公开(公告)号：US08806895B2

公开(公告)日：2014-08-19

申请号：US13313593

申请日：2011-12-07

申请人： Shinji Eda ,  Hideki Isono ,  Akira Murakami

发明人： Shinji Eda ,  Hideki Isono ,  Akira Murakami

IPC分类号： C03B11/08 ,  C03B7/12 ,  C03B7/11 ,  C03B11/05 ,  C03B11/12 ,  C03C19/00 ,  C03C21/00

CPC分类号： C03B7/11 ,  C03B11/05 ,  C03B11/088 ,  C03B11/122 ,  C03B2215/70 ,  C03C19/00 ,  C03C21/002

摘要： The present invention provides a manufacturing method of a sheet glass material excellent in flatness. A manufacturing method of glass substrate for magnetic disk including a pair of principal surfaces, the method comprising the steps of: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by performing press forming to the lump while sandwiching the lump from both sides of the dropping path of the lump with facing surfaces of a pair of dies, the pair of dies being set to substantially the same temperature; and processing process for processing the sheet glass material, while the lump drops down while revolving around its dropping axis.

摘要翻译： 本发明提供了平坦度优异的平板玻璃材料的制造方法。 一种包括一对主表面的用于磁盘的玻璃基板的制造方法，所述方法包括以下步骤：落下熔融玻璃块的滴落处理; 通过在一块模具的相对表面上从块体的下落路径的两侧夹持块状物的同时进行冲压成形而形成片状玻璃材料的压制工序，一对模具被设定为大致相同的温度; 以及用于处理片状玻璃材料的处理过程，同时在其下落轴线周围旋转时块状物下落。

公开(公告)号：US20130042649A1

公开(公告)日：2013-02-21

申请号：US13397180

申请日：2012-02-15

申请人： Hideki ISONO ,  Akira Murakami ,  Shinji Eda

发明人： Hideki ISONO ,  Akira Murakami ,  Shinji Eda

IPC分类号： G11B5/84 ,  C03B11/00

CPC分类号： C03B7/10 ,  C03B7/14 ,  C03B7/16 ,  C03B11/088 ,  C03B40/04 ,  C03B2215/70 ,  C03C19/00 ,  C03C21/001 ,  G11B5/8404

摘要： A manufacturing method of a glass blank for magnetic disk including a pair of principal surfaces, the method including: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by sandwiching simultaneously the lump from both sides of the dropping path of the lump with surfaces of the pair of dies facing together, and performing press forming to the lump; and temperature adjusting process for adjusting temperature of the lump before the pressing process such that viscosity variation of the lump is reduced with respect to positions over the entirety of the lump in the pressing process.

摘要翻译： 一种用于包括一对主表面的磁盘用玻璃坯料的制造方法，所述方法包括：滴下熔融玻璃片的滴落工序; 压制工艺用于通过将一对模具的表面面向一体的同时从块体的下落路径的两侧夹持块体，并进行冲压成形而形成片状玻璃材料; 以及用于在压制过程之前调节块的温度的温度调节过程，使得块的粘度变化相对于在压制过程中的整体上的位置减小。

公开(公告)号：US08806893B2

公开(公告)日：2014-08-19

申请号：US13397180

申请日：2012-02-15

申请人： Hideki Isono ,  Akira Murakami ,  Shinji Eda

发明人： Hideki Isono ,  Akira Murakami ,  Shinji Eda

IPC分类号： C03B11/08 ,  C03B7/094 ,  C03B7/14 ,  C03B40/04 ,  G11B5/84 ,  C03C19/00 ,  C03B7/10 ,  C03B7/16 ,  C03C21/00

CPC分类号： C03B7/10 ,  C03B7/14 ,  C03B7/16 ,  C03B11/088 ,  C03B40/04 ,  C03B2215/70 ,  C03C19/00 ,  C03C21/001 ,  G11B5/8404

摘要： A manufacturing method of a glass blank for magnetic disk including a pair of principal surfaces, the method including: dropping process for dropping a lump of molten glass; pressing process for forming a sheet glass material by sandwiching simultaneously the lump from both sides of the dropping path of the lump with surfaces of the pair of dies facing together, and performing press forming to the lump; and temperature adjusting process for adjusting temperature of the lump before the pressing process such that viscosity variation of the lump is reduced with respect to positions over the entirety of the lump in the pressing process.

