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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：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Method and apparatus for surface roughness detection - using a magnetoresistive element 失效用于表面粗糙度检测的方法和装置 - 使用磁阻元件
公开(公告)号：US5640089A
公开(公告)日：1997-06-17
申请号：US526646
申请日：1995-09-11
申请人： Junichi Horikawa , Hisao Kawai
发明人： Junichi Horikawa , Hisao Kawai
IPC分类号： G01B7/00 , G01B7/34 , G01R33/12 , G11B5/00 , G11B5/012 , G11B5/82 , G11B5/84 , G11B27/36 , G11B33/10 , G01N27/72
CPC分类号： G11B5/84 , G01B7/34 , G01R33/1207 , G11B33/10 , G11B5/00 , G11B5/012 , G11B5/82 , G11B2005/001 , G11B27/36
摘要： A magnetoresistive element is used to detect a surface roughness of an object, such as a magnetic recording medium, a photomask blank, a semiconductor wafer, and is assembled into a reproducing head which moves along a surface of the object and which can produce an electric signal related to the surface roughness. The reproducing head may be incorporated with a recording head into a head unit. The head unit can monitor a magnetic characteristic of the magnetic recording medium in addition to detection of the surface roughness, by recording a predetermined signal by the recording head and by reproducing the predetermined signal by the reproducing head.
摘要翻译： 磁阻元件用于检测诸如磁记录介质，光掩模坯料，半导体晶片的物体的表面粗糙度，并被组装成沿着物体的表面移动的再现头，并且可以产生电 信号与表面粗糙度有关。 再现头可以与记录头并入头单元中。 除了检测表面粗糙度之外，头单元还可以通过由记录头记录预定信号并通过再现头再现预定信号来监测磁记录介质的磁特性。
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4.发明授权公开(公告)号：US07357998B2
公开(公告)日：2008-04-15
申请号：US10758035
申请日：2004-01-16
申请人： Kong Kim , Junichi Horikawa
发明人： Kong Kim , Junichi Horikawa
摘要： A disk substrate for a perpendicular magnetic recording medium comprises a disk base member, a soft magnetic layer formed on the disk base member, and a protection layer formed on the soft magnetic layer. The soft magnetic layer and the protection layer are deposited by sputtering. A perpendicular magnetic recording disk comprises the above-mentioned disk substrate and at least a perpendicular magnetic recording layer formed thereon. The perpendicular magnetic recording layer is deposited on the disk substrate by sputtering after the disk substrate is heated.
摘要翻译： 用于垂直磁记录介质的盘基片包括盘基部件，形成在盘基件上的软磁层，以及形成在软磁层上的保护层。 软磁层和保护层通过溅射沉积。 垂直磁记录盘包括上述盘基片和至少形成在其上的垂直磁记录层。 在加热盘基片之后，通过溅射将垂直磁记录层沉积在盘基片上。
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公开(公告)号：US08559131B2
公开(公告)日：2013-10-15
申请号：US13161394
申请日：2011-06-15
申请人： Daisuke Masuda , Chiyo Saito , Junichi Horikawa , Iwao Okamoto
发明人： Daisuke Masuda , Chiyo Saito , Junichi Horikawa , Iwao Okamoto
IPC分类号： G11B5/127
CPC分类号： G11B5/667 , G11B5/012 , G11B2005/0021
摘要： [Problem] A perpendicular magnetic recording medium and a magnetic disk device that are suitable for a shingle recording type are provided.[Solution] The perpendicular magnetic recording medium of the present invention is a perpendicular magnetic recording medium for a shingle recording type having a laminated film including a soft magnetic layer 13 and a main recording layer 16 formed on base 11, the soft magnetic layer 13 having a thickness found from a core width of a magnetic head for recording and reproduction with respect to the perpendicular magnetic recording medium and a track pitch narrower than the core width.
