Invention Grant
- Patent Title: Aluminum alloy disc blank for magnetic disc and magnetic disc
-
Application No.: US18339994Application Date: 2023-06-22
-
Publication No.: US12087342B2Publication Date: 2024-09-10
- Inventor: Kotaro Kitawaki , Ryo Sakamoto , Wataru Kumagai , Hideyuki Hatakeyama , Ryohei Yamada , Shinpei Todo , Toshihiro Nakamura
- Applicant: UACJ CORPORATION , FURUKAWA ELECTRIC CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: UACJ CORPORATION,FURUKAWA ELECTRIC CO., LTD.
- Current Assignee: UACJ CORPORATION,FURUKAWA ELECTRIC CO., LTD.
- Current Assignee Address: JP Tokyo; JP Tokyo
- Agency: Ruggiero McAllister and McMahon LLC
- Priority: JP 20215207 2020.12.24
- Main IPC: G11B5/73
- IPC: G11B5/73 ; G11B5/84 ; G11B5/858
Abstract:
An aluminum alloy disc blank for a magnetic disc made of an aluminum alloy containing Fe: 0.005 to 1.800 mass % with the balance being Al and inevitable impurities, wherein a flatness change of the aluminum alloy disc blank for a magnetic disc when the aluminum alloy disc blank for a magnetic disc is held in the atmosphere at 50° C. or lower for 336 hours is 2.0 μm or less.
Public/Granted literature
- US20230335161A1 ALUMINUM ALLOY DISC BLANK FