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：US20130337992A1

公开(公告)日：2013-12-19

申请号：US13911473

申请日：2013-06-06

Applicant: HOYA CORPORATION

Inventor： Yoshiko KASUGA ,  Kazuo TACHIWANA ,  Hiroaki YANAGITA

IPC: C03C3/062

CPC classification number: C03C3/062 ,  Y10S501/901

Abstract: A method of making a press-moldable glass, including melting starting materials, forming a melt, and annealing a formed glass, wherein the melt has a composition such that, (1) when rapidly cooled to room temperature, it becomes glass that has a scattering coefficient of less than 0.005 cm-1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10-6, and (2) when maintained for three hours at a temperature 10° C. higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 104.5 to 103.5 dPa·s, and then rapidly cooled to room temperature, (3) the resulting glass has (a) a scattering coefficient of at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm-1 or (b) crystals with a volumetric ratio of greater than 10-5. A temperature for annealing is lower than for glass transition.

Abstract translation: 一种制造可压制玻璃的方法，包括熔融起始材料，形成熔体并退火成形的玻璃，其中熔体具有如下组成：（1）当快速冷却至室温时，其变为具有 在波长为400至2500nm的散射系数小于0.005cm -1，或包含体积比小于10-6的晶体，和（2）当在比10℃高10℃的温度下保持3小时时 玻璃化转变温度，在104.5〜103.5dPa·s的粘度下保持10分钟，然后迅速冷却至室温，（3）得到的玻璃的（a）至少一个波长的散射系数为400 到2500nm大于0.01cm -1或（b）体积比大于10-5的晶体。 退火温度低于玻璃化转变温度。

公开(公告)号：US20230139239A1

公开(公告)日：2023-05-04

申请号：US17915688

申请日：2021-03-25

Applicant: HOYA CORPORATION

Inventor： Kazuo TACHIWANA ,  Hideki MUTO

IPC: C03C3/068 ,  C03C4/00

Abstract: A glass (excluding glass used for optical elements selected from the group consisting of lenses and prisms and glass used for optical fibers) has an oxide-basis glass composition based on a mass basis of a SiO2 content of 0 to 25%, a B2O3 content of 0 to 35%, a P2O5 content of 0 to 30%, a total content of SiO2, B2O3, and P2O5 (SiO2+B2O3+P2O5) of 10 to 45%, an Al2O3 content of 0 to 15%, a Li2O content of 0 to 2%, a Na2O content of 0 to 10%, a K2O content of 0 to 10%, a Rb2O content of 0 to 5%, a Cs2O content of 0 to 5%, a total content of Li2O, Na2O, K2O, Rb2O, and Cs2O (Li2O+Na2O+K2O+Rb2O+Cs2O) of 0 to 15%, and has a wetting angle to water of 60° or more.

公开(公告)号：US20150353420A1

公开(公告)日：2015-12-10

申请号：US14760025

申请日：2013-12-19

Applicant: HOYA CORPORATION

Inventor： Kazuo TACHIWANA ,  Teruo YAMASHITA ,  Shigeru HAYASHI ,  Junko AKOJIMA

IPC: C03C23/00 ,  B24B13/00

CPC classification number: C03C23/0075 ,  B24B7/241 ,  B24B13/00

Abstract: Provided is a method for manufacturing an optical element from glass after polishing and in which either or both of a cleaning liquid used in a cleaning step for the glass after polishing and a rinsing liquid used in a rinsing step after the cleaning step are a liquid that inhibits expansion of cracked parts present on the surface of the glass after polishing.

Abstract translation: 提供了一种从抛光后的玻璃制造光学元件的方法，其中在抛光后的玻璃的清洁步骤中使用的清洗液和在清洗步骤之后的漂洗步骤中使用的漂洗液中的任一种或两种是液体， 在抛光后抑制存在于玻璃表面的裂纹部分的膨胀。

公开(公告)号：US20150299029A1

公开(公告)日：2015-10-22

申请号：US14648821

申请日：2013-11-29

Applicant: HOYA CORPORATION

Inventor： Kazuo TACHIWANA ,  Junko AKOJIMA ,  Teruo YAMASHITA

IPC: C03C3/247

CPC classification number: C03C3/247 ,  C03C21/001 ,  C03C23/008 ,  G02B1/00 ,  G02B3/00

Abstract: A glass article includes P, Al, an alkali earth metal, F and O, wherein the content of P and O is greater at the surface side of the glass article than the inner side thereof and the content of the alkali earth metal and F is less at the surface side of the glass article than the inner side thereof.

Abstract translation: 玻璃制品包括P，Al，碱土金属F和O，其中P和O的含量在玻璃制品的表面侧比其内侧大，并且碱土金属和F的含量为 在玻璃制品的表面侧比内侧更少。