摘要翻译： 一种用于包括一对主表面的磁盘用玻璃坯料的制造方法，所述方法包括：滴下熔融玻璃片的滴落工序; 压制工艺用于通过将一对模具的表面面向一体的同时从块体的下落路径的两侧夹持块体，并进行冲压成形而形成片状玻璃材料; 以及用于在压制过程之前调节块的温度的温度调节过程，使得块的粘度变化相对于在压制过程中的整体上的位置减小。

公开(公告)号：US08785010B2

公开(公告)日：2014-07-22

申请号：US13120320

申请日：2009-09-29

申请人： Shinji Eda ,  Hideki Isono ,  Takashi Maeda ,  Hiroshi Tsuchiya ,  Yoshinori Marumo

发明人： Shinji Eda ,  Hideki Isono ,  Takashi Maeda ,  Hiroshi Tsuchiya ,  Yoshinori Marumo

IPC分类号： B32B3/26 ,  B24B7/00 ,  C03C21/00 ,  C03C23/00 ,  G11B5/84

CPC分类号： C03C23/009 ,  C03C19/00 ,  C03C21/008 ,  C03C23/0075 ,  C03C2204/08 ,  C09G1/02 ,  G11B5/7315 ,  G11B5/8404 ,  G11B5/8408

摘要： Provided are a magnetic disk substrate and a method of manufacturing the same, wherein the magnetic disk substrate has very few defects present on its surface with an arithmetic mean roughness (Ra) at a level in the vicinity of 0.1 nm and thus is suitable as a substrate for a magnetic disk with high recording density. The magnetic disk glass substrate is such that the arithmetic mean roughness (Ra) of the main surface of the glass substrate measured using an atomic force microscope with a resolution of 256×256 pixels in a 2 μm×2 μm square is 0.12 nm or less and the number of defects detected to have a size of 0.1 μm to 0.6 μm in plan view and a depth of 0.5 nm to 2 nm is less than 10 per 24 cm2, wherein the defects are each detected using a shift in wavelength between incident light and reflected light upon irradiating and scanning helium neon laser light with a wavelength of 632 nm on the main surface of the glass substrate.

摘要翻译： 提供一种磁盘基板及其制造方法，其中，磁盘基板的表面上存在极少的缺陷，算术平均粗糙度（Ra）在0.1nm附近，因此适合作为 具有高记录密度的磁盘的基板。 磁盘玻璃基板使用原子力显微镜在2μm×2μm的正方形中以256×256像素的分辨率测量的玻璃基板的主面的算术平均粗糙度（Ra）为0.12nm以下 并且在平面图中检测为具有0.1μm至0.6μm的尺寸和0.5nm至2nm的深度的缺陷的数量小于每24cm 2的10个，其​​中每个使用入射光之间的波长偏移检测缺陷 并在玻璃基板的主表面上照射和扫描波长为632nm的氦氖激光的反射光。

公开(公告)号：US08783063B2

公开(公告)日：2014-07-22

申请号：US13349495

申请日：2012-01-12

申请人： Kinobu Osakabe ,  Hideki Isono ,  Katsuyuki Iwata ,  Shinji Eda ,  Kenichiro Terada

发明人： Kinobu Osakabe ,  Hideki Isono ,  Katsuyuki Iwata ,  Shinji Eda ,  Kenichiro Terada

IPC分类号： C03B9/14 ,  B05C3/00 ,  G11B5/73 ,  C03C21/00 ,  G11B17/08

CPC分类号： G11B5/7315 ,  C03C21/002 ,  G11B5/8404

摘要： A glass substrate for a magnetic disk of the invention is a disk-shaped glass substrate for a magnetic disk where the substrate has a main surface and end face and is subjected to chemical reinforcement treatment, and is characterized in that the penetration length in the uppermost-portion stress layer on the main surface is 49.1 μm or less, and that assuming that an angle between the main surface and compressive stress in the stress profile by a Babinet compensator method is θ, a value y of {12·t·ln(tan θ)+(49.1/t)} is the penetration length in the uppermost-portion stress layer or less.

摘要翻译： 本发明的磁盘用玻璃基板是用于磁盘的盘状玻璃基板，其中基板具有主表面和端面并进行化学强化处理，其特征在于，最上面的穿透长度 主表面的应力层为49.1μm以下，假设通过Babinet补偿方法在应力分布中的主表面与压缩应力之间的角度为θ，则{12·t·ln （tan＆amp; t s）+（49.1 / t）}是最上部应力层的贯通长度以下。

公开(公告)号：US20100190038A1

公开(公告)日：2010-07-29

申请号：US12665623

申请日：2008-09-26

申请人： Kinobu Osakabe ,  Hideki Isono ,  Katsuyuki Iwata ,  Shinji Eda ,  Kenichiro Terada

发明人： Kinobu Osakabe ,  Hideki Isono ,  Katsuyuki Iwata ,  Shinji Eda ,  Kenichiro Terada

IPC分类号： G11B5/73 ,  B05D1/18 ,  G11B5/82 ,  G11B5/84

CPC分类号： G11B5/7315 ,  C03C21/002 ,  G11B5/8404

摘要： A glass substrate for a magnetic disk of the invention is a disk-shaped glass substrate for a magnetic disk where the substrate has a main surface and end face and is subjected to chemical reinforcement treatment, and is characterized in that the penetration length in the uppermost-portion stress layer on the main surface is 49.1 μm or less, and that assuming that an angle between the main surface and compressive stress in the stress profile by a Babinet compensator method is θ, a value y of {12·t·ln(tan θ)+(49.1/t)} is the penetration length in the uppermost-portion stress layer or less.

