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    Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk
    1.
    发明授权
    Glass for information recording media substrate, glass substrate for magnetic disk and magnetic disk 有权
    用于信息记录介质基板的玻璃，用于磁盘和磁盘的玻璃基板

    公开(公告)号：US08119268B2

    公开(公告)日：2012-02-21

    申请号：US12881236

    申请日：2010-09-14

    申请人： Tetsuya Nakashima ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    发明人： Tetsuya Nakashima ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    IPC分类号： G11B5/62 ,  C03C3/091 ,  C03C3/087

    CPC分类号： G11B5/7315 ,  C03C3/083 ,  C03C3/085 ,  C03C4/20 ,  Y10T428/31 ,  Y10T428/315

    摘要： To provide a glass for an information recording media substrate, which is excellent in weather resistance.A glass for an information recording media substrate, which comprises, as represented by mol % based on oxide, from 61 to 66% of SiO2, from 11.5 to 17% of Al2O3, from 8 to 16% of Li2O, from 2 to 8% of Na2O, from 2.5 to 8% of K2O, from 0 to 6% of MgO, from 0 to 4% of TiO2 and from 0 to 3% of ZrO2, provided that Al2O3+MgO+TiO2 is at least 12%, and Li2O+Na2O+K2O is from 16 to 23%, wherein in a case of where B2O3 is contained, its content is less than 1%. The above glass for an information recording media substrate, wherein when the glass is left under steam atmosphere at 120° C. at 0.2 MPa for 20 hours, and the amount of Li, the amount of Na and the amount of K, which precipitate on a surface of the glass are represented as CLi, CNa and CK respectively, CNa is at most 0.7 nmol/cm2, and CLi+CNa+CK is at most 3.5 nmol/cm2.

    摘要翻译： 提供耐候性优异的信息记录介质基板用玻璃。 用于信息记录介质基板的玻璃，其以氧化物的摩尔％表示，SiO 2的61至66％，Al 2 O 3的11.5至17％，Li 2 O的8至16％，2至8重量％ 的Na 2 O，2.5〜8％的K 2 O，0〜6％的MgO，0〜4％的TiO 2和0〜3％的ZrO 2，条件是Al 2 O 3 + MgO + TiO 2为至少12％，Li 2 O + Na 2 O + K 2 O为16〜23％，其中，在含有B 2 O 3的情况下，其含量小于1％。 上述用于信息记录介质基板的玻璃，其中当玻璃在蒸气气氛中在120℃下在0.2MPa下放置20小时时，并且Li的量，Na的量和沉淀的K的量 玻璃的表面分别表示为CLi，CNa和CK，CNa为0.7nmol / cm 2以下，CLi + CNa + CK为3.5nmol / cm 3以下。

    Method for polishing glass substrate and process for producing glass substrate
    3.
    发明授权
    Method for polishing glass substrate and process for producing glass substrate 失效
    玻璃基板的研磨方法及玻璃基板的制造方法

    公开(公告)号：US07959493B2

    公开(公告)日：2011-06-14

    申请号：US12609247

    申请日：2009-10-30

    申请人： Mitsuru Horie ,  Hiroyuki Tomonaga ,  Masabumi Ito ,  Noriaki Shimodaira

    发明人： Mitsuru Horie ,  Hiroyuki Tomonaga ,  Masabumi Ito ,  Noriaki Shimodaira

    IPC分类号： B24B1/00

    CPC分类号： G11B5/8404 ,  B24B37/042

    摘要： Spots generated on a glass substrate after a polishing step are reduced. The present invention relates to a method for polishing a glass substrate including injecting a silica abrasive and a high-boiling solvent in a final glass substrate polishing step. The high-boiling solvent is preferably a solvent having a molecular weight of 300 or lower and a boiling point of 150° C. or higher. As Examples of the high-boiling solvent having a molecular weight of 300 or lower and a boiling point of 150° C. or higher includes ethylene glycol, propylene glycol and glycerine.

    摘要翻译： 在抛光步骤之后在玻璃基板上产生的斑点减小。 本发明涉及一种用于抛光玻璃基板的方法，包括在最后的玻璃基板研磨步骤中注入二氧化硅研磨剂和高沸点溶剂。 高沸点溶剂优选分子量为300以下，沸点为150℃以上的溶剂。 分子量为300以下，沸点为150℃以上的高沸点溶剂的实例包括乙二醇，丙二醇和甘油。

    GLASS FOR INFORMATION RECORDING MEDIA SUBSTRATE, GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK
    5.
    发明申请
    GLASS FOR INFORMATION RECORDING MEDIA SUBSTRATE, GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK 有权
    信息记录介质基板玻璃，磁盘和磁盘的玻璃基板

    公开(公告)号：US20100330396A1

    公开(公告)日：2010-12-30

    申请号：US12881236

    申请日：2010-09-14

    申请人： Tetsuya NAKASHIMA ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    发明人： Tetsuya NAKASHIMA ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    IPC分类号： G11B5/62

