公开(公告)号：US07040953B2

公开(公告)日：2006-05-09

申请号：US10205073

申请日：2002-07-25

申请人： Kensuke Matsuno ,  Takeo Watanabe ,  Junji Kurachi

发明人： Kensuke Matsuno ,  Takeo Watanabe ,  Junji Kurachi

IPC分类号： B24B1/00 ,  C03C19/00

CPC分类号： G11B5/8404 ,  B24B37/048 ,  C03C15/00 ,  C03C19/00 ,  C03C2204/08 ,  G11B5/82 ,  G11B23/50

摘要： There are provided a substrate for information recording media and a manufacturing method thereof, according to which the projection height of minute undulations formed on the substrate surfaces can be made more uniform, and variation in the projection density can be suppressed. First, chemical strengthening treatment is carried out on a glass substrate that has been prepared by processing a sheet-shaped starting material glass plate into a predetermined shape. Then, precision polishing is carried out on the glass substrate that has been subjected to the chemical strengthening treatment, such that a polishing amount in a thickness direction of the glass substrate is within a predetermined range. Finally, surface washing is carried out on the glass substrate that has been subjected to said precision polishing.

公开(公告)号：US20090286454A1

公开(公告)日：2009-11-19

申请号：US12482006

申请日：2009-06-10

申请人： Masamichi Kezuka ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

发明人： Masamichi Kezuka ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

IPC分类号： B24B7/24 ,  B24B1/00

CPC分类号： G11B5/7315 ,  C03C19/00 ,  G11B5/8404 ,  G11B7/00 ,  G11B11/10589

摘要： A substrate for use as a disk substrate in a hard disk drive or the like, an information recording medium such as a magnetic disk, and a starting material glass plate which is a starting material of the substrate for information recording media. The forming conditions of the starting material glass plate are controlled such that the starting material glass plate has a long-wavelength waviness of not more than 6 nm. This starting material glass plate is polished so as to have a long-wavelength waviness of not more than 6 nm using CeO2 abrasive grains having a mean grain diameter of not less than 0.01 μpm and a 90% diameter of the volume grain size distribution of not less than 0.02 μm. The resulting substrate for an information recording medium has an excellent planarity, can be obtained in a short time and with a low polishing amount, and the resulting information recording medium is able to cope with increased data zone recording density.

摘要翻译： 用作硬盘驱动器等中的盘基板的基板，诸如磁盘的信息记录介质和作为用于信息记录介质的基板的起始材料的起始材料玻璃板。 控制起始材料玻璃板的成形条件使原料玻璃板的长波长波长不大于6nm。 使用平均粒径为0.01μm以上且平均粒径为0.01μm以上且体积粒径分布的90％直径不超过6nm的长波长波纹，将该原料玻璃板进行抛光 小于0.02毫米。 所得信息记录介质的基板具有优异的平面性，可以在短时间内以低抛光量获得，并且所得到的信息记录介质能够应对增加的数据区记录密度。

公开(公告)号：US07604882B2

公开(公告)日：2009-10-20

申请号：US11407586

申请日：2006-04-20

申请人： Masamichi Kezuka ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

发明人： Masamichi Kezuka ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

IPC分类号： G11B5/71 ,  B32B17/08

CPC分类号： G11B5/7315 ,  C03C19/00 ,  G11B5/8404 ,  G11B7/00 ,  G11B11/10589

摘要： A substrate for use as a disk substrate in a hard disk drive or the like, an information recording medium such as a magnetic disk, and a starting material glass plate which is a starting material of the substrate for information recording media. The forming conditions of the starting material glass plate are controlled such that the starting material glass plate has a long-wavelength waviness of not more than 6 nm. This starting material glass plate is polished so as to have a long-wavelength waviness of not more than 6 nm using CeO2 abrasive grains having a mean grain diameter of not less than 0.01 μm and a 90% diameter of the volume grain size distribution of not less than 0.02 μm. The resulting substrate for an information recording medium has an excellent planarity, can be obtained in a short time and with a low polishing amount, and the resulting information recording medium is able to cope with increased data zone recording density.

