Patent SG-11201405695X-A (SG)
Title: Magnetic-disk glass substrate, magnetic disk, magnetic-disk drive device
Inventor: KOSHIMIZU OSAMU
IPC: G11B5/84
Filed: 2013-02-28
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))