The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2020
Filed:
May. 23, 2016
Uacj Corporation, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Kotaro Kitawaki, Tokyo, JP;
Takuya Murata, Tokyo, JP;
Akira Hibino, Tokyo, JP;
Naoki Kitamura, Tokyo, JP;
Masanobu Onishi, Tokyo, JP;
Hideki Takahashi, Tokyo, JP;
Satoshi Yamazaki, Tokyo, JP;
Sadayuki Toda, Tokyo, JP;
UACJ Corporation, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The present invention provides: an aluminum alloy substrate for magnetic discs with excellent plating surface smoothness; a manufacturing method therefor; and a magnetic disc using said aluminum alloy substrate for magnetic discs. The present invention is an aluminum alloy substrate for magnetic discs, a manufacturing method therefor, and a magnetic disc using said aluminum alloy substrate for magnetic discs, the aluminum alloy substrate being characterized in being obtained from an aluminum alloy containing Mg: 2.0-8.0 mass % ('%' below), Be: 0.00001-0.00200%, Cu: 0.003-0.150%, Zn: 0.05-0.60%, Cr: 0.010-0.300%, Si: 0.060% or less, Fe: 0.060% or less, the balance being obtained from Al and unavoidable impurities.