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:
Oct. 25, 2022
Filed:
Oct. 25, 2019
Uacj Corporation, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Takuya Murata, Tokyo, JP;
Kotaro Kitawaki, Tokyo, JP;
Makoto Yonemitsu, Tokyo, JP;
Hideyuki Hatakeyama, Tokyo, JP;
Ryo Sakamoto, Tokyo, JP;
Hiroki Ota, Tokyo, JP;
UACJ CORPORATION, Tokyo, JP;
FURUKAWA ELECTRIC CO., LTD., Tokyo, JP;
Abstract
An aluminum alloy substrate for a magnetic disk including an aluminum alloy containing 0.1 to 3.0 mass % of Fe, 0.005 to 1.000 mass % of Cu, and 0.005 to 1.000 mass % of Zn, with a balance of Al and inevitable impurities, wherein in an outer peripheral surface thereof, the number of holes having maximum diameters of 10 μm or more is 200/mmor less, an aluminum alloy base disk for a magnetic disk and a magnetic disk, using the aluminum alloy substrate, and methods for manufacturing these.