成在主表面上。 第二层包括由铬和钼组成的第二材料，并形成在第一层上。
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公开(公告)号：US5968679A
公开(公告)日：1999-10-19
申请号：US758015
申请日：1996-11-27
CPC分类号： G11B5/7325 , G11B5/64 , G11B5/656 , G11B5/66 , Y10T428/26 , Y10T428/265
摘要： In a magnetic recording medium having an underlying film of a body-centered-cubic (bcc) CrV-based alloy and a magnetic film of a hexagonal close-packed (hcp) CoPtCr-based alloy deposited on the underlying film, a difference between a crystal lattice plane distance d.sub.(002) of (002) planes in the hcp alloy of the magnetic film and another crystal lattice plane distance d.sub.(110) of (110) planes in the bcc alloy of the nonmagnetic film is given by subtracting d.sub.(110) from d.sub.(002) and falls within a range between 0.002 and 0.032 angstrom. Preferably, the difference d.sub.(002) -d.sub.(110) is present between 0.014 and 0.030 angstrom only a single pair of the underlying film and the magnetic film may be included in the magnetic recording medium or plural pairs of the underlying film and the magnetic film may be included in the magnetic recording medium.
摘要翻译： 在具有体心立方（bcc）CrV基合金的基底膜和沉积在基底膜上的六方密堆积（hcp）CoPtCr基合金的磁性膜的磁记录介质中， 磁性薄膜的hcp合金中的（002）面的晶格平面距离d（002）和非磁性膜的bcc合金中的（110）面的另一个晶格面距离d（110）给出是减去d（ 110），并且落在0.002和0.032埃之间的范围内。 优选地，差d（002）-d（110）仅存在于0.014和0.030埃之间，只有一对下面的膜，并且磁膜可以包括在磁记录介质中或多对下面的膜和磁性 膜可以包括在磁记录介质中。
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公开(公告)号：US5824427A
公开(公告)日：1998-10-20
申请号：US673754
申请日：1996-06-27
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/738 , G11B5/85 , G11B5/851 , H01F10/16 , H01F10/18 , H01F10/30 , C23C14/34 , G11B5/62
CPC分类号： G11B5/7325 , G11B5/656
摘要： A magnetic recording medium comprising a non-magnetic underlayer and a CoPt magnetic layer provided on a substrate in this order wherein the non-magnetic underlayer comprises one or more non-magnetic layers, one of the non-magnetic layers which is in contact with the CoPt magnetic layer consists mainly of Cr and Mo, and difference (d.sub.(002) -d.sub.(110)) obtained by subtracting a crystalline lattice spacing of bcc (110) faces in the non-magnetic layer consisting mainly of Cr and Mo from a crystalline lattice spacing of hcp (002) faces in the magnetic layer falls within a range of from 0.002 to 0.032 .ANG., which shows a high magnetic coercive force and square ratio and a low medium noise, and a method for producing the magnetic recording medium mentioned above wherein at least the non-magnetic layer consisting mainly of Cr and Mo and the CoPt magnetic layer are formed by a sputtering technique using a substrate heating temperature within a range of 250.degree. to 425.degree. C. and an Ar gas pressure within a range of 0.5 to 10 mTorr.
摘要翻译： 一种包括非磁性底层和设置在基板上的CoPt磁性层的磁记录介质，其中非磁性底层包括一个或多个非磁性层，与非磁性层接触的非磁性层之一 CoPt磁性层主要由Cr和Mo组成，并且通过从主要由Cr和Mo组成的非磁性层中减去bcc（110）面的晶格间距而得到的差（d（002）-d（110）） 磁性层中的hcp（002）面的晶格间距在0.002〜0.032的范围内，具有高的矫顽力和平方比以及低的中等噪音，以及提供的磁记录介质的制造方法 其中至少主要由Cr和Mo组成的非磁性层和CoPt磁性层通过使用基板加热温度在250°至425℃范围内的溅射技术形成，并且Ar气体压制 在0.5至10 mTorr的范围内。
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