公开(公告)号：US08093167B2

公开(公告)日：2012-01-10

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： C03C3/097 ,  C03C3/083 ,  C03C3/11 ,  C03C10/04

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

摘要： For providing glasses and 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和玻璃陶瓷，例如用于垂直磁记录系统的基板，而不使用对人类和环境有不利影响的砷和锑成分， 包含基于氧化物的SiO 2，Li 2 O和Al 2 O 3的玻璃陶瓷，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中的一种或多种元素 和F.

公开(公告)号：US20100215993A1

公开(公告)日：2010-08-26

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： C03C3/105 ,  C03C3/108 ,  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：US20090162608A1

公开(公告)日：2009-06-25

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： G11B5/73 ,  C03B32/00 ,  C03C10/14

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：US20090118113A1

公开(公告)日：2009-05-07

申请号：US12262535

申请日：2008-10-31

申请人： Toshitaka YAGI

发明人： Toshitaka YAGI

IPC分类号： C03C3/097 ,  B32B5/16 ,  C03C3/078

CPC分类号： C03C10/0036 ,  C03C10/0045 ,  C03C10/0054 ,  G11B5/7315 ,  Y10T428/252 ,  Y10T428/258 ,  Y10T428/315

摘要： In all of an in-plane magnetic recording system and a perpendicular magnetic recording system, there is provided a crystallized glass for a disk substrate for information recording medium, etc., which has satisfactory surface properties capable of sufficiently adapting with a lamp loading system for high-density recording, has high strength such that it is able to withstand high-speed rotation and impact, has heat expansion properties and heat resistance in agreement with respective drive members, has a low melting temperature, has excellent productivity and is reduced in the elution amount of an alkali from the raw material, namely excellent in chemical durability. The crystallized glass of the invention is a crystallized glass containing an SiO2 component and an Li2O component; further containing at least one member selected from an SrO component and a BaO component in a total content of more than 3.5% and not more than 15% in terms of % by mass; and containing at least one member selected among lithium disilicate, lithium monosilicate, α-quartz, an α-quartz solid solution and a β-quartz solid solution as a main crystal phase on the oxide basis.

摘要翻译： 在所有的平面内磁记录系统和垂直磁记录系统中，提供了一种用于信息记录介质的盘基片的结晶玻璃等，其具有令人满意的表面性能，能够充分适应于用于 高密度记录，具有能够承受高速旋转和冲击的高强度，具有与各驱动构件一致的热膨胀性和耐热性，具有低熔融温度，具有优异的生产率并且在 来自原料的碱的洗脱量，即化学耐久性优异。 本发明的结晶化玻璃是含有SiO 2成分和Li 2 O成分的结晶化玻璃， 进一步含有选自SrO组分和BaO组分中的至少一种，其总含量以质量％计为大于3.5重量％且不超过15质量％ 并且在氧化物基上含有选自二硅酸锂，单硅酸盐，α-石英，α-石英固溶体和β-石英固溶体中的至少一种作为主晶相。

公开(公告)号：US20080268295A1

公开(公告)日：2008-10-30

申请号：US12108109

申请日：2008-04-23

申请人： Toshitaka YAGI

发明人： Toshitaka YAGI

IPC分类号： C03C3/078 ,  C03C3/085 ,  C03C3/087 ,  C03C3/093 ,  C03C3/095 ,  C03C3/097 ,  G11B5/706

CPC分类号： G11B5/7315 ,  C03C3/083 ,  C03C10/0027

摘要： Glass-ceramics include SiO2, Al2O3 and Li2O on oxide basis. In the glass-ceramics, total amount in mass % of SiO2 and Al2O3 is less than 77% and Li2O/(SiO2+Al2O3) which is the ratio in mass % of the amount of Li2O to the total amount of SiO2 and Al2O3 is 0.064 or over. The glass-ceramics include at least one crystal phase selected from the group consisting of β-quartz, β-quartz solid solution, β-eucryptite, β-eucryptite solid solution, β-spodumene and β-spodumene solid solution.

摘要翻译： 玻璃陶瓷包括氧化物基础上的SiO 2，Al 2 O 3 O 3和Li 2 O 3。 在玻璃陶瓷中，SiO 2和Al 2 O 3 3的质量％的总量小于77％，Li 2 O 3 2 O /（SiO 2 + Al 2 O 3 3），其中Li的量的质量％ 相对于SiO 2 2和Al 2 O 3 3的总量来说，SUB> 2 为0.064以上。 所述玻璃陶瓷包括至少一种选自β-石英，β-石英固溶体，β-堇红石，β-锂辉石固溶体，β-锂辉石和β-锂辉石固溶体的结晶相。

公开(公告)号：US08257831B2

公开(公告)日：2012-09-04

申请号：US12108109

申请日：2008-04-23

申请人： Toshitaka Yagi

发明人： Toshitaka Yagi

IPC分类号： B32B17/00 ,  C03C10/12

CPC分类号： G11B5/7315 ,  C03C3/083 ,  C03C10/0027

摘要： Glass-ceramics include SiO2, Al2O3 and Li2O on oxide basis. In the glass-ceramics, total amount in mass % of SiO2 and Al2O3 is less than 77% and Li2O/(SiO2+Al2O3) which is the ratio in mass % of the amount of Li2O to the total amount of SiO2 and Al2O3 is 0.064 or over. The glass-ceramics include at least one crystal phase selected from the group consisting of β-quartz, β-quartz solid solution, β-eucryptite, β-eucryptite solid solution, β-spodumene and β-spodumene solid solution.

