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1. 发明授权

US08119267B2 Glass substrate for magnetic disk and manufacturing method of the same 有权
标题翻译：磁盘用玻璃基板及其制造方法
公开(公告)号：US08119267B2
公开(公告)日：2012-02-21
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： C03C3/078 , G11B5/706 , B23Q3/00
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。

2. 发明授权

US08783063B2 Glass substrate for magnetic disk and manufacturing method of the same 有权
标题翻译：磁盘用玻璃基板及其制造方法
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。

3. 发明申请

US20100190038A1 GLASS SUBSTRATE FOR MAGNETIC DISK AND MANUFACTURING METHOD OF THE SAME 有权
标题翻译：用于磁盘的玻璃基板及其制造方法
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。

4. 发明授权

US08652660B2 Glass substrate for magnetic recording medium and its use 有权
标题翻译：用于磁记录介质的玻璃基板及其用途
公开(公告)号：US08652660B2
公开(公告)日：2014-02-18
申请号：US13331667
申请日：2011-12-20
申请人： Hideki Isono , Kinobu Osakabe , Katsuyuki Iwata , Mikio Ikenishi , Naomi Matsumoto
发明人： Hideki Isono , Kinobu Osakabe , Katsuyuki Iwata , Mikio Ikenishi , Naomi Matsumoto
IPC分类号： C03C3/00 , G11B5/02 , G11B5/65
CPC分类号： G11B5/7315
摘要： An aspect of the present invention relates to a glass substrate for a magnetic recording medium, which is comprised of glass with a glass transition temperature of equal to or greater than 600° C., an average coefficient of linear expansion at 100 to 300° C. of equal to or greater than 70×10−7/° C., a Young's modulus of equal to or greater than 81 GPa, a specific modulus of elasticity of equal to or greater than 30 MNm/kg, and a fracture toughness value of equal to or greater than 0.9 MPa·m1/2.
摘要翻译：本发明的一个方面涉及一种用于磁记录介质的玻璃基板，其由玻璃化转变温度等于或大于600℃的玻璃组成，在100至300℃的平均线性膨胀系数，等于或大于70×10-7 /℃，杨氏模量等于或大于81GPa，比模弹性等于或大于30MNm / kg，断裂韧性值等于或大于0.9MPa·m1 / 2。

5. 发明授权

US08413464B2 Method for producing glass substrate for magnetic disk and method for producing magnetic disk 有权
标题翻译：制造磁盘用玻璃基板的方法及其制造方法
公开(公告)号：US08413464B2
公开(公告)日：2013-04-09
申请号：US12088815
申请日：2007-09-12
申请人： Katsuyuki Iwata , Hideki Isono , Kenichiro Terada
发明人： Katsuyuki Iwata , Hideki Isono , Kenichiro Terada
IPC分类号： C03C21/00
CPC分类号： G11B5/7315 , C03C17/008 , C03C21/001 , C03C21/002 , C03C21/005 , G11B5/8404
摘要： The present invention provides a method for producing a glass substrate for a magnetic disk in which the occurrence of micro-waviness on the glass substrate is prevented in a cooling step after a chemically strengthening step so that the glass substrate has a significantly smooth principal surface, and provides a method for producing a magnetic disk in which head crash, thermal asperity failures, and the like are prevented, the flying height of a magnetic head can be decreased, and high-density recording is enabled.In a method for producing a glass substrate for a magnetic disk including a chemically strengthening step in which a glass substrate is immersed in a heated chemically strengthening salt solution prepared by dissolving a chemically strengthening salt under heating, and metal ions in the glass substrate are ion-exchanged with metal ions in the chemically strengthening salt, wherein the chemically strengthening step is carried out using a chemically strengthening salt solution in which the dissolved chemically strengthening salt does not solidify until the temperature decreases to a temperature that provides hardness at which the surface shape of the glass substrate is not deformed by a force applied to the glass substrate when the chemically strengthening salt having adhered onto the glass substrate solidifies.
摘要翻译：本发明提供了一种制造用于磁盘的玻璃基板的方法，其中在化学强化步骤之后在冷却步骤中防止在玻璃基板上发生微波纹，使得玻璃基板具有显着平滑的主表面，并且提供了一种制造磁头的方法，其中防止头部碰撞，热凹凸不平等，可以降低磁头的飞行高度，并且能够进行高密度记录。在一种用于制造用于磁盘的玻璃基板的方法中，包括化学强化步骤，其中将玻璃基板浸入通过在加热下溶解化学强化盐而制备的加热的化学强化盐溶液中，并且玻璃基板中的金属离子是离子与化学强化盐中的金属离子交换，其中化学强化步骤使用化学强化盐溶液进行，其中溶解的化学强化盐不固化，直到温度降低到提供硬度的温度，其中表面形状当玻璃基板附着的化学强化盐固化时，玻璃基板的作用力不会施加到玻璃基板上。

