公开(公告)号：US08603350B2

公开(公告)日：2013-12-10

申请号：US12836238

申请日：2010-07-14

申请人： Naoyuki Goto ,  Toshitaka Yagi ,  Yutaka Yamashita

发明人： Naoyuki Goto ,  Toshitaka Yagi ,  Yutaka Yamashita

IPC分类号： C03C15/02 ,  B24B1/00

CPC分类号： G11B5/8404 ,  B24B37/042 ,  B24B37/08 ,  C03C19/00 ,  G11B5/7315

摘要： A manufacturing method is provided for manufacturing a substrate for information storage media having various properties that are demanded for a next generation of information storage media substrate purposes exemplified by perpendicular magnetic recording systems, etc., and above all, having high fracture toughness and a smooth surface at low cost. The method of manufacturing a substrate for information storage media includes a step of preparing glass material of a plate shape containing SiO2 component, Al2O3 component, and R′2O component, R′ being at least one selected from Li, Na, and K, and the step of lapping includes at least one sub-step of lapping the glass material with a diamond pad.

摘要翻译： 提供一种用于制造用于信息存储介质的基板的制造方法，其具有为垂直磁记录系统等示例的信息存储介质基板目的的下一代所需的各种性能，并且首先具有高断裂韧性和平滑 表面低成本。 制造信息存储介质用基板的方法包括制备含有SiO 2成分，Al 2 O 3成分和R'2O成分的R'为选自Li，Na，K中的至少一种的板状的玻璃材料的工序， 研磨步骤包括用金刚石垫研磨玻璃材料的至少一个子步骤。

公开(公告)号：US08283060B2

公开(公告)日：2012-10-09

申请号：US12792030

申请日：2010-06-02

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： G11B5/73 ,  C03C3/12 ,  C03C3/21 ,  C03B27/012

CPC分类号： C03C10/00 ,  C03C3/095 ,  C03C3/097 ,  C03C21/002 ,  C03C2204/08 ,  G11B5/73 ,  G11B5/7315 ,  G11B5/8404

摘要： To provide a substrate for information recording medium having various properties, in particular higher fracture toughness, required for application of the substrate for information recording medium of the next generation such as perpendicular magnetic recording system, etc. and a material with excellent workability for such purpose. A crystallized glass substrate for information recording medium, consisting of a crystallized glass which comprises one or more selected from RAl2O4 and R2TiO4 as a main crystal phase, in which R is one or more selected from Zn, Mg and Fe, and in which the main crystal phase has a crystal grain size in a range of from 0.5 nm to 20 nm, a degree of crystallinity of 15% or less, and a specific gravity of 3.00 or less.

摘要翻译： 为了提供用于信息记录介质的基板，其具有用于施加下一代信息记录介质的基板（诸如垂直磁记录系统等）所需的各种性能，特别是较高的断裂韧性，以及具有优异的可加工性的材料用于该目的 。 一种用于信息记录介质的结晶玻璃基板，由包含选自由Zr，Mg和Fe中的一种或多种选自Zn，Mg和Fe中的一种或多种的主要结晶相的一种或多种的结晶玻璃组成，其中主要 晶相的晶粒尺寸为0.5nm〜20nm，结晶度为15％以下，比重为3.00以下。

公开(公告)号：US07589038B2

公开(公告)日：2009-09-15

申请号：US11542121

申请日：2006-10-04

申请人： Naoyuki Goto ,  Toshitaka Yagi ,  Takayuki Kishi

发明人： Naoyuki Goto ,  Toshitaka Yagi ,  Takayuki Kishi

IPC分类号： C03C10/04 ,  G11B7/241 ,  C03C10/14

CPC分类号： C03C10/0027 ,  C03C10/0045 ,  H05K1/0306

摘要： The present invention provides an inorganic composition for use in information recording medium disc substrate and such, having an excellent surface property capable of sufficiently corresponding with a ramp load system for high density recording, a high degree of tolerability to high speed rotation, and high productivity at a low melting point. Specifically, this invention provides an inorganic composition containing one crystalline phase selected from the group consisting of α-quartz (α-SiO2), lithium disilicate (Li2Si2O5) and lithium monosilicate (Li2SiO3), or that contain at least a crystalline phase of lithium monosilicate (Li2SiO3), in which a mean particle diameter of a particle showing a crystalline phase contained in the inorganic composition is 1 μm or less, a ring flexural strength is 300 MPa or more, and a surface roughness (an arithmetic mean roughness) thereof after a polishing process is 10 Å or less.