摘要翻译： [问题]提供了适用于瓦楞记录型的垂直磁记录介质和磁盘装置。 [解决方案]本发明的垂直磁记录介质是用于瓦片记录型的垂直磁记录介质，其具有包括形成在基底11上的软磁层13和主记录层16的层叠膜，软磁层13具有 从用于记录和再现相对于垂直磁记录介质的磁头的磁芯宽度发现的厚度和比磁芯宽度窄的轨道间距。
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公开(公告)号：US20120162808A1
公开(公告)日：2012-06-28
申请号：US13161394
申请日：2011-06-15
申请人： Daisuke Masuda , Chiyo Saito , Junichi Horikawa , Iwao Okamoto
发明人： Daisuke Masuda , Chiyo Saito , Junichi Horikawa , Iwao Okamoto
CPC分类号： G11B5/667 , G11B5/012 , G11B2005/0021
摘要： [Problem] A perpendicular magnetic recording medium and a magnetic disk device that are suitable for a shingle recording type are provided.[Solution] The perpendicular magnetic recording medium of the present invention is a perpendicular magnetic recording medium for a shingle recording type having a laminated film including a soft magnetic layer 13 and a main recording layer 16 formed on base 11, the soft magnetic layer 13 having a thickness found from a core width of a magnetic head for recording and reproduction with respect to the perpendicular magnetic recording medium and a track pitch narrower than the core width.
摘要翻译： [问题]提供了适用于瓦楞记录型的垂直磁记录介质和磁盘装置。 [解决方案]本发明的垂直磁记录介质是用于瓦片记录型的垂直磁记录介质，其具有包括形成在基底11上的软磁层13和主记录层16的层叠膜，软磁层13具有 从用于记录和再现相对于垂直磁记录介质的磁头的磁芯宽度发现的厚度和比磁芯宽度窄的轨道间距。
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公开(公告)号：US20050019608A1
公开(公告)日：2005-01-27
申请号：US10898348
申请日：2004-07-26
申请人： Kong Kim , Kinobu Osakabe , Junichi Horikawa
发明人： Kong Kim , Kinobu Osakabe , Junichi Horikawa
CPC分类号： G11B5/667 , G11B5/7325
摘要： In a perpendicular magnetic recording medium which includes a substrate (1) of a nonmagnetic material, first and second nonmagnetic underlayers (4 and 5) formed on the substrate, and a perpendicular magnetic recording layer (6) formed on the first and the second nonmagnetic underlayers, the first nonmagnetic underlayer is made of an amorphous nonmagnetic metal material containing a metal element which forms a face-centered cubic (fcc) crystal structure by a simple substance. The second nonmagnetic underlayer is formed on the first nonmagnetic underlayer in contact with the first nonmagnetic underlayer and made of a nonmagnetic material containing a hexagonal close packed structure. The perpendicular magnetic recording layer is formed on the second nonmagnetic underlayer in contact with the second nonmagnetic layer.