摘要翻译： 本发明的磁盘用玻璃基板是用于磁盘的盘状玻璃基板，其中基板具有主表面和端面并进行化学强化处理，其特征在于，最上面的穿透长度 主表面的应力层为49.1μm以下，假设通过Babinet补偿方法在应力分布中的主表面与压缩应力之间的角度为θ，则{12·t·ln （tan＆amp; t s）+（49.1 / t）}是最上部应力层的贯通长度以下。

公开(公告)号：US08733129B2

公开(公告)日：2014-05-27

申请号：US12979176

申请日：2010-12-27

申请人： Shinji Eda ,  Hideki Isono

发明人： Shinji Eda ,  Hideki Isono

IPC分类号： G11B5/82 ,  C03C19/00 ,  B24B41/06 ,  C03C3/00 ,  C03B11/00 ,  C03B11/08 ,  C03B11/12

CPC分类号： C03B11/05 ,  B24B41/06 ,  C03B11/005 ,  C03B11/08 ,  C03B11/088 ,  C03B11/125 ,  G11B5/7315 ,  G11B5/735 ,  G11B5/8404

摘要： The present invention provides a method for efficiently manufacturing a glass substrate for magnetic disk having good accuracy of a surface irregularity and an impact resistance. The method includes the steps of: performing press forming to molten glass to prepare a sheet glass material, the sheet glass material having a roughness of the principal surface of 0.01 μm or less and target flatness of a glass substrate for magnetic disk; chemically strengthening the sheet glass material by dipping the sheet glass material in a chemically strengthening salt, thereby preparing a disk substrate; polishing the principal surfaces of the disk substrate. A thickness of the sheet glass material prepared in the press forming step is larger than a target thickness of the glass substrate for magnetic disk by a polishing quantity of the principal surface polishing step.

摘要翻译： 本发明提供一种有效制造具有良好的表面不规则性和耐冲击性精度的磁盘用玻璃基板的方法。 该方法包括以下步骤：对熔融玻璃进行压制成型以制备玻璃板材料，该主要表面的粗糙度为0.01μm以下的玻璃材料和用于磁盘的玻璃基板的目标平面度; 通过将片状玻璃材料浸渍在化学强化盐中来化学强化片状玻璃材料，从而制备盘基片; 抛光盘基片的主表面。 通过主表面研磨工序的研磨量，在压制成形工序中制备的平板玻璃材料的厚度大于用于磁盘的玻璃基板的目标厚度。

公开(公告)号：US20100024484A1

公开(公告)日：2010-02-04

申请号：US12525251

申请日：2008-01-24

申请人： Ryuuichi Kashima ,  Hideki Isono ,  Shinji Eda ,  Tomotaka Yokoyama ,  Tadashi Tomonaga ,  Kraisorn Phandon ,  Weeraphan Yayod

发明人： Ryuuichi Kashima ,  Hideki Isono ,  Shinji Eda ,  Tomotaka Yokoyama ,  Tadashi Tomonaga ,  Kraisorn Phandon ,  Weeraphan Yayod

IPC分类号： C03C21/00

CPC分类号： B24B9/08 ,  C03C21/002 ,  G11B5/8404

摘要： To provide a magnetic-disk glass substrate manufacturing method that can reduce the inner diameter dimensional error.A magnetic-disk glass substrate manufacturing method of this invention including a chemical strengthening step of bringing a plurality of glass substrates 102 into contact with chemical strengthening treatment solutions of a plurality of chemical strengthening treatment baths 130, respectively, to chemically strengthen the glass substrates further includes an inner diameter measuring step of measuring the inner diameter of each of the glass substrates 102 before the chemical strengthening step, a grasping step of grasping a variation of the inner diameter of the glass substrate 102 to be generated by the chemical strengthening step for each of the chemical strengthening treatment baths 130, and a combination determining step of determining the chemical strengthening treatment baths 130, that perform chemical strengthening, based on the variations so that the inner diameters of the glass substrates, whose inner diameters are measured, after the chemical strengthening step become a desired value. In the chemical strengthening step, the glass substrates 102 are chemically strengthened in the determined chemical strengthening treatment baths 130, respectively.