摘要翻译： 本发明提供了一种用于信息记录介质盘基片的无机组合物，具有能够与用于高密度记录的斜坡载荷系统充分相对应的优异的表面性质，高速旋转的高度耐受性和高生产率 在低熔点。 具体地说，本发明提供一种无机组合物，其含有选自α-石英（α-SiO 2），二硅酸锂（Li 2 Si 2 O 5）和单硅酸锂（Li 2 SiO 3）中的一种结晶相，或至少含有单硅酸锂的结晶相 （Li 2 SiO 3），其中显示无机组合物中所含结晶相的粒子的平均粒径为1μm以下，环弯曲强度为300MPa以上，其后表面粗糙度（算术平均粗糙度）为 抛光过程为10埃或更少。

公开(公告)号：US08852764B2

公开(公告)日：2014-10-07

申请号：US13551940

申请日：2012-07-18

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： G11B5/73 ,  C03C3/095 ,  C03C3/097 ,  C03C3/091 ,  C03C3/093 ,  C03C21/00 ,  G11B5/84 ,  C03C10/00

CPC分类号： C03C10/00 ,  C03C3/095 ,  C03C3/097 ,  C03C21/002 ,  C03C2204/08 ,  G11B5/73 ,  G11B5/7315 ,  G11B5/8404

摘要： To provide a substrate for information recording medium having various properties, in particular higher fracture toughness, required for application of the substrate for information recording medium of the next generation such as perpendicular magnetic recording system, etc. and a material with excellent workability for such purpose. A crystallized glass substrate for information recording medium, consisting of a crystallized glass which comprises one or more selected from RAl2O4 and R2TiO4 as a main crystal phase, in which R is one or more selected from Zn, Mg and Fe, and in which the main crystal phase has a crystal grain size in a range of from 0.5 nm to 20 nm, a degree of crystallinity of 15% or less, and a specific gravity of 3.00 or less.

摘要翻译： 为了提供用于信息记录介质的基板，其具有用于施加下一代信息记录介质的基板（诸如垂直磁记录系统等）所需的各种性能，特别是较高的断裂韧性，以及具有优异的可加工性的材料用于该目的 。 一种用于信息记录介质的结晶玻璃基板，由包含选自由Zr，Mg和Fe中的一种或多种选自Zn，Mg和Fe中的一种或多种的主要结晶相的一种或多种的结晶玻璃组成，其中主要 晶相的晶粒尺寸为0.5nm〜20nm，结晶度为15％以下，比重为3.00以下。

公开(公告)号：US08394515B2

公开(公告)日：2013-03-12

申请号：US12710629

申请日：2010-02-23

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： G11B5/73 ,  C03B27/00

CPC分类号： G11B5/8404 ,  C03C3/097 ,  C03C10/0027 ,  C03C21/002 ,  C03C2204/08 ,  G11B5/7315

摘要： There is provided a glass substrate which has the properties required in the use as a substrate for an information recording medium of the next generation such as a perpendicular magnetic recording system, and can be applied as a substrate for an information recording medium of the next generation particularly on the premise of using the glass substrate in a dynamic environment. More particularly, there is provided a glass substrate for an information recording medium which has sufficiently high surface hardness, has a good balance between specific gravity and mechanical strength, and has high strength to withstand high speed rotation or drop impact, and which can be produced with a high productivity adequate for a direct press method, without the occurrence of bubbles in the glass blank or reboil upon pressing even if arsenic components or antimony components are not substantially used. A glass substrate for an information recording medium, includes, as expressed in terms of percent by mass on the oxide basis: 52 to 67% of SiO2, 3 to 15% of Al2O3, and 0.2 to 8% of P2O5, the glass substrate having a Young's modulus of 85 GPa or greater, a specific gravity of 2.60 or less, and a ratio of Young's modulus to specific gravity (Young's modulus/specific gravity) of 33.0 or greater.