摘要翻译： 在包括非磁性材料的衬底（1）的垂直磁记录介质中，形成在衬底上的第一和第二非磁性底层（4和5）和形成在第一和第二非磁性材料上的垂直磁记录层（6） 底层，第一非磁性底层由含有通过简单物质形成面心立方（fcc）晶体结构的金属元素的非晶非磁性金属材料制成。 第二非磁性底层形成在与第一非磁性底层接触的第一非磁性底层上，并由含有六方密堆积结构的非磁性材料制成。 垂直磁记录层形成在与第二非磁性层接触的第二非磁性底层上。
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8.发明申请Substrate for information recording medium, information recording medium and process for producing information recording medium 有权用于信息记录介质的基板，信息记录介质和用于产生信息记录介质的处理公开(公告)号：US20050079391A1
公开(公告)日：2005-04-14
申请号：US10437430
申请日：2003-05-14
申请人： Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
发明人： Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
IPC分类号： C03C3/062 , C03C3/083 , C03C3/091 , C03C3/093 , C03C3/095 , C03C3/097 , C03C10/04 , G11B5/73 , G11B5/84 , B23K11/24
CPC分类号： C03C3/083 , G11B5/7315 , G11B5/8404
摘要： A substrate for an information recording medium, which is made of a glass or crystallized glass, (1) which has a region that has a spectral light transmittance of 50% or less converted in terms of a thickness of 2 mm in a wavelength range of 2,750 nm to 3,700 nm, (2) which shows a spectral light transmittance of 70% or less converted in terms of a thickness of 2 mm over whole wavelength range of 2,750 nm to 3,700 nm, (3) which contains an infrared absorbent that is a specific metal oxide and is for use in a perpendicular magnetic recording medium, (4) which is to be heated by irradiation with infrared ray and contains more than 200 ppm of water, or (5) which contains an infrared absorbent that is a specific metal oxide and is used as a substrate to support a multi-layered film including an information recording layer to be formed by sputtering after heating by irradiation with infrared ray, an information recording medium comprising a multi-layered film including an information recording layer formed on any one of the above substrates, and a process for producing an information recording medium.
摘要翻译： 1.一种用玻璃或微晶玻璃制成的信息记录介质用基板，其特征在于，具有在波长范围为2mm的光谱透射率为50％以下的区域 2,750nm至3,700nm的光谱透射率（2），（2）表示在2,750nm至3,700nm的整个波长范围内以2mm的厚度转换70％或更小的光谱透光率，（3）包含红外吸收剂 特定的金属氧化物，用于垂直磁记录介质中，（4）将通过红外线照射加热并含有200ppm以上的水，或（5）其中含有特定的红外线吸收剂 金属氧化物，并且用作基板以支持包含通过用红外线照射加热后通过溅射形成的信息记录层的多层膜，信息记录介质包括包含信息记录的多层膜 形成在上述基板上的任何一个上，以及一种信息记录介质的制造方法。
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公开(公告)号：US06670055B2
公开(公告)日：2003-12-30
申请号：US09925573
申请日：2001-08-09
IPC分类号： G11B566
CPC分类号： G11B5/851 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847
摘要： A magnetic recording medium that is high coersive force, hard to receive influence of thermal fluctuation, and brings about a considerable improvement of S/N ratio, and in which at least an underlayer and a magnetic layer are sequentially laminated on a substrate, wherein a pre-coat layer is interposed between said underlayer and said substrate and said pre-coat layer is constructed by sequentially laminating a lower layer containing Ni and P and an upper layer made of a Cr alloy.
摘要翻译： 一种磁性记录介质，其具有高的强力，难以接受热波动的影响，并且导致S / N比的显着提高，并且其中至少底层和磁性层依次层压在基板上，其中 预涂层介于所述底层和所述基材之间，并且所述预涂层通过依次层压含有Ni和P的下层和由Cr合金制成的上层来构造。
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公开(公告)号：US08057926B2
公开(公告)日：2011-11-15
申请号：US12666561
申请日：2008-09-26
IPC分类号： G11B5/66
摘要： The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR. A typical configuration of a perpendicular magnetic recording medium according to the present invention is a perpendicular magnetic recording medium having a magnetic recording layer with a granular structure in which non-magnetic grain boundary portions are formed between magnetic grains that have grown continuously in a columnar shape, wherein the grain boundary portions contain a plurality of kinds of oxides.
摘要翻译： 本发明提供一种能够通过磁记录层中的磁性颗粒的进一步的尺寸减小和隔离来降低噪声的垂直磁记录介质，并且可以通过提高SNR来提高记录密度。 根据本发明的垂直磁记录介质的典型结构是具有具有颗粒结构的磁记录层的垂直磁记录介质，其中在磁性颗粒之间形成非磁性晶界部分，该磁性颗粒连续生长成柱状 其中，晶界部分含有多种氧化物。
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