摘要翻译： 玻璃陶瓷包括基于氧化物的SiO 2，Al 2 O 3和Li 2 O。 在玻璃陶瓷中，SiO 2和Al 2 O 3的质量％的总量小于77％，作为Li 2 O的质量％与SiO 2和Al 2 O 3的总量的比例的Li 2 O /（SiO 2 + Al 2 O 3）为0.064 或以上。 玻璃陶瓷包括至少一种选自以下的结晶相：石英，石英固溶体，白云母，白云母固体溶液，白云母和白云母固体; 解。

公开(公告)号：US08043706B2

公开(公告)日：2011-10-25

申请号：US12078639

申请日：2008-04-02

申请人： Naoyuki Goto ,  Toshitaka Yagi

发明人： Naoyuki Goto ,  Toshitaka Yagi

IPC分类号： B32B9/00 ,  C03C10/14

CPC分类号： C03B32/00 ,  C03B27/02 ,  C03C10/0045 ,  G11B5/7315 ,  H05K1/0306

摘要： An inorganic composition article used in disk substrate for information recording media, with a low melting point and a high productivity, combining superior surface characteristics capable of sufficiently dealing with a ramp load system for high density recording in both an in-plane magnetic recording system and a perpendicular magnetic recording system, having a high mechanical strength capable of enduring high speed rotation and impact, and combining both a heat expansion characteristic and heat resistance corresponding to each drive component. The inorganic composition articles contain a Li2O component and an Al2O3 component, with the percent by mass ratio of Li2O to Al2O3 (Li2O/Al2O3) being at least 0.3, include crystals, and have a compressive stress layer arranged on a surface.

摘要翻译： 一种在具有低熔点和高生产率的用于信息记录介质的盘基片中使用的无机组合物制品，其结合了能够充分处理在面内磁记录系统和 垂直磁记录系统，其具有能够耐受高速旋转和冲击的高机械强度，并且结合对应于每个驱动部件的热膨胀特性和耐热性。 所述无机组合物成分含有Li 2 O成分和Al 2 O 3成分，Li 2 O与Al 2 O 3的质量比（Li 2 O / Al 2 O 3）为0.3以上，包含结晶，在表面具有压应力层。

公开(公告)号：US20070281849A1

公开(公告)日：2007-12-06

申请号：US11806876

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 ,  C03C10/12

CPC分类号： C03C10/0027 ,  C03C10/0009

摘要： Provided are SiO2—Al2O3-based or Li2O—Al2O3—SiO2-based crystallized glass that solves the cause of cracking and fracture in forming it into large-size shaped articles, that has homogeneous inner quality and that may be produced stably at high efficiency; and a method for producing it. The crystallized glass contains components of SiO2 and Al2O3, wherein the crystal precipitation peak temperature width obtained in differential thermal analysis of amorphous glass, a precursor thereof, is at least 22° C. Preferably, the total amount of the TiO2 component and the ZrO2 component in the crystallized glass is within a range of from 3.0 to less than 4.3%. FIG. 1 is referred to.

摘要翻译： 提供的是SiO 2 -Al 2 O 3 O 3或Li 2 O-Al 2 O 2， 其结构化的玻璃，其解决了将其形成为大尺寸成形制品的开裂和断裂的原因，其具有均匀的内部质量，和/ 可以高效率地稳定地生产; 及其制造方法。 结晶玻璃含有SiO 2和Al 2 O 3 3的组分，其中在非晶玻璃的差示热分析中获得的晶体沉淀峰温度宽度 ，其前体为至少22℃。优选地，结晶玻璃中的TiO 2成分和ZrO 2 H 2成分的总量在 从3.0降到小于4.3％。 图。 参考图1。

公开(公告)号：US20070082294A1

公开(公告)日：2007-04-12

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： G11B7/24

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 S 2 Si 或者含有至少一个锂的结晶相的锂单硅酸锂（Li 2 SiO 3） 无机组合物中含有结晶相的粒子的平均粒径为1μm以下，环状弯曲强度为300MPa以上，表面粗糙度（算术平均粗糙度）为单硅酸盐（Li 2 SiO 3） 抛光过程为10埃或更少。

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。