摘要翻译： 提供了具有在用作诸如垂直磁记录系统的下一代信息记录介质的基板所需的性能的玻璃基板，并且可以用作下一代信息记录介质的基板 特别是在动态环境中使用玻璃基板的前提下。 更具体地，提供了一种用于信息记录介质的玻璃基板，其具有足够高的表面硬度，比重和机械强度之间具有良好的平衡，并且具有高的耐受高速旋转或落下冲击的强度，并且可以制造 具有足够的直接压制方法的高生产率，即使在基本不使用砷成分或锑成分的情况下，也不会在玻璃坯料中发生气泡或者在压制时再沸腾。 用于信息记录介质的玻璃基板包括以氧化物为基准的质量百分比表示：SiO 2为52〜67％，Al 2 O 3为3〜15％，P 2 O 5为0.2〜8％，玻璃基板 杨氏模量为85GPa以上，比重为2.60以下，杨氏模量与比重（杨氏模量/比重）的比为33.0以上。

公开(公告)号：US08114795B2

公开(公告)日：2012-02-14

申请号：US12334794

申请日：2008-12-15

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： C03C10/04 ,  C03C10/14 ,  G11B7/241

CPC分类号： C03C10/0009 ,  C03C3/097 ,  C03C3/11 ,  C03C3/112 ,  Y10T428/24355 ,  Y10T428/315

摘要： For providing glass-ceramics having properties suitable for use as a substrate of an information storage medium of next generation such as one for the perpendicular magnetic recording system without employing arsenic and antimony components which adversely affect human beings and the environment, there are provided glass-ceramics comprising SiO2, Li2O and Al2O3 on oxide basis, comprising lithium disilicate as a crystal phase, and comprising one or more elements selected from the group consisting of Sn, Ce, Mn, W, Ta, Bi, Nb, S, Cl and F.

摘要翻译： 为了提供具有适合用作下一代信息存储介质的基板的玻璃陶瓷，例如用于垂直磁记录系统的玻璃陶瓷，而不使用对人体和环境有不利影响的砷和锑成分， 包含SiO 2，Li 2 O和Al 2 O 3的基于氧化物的陶瓷，包含二硅酸锂作为结晶相，并且包含选自Sn，Ce，Mn，W，Ta，Bi，Nb，S，Cl和F中的一种或多种元素 。

公开(公告)号：US08043985B2

公开(公告)日：2011-10-25

申请号：US11806875

申请日：2007-06-05

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： C03C10/14

CPC分类号： C03C10/0027 ,  C03C10/0054

摘要： Provided are SiO2—Al2O3-based or Li2O—Al2O3—SiO2-based crystallized glass which has various properties intrinsic to the crystallized glass of the type and which contains an arsenic component or an antimony component in an amount as small as possible or does not contain an arsenic component and an antimony component; and a method for producing the crystallized glass. The crystallized glass contains components of SiO2 and Al2O3 (as oxides) and contains an SnO2 component (as oxide) and/or a CeO2 component (as oxide). Preferably, the glass contains from 0.01 to 5.0% (as oxide) of an SnO2 component and/or from 0.01 to 5.0% (as oxide) of a CeO2 component.

