公开(公告)号：WO2015046543A1

公开(公告)日：2015-04-02

申请号：PCT/JP2014075966

申请日：2014-09-29

Applicant: HOYA CORP

Inventor： YOSHIKAWA HIRONORI

IPC: B24D11/00 ,  B24D3/00 ,  B24D3/28 ,  G11B5/84

CPC classification number: G11B5/8404 ,  B24B7/228 ,  B24B37/245

Abstract: The present invention provides a method whereby not only the machining speed can be improved during a grinding process utilizing a stationary grinding wheel, but stable grinding can also be enabled. In the present invention, during a grinding process for grinding a main surface of a glass substrate, the main surface of the glass substrate is ground by using a grinding tool that has grinding abrasive grains, a binding material for binding the grinding abrasive grains together, and dispersed grains that are harder than the binding material yet softer than the grinding abrasive grains, wherein the grinding abrasive grains and the dispersed grains are bound together in a dispersed state in the binding material.

Abstract translation: 本发明提供一种方法，其不仅可以在利用固定砂轮的研磨过程中提高加工速度，而且可以实现稳定的研磨。 在本发明中，在研磨玻璃基板的主表面的研磨工序中，通过使用具有研磨磨粒的研磨工具，将研磨磨粒结合在一起的粘结材料研磨玻璃基板的主面， 并且分散的颗粒比所述粘合材料硬，但比研磨磨粒更软，其中研磨磨粒和分散的颗粒以分散状态结合在粘合材料中。

公开(公告)号：SG186602A1

公开(公告)日：2013-01-30

申请号：SG2012087581

申请日：2008-09-25

Applicant: HOYA CORP

Inventor： SHIGETA FUMIHIKO ,  YOSHIKAWA HIRONORI ,  MIYAMOTO TAKEMI ,  TAMAKI MASANORI ,  TSUCHIYA HIROSHI

Abstract: METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISC AND METHOD FOR MANUFACTURING MAGNETIC DISCThe invention relates to a manufacturing method of a glass substrate for processing a mirror-smooth plate glass (3) having a mirror-smooth principal surface, to a desired flatness and surface roughness by using a diamond sheet (10) of fixed abrasive grains. As pretreatment, the surface of the mirror-smooth plate glass (3) is roughened by a mechanical method or a chemical method until the polishing action of the diamond sheet (10) is sufficiently applicable. Then, by using the diamond sheet (10), the surface of the mirror-smooth plate glass (3) is processed to a desired plate thickness and flatness.Selected Drawings Fig. 2

公开(公告)号：SG11201503250RA

公开(公告)日：2015-06-29

申请号：SG11201503250R

申请日：2013-10-31

Applicant: HOYA CORP

Inventor： FUKADA JUNPEI ,  YOSHIKAWA HIRONORI

IPC: G11B5/84

Abstract: The invention provides a method for manufacturing a glass substrate for a magnetic disk, said method reducing the time in which a lapping process by means of fixed abrasive grains cannot be performed, such that a high quality glass substrate can be produced not only without slowing down the processing speed, but also while keeping the surface roughness of the processed surface thereof to a minimum. In the invention, the method includes a lapping process of lapping a main surface of a glass substrate using a lubricant and a surface plate in which fixed abrasive grains including diamond particles are disposed on a lapping surface. The glass substrate is a glass substrate in which the main surface is a mirror surface. The lapping process includes a first stage of abrading the surface of the glass substrate with a load higher than in lapping, and a second stage of lapping the surface of the glass substrate with a lower load than in the first stage. The first stage and second stage are performed using the same device.

公开(公告)号：MY176672A

公开(公告)日：2020-08-19

申请号：MYPI2016701094

申请日：2014-09-29

Applicant: HOYA CORP

Inventor： YOSHIKAWA HIRONORI

Abstract: The present invention provides a method by which it is possible to increase a processing speed in grinding processing using fixed abrasive particles, and to perform stable grinding processing. With the present invention, in grinding processing for grinding a main surface of a glass substrate (10), the glass substrate main surface is ground using a grinding tool that includes grinding abrasive particles, a bonding material for bonding the grinding abrasive particles, and dispersion particles that are harder than the bonding material and softer than the grinding abrasive particles, a ratio of an average particle diameter of the dispersion particles with respect to an average particle diameter of the grinding abrasive particles falling within the range of 0.8 to 1.2, the grinding abrasive particles being assembled abrasive particles (3) in which a plurality of grinding abrasive particles are bonded with a fixing material, the grinding abrasive particles and dispersion particles being dispersed and bonded in the bonding material.

