MY188163A - Annular glass blank, method for manufacturing annular glass blank, method for manufacturing annular glass substrate, and method for manufacturing magnetic-disk glass substrate - Google Patents

Annular glass blank, method for manufacturing annular glass blank, method for manufacturing annular glass substrate, and method for manufacturing magnetic-disk glass substrate

Info

Publication number
MY188163A
MY188163A MYPI2018701605A MYPI2018701605A MY188163A MY 188163 A MY188163 A MY 188163A MY PI2018701605 A MYPI2018701605 A MY PI2018701605A MY PI2018701605 A MYPI2018701605 A MY PI2018701605A MY 188163 A MY188163 A MY 188163A
Authority
MY
Malaysia
Prior art keywords
manufacturing
glass blank
annular glass
main surface
glass substrate
Prior art date
Application number
MYPI2018701605A
Inventor
Shuhei Azuma
Original Assignee
Hoya Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoya Corp filed Critical Hoya Corp
Publication of MY188163A publication Critical patent/MY188163A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B28D1/24—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising with cutting discs
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
    • C03B33/027—Scoring tool holders; Driving mechanisms therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/04—Cutting or splitting in curves, especially for making spectacle lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/09—Severing cooled glass by thermal shock
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers

Abstract

In processing for forming an annular glass blank (10B) from a plate- shaped glass blank (10A), an outer cutting line (11) is formed by rotating a first circular blade (3) relative to a main surface of the plate-shaped glass blank (10A) along the main surface at a first radius of gyration (R1), and an inner cutting line (12) is formed by rotating a second circular blade (4) along the main surface at a second radius of gyration (R2) that is shorter than the first radius of gyration (R1). A cutting blade edge (31) of the first circular blade (3) is provided with a plurality of first notches (32) in a circumferential direction at a first interval (C1), and a cutting blade edge (41) of the second circular blade (4) is provided with a plurality of second notches (42) in a circumferential direction at a second interval (C2). The first interval (C1) is smaller than the second interval (C2). The inner circumferential edge surface (14) and the outer circumferential edge surface (13) of the annular glass blank (10B) have a concentricity of 15 ?m or less. Also, a difference between a roundness of an outer circumferential shape (15A) of a first main surface (15) of the annular glass blank and a roundness of an outer circumferential shape (16A) of a second main surface (16) that is opposite to the first main surface (15) is 100 ?m or less. (Figure 1)
MYPI2018701605A 2015-12-28 2016-12-28 Annular glass blank, method for manufacturing annular glass blank, method for manufacturing annular glass substrate, and method for manufacturing magnetic-disk glass substrate MY188163A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2015256791 2015-12-28
JP2016064839 2016-03-29
PCT/JP2016/089203 WO2017115871A1 (en) 2015-12-28 2016-12-28 Annular glass blank, method for manufacturing annular glass blank, method for manufacturing annular glass substrate, and method for manufacturing glass substrate for magnetic disc

Publications (1)

Publication Number Publication Date
MY188163A true MY188163A (en) 2021-11-24

Family

ID=59224815

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI2018701605A MY188163A (en) 2015-12-28 2016-12-28 Annular glass blank, method for manufacturing annular glass blank, method for manufacturing annular glass substrate, and method for manufacturing magnetic-disk glass substrate

Country Status (5)

Country Link
JP (2) JP6385595B2 (en)
CN (2) CN110751961B (en)
MY (1) MY188163A (en)
SG (2) SG10201912471WA (en)
WO (1) WO2017115871A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG11202103948VA (en) * 2018-11-30 2021-05-28 Hoya Corp Method for manufacturing glass plate, method for chamfering glass plate, and method for manufacturing magnetic disk
JP7201808B2 (en) * 2019-06-28 2023-01-10 Hoya株式会社 Glass plate manufacturing method and magnetic disk manufacturing method
CN112397098B (en) * 2020-11-30 2021-11-02 北京中科开迪软件有限公司 Heating equipment for mother disc of blue-ray disc

