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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
Applicant: Kenji Ayama , Tokichiro Sato , Teiichiro Umezawa , Masafumi Ishiyama , Junichi Horikawa
Inventor： Kenji Ayama , Tokichiro Sato , Teiichiro Umezawa , Masafumi Ishiyama , Junichi Horikawa
IPC: G11B5/66
Abstract: 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.
Abstract translation: 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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2.发明申请公开(公告)号：US20110111262A1
公开(公告)日：2011-05-12
申请号：US12934975
申请日：2009-03-25
Applicant: Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
Inventor： Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
Abstract: An object of the present invention is to provide a method of manufacturing a perpendicular magnetic recording medium (100) in which both of a coercive force Hc and reliability can be achieved at a higher level even with heating at the time of forming a medium protective layer (126) and to provide the perpendicular magnetic recording medium (100). Thus, in a typical structure of the present invention, in the method of manufacturing the perpendicular magnetic recording medium (100) including at least a magnetic recording layer (122b), which is a ferromagnetic layer of a granular structure in which a non-magnetic grain boundary part is formed between crystal grains each grown in a columnar shape, and a medium protective layer (126) with carbon hydride as a main component in this order on a disk base (110), the method includes a magnetic recording layer forming step of forming the magnetic recording layer (122b) so that the grain boundary part contains oxides of a plurality of types and a medium protective layer forming step of forming the medium protective layer (126) in a state where the disk base (110) having the magnetic recording layer (122b) formed thereon is heated at 160 to 200 degrees Celsius.
Abstract translation: 本发明的目的是提供一种制造垂直磁记录介质（100）的方法，其中即使在形成介质保护层时加热也可以在更高的水平上实现矫顽力Hc和可靠性 （126）并提供垂直磁记录介质（100）。 因此，在本发明的典型结构中，在制造至少包括磁记录层（122b）的垂直磁记录介质（100）的制造方法中，所述磁记录层是粒状结构的铁磁层，其中非磁性 在圆盘基体（110）上依次形成以圆柱状生长的晶粒和碳氢化合物作为主要成分的介质保护层（126）之间的晶界部分，该方法包括磁记录层形成步骤 形成磁记录层（122b），使得晶界部分包含多种类型的氧化物和形成介质保护层（126）的介质保护层形成步骤，所述介质保护层形成步骤处于具有 在其上形成的磁记录层（122b）在160至200摄氏度下被加热。
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3.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：US20070160877A1
公开(公告)日：2007-07-12
申请号：US11711669
申请日：2007-02-28
Applicant: Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
Inventor： Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
CPC classification number: C03C3/083 , G11B5/7315 , G11B5/8404
Abstract: 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.
Abstract translation: 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：US06287429B1
公开(公告)日：2001-09-11
申请号：US09312162
申请日：1999-05-14
Applicant: Keiji Moroishi , Junichi Horikawa , Masato Kobayashi , Osamu Nozawa
Inventor： Keiji Moroishi , Junichi Horikawa , Masato Kobayashi , Osamu Nozawa
IPC: C23C1434
CPC classification number: C23C14/3414
Abstract: 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.
Abstract translation: 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：US5954927A
公开(公告)日：1999-09-21
申请号：US917112
申请日：1997-08-25
Applicant: Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
Inventor： Masato Kobayashi , Osamu Nozawa , Hisao Kawai , Keiji Moroishi , Takashi Sato , Junichi Horikawa
CPC classification number: G11B5/7325 , G11B5/66 , G11B5/851
Abstract: 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.
Abstract translation: 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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Patent Agency Ranking6.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
Applicant: Junichi Horikawa , Hisao Kawai
Inventor： Junichi Horikawa , Hisao Kawai
IPC: G01B7/00 , G01B7/34 , G01R33/12 , G11B5/00 , G11B5/012 , G11B5/82 , G11B5/84 , G11B27/36 , G11B33/10 , G01N27/72
CPC classification number: G11B5/84 , G01B7/34 , G01R33/1207 , G11B33/10 , G11B5/00 , G11B5/012 , G11B5/82 , G11B2005/001 , G11B27/36
Abstract: 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.