公开(公告)号：JP2007090452A

公开(公告)日：2007-04-12

申请号：JP2005279613

申请日：2005-09-27

Applicant: Hoya Corp ,  Hoya株式会社

Inventor： YOSHIKAWA HIRONORI

IPC: B24B37/08 ,  C03C19/00 ,  G11B5/84

Abstract: PROBLEM TO BE SOLVED: To provide a large amount of glass substrates for magnetic discs and magnetic discs having stable quality inexpensively by providing a manufacturing method of the glass substrate for the magnetic disc, which may simply polish the principal plane of the glass substrate to have a very smooth surface. SOLUTION: In grinding using a planetary gear mechanism, a part of a glass disc 7 held on a carrier 13 is relatively moved to a lower surface plate 3 and an upper surface plate 4, and in that process, at least a part of the surface is passed on the outer peripheral side from the outer edges of the respective surface plates 3, 4. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了通过提供用于磁盘的玻璃基板的制造方法，可以廉价地提供大量具有稳定质量的磁盘和磁盘的玻璃基板，其可以简单地抛光玻璃的主平面 基材具有非常光滑的表面。 解决方案：在使用行星齿轮机构的研磨中，保持在托架13上的玻璃盘7的一部分相对移动到下表面板3和上表面板4，并且在该过程中，至少一部分 的表面在各个表面板3,4的外边缘的外周侧上通过。（C）2007，JPO＆INPIT

公开(公告)号：JP2000288920A

公开(公告)日：2000-10-17

申请号：JP9390099

申请日：1999-03-31

Applicant: HOYA CORP

Inventor： YOSHIKAWA HIRONORI ,  TAKANO MASAO ,  MIYAMOTO TAKEMI

IPC: B24B7/24 ,  B24B37/27 ,  B24B37/28 ,  G11B5/84 ,  G11B7/26 ,  B24B37/04

Abstract: PROBLEM TO BE SOLVED: To eliminate the danger of generating a foreign matter during polishing by constituting a work holding part and a gear part by use of different members. SOLUTION: This polishing carrier 1 is formed of a disc-like work holding part 2 and a gear part 3 fitted and fixed to the circumference of the work holding part 2. According to this structure, generation of a foreign matter by the wear of gear accompanying the meshing of the gear part 3 formed on the circumferential part of the polishing carrier 1 with the internal gear and sun gear of a polishing device can be prevented to eliminate the damage of a glass substrate surface. Since the work holding part 2 for holding the glass substrate and the gear part 3 are formed of different members, the work holding part 2 is not required to have so much high strength when the gear part 3 is formed of a sufficiently strong material. Therefore, the material or thickness can be relatively freely set.

公开(公告)号：JP2008254166A

公开(公告)日：2008-10-23

申请号：JP2008059328

申请日：2008-03-10

Applicant: Hoya Corp ,  Hoya株式会社

Inventor： YOSHIKAWA HIRONORI ,  TSUCHIYA HIROSHI ,  TAMAOKI MASANORI

IPC: B24B53/02 ,  B24B53/095 ,  B24B53/12 ,  G11B5/84

Abstract: PROBLEM TO BE SOLVED: To manufacture a glass substrate for a magnetic disk superior in flatness by effectively and appropriately correcting waviness of a surface plate stuck with fixed abrasive grain, and to manufacture a magnetic disk from such glass substrate for a magnetic disk. SOLUTION: After performing a grinding process for grinding a main surface of the glass substrate using the surface plate with the fixed abrasive grain comprising diamond particles being arranged on a grinding surface, a carrier 110 used for grinding and a glass correction ring 202A are replaced with each other, and a process similar to the grinding process is performed. Thus, the waviness of the grinding surface of the surface plate is eliminated and flatness is corrected. The glass correction ring 202A acts as a planetary gear retained by carriers 210A, 210B having a gear on the outer periphery, is configured that glass is stuck on and beneath metal cores 220A, 220B, and has a correcting face thicker than the glass substrate to be ground. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：通过有效且适当地校正粘附有固定磨粒的表面板的波纹来制造平坦度优异的磁盘用玻璃基板，并且从这种用于磁盘的玻璃基板制造磁盘 。 解决方案：在使用具有包括金刚石颗粒的固定磨料颗粒布置在研磨表面上的表面板进行用于研磨玻璃基板的主表面的研磨工艺之后，用于研磨的载体110和玻璃校正环202A 彼此替换，并且执行类似于研磨过程的过程。 因此，消除了表面板的磨削表面的波纹，并且校正了平坦度。 玻璃校正环202A用作在外周具有齿轮的载体210A，210B保持的行星齿轮，被配置为将玻璃粘附在金属芯220A，220B之上和之下，并且具有比玻璃基板更厚的校正面 被磨碎 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2006338816A