    CPC分类号： G11B5/7315 ,  C03C3/083 ,  C03C3/085 ,  C03C4/20 ,  Y10T428/31 ,  Y10T428/315

    摘要： To provide a glass for an information recording media substrate, which is excellent in weather resistance.A glass for an information recording media substrate, which comprises, as represented by mol % based on oxide, from 61 to 66% of SiO2, from 11.5 to 17% of Al2O3, from 8 to 16% of Li2O, from 2 to 8% of Na2O, from 2.5 to 8% of K2O, from 0 to 6% of MgO, from 0 to 4% of TiO2 and from 0 to 3% of ZrO2, provided that Al2O3+MgO+TiO2 is at least 12%, and Li2O+Na2O+K2O is from 16 to 23%, wherein in a case of where B2O3 is contained, its content is less than 1%. The above glass for an information recording media substrate, wherein when the glass is left under steam atmosphere at 120° C. at 0.2 MPa for 20 hours, and the amount of Li, the amount of Na and the amount of K, which precipitate on a surface of the glass are represented as CLi, CNa and CK respectively, CNa is at most 0.7 nmol/cm2, and CLi+CNa+CK is at most 3.5 nmol/cm2.

    摘要翻译： 提供耐候性优异的信息记录介质基板用玻璃。 用于信息记录介质基板的玻璃，其以氧化物的摩尔％表示，SiO 2的61至66％，Al 2 O 3的11.5至17％，Li 2 O的8至16％，2至8重量％ 的Na 2 O，2.5〜8％的K 2 O，0〜6％的MgO，0〜4％的TiO 2和0〜3％的ZrO 2，条件是Al 2 O 3 + MgO + TiO 2为至少12％，Li 2 O + Na 2 O + K 2 O为16〜23％，其中，在含有B 2 O 3的情况下，其含量小于1％。 上述用于信息记录介质基板的玻璃，其中当玻璃在蒸气气氛中在120℃下在0.2MPa下放置20小时时，并且Li的量，Na的量和沉淀的K的量 玻璃的表面分别表示为CLi，CNa和CK，CNa为0.7nmol / cm 2以下，CLi + CNa + CK为3.5nmol / cm 3以下。

    METHOD FOR POLISHING GLASS SUBSTRATE AND PROCESS FOR PRODUCING GLASS SUBSTRATE
    6.
    发明申请
    METHOD FOR POLISHING GLASS SUBSTRATE AND PROCESS FOR PRODUCING GLASS SUBSTRATE 失效
    抛光玻璃基板的方法和生产玻璃基板的方法

    公开(公告)号：US20100048375A1

    公开(公告)日：2010-02-25

    申请号：US12609247

    申请日：2009-10-30

    申请人： Mitsuru HORIE ,  Hiroyuki TOMONAGA ,  Masabumi ITO ,  Noriaki SHIMODAIRA

    发明人： Mitsuru HORIE ,  Hiroyuki TOMONAGA ,  Masabumi ITO ,  Noriaki SHIMODAIRA

    IPC分类号： B24B7/24 ,  C03C3/00 ,  B24B7/17

    CPC分类号： G11B5/8404 ,  B24B37/042

    摘要： Spots generated on a glass substrate after a polishing step are reduced. The present invention relates to a method for polishing a glass substrate including injecting a silica abrasive and a high-boiling solvent in a final glass substrate polishing step. The high-boiling solvent is preferably a solvent having a molecular weight of 300 or lower and a boiling point of 150° C. or higher. As Examples of the high-boiling solvent having a molecular weight of 300 or lower and a boiling point of 150° C. or higher includes ethylene glycol, propylene glycol and glycerine.

    摘要翻译： 在抛光步骤之后在玻璃基板上产生的斑点减小。 本发明涉及一种用于抛光玻璃基板的方法，包括在最后的玻璃基板研磨步骤中注入二氧化硅研磨剂和高沸点溶剂。 高沸点溶剂优选分子量为300以下，沸点为150℃以上的溶剂。 分子量为300以下，沸点为150℃以上的高沸点溶剂的实例包括乙二醇，丙二醇和甘油。

    GLASS FOR INFORMATION RECORDING MEDIA SUBSTRATE, GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK
    8.
    发明申请
    GLASS FOR INFORMATION RECORDING MEDIA SUBSTRATE, GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK 失效
    信息记录介质基板玻璃，磁盘和磁盘的玻璃基板

    公开(公告)号：US20090110963A1

    公开(公告)日：2009-04-30

    申请号：US12256172

    申请日：2008-10-22

    申请人： Tetsuya NAKASHIMA ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    发明人： Tetsuya NAKASHIMA ,  Kei Maeda ,  Noriaki Shimodaira ,  Atsuyoshi Takenaka