摘要翻译： 本发明提供了SiO 2 -Al 2 O 3系或Li 2 O-Al 2 O 3 -SiO 2系结晶化玻璃，该结晶化玻璃具有本发明的结晶化玻璃的各种特性，其含有尽可能少的砷成分或锑成分， 砷成分和锑成分; 和结晶化玻璃的制造方法。 结晶玻璃含有SiO 2和Al 2 O 3（作为氧化物）的成分，含有SnO 2成分（氧化物）和/或CeO 2成分（作为氧化物）。 优选地，玻璃含有0.01〜5.0％（作为氧化物）的SnO 2成分和/或0.01〜5.0％（作为氧化物）的CeO 2成分。

公开(公告)号：US20110136651A1

公开(公告)日：2011-06-09

申请号：US13028485

申请日：2011-02-16

申请人： Toshitaka Yagi ,  Naoyuki Goto

发明人： Toshitaka Yagi ,  Naoyuki Goto

IPC分类号： C03C10/12

CPC分类号： C03C10/0009 ,  C03C3/097 ,  C03C3/11 ,  C03C3/112 ,  Y10T428/24355 ,  Y10T428/315

摘要： For providing glass-ceramics having properties suitable for use as a substrate of an information storage medium of next generation such as one for the perpendicular magnetic recording system without employing arsenic and antimony components which adversely affect human beings and the environment, there are provided glass-ceramics comprising SiO2, Li2O and Al2O3 on oxide basis, comprising lithium disilicate as a crystal phase, and comprising one or more elements selected from the group consisting of Sn, Ce, Mn, W, Ta, Bi, Nb, S, Cl and F.

摘要翻译： 为了提供具有适合用作下一代信息存储介质的基板的玻璃陶瓷，例如用于垂直磁记录系统的玻璃陶瓷，而不使用对人体和环境有不利影响的砷和锑成分， 包含SiO 2，Li 2 O和Al 2 O 3的基于氧化物的陶瓷，包含二硅酸锂作为结晶相，并且包含选自Sn，Ce，Mn，W，Ta，Bi，Nb，S，Cl和F中的一种或多种元素 。

公开(公告)号：US06387509B1

公开(公告)日：2002-05-14

申请号：US09253963

申请日：1999-02-22

申请人： Naoyuki Goto ,  Kousuke Nakajima

发明人： Naoyuki Goto ,  Kousuke Nakajima

IPC分类号： C03C1012

CPC分类号： G11B5/7315 ,  C03C3/062 ,  C03C3/066 ,  C03C3/068 ,  C03C3/085 ,  C03C3/093 ,  C03C3/095 ,  C03C3/097 ,  C03C10/00 ,  C03C10/0009 ,  C03C10/0027

摘要： A glass-ceramic substrate for a magnetic information recording medium contains, as a main crystal phase or phases, one or more crystal phases selected from the group consisting of &bgr;-quartz (&bgr;-SiO2), &bgr;-quartz solid solution (&bgr;-SiO2 solid solution), &bgr;-spodumene (&bgr;-Li2O.Al2O3.4SiO2), &bgr;-spodumene solid solution (&bgr;-Li2O.Al2O3.4SiO2 solid solution), &bgr;-eucryptite (&bgr;-Li2O.Al2O3.2SiO2, a part of Li2O being capable of being substituted by MgO and/or ZnO) and &bgr;-eucryptite solid solution (&bgr;-Li2O.Al2O3.2SiO2 solid solution, a part of Li2O being capable of being substituted by MgO and/or ZnO). Alternatively, the glass-ceramic contains, as a main crystal phase or phases, gahnite (ZnAl2O4) and/or gahnite solid solution (ZnAl2O4 solid solution). The glass-ceramic substrate has a high heat resisting property and a super flat surface capable of achieving a high recording density according to the perpendicular magnetic recording.