摘要翻译： 用作硬盘驱动器等中的盘基板的基板，诸如磁盘的信息记录介质和作为用于信息记录介质的基板的起始材料的起始材料玻璃板。 控制起始材料玻璃板的成形条件使原料玻璃板的长波长波长不大于6nm。 使用平均粒径不小于0.01μm的CeO2磨粒和体积粒径分布的90％直径，将该原料玻璃板进行抛光，使其长波长波纹不大于6nm 小于0.02毫米。 所得信息记录介质的基板具有优异的平面性，可以在短时间内以低抛光量获得，并且所得到的信息记录介质能够应对增加的数据区记录密度。

公开(公告)号：US06808784B2

公开(公告)日：2004-10-26

申请号：US10143372

申请日：2002-05-10

申请人： Junichi Hashimoto ,  Kensuke Matsuno ,  Takeo Watanabe

发明人： Junichi Hashimoto ,  Kensuke Matsuno ,  Takeo Watanabe

IPC分类号： G11B582

CPC分类号： G11B5/7315 ,  C03C19/00 ,  G11B5/8404 ,  Y10T428/219

摘要： There is provided a glass substrate for magnetic recording media, which enables damage to a magnetic recording medium using the glass substrate to be prevented. The glass substrate is a donut-shaped glass substrate comprising major surfaces, an outer peripheral edge surface, an inner peripheral edge surface, and chamfered surfaces, each connecting between one of the major surfaces and one of the outer peripheral edge surface and the inner peripheral edge surface. Each of the chamfered surfaces comprises a conical surface part and an annular curved surface part connected to one another, and for each of the chamfered surfaces, a percentage ratio of a length of an outline of the annular curved surface part to a length of an outline of the chamfered surface in a cross section of the glass substrate including a central axis of the glass substrate is not less than a predetermined value.

摘要翻译： 提供了一种用于磁记录介质的玻璃基板，其能够防止使用玻璃基板的磁记录介质的损坏。 玻璃基板是包括主表面，外周边缘表面，内周边缘表面和倒角表面的环形玻璃基板，每个连接在一个主表面和外周边缘表面和内周边之一 边缘表面。 每个倒角表面包括圆锥形表面部分和相互连接的环形曲面部分，并且对于每个倒角表面，环形曲面部分的轮廓长度与轮廓长度的百分比 在包括玻璃基板的中心轴线的玻璃基板的截面中的倒角面的面积不小于预定值。

公开(公告)号：US20050101230A1

公开(公告)日：2005-05-12

申请号：US11003148

申请日：2004-12-03

申请人： Takamasa Yoshikawa ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

发明人： Takamasa Yoshikawa ,  Koji Okuhata ,  Kensuke Matsuno ,  Takeo Watanabe

IPC分类号： B24B7/24 ,  B24B9/00 ,  B24B9/06 ,  B24B41/06 ,  C03C19/00 ,  G11B5/84 ,  B24B1/00

CPC分类号： B24B9/065 ,  B24B41/06

摘要： The present invention provides a method which can simultaneously grind inner peripheral edges and outer peripheral edges of a multiplicity of glass substrates used for magnetic storage media or the like. In order to chamfer the outer edges of the glass substrates g, a multiplicity of annular glass substrates g are firstly stacked with buffer sheets 5 interposed between the glass substrates to make a glass substrate block G. Then, a first plates 1, 1 of the above described clamping jig are applied to both sides of the glass substrate block G, and a first fastening tool 3 is inserted through center holes of the first plates 1, 1 and the glass substrate block G. Next, the glass substrate block G is clamped from an inside thereof for chamfering the outer edges with a grindstone 6.

摘要翻译： 本发明提供一种可以同时研磨用于磁存储介质等的多个玻璃基板的内周边缘和外周边缘的方法。 为了对玻璃基板g的外边缘进行倒角，首先将多个环形玻璃基板g与夹在玻璃基板之间的缓冲片5堆叠起来，制成玻璃基板块G.然后，将第一板 将上述夹持夹具施加到玻璃基板块G的两侧，并且将第一紧固工具3插入穿过第一板1,1和玻璃基板块G的中心孔。接下来，玻璃基板块G被夹紧 从其内侧用磨石6倒角外边缘。

公开(公告)号：US06845635B2

公开(公告)日：2005-01-25

申请号：US09992961

申请日：2001-11-05

申请人： Takeo Watanabe ,  Takao Miwa ,  Satoshi Jibiki ,  Masamichi Kezuka ,  Kensuke Matsuno

发明人： Takeo Watanabe ,  Takao Miwa ,  Satoshi Jibiki ,  Masamichi Kezuka ,  Kensuke Matsuno