    IPC分类号： G11B5/73 ,  C03C3/093 ,  C03C3/091 ,  C03C3/085 ,  C03C3/087

    CPC分类号： G11B5/7315 ,  C03C3/083 ,  C03C3/085 ,  C03C4/20 ,  Y10T428/31 ,  Y10T428/315

    摘要： To provide a glass for an information recording media substrate, which is excellent in weather resistance.A glass for an information recording media substrate, which comprises, as represented by mol % based on oxide, from 61 to 66% of SiO2, from 11.5 to 17% of Al2O3, from 8 to 16% of Li2O, from 2 to 8% of Na2O, from 2.5 to 8% of K2O, from 0 to 6% of MgO, from 0 to 4% of TiO2 and from 0 to 3% of ZrO2, provided that Al2O3+MgO+TiO2 is at least 12%, and Li2O+Na2O+K2O is from 16 to 23%, wherein in a case of where B2O3 is contained, its content is less than 1%. The above glass for an information recording media substrate, wherein when the glass is left under steam atmosphere at 120° C. at 0.2 MPa for 20 hours, and the amount of Li, the amount of Na and the amount of K, which precipitate on a surface of the glass are represented as CLi, CNa and CK respectively, CNa is at most 0.7 nmol/cm2, and CLi+CNa+CK is at most 3.5 nmol/cm2.

    摘要翻译： 提供耐候性优异的信息记录介质基板用玻璃。 用于信息记录介质基板的玻璃，其以氧化物的摩尔％表示，SiO 2的61至66％，Al 2 O 3的11.5至17％，Li 2 O的8至16％，2至8重量％ 的Na 2 O，2.5〜8％的K 2 O，0〜6％的MgO，0〜4％的TiO 2和0〜3％的ZrO 2，条件是Al 2 O 3 + MgO + TiO 2为至少12％，Li 2 O + Na 2 O + K 2 O为16〜23％，其中，在含有B 2 O 3的情况下，其含量小于1％。 上述用于信息记录介质基板的玻璃，其中当玻璃在蒸气气氛中在120℃下在0.2MPa下放置20小时时，并且Li的量，Na的量和沉淀的K的量 玻璃的表面分别表示为CLi，CNa和CK，CNa为0.7nmol / cm 2以下，CLi + CNa + CK为3.5nmol / cm 3以下。

    Wavelength-selective diffraction element and an optical head device
    9.
    发明授权
    Wavelength-selective diffraction element and an optical head device 有权
    波长选择性衍射元件和光学头装置

    公开(公告)号：US06891147B2

    公开(公告)日：2005-05-10

    申请号：US10639507

    申请日：2003-08-13

    申请人： Ryuichiro Goto ,  Hiroki Hotaka ,  Yoshiharu Ooi ,  Reiko Nozawa ,  Noriaki Shimodaira ,  Ryota Murakami

    发明人： Ryuichiro Goto ,  Hiroki Hotaka ,  Yoshiharu Ooi ,  Reiko Nozawa ,  Noriaki Shimodaira ,  Ryota Murakami

    IPC分类号： G11B7/1353 ,  G02B5/18 ,  G02B5/20 ,  G02B27/10 ,  G11B7/00 ,  G11B7/09 ,  G11B11/00

    CPC分类号： G11B7/1353 ,  G02B5/1866 ,  G02B5/203 ,  G02B27/1006 ,  G02B27/1086 ,  G02B27/144 ,  G02B27/145 ,  G11B7/127 ,  G11B2007/0006

    摘要： An optical head device having an optical element capable of transmitting without diffracting light having a wavelength emitted from a two-wavelength semiconductor laser and capable of diffracting light having another wavelength, to provide high utilization efficiency of light in a stable manner.For this purpose, a wavelength-selective diffraction element 1A comprising a transparent substrate having a front surface on which a grating having a periodically recessed and projected shape in cross section is formed and a filling member 13A filled in the concavo-convex portion 12A of the grating wherein the concavo-convex portion of the grating is provided with an organic pigment having the absorption edge of light in a region having a shorter wavelength than the wavelength λ1, and the concavo-convex member and the filling member have the same refractive index with respect to either one of light having a wavelength λ1 and light having a wavelength λ2, and they have different refractive indices with respect to the other light having a wavelength, is disposed between the light source and the objective lens of the optical head device.

    摘要翻译： 一种具有光学元件的光学头装置，其能够在不衍射具有从双波长半导体激光器发射的波长的光并且能够衍射具有另一波长的光的情况下传输，从而以稳定的方式提供高的光的利用效率。 为此目的，一种波长选择性衍射元件1A，其包括具有前表面的透明基板，其上形成有横截面为周期性凹凸形状的光栅;填充部件13A，其填充在凹凸部12中 A的光栅，其中光栅的凹凸部分设置有在波长比波长λ1更短的区域中具有光的吸收边的有机颜料，并且凹凸 构件和填充构件相对于具有波长λ1的光和具有波长λ2的光的任一个具有相同的折射率，并且它们具有不同的折射率 相对于具有波长的其他光，设置在光学头与光学头装置的物镜之间。