6. 发明申请

US20090277222A1 METHOD FOR PRODUCING GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR PRODUCING MAGNETIC DISK 有权
标题翻译：用于生产用于磁盘的玻璃基板的方法和用于制造磁盘的方法
公开(公告)号：US20090277222A1
公开(公告)日：2009-11-12
申请号：US12088815
申请日：2007-09-12
申请人： Katsuyuki Iwata , Hideki Isono , Kenichiro Terada
发明人： Katsuyuki Iwata , Hideki Isono , Kenichiro Terada
IPC分类号： C03C21/00
CPC分类号： G11B5/7315 , C03C17/008 , C03C21/001 , C03C21/002 , C03C21/005 , G11B5/8404
摘要： The present invention provides a method for producing a glass substrate for a magnetic disk in which the occurrence of micro-waviness on the glass substrate is prevented in a cooling step after a chemically strengthening step so that the glass substrate has a significantly smooth principal surface, and provides a method for producing a magnetic disk in which head crash, thermal asperity failures, and the like are prevented, the flying height of a magnetic head can be decreased, and high-density recording is enabled.In a method for producing a glass substrate for a magnetic disk including a chemically strengthening step in which a glass substrate is immersed in a heated chemically strengthening salt solution prepared by dissolving a chemically strengthening salt under heating, and metal ions in the glass substrate are ion-exchanged with metal ions in the chemically strengthening salt, wherein the chemically strengthening step is carried out using a chemically strengthening salt solution in which the dissolved chemically strengthening salt does not solidify until the temperature decreases to a temperature that provides hardness at which the surface shape of the glass substrate is not deformed by a force applied to the glass substrate when the chemically strengthening salt having adhered onto the glass substrate solidifies.
摘要翻译：本发明提供了一种制造用于磁盘的玻璃基板的方法，其中在化学强化步骤之后在冷却步骤中防止在玻璃基板上发生微波纹，使得玻璃基板具有显着平滑的主表面，并且提供了一种制造磁头的方法，其中防止头部碰撞，热凹凸不平等，可以降低磁头的飞行高度，并且能够进行高密度记录。在一种用于制造用于磁盘的玻璃基板的方法中，包括化学强化步骤，其中将玻璃基板浸入通过在加热下溶解化学强化盐而制备的加热的化学强化盐溶液中，并且玻璃基板中的金属离子是离子与化学强化盐中的金属离子交换，其中化学强化步骤使用化学强化盐溶液进行，其中溶解的化学强化盐不固化，直到温度降低到提供硬度的温度，其中表面形状当玻璃基板附着的化学强化盐固化时，玻璃基板的作用力不会施加到玻璃基板上。

7. 发明授权

US08806895B2 Manufacturing method for a glass substrate for magnetic disk 有权
标题翻译：磁盘用玻璃基板的制造方法
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。

8. 发明授权

US08733129B2 Glass substrate for magnetic disk and manufacturing method thereof 有权
标题翻译：磁盘用玻璃基板及其制造方法
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。

9. 发明申请

US20110159320A1 GLASS SUBSTRATE FOR MAGNETIC DISK AND MANUFACTURING METHOD THEREOF 有权
标题翻译：用于磁盘的玻璃基板及其制造方法
公开(公告)号：US20110159320A1
公开(公告)日：2011-06-30
申请号：US12979171
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 , G11B5/84 , G11B5/73 , B24B1/00
CPC分类号： G11B5/735 , B24B1/00 , C03B11/088 , C03B2215/44 , C03C19/00 , G11B5/8404 , Y10T428/24355
摘要： The present invention provides a glass substrate for magnetic disk in which surface irregularity of a principal surface is suppressed and a method for efficiently manufacturing a glass substrate for magnetic disk. The method includes the steps of: forming a sheet glass material by performing press forming to molten glass, a principal surface of the sheet glass material having target flatness for the glass substrate for magnetic disk, the sheet glass material having a surface shape to be ground using a grinding abrasive grain; grinding the sheet glass material using a fixed abrasive grain; and polishing the sheet glass material using a loose abrasive grain, the sheet glass material having surface irregularity of the principal surface ground using the fixed abrasive grain.
摘要翻译：本发明提供了一种用于抑制主面的表面不规则性的磁盘用玻璃基板和有效地制造磁盘用玻璃基板的方法。该方法包括以下步骤：通过对熔融玻璃进行压制成形来形成玻璃板材料，对于具有用于磁盘的玻璃基板的目标平面度的玻璃板材料的主表面，具有待研磨的表面形状的玻璃板材料使用研磨磨粒; 用固定的磨粒研磨平板玻璃材料; 并且使用松散的磨粒抛光玻璃板材料，该玻璃板材料使用固定的磨料颗粒具有主表面磨削的表面不规则性。

10. 发明申请

US20100024484A1 METHOD OF MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK AND SYSTEM FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK 有权
标题翻译：制造用于磁盘的玻璃基板的制造方法和用于制造用于磁盘的玻璃基板的系统
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。

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