摘要翻译： 用于磁信息记录介质的玻璃陶瓷衬底包含一个或多个选自β-石英（β-SiO 2），β-石英固溶体（β-SiO 2）的晶相作为主晶相或相 固体溶液），β-锂辉石（β-Li2O.Al2O3.4SiO2），β-锂辉石固溶体（β-Li2O.Al2O3.4SiO2固溶体），β-锂辉石（β-Li2O.Al2O3.2SiO2，部分Li2O 能够被MgO和/或ZnO取代）和β-堇红石固溶体（β-Li2O.Al2O3.2SiO2固溶体，Li2O的一部分能够被MgO和/或ZnO取代）。 或者，玻璃陶瓷含有作为主要结晶相或相的高锰矿（ZnAl2O4）和/或高锰矿固溶体（ZnAl2O4固溶体）。 玻璃陶瓷基板具有高的耐热性能和能够根据垂直磁记录获得高记录密度的超平坦表面。

公开(公告)号：US06395368B1

公开(公告)日：2002-05-28

申请号：US09366578

申请日：1999-08-04

申请人： Katsuhiko Yamaguchi ,  Naoyuki Goto

发明人： Katsuhiko Yamaguchi ,  Naoyuki Goto

IPC分类号： G11B582

CPC分类号： C03C10/00 ,  C03C3/097 ,  C03C10/0009 ,  G11B5/7315 ,  Y10S428/90 ,  Y10T428/24355

摘要： A glass-ceramic substrate for a magnetic information storage medium having a super flat surface comprises, as a predominant phase or phases, at least one crystal phase selected from the group consisting of lithium disilicate (Li2O.2SiO2, having an interplaner spacing of maximum peak intensity measured by an X-ray diffraction analysis within a range from 3.57 Å and 3.62 Å), quartz (SiO2, having an interplaner spacing of maximum peak intensity measured by an X-ray diffraction analysis within a range from 3.33 Å to 3.41 Å), quartz solid solution (SiO2 solid solution, having an interplaner spacing of maximum peak intensity measured by an X-ray diffraction analysis within a range from 3.33 Å to 3.41 Å), cristobalite (SiO2, having an interplaner spacing of maximum peak intensity measured by an X-ray diffraction analysis within a range from 4.04 Å to 4.14 Å) and cristobalite solid solution (SiO2 solid solution, having an interplaner spacing of maximum peak intensity measured by an X-ray diffraction analysis within a range from 4.04 Å to 4.14 Å), has a coefficient of thermal expansion within a range from +62×10−−7/° C. to +130×10−7/° C. in a temperature range from −50° C. to +70° C., has Young's modulus within a range from 80 GPa to 150 GPa, has Vickers hardness within a range from 4.5 GPa to 15.0 GPa, has a specific gravity within a range from 2.2 to 2.8, has a surface roughness (Ra) after polishing within a range from 3 Å to 9 Å and contains Al2O3 in the amount of 2% to less than 10%.

摘要翻译： 用于具有超平坦表面的磁信息存储介质的玻璃陶瓷基板包括作为主要相或相的至少一个晶相，所述晶相位选自二硅酸锂（Li 2 O 2·SiO 2，具有最大峰的中间间隔 通过X射线衍射分析测量的强度在3.57和3.62的范围内），石英（SiO 2，具有通过X射线衍射分析测量的最大峰强度的中间间距在3.33至3.41范围内） ，石英固溶体（SiO 2固溶体，具有通过X射线衍射分析在3.33至3.41范围内测量的最大峰强度的中间间隔），方英石（SiO 2，具有由最大峰强度的中间间隔的距离，由 在4.04埃至4.14埃的范围内的X射线衍射分析）和方英石固溶体（SiO 2固溶体，具有通过Xr测量的最大峰强度的中间间隔间隔 在4.04Å至4.14Å范围内的ay衍射分析）的热膨胀系数在+ 62×10-7-7℃至+ 130×10-7 /℃的范围内，在-50° C.至+ 70℃，杨氏模量在80GPa至150GPa的范围内，维氏硬度在4.5GPa至15.0GPa的范围内，比重在2.2至2.8的范围内，具有表面 抛光后的粗糙度（Ra）在3至9的范围内，并含有2％至小于10％的Al2O3。