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* Cited by examiner, † Cited by third party
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JP3632254B2 (en) * 1995-09-27 2005-03-23 日本板硝子株式会社 Foil cutter and brittle material plate cutting method
JP4342039B2 (en) * 1999-06-15 2009-10-14 三星ダイヤモンド工業株式会社 Glass scriber and scribing method
JP4421697B2 (en) * 1999-06-15 2010-02-24 三星ダイヤモンド工業株式会社 Break device
JP2004256391A (en) * 2004-05-18 2004-09-16 Beldex Corp Scribing method and apparatus
JP2006294170A (en) * 2005-04-13 2006-10-26 Toshiba Corp Disk device
TWI409232B (en) * 2005-07-06 2013-09-21 Mitsuboshi Diamond Ind Co Ltd Method for manufacturing scratches for brittle materials
JP5467707B2 (en) * 2006-03-24 2014-04-09 Ｈｏｙａ株式会社 Manufacturing method of glass substrate for magnetic disk and manufacturing method of magnetic disk
JP4942428B2 (en) * 2006-09-01 2012-05-30 Ｈｏｙａ株式会社 Manufacturing method and processing apparatus of glass substrate for magnetic disk, and manufacturing method of magnetic disk
US7757380B2 (en) * 2006-11-10 2010-07-20 Hitachi Global Storage Technologies Netherlands B.V. Methods for the manufacture of notched trailing shields
JP4748115B2 (en) * 2007-06-12 2011-08-17 コニカミノルタオプト株式会社 Glass substrate for magnetic recording medium and magnetic recording medium
JP5465456B2 (en) * 2009-03-27 2014-04-09 ダブリュディ・メディア・シンガポール・プライベートリミテッド Magnetic disk
JP5126351B2 (en) * 2009-12-25 2013-01-23 旭硝子株式会社 Disk-shaped glass substrate and method for manufacturing disk-shaped glass substrate
JP5902914B2 (en) * 2010-11-02 2016-04-13 Hoya株式会社 Manufacturing method of glass substrate for magnetic disk
JP5844610B2 (en) * 2010-11-02 2016-01-20 Hoya株式会社 Manufacturing method of glass substrate for magnetic disk
JP5335983B2 (en) * 2011-10-05 2013-11-06 Ｈｏｙａ株式会社 Glass substrate for magnetic disk and magnetic recording medium
CN104205218A (en) * 2012-03-30 2014-12-10 旭硝子株式会社 Supporting shaft, method for polishing end surface of magnetic disk glass substrate, and method for manufacturing magnetic disk glass substrate
MY166439A (en) * 2013-02-22 2018-06-27 Hoya Corp Glass substrate for magnetic disk and magnetic disk
JP2014188729A (en) * 2013-03-26 2014-10-06 Mitsuboshi Diamond Industrial Co Ltd Scribing wheel, scribing device, and method of manufacturing scribing wheel
WO2014178417A1 (en) * 2013-04-30 2014-11-06 Hoya株式会社 Method for manufacturing glass substrate for magnetic disc, magnetic-disc manufacturing method, and apparatus for polishing end surface of glass substrate for magnetic disc
JP2015069668A (en) * 2013-09-29 2015-04-13 Hoya株式会社 Manufacturing method of magnetic disk glass substrate and manufacturing method of magnetic disk
JP2015154871A (en) * 2014-02-21 2015-08-27 Hoya株式会社 endoscope insertion assisting device

Also Published As

Publication number Publication date
SG11201804418PA (en) 2018-06-28
CN110751961B (en) 2021-10-26
JP2019011242A (en) 2019-01-24
JPWO2017115871A1 (en) 2018-08-30
CN108292510B (en) 2019-11-01
CN108292510A (en) 2018-07-17
SG10201912471WA (en) 2020-02-27
CN110751961A (en) 2020-02-04
JP6884736B2 (en) 2021-06-09
JP6385595B2 (en) 2018-09-05
WO2017115871A1 (en) 2017-07-06

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