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1. (WO2017188320) SUBSTRATE FOR MAGNETIC DISK
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Pub. No.: WO/2017/188320 International Application No.: PCT/JP2017/016563
Publication Date: 02.11.2017 International Filing Date: 26.04.2017
IPC:
C22C 21/00 (2006.01) ,G11B 5/73 (2006.01) ,C22F 1/00 (2006.01) ,C22F 1/04 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
21
Alloys based on aluminium
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62
Record carriers characterised by the selection of the material
73
Base layers
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
Applicants:
株式会社UACJ UACJ CORPORATION [JP/JP]; 東京都千代田区大手町一丁目7番2号 1-7-2, Otemachi, Chiyoda-ku, Tokyo 1000004, JP
古河電気工業株式会社 FURUKAWA ELECTRIC CO., LTD. [JP/JP]; 東京都千代田区丸の内2丁目2番3号 2-3, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008322, JP
Inventors:
中村 肇宏 NAKAMURA, Toshihiro; JP
中山 賢 NAKAYAMA,Takashi; JP
今川 公恵 IMAKAWA, Kimie; JP
熊谷 航 KUMAGAI, Wataru; JP
戸田 貞行 TODA, Sadayuki; JP
北脇 高太郎 KITAWAKI, Kotaro; JP
村田 拓哉 MURATA, Takuya; JP
松居 悠 MATSUI, Yu; JP
米光 誠 YONEMITSU, Makoto; JP
畠山 英之 HATAKEYAMA, Hideyuki; JP
Agent:
飯田 敏三 IIDA, Toshizo; JP
赤羽 修一 AKABA, Shuichi; JP
Priority Data:
2016-08871927.04.2016JP
2016-09743913.05.2016JP
Title (EN) SUBSTRATE FOR MAGNETIC DISK
(FR) SUBSTRAT POUR DISQUE MAGNÉTIQUE
(JA) 磁気ディスク用基板
Abstract:
(EN) The present invention provides an aluminum alloy substrate for a magnetic disk in which disk fluttering is less likely to occur. This aluminum alloy substrate for a magnetic disk is characterized in that the sum of the circumferential length of second phase particles having a maximum diameter of 4-30 µm in a metal structure is not less than 10 mm/mm2.
(FR) La présente invention concerne un substrat en alliage d'aluminium pour disque magnétique avec lequel le flottement du disque est moins susceptible de se produire. Ce substrat en alliage d'aluminium pour disque magnétique est caractérisé en ce que la somme de la longueur circonférentielle des particules de seconde phase ayant un diamètre maximal de 4 à 30 µm dans une structure métallique n'est pas inférieure à 10 mm/mm2.
(JA) 本発明は、ディスク・フラッタの発生が少ない磁気ディスク用アルミニウム合金基板を提供するものである。 本発明に係る磁気ディスク用アルミニウム合金基板は、金属組織における最長径4μm以上30μm以下の第二相粒子の周囲長の合計が10mm/mm以上であるという特徴を有する。
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Designated States: 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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, 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, SA, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)