公开(公告)号：US20040242398A1

公开(公告)日：2004-12-02

申请号：US10633893

申请日：2003-08-04

申请人： MINOLTA CO., LTD.

发明人： Toshiharu Mori ,  Hideki Kawai

IPC分类号： C03C003/083 ,  C03C003/091

CPC分类号： C03C3/083 ,  C03C3/091

摘要： A glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD or of an optical communication device, and a glass composition for making such a glass substrate, contains the following glass ingredients: 45 to 75% by weight of SiO2; 1 to 20% by weight of Al2O3; 0 to 8% by weight, zero inclusive, of B2O3; SiO2nullAl2O3nullB2O3 accounting for 60 to 90% by weight; a total of 0 to 20% by weight, zero inclusive, of R2O compounds, where RnullLi, Na, and K; and a total of 0 to 15% by weight, zero inclusive, of TiO2nullZrO2nullLnxOy, where LnxOy represents at least one compound selected from the group consisting of lanthanoid metal oxides, Y2O3, Nb2O5, and Ta2O5.

摘要翻译： 用作诸如磁盘，磁光盘，DVD或MD或光通信装置的信息记录介质的基板的玻璃基板和用于制造这种玻璃基板的玻璃组合物包含以下玻璃 成分：45〜75重量％的SiO 2; 1〜20重量％的Al 2 O 3; 0〜8重量％，包括零值的B 2 O 3; SiO2 + Al2O3 + B2O3占60〜90重量％; 总共0至20重量％，包括0的R 2 O化合物，其中R = Li，Na和K; 总共为0〜15重量％，包括0的TiO 2 + ZrO 2 + Lnx O y，其中LnxOy表示选自镧系金属氧化物，Y2O3，Nb2O5和Ta2O5中的至少一种化合物。

公开(公告)号：US20040214047A1

公开(公告)日：2004-10-28

申请号：US10852286

申请日：2004-05-25

申请人： MINOLTA CO., LTD.

发明人： Hideki Kawai

IPC分类号： C03C003/093

CPC分类号： G11B5/7315 ,  C03C3/093 ,  C03C3/095 ,  G11B5/8404 ,  Y10T428/218

摘要： A glass material for a substrate, or a glass substrate, consists essentially of the following glass ingredients: from 45 to 70 wt % of SiO2, from 1 to 10 wt % of Al2O3, from 0.5 to 8 wt % of B2O3, from 7 to 20 wt % of Li2OnullNa2OnullK2O, from 0.1 to 10 wt % of MgO, from 0.1 to 10 wt % of CaO, from 1 to 15 wt % of MgOnullCaO, from 0.5 to 10 wt % of TiO2, from 0.5 to 10 wt % of ZrO2, from 0 to 5 wt % of ZnO, and from 0 to 8 wt % of La2O3. The glass material, or the glass substrate, has uniform composition between at the surface and in the interior and has an amorphous structure. With this design, it is possible to obtain high mechanical strength without strengthening treatment, a linear thermal expansion coefficient close to motor components, and excellent chemical durability.

摘要翻译： 用于基材或玻璃基材的玻璃材料基本上由以下玻璃成分组成：45至70重量％的SiO 2，1至10重量％的Al 2 O 3，0.5至8重量％的B 2 O 3，7至 20重量％的Li 2 O + Na 2 O + K 2 O，0.1〜10重量％的MgO，0.1〜10重量％的CaO，1〜15重量％的MgO + CaO，0.5〜10重量％的TiO 2，0.5 至10重量％的ZrO 2，0至5重量％的ZnO和0至8重量％的La 2 O 3。 玻璃材料或玻璃基底在表面和内部之间具有均匀的组成并具有无定形结构。 通过这种设计，可以在不加强处理，靠近电动机部件的线性热膨胀系数和优异的化学耐久性的情况下获得高机械强度。

公开(公告)号：US20040194508A1

公开(公告)日：2004-10-07

申请号：US10825178

申请日：2004-04-16

申请人： MINOLTA CO., LTD.

发明人： Shiro Nishimoto ,  Mitsugu Tokunaga ,  Hideki Kawai ,  Toshiharu Mori ,  Shinji Fukumoto

IPC分类号： C03B032/02

CPC分类号： C03C19/00 ,  C03B11/088 ,  C03B32/02 ,  C03B2215/44 ,  C03B2215/45 ,  C03B2215/50 ,  C03C10/0027 ,  C03C10/0045 ,  C03C23/0075 ,  Y02P40/57

摘要： The present invention relates to a glass substrate of which the outer periphery portion is unprocessed. The present invention also relates to a manufacturing method for a glass substrate of which the outer periphery portion is unprocessed, characterized in that a first lapping process, a second lapping process, a polishing process and a washing process are carried out after a press molding process is carried out so as to compress glass between an upper mold and a lower mold without regulating the edge surface of the outer periphery portion of the glass and, then, a crystallization process or an annealing process is carried out.

摘要翻译： 本发明涉及一种其外周部未进行处理的玻璃基板。 本发明还涉及一种其外周部未进行处理的玻璃基板的制造方法，其特征在于，在压制成型工序之后进行第一研磨处理，第二研磨处理，研磨处理和洗涤处理 进行，以便在不调节玻璃的外周部分的边缘表面的同时在上模和下模之间压缩玻璃，然后进行结晶处理或退火处理。

公开(公告)号：US20040063564A1

公开(公告)日：2004-04-01

申请号：US10460908

申请日：2003-06-13

申请人： MINOLTA CO., LTD.

发明人： Hideki Kawai ,  Toshiharu Mori

IPC分类号： C03C003/083 ,  C03C003/085 ,  C03C003/091

CPC分类号： G11B5/7315 ,  C03C3/083

摘要： A glass substrate for use as the substrate of an information recording medium such as a magnetic disk, magneto-optical disk, DVD, or MD or of an optical communication device, and a glass composition for making such a glass substrate, contains the following glass ingredients: 45 to 75% by weight of SiO2; 1 to 20% by weight of Al2O3; 0 to 15% by weight, zero inclusive, of B2O3; SiO2nullAl2O3nullB2O3 accounting for 65 to 90% by weight; a total of 7 to 20% by weight of R2O compounds, where RnullLi, Na, and K; and a total of 0 to 12% by weight, zero inclusive, of RnullO compounds, where RnullnullMg, Ca, Sr, Ba, and Zn. Moreover, the following conditions are fulfilled: B2O3null0% by weight, or Al2O3/B2O3null1.0; and (SiO2nullAl2O3nullB2O3)/(the total of R2O compoundsnullthe total of R2O compounds)null3.

摘要翻译： 用作诸如磁盘，磁光盘，DVD或MD或光通信装置的信息记录介质的基板的玻璃基板和用于制造这种玻璃基板的玻璃组合物包含以下玻璃 成分：45〜75重量％的SiO 2; 1〜20重量％的Al 2 O 3; 0〜15重量％，包括零值的B2O3; SiO 2 + Al 2 O 3 + B 2 O 3占65〜90重量％。 总共7〜20重量％的R 2 O化合物，其中R = Li，Na和K; 和0〜12重量％，包括0的R'O化合物，其中R'= Mg，Ca，Sr，Ba和Zn。 此外，满足以下条件：B 2 O 3 = 0重量％，或Al 2 O 3 / B 2 O 3 = 1.0; 和（SiO 2 + Al 2 O 3 + B 2 O 3）/（R2O化合物的总和+ R2O化合物的总和）> = 3。