公开(公告)日：2006-12-14

申请号：JP2005164161

申请日：2005-06-03

Applicant: Hoya Corp ,  Hoya株式会社

Inventor： YOSHIKAWA HIRONORI ,  KAJIMA RYUICHI

IPC: G11B5/84 ,  C03B33/06 ,  C03C17/06 ,  C03C19/00

Abstract: PROBLEM TO BE SOLVED: To provide a glass substrate for a magnetic disk having satisfactory shape of an end surface part, parallelism of both principal surfaces and uniformity of plate thickness at a low cost and to provide the inexpensive glass substrate for the magnetic disk and the magnetic disk in large amounts. SOLUTION: In a manufacturing method of the glass substrate for the magnetic disk including a step for forming glass disks by cutting a cylindrical glass base material 3 vertically to the center axis thereof, a side surface part of the cylindrical glass base material 3 is grained or satin finished when the step is performed. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了提供一种具有令人满意的端面部分形状的磁盘的玻璃基板，两个主表面的平行度和板厚度的均匀性，并且为了提供便宜的用于磁性的玻璃基板 磁盘和磁盘大量。 解决方案：在用于磁盘的制造方法中，包括通过将圆柱形玻璃基材3垂直于其中心轴线切割而形成玻璃盘的步骤，圆筒形玻璃基材3的侧表面部分 当执行步骤时，粒状或缎纹完成。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2000288919A

公开(公告)日：2000-10-17

申请号：JP9389199

申请日：1999-03-31

Applicant: HOYA CORP

Inventor： YOSHIKAWA HIRONORI

IPC: B24B7/24 ,  B24B37/27 ,  B24B37/28 ,  G11B5/84 ,  G11B7/26 ,  B24B37/04

Abstract: PROBLEM TO BE SOLVED: To provide a polishing carrier having high durability and low manufacturing costs, a polishing method, and a method for manufacturing an information recording medium substrate. SOLUTION: In a polishing carrier 1 provided with a polished article holding portion 2 having a plurality of holding holes 2a for holding an article to be polished, and a gear portion 3 provided in the outer periphery of the polished article holding portion 2, coincidence is prevented between straight lines A and B: the straight line A passing through the center of an at least holding hole disposed in the outermost periphery and the center of the polished article holding portion, and the straight line B passing through the center of a holding hole adjacent to the holding hole positioned in the outermost periphery and the center of the polished article holding portion. Alternatively, a distance between the holding holes 2a disposed in the outermost. peripheral side and/or a distance between the holding hole 2a disposed in the outermost periphery and the gear portion 3 is set larger than a distance between the plurality of the holding holes 2a. The concentration of stress applied to the polished article holding portion 2 in the particular part of the holding portion 2 is thereby prevented, and thus the particular part is prevented from being broken.

公开(公告)号：JP2011014177A

公开(公告)日：2011-01-20

申请号：JP2009154508

申请日：2009-06-30

Applicant: Hoya Corp ,  Hoya株式会社

Inventor： YOSHIKAWA HIRONORI ,  TAMAOKI MASANORI

IPC: G11B5/84 ,  B24B21/00 ,  B24B53/00 ,  B24B53/02 ,  C03C19/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass substrate for a magnetic disk, wherein grinding work can be applied so that fluctuation of plate thicknesses between batches is reduced by using a fixed abrasive sheet corrected to a desired surface roughness.SOLUTION: The method for manufacturing the glass substrate for the magnetic disk includes a surface grinding step of adjusting flatness of a principal surface of the glass substrate for the magnetic disk using a sheet having a fixed abrasive, wherein surface grinding is performed using the sheet corrected by using a polishing liquid containing a free abrasive containing zirconia and a ring made of cast iron, in the surface grinding step.

Abstract translation: 要解决的问题：为了提供一种用于制造用于磁盘的玻璃基板的方法，其中可以应用磨削加工，以便通过使用校正到所需表面粗糙度的固定磨料片来减小批次之间的板厚度的波动。解决方案： 制造磁盘用玻璃基板的方法包括使用具有固定磨料的片材来调整用于磁盘的玻璃基板的主面的平面度的表面研磨工序，其中，使用通过使用 在表面研磨步骤中含有含有氧化锆的游离磨料和由铸铁制成的环的抛光液。