摘要翻译： 提供可以减小内径尺寸误差的磁盘玻璃基板的制造方法。 本发明的磁盘玻璃基板的制造方法包括使多个玻璃基板102分别与多个化学强化处理槽130的化学强化处理液接触的化学强化工序，以进一步化学强化玻璃基板 包括在化学强化步骤之前测量每个玻璃基板102的内径的内径测量步骤，抓取步骤，通过每个步骤获取通过化学强化步骤产生的玻璃基板102的内径的变化 化学强化处理槽130的化学强化处理槽130的化学强化处理槽130的化学强化处理槽130的组合判定步骤，基于这些变化，进行化学强化的化学强化处理槽130，使得测定内径的玻璃基板的内径在化学品 加强步骤成为一个希望 ed值。 在化学强化步骤中，分别在确定的化学强化处理槽130中对玻璃基板102进行化学强化。

公开(公告)号：US20050284179A1

公开(公告)日：2005-12-29

申请号：US11078324

申请日：2005-03-14

申请人： Hideki Isono ,  Shinji Eda ,  Kazuhiko Maeda ,  Naohiro Kamiya ,  Nobuyuki Eto

发明人： Hideki Isono ,  Shinji Eda ,  Kazuhiko Maeda ,  Naohiro Kamiya ,  Nobuyuki Eto

IPC分类号： C03C3/083 ,  C03C19/00 ,  C03C21/00

CPC分类号： C03C3/083 ,  C03C19/00 ,  C03C21/002

摘要： A magnetic disk glass substrate manufacturing method includes a step of polishing a surface of a glass substrate to a mirror surface, a gas heating process step of causing a heated atmosphere and the glass substrate to contact each other so as to heat the glass substrate at a temperature T0, a step of causing a chemically strengthening salt melted exceeding a freezing temperature TF and the glass substrate to contact each other so as to chemically strengthen the glass substrate at a temperature T1, a gas cooling process step of causing a gas coolant and the glass substrate to contact each other so as to cool the glass substrate to a temperature T2, and a liquid cooling process step of causing a liquid coolant and the glass substrate to contact each other so as to cool the glass substrate to a temperature T3, the above-mentioned steps being included in this order, wherein the temperature T2 is set to a temperature less than the freezing temperature TF of the chemical strengthening salt in a gas cooling process.

摘要翻译： 磁盘玻璃基板的制造方法包括将玻璃基板的表面研磨成镜面的工序，使加热气氛与玻璃基板接触的气体加热工序，以将玻璃基板加热到 温度T <0℃，使化学强化盐熔化超过冷冻温度T F F和玻璃基板彼此接触的步骤，以化学强化玻璃基板 温度T 1℃，使气体冷却剂和玻璃基板彼此接触以将玻璃基板冷却至温度T 2的气体冷却工序， 以及使液体冷却剂和玻璃基板彼此接触以使玻璃基板冷却至T 3 3℃的液体冷却工序，上述步骤依次包含， 其中温度T 2 2被设定为小于th的温度 在气体冷却过程中的化学强化盐的冷冻温度T≠F。

公开(公告)号：US08973404B2

公开(公告)日：2015-03-10

申请号：US13379803

申请日：2011-03-31

申请人： Shinji Eda ,  Hideki Isono

发明人： Shinji Eda ,  Hideki Isono

IPC分类号： C03B11/05 ,  C03B11/12 ,  G11B5/84 ,  C03B7/10 ,  C03B11/08 ,  C03C19/00

CPC分类号： G11B5/8404 ,  C03B7/10 ,  C03B11/05 ,  C03B11/088 ,  C03B11/122 ,  C03B2215/06 ,  C03B2215/70 ,  C03C19/00

摘要： There are provided, a method for efficiently manufacturing a glass substrate for magnetic disk in which the degree of surface irregularity of the principal surface is suppressed, and the glass substrate for magnetic disk. When manufacturing a glass substrate for magnetic disk including a pair of principal surfaces, a glass blank is formed by pressing molten glass or softened glass with planar press forming surfaces of dies in such a way that the molten glass or the softened glass is sandwiched from the both sides. Temperature condition is equalized around the pair of principal surfaces of the glass blank during the pressing.

摘要翻译： 提供了一种有效地制造其中主表面的表面不规则度被抑制的磁盘用玻璃基板和磁盘用玻璃基板的方法。 当制造包括一对主表面的磁盘用玻璃基板时，通过将熔融玻璃或软化玻璃与模具的平面冲压成型面压制成玻璃坯料，使得熔融玻璃或软化玻璃从 双方。 在压制期间，玻璃坯料的一对主表面周围的温度条件相等。