SG11201405695XA - Magnetic-disk glass substrate, magnetic disk, magnetic-disk drive device - Google Patents
Magnetic-disk glass substrate, magnetic disk, magnetic-disk drive deviceInfo
- Publication number
- SG11201405695XA SG11201405695XA SG11201405695XA SG11201405695XA SG11201405695XA SG 11201405695X A SG11201405695X A SG 11201405695XA SG 11201405695X A SG11201405695X A SG 11201405695XA SG 11201405695X A SG11201405695X A SG 11201405695XA SG 11201405695X A SG11201405695X A SG 11201405695XA
- Authority
- SG
- Singapore
- Prior art keywords
- lllll
- magnetic disk
- tokyo
- magnetic
- glass substrate
- Prior art date
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
- G11B5/62—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
(i2) mwu ft iz s-5 iv x m £ titz s issaj n d9) mm IHMMi (43) m&'&m a 2013 ^ 10 ^ 3 0(03.10.2013) WIPO PCT I (10) WO 2013/146089 A1 (51) G11B 5/73 (2006.01) (21) (22) (25) (26) 4>§fl(£> s In: G1 IB 5/84 (2006.01) PCT/JP2013/055592 2013 2 M 28 0(28.02.2013) (30) fiBfefix— $: 4#Jg| 2012-083043 2012 ^ 3 M 30 8(30.03.2012) (71) ttiJUA (7fel5£P& < ^T(7)Jii/E!HI-'3l T): N HO Y A (HOYA CORPORATION) [JP/JP]; T 1618525 Hi?vt|5§Tfi |E 4^31 \"n 2TI7#5^ Tokyo (JP). 7t\"x — -V Xf -f X <7 7 -f U t° > -OH-TKU-T'V K(HOYA GLASS DISK PHILIPPINES, INC.) [PH/PH]; 4 0 2 4 If—7^-t =f>J J l\ — <7 X^V-V ;i/ I^XTK—h ^P-tr>vv>y v /—> 'f — X h 4 Is f K—ZL — 1 1 1 Laguna (PH). (72) fccfci; (71) ttiJjiA (TR II Ic OIVT (£><?*): HTK {^(KOSHIM- IZU, Osamu) [JP/JP]; T 1618525 Ki?vt|5§Tfi IE cf 3 M p2TI 7 # 5 HO YA*fc5££ttfa Tokyo (JP). j#(ONISHI, Masaru) [JP/JP]; T 1618525 H«MfilE^li-&2Tg 7# 5-^ HOYA S # # fa Tokyo (JP). # >p (KANEKO, Shoji) [JP/PH]; \"7 V — ~t 4024 if — -\"? > \"7 7 — j- 7 X^is-YJl, I<7X TK— h ^P-t V\"— > •<— Ah JP TK — -~ 3 1 1 1 -r-fX^ 7-r u tf > •<>3-^u-7 v , K fa Laguna (PH). (74) ft!A: • T4 A (GLOBAL IP TOKYO); T 1600023 IE Efiffil 8 T @ 3 3 § O ~h — /• Jls I I Tokyo (JP). (8i) Jt^ia (^ro&i^PBy, ^T©ffi®a)@faffi IS nJ f b ): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, [mn%] (54) Title: GLASS SUBSTRATE FOR MAGNETIC DISK, MAGNETIC DISK, MAGNETIC DISK DRIVE DEVICE (54) : WM.^T 4 X <7 \"7 XSflju fiMflT' 1 <\" X <7 „ {SIHx <\" X <7 R \"7'f 3?^ iB (57) Abstract: Provided are a glass substrate for a magnetic disk, a magnetic disk, and a magnetic disk drive device, with which fluttering does not occur during high-speed rotation, and the generation of particles during manufacture is suppressed. This glass substrate for a magnetic disk has pair a of main sur faces, two sidewall surfaces that form an inner hole and an external shape, and chamfered surfaces between the main surfaces and sidewall surfaces, and the sidewall surface forming the inner hole has a re cess. (57)^: 7 V $ U Lit < ft 3 £ ? Ic L tzmn.^rJ X WSa.-f 4 X<7 „ flSi.-r'f x<7 *f§0JO) ®<t, mi&xfmzzmmt& 2o©fiijs *TU fafL£«J$-f<g>fliJS®jb<IH]^gP£*r 00 o x-x m i-H o CJ O & X-X Expanded cross-section WO 2013/146089 A11 lllll llllllll II llllll III lllll lllll lllll III III III lllll lllll llll llll lllll lllll lllllll llll llll IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) 11^ nlfb): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), 3.— V T (AM, AZ, BY, KG, KZ, RU, TJ, TM), 3 — • V / 'V (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). - (&&£ 21 &(3))
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012083043 | 2012-03-30 | ||
PCT/JP2013/055592 WO2013146089A1 (en) | 2012-03-30 | 2013-02-28 | Glass substrate for magnetic disk, magnetic disk, magnetic disk drive device |
Publications (1)
Publication Number | Publication Date |
---|---|
SG11201405695XA true SG11201405695XA (en) | 2014-12-30 |
Family
ID=49259364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG11201405695XA SG11201405695XA (en) | 2012-03-30 | 2013-02-28 | Magnetic-disk glass substrate, magnetic disk, magnetic-disk drive device |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP5870187B2 (en) |
SG (1) | SG11201405695XA (en) |
WO (1) | WO2013146089A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
MY196313A (en) | 2017-06-30 | 2023-03-24 | Hoya Corp | Substrate For Magnetic Disks, and Magnetic Disk |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62293515A (en) * | 1986-06-12 | 1987-12-21 | Mitsubishi Electric Corp | Production of magnetic disk |
JPH06248451A (en) * | 1993-02-24 | 1994-09-06 | Hitachi Ltd | Substrate holder |
JP2009259377A (en) * | 2008-03-27 | 2009-11-05 | Fujifilm Corp | Magnetic recording medium and method for making magnetic recording medium |
JP2010131695A (en) * | 2008-12-03 | 2010-06-17 | Fuji Electric Device Technology Co Ltd | Disk material polishing method, disk material polishing device, disk material, substrate for magnetic disk, and magnetic disk |
-
2013
- 2013-02-28 JP JP2014507585A patent/JP5870187B2/en active Active
- 2013-02-28 WO PCT/JP2013/055592 patent/WO2013146089A1/en active Application Filing
- 2013-02-28 SG SG11201405695XA patent/SG11201405695XA/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP5870187B2 (en) | 2016-02-24 |
JPWO2013146089A1 (en) | 2015-12-10 |
WO2013146089A1 (en) | 2013-10-03 |
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