Abstract translation: 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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7.发明授权公开(公告)号：US08623528B2
公开(公告)日：2014-01-07
申请号：US12934975
申请日：2009-03-25
Applicant: Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
Inventor： Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
IPC: G11B5/66
Abstract: An object of the present invention is to provide a method of manufacturing a perpendicular magnetic recording medium (100) in which both of a coercive force Hc and reliability can be achieved at a higher level even with heating at the time of forming a medium protective layer (126) and to provide the perpendicular magnetic recording medium (100). Thus, in a typical structure of the present invention, in the method of manufacturing the perpendicular magnetic recording medium (100) including at least a magnetic recording layer (122b), which is a ferromagnetic layer of a granular structure in which a non-magnetic grain boundary part is formed between crystal grains each grown in a columnar shape, and a medium protective layer (126) with carbon hydride as a main component in this order on a disk base (110), the method includes a magnetic recording layer forming step of forming the magnetic recording layer (122b) so that the grain boundary part contains oxides of a plurality of types and a medium protective layer forming step of forming the medium protective layer (126) in a state where the disk base (110) having the magnetic recording layer (122b) formed thereon is heated at 160 to 200 degrees Celsius.
Abstract translation: 本发明的目的是提供一种制造垂直磁记录介质（100）的方法，其中即使在形成介质保护层时加热也可以在更高的水平上实现矫顽力Hc和可靠性 （126）并提供垂直磁记录介质（100）。 因此，在本发明的典型结构中，在制造至少包括磁记录层（122b）的垂直磁记录介质（100）的制造方法中，所述磁记录层是粒状结构的铁磁层，其中非磁性 在圆盘基体（110）上依次形成以圆柱状生长的晶粒和碳氢化合物作为主要成分的介质保护层（126）之间的晶界部分，该方法包括磁记录层形成步骤 形成磁记录层（122b），使得晶界部分包含多种类型的氧化物和形成介质保护层（126）的介质保护层形成步骤，所述介质保护层形成步骤处于具有 在其上形成的磁记录层（122b）在160至200摄氏度下被加热。
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公开(公告)号：US07993765B2
公开(公告)日：2011-08-09
申请号：US10898348
申请日：2004-07-26
Applicant: Kong Kim , Kinobu Osakabe , Junichi Horikawa
Inventor： Kong Kim , Kinobu Osakabe , Junichi Horikawa
CPC classification number: G11B5/667 , G11B5/7325
Abstract: 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.
Abstract translation: 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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9.发明授权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：US07972662B2
公开(公告)日：2011-07-05
申请号：US11711669
申请日：2007-02-28
Applicant: Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
Inventor： Mikio Ikenishi , Xuelu Zou , Kenji Yamanaka , Junichi Horikawa
CPC classification number: C03C3/083 , G11B5/7315 , G11B5/8404
Abstract: An information recording medium is prepared by forming a multi-layered film, including an information recording layer, on a substrate by transferring the substrate heated at an average heating rate of at least 10° C./second in a heating zone, along consecutive film-forming zones, and consecutively forming layers forming the multi-layered film in the film-forming zones.
Abstract translation: 通过在基板上形成包含信息记录层的多层膜，通过在加热区中以平均加热速度至少10℃/秒加热的基板沿着连续的膜转移来制备信息记录介质 并且在成膜区域中连续形成形成多层膜的层。
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公开(公告)号：US20100215992A1
公开(公告)日：2010-08-26
申请号：US12709845
申请日：2010-02-22
Applicant: Junichi HORIKAWA , Kenji AYAMA , Masafumi ISHIYAMA , Toshikatsu YAMAGUCHI , Yusuke SETO
Inventor： Junichi HORIKAWA , Kenji AYAMA , Masafumi ISHIYAMA , Toshikatsu YAMAGUCHI , Yusuke SETO
IPC: G11B5/706
CPC classification number: G11B5/7325 , G11B5/65
Abstract: A magnetic recording medium used for perpendicular magnetic recording, the magnetic recording medium comprising: a substrate having a first surface and a second surface opposite to the first surface; a magnetic recording medium constituent layer formed on the first surface of the substrate, the magnetic recording medium constituent layer including at least a magnetic recording layer; a non-magnetic metal film formed on the second surface of the substrate; and a carbon-based protective film formed on the non-magnetic metal film.
Abstract translation: 一种用于垂直磁记录的磁记录介质，所述磁记录介质包括：具有第一表面和与所述第一表面相对的第二表面的基底; 形成在所述基板的第一表面上的磁记录介质构成层，所述磁记录介质构成层至少包括磁记录层; 形成在所述基板的第二表面上的非磁性金属膜; 以及形成在非磁性金属膜上的碳类保护膜。
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