IPC分类号： B23K26/06 ,  B23K26/067 ,  B23K26/08 ,  C03B29/00 ,  C03B29/02 ,  C03C3/083 ,  C03C3/085 ,  C03C3/087 ,  C03C10/00 ,  C03C19/00 ,  C03C21/00 ,  C03C23/00 ,  G11B5/73 ,  G11B5/84 ,  G11B7/00 ,  G11B7/253 ,  G11B7/26 ,  C03B21/00

CPC分类号： C03C19/00 ,  B23K26/0604 ,  B23K26/0619 ,  B23K26/067 ,  B23K26/0823 ,  C03B29/00 ,  C03B29/02 ,  C03C23/0025 ,  G11B5/7315 ,  G11B5/8404 ,  G11B7/00 ,  G11B7/2531 ,  G11B7/26

摘要： There are provided a method of manufacturing a glass substrate for information recording media that allows the inner and outer peripheral edge surfaces of the glass substrate for information recording media to be smoothed easily and inexpensively, a glass substrate for information recording media manufactured using this method, and an information recording medium using this glass substrate. A donut-shaped glass disk for information recording media having an outer peripheral edge surface and an inner peripheral edge surface is prepared. At least one of the outer peripheral edge surface and the inner peripheral edge surface of the glass disk is smoothed by melt-heating to a temperature at or above the softening point of the glass by irradiating with at least one laser beam. As a result, at least one of the outer peripheral edge surface and the inner peripheral edge surface of the glass disk becomes smooth and rounded, and hence a polishing step used in a conventional method can be omitted, and moreover chamfering in a grinding step can also be omitted.

摘要翻译： 提供了一种制造用于信息记录介质的玻璃基板的方法，其允许用于信息记录介质的玻璃基板的内周边和外周边表面易于且廉价地平滑，使用该方法制造的用于信息记录介质的玻璃基板， 以及使用该玻璃基板的信息记录介质。 准备具有外周边缘面和内周边缘面的信息记录介质的环形玻璃盘。 通过用至少一个激光束照射，玻璃盘的外周边缘表面和内周边缘表面中的至少一个通过熔融加热至玻璃软化点之上或之上的温度来平滑。 结果，玻璃盘的外周边缘面和内周缘面中的至少一个变得光滑圆滑，因此可以省略常规方法使用的抛光步骤，而且在研磨步骤中可以进行倒角 也可以省略。

公开(公告)号：US20050223744A1

公开(公告)日：2005-10-13

申请号：US11149510

申请日：2005-06-10

申请人： Tamaki Horisaka ,  Kazuya Fujino ,  Kensuke Matsuno ,  Eiji Okuda

发明人： Tamaki Horisaka ,  Kazuya Fujino ,  Kensuke Matsuno ,  Eiji Okuda

IPC分类号： C03B29/02 ,  C03C23/00 ,  G11B5/73 ,  G11B5/84 ,  G11B7/253 ,  G11B7/26 ,  G11B11/105 ,  G11B23/00 ,  B32B3/02 ,  C03B29/00

CPC分类号： C03C23/0025 ,  G11B5/7315 ,  G11B5/8404 ,  G11B7/2531 ,  G11B7/26 ,  G11B11/10582 ,  G11B11/10586 ,  G11B23/0021 ,  Y10T428/218

摘要： A glass substrate for a data recording medium is disk-shaped and has a circular bore at the center portion. At least one of an inner circumferential end surface and an outer circumferential end surface is smooth. The smooth surface is formed by exposing at least one of the inner circumferential end surface and the outer circumferential end surface of a glass disk to a laser beam. During laser machining, the end surface of the glass disk that is exposed to the laser beam is heated and melted. Therefore, minute cracks, formed on the end surface of the glass disk before the laser machining, are eliminated. As a result, the strength of the glass substrate is maintained without a chemical strengthening treatment. This eliminates disadvantages caused by the chemical strengthening step.

摘要翻译： 用于数据记录介质的玻璃基板是盘形的，并且在中心部分具有圆形孔。 内周端面和外周端面中的至少一个是平滑的。 通过将玻璃盘的内周端面和外周端面中的至少一方暴露于激光束而形成光滑面。 在激光加工期间，暴露于激光束的玻璃盘的端面被加热熔化。 因此，在激光加工之前形成在玻璃盘的端面上的微小裂纹被消除。 结果，在不进行化学强化处理的情况下，维持玻璃基板的强度。 这消除了由化学强化步骤引起的缺点。