公开(公告)号：US20140302346A1

公开(公告)日：2014-10-09

申请号：US14306675

申请日：2014-06-17

Applicant: HOYA CORPORATION

Inventor： Kazuo TACHIWANA ,  Yoichi HACHITANI ,  Xuelu ZOU ,  Mikio IKENISHI ,  Kinobu OSAKABE

IPC: G11B5/735 ,  C03C3/087

CPC classification number: G11B5/735 ,  C03C3/083 ,  C03C3/087 ,  C03C3/095 ,  C03C3/097 ,  C03C15/00 ,  C03C19/00 ,  C03C21/002 ,  C03C23/0075 ,  G11B5/7315 ,  G11B5/82 ,  G11B5/8404 ,  Y10T428/24273 ,  Y10T428/315

Abstract: According to one aspect of the present invention, provided is glass for use in substrate for information recording medium, which comprises, denoted as molar percentages, a total of 70 to 85 percent of SiO2 and Al2O3, where SiO2 content is equal to or greater than 50 percent and Al2O3 content is equal to or greater than 3 percent; a total of equal to or greater than 10 percent of Li2O, Na2O and K2O; a total of 1 to 6 percent of CaO and MgO, where CaO content is greater than MgO content; a total of greater than 0 percent but equal to or lower than 4 percent of ZrO2, HfO2, Nb2O5, Ta2O5, La2O3 Y2O3 and TiO2; with the molar ratio of the total content of Li2O, Na2O and K2O to the total content of SiO2, Al2O3, ZrO2, HfO2, Nb2O5, Ta2O5, La2O3, Y2O3 and TiO2 ((Li2O+Na2O+K2O)/(SiO2+Al2O3+ZrO2+HfO2+Nb2O5+Ta2O5+La2O3+Y2O3+TiO2)) being equal to or less than 0.28. Further provided are the substrate for information recording medium, information recording medium and their manufacturing methods according to the present invention.

Abstract translation: 根据本发明的一个方面，提供了一种用于信息记录介质的基板的玻璃，其包括以摩尔百分数表示的总和为70〜85％的SiO 2和Al 2 O 3，其中SiO 2含量等于或大于 50％，Al2O3含量等于或大于3％; 总计等于或大于10％的Li2O，Na2O和K2O; CaO和MgO的总量为1〜6％，其中CaO含量大于MgO含量; 总共大于0％但等于或低于ZrO2，HfO2，Nb2O5，Ta2O5，La2O3 Y2O3和TiO2的4％; 其中Li2O，Na2O和K2O的总含量与SiO2，Al2O3，ZrO2，HfO2，Nb2O5，Ta2O5，La2O3，Y2O3和TiO2（（Li2O + Na2O + K2O）/（SiO2 + Al2O3 + ZrO 2 + HfO 2 + Nb 2 O 5 + Ta 2 O 5 + La 2 O 3 + Y 2 O 3 + TiO 2））等于或小于0.28。 还提供了根据本发明的用于信息记录介质的基板，信息记录介质及其制造方法。

公开(公告)号：US20230250016A1

公开(公告)日：2023-08-10

申请号：US17608873

申请日：2020-04-30

Applicant: HOYA CORPORATION

Inventor： Mikio IKENISHI ,  Yoshitake TANNO

IPC: C03C23/00 ,  C03C3/21 ,  C03C17/09

CPC classification number: C03C23/007 ,  C03C3/21 ,  C03C17/09 ,  G02B5/003

Abstract: [Problem] To provide glass having a colored layer.
[Solution] Glass having a colored layer.

公开(公告)号：US20230348313A1

公开(公告)日：2023-11-02

申请号：US18127903

申请日：2023-03-29

Applicant: HOYA CORPORATION

Inventor： Mikio IKENISHI

IPC: C03B33/06 ,  C03C27/10 ,  C03B23/207

CPC classification number: C03B33/06 ,  C03B23/207 ,  C03C27/10

Abstract: The glass substrate having opposing flat two main surfaces includes a plurality of optically homogeneous glass pieces joined with one another, in which a junction surface between the joined glass pieces is perpendicular or substantially perpendicular with respect to the two main surfaces.

公开(公告)号：US20200227087A1

公开(公告)日：2020-07-16

申请号：US16641399

申请日：2019-01-31

Applicant: HOYA CORPORATION

Inventor： Shinji EDA ,  Kinobu OSAKABE ,  Yoshitake TANNO ,  Mikio IKENISHI

IPC: G11B17/32 ,  G11B5/73 ,  G11B33/12 ,  G11B17/038

Abstract: A glass material of a glass spacer has a surface resistivity of 103 to 109 [Ω/sq] at 22 [° C.]. The surface resistivity of a surface of the glass material of the glass spacer at 22 [° C.] is lower than the surface resistivity of an inner portion of the glass material at 22 [° C.]. The glass spacer contains at least one oxide selected from the group consisting of TiO2, Nb2O5, WO3, and Bi2O3, as a glass component.

公开(公告)号：US20230202917A1

公开(公告)日：2023-06-29

申请号：US18089069

申请日：2022-12-27

Applicant: HOYA CORPORATION

Inventor： Yoshitake TANNO ,  Mikio IKENISHI

IPC: C03C23/00 ,  C03C3/21 ,  G02B1/00

CPC classification number: C03C23/00 ,  C03C3/21 ,  G02B1/00

Abstract: Glass comprising a colored layer, wherein the glass contains one or more glass components selected from the group consisting of Sb ions, As ions, Sn ions, and Ce ions in an amount of 0.075 cation % or more.

公开(公告)号：US20240361512A1

公开(公告)日：2024-10-31

申请号：US18616714

申请日：2024-03-26

Applicant: HOYA CORPORATION

Inventor： Mikio IKENISHI ,  Itaru WATANABE

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0065 ,  G02B6/0016 ,  G02B27/0172 ,  G02B2027/0178

Abstract: A glass wafer for manufacturing a light guide plate, the glass wafer including: a glass part in a thin sheet shape; and a diffractive optical element part on two main surfaces of the glass part, in which one main surface of the glass part has an area of 1950 mm2 or greater, the glass part has a thickness of 3.0 mm or less, and the glass part has a Young's modulus of 100 GPa or greater.

公开(公告)号：US20210264946A1

公开(公告)日：2021-08-26

申请号：US17315109

申请日：2021-05-07

Applicant: HOYA CORPORATION

Inventor： Shinji EDA ,  Kinobu OSAKABE ,  Yoshitake TANNO ,  Mikio IKENISHI

IPC: G11B17/32 ,  G11B5/73 ,  G11B17/038 ,  G11B33/12

Abstract: A ring shaped glass spacer is configured to be arranged in contact with a magnetic disk in a hard disk drive apparatus. A surface resistivity of a surface of a glass material of the glass spacer at 22 (° C.) is lower than a surface resistivity of an inner portion of the glass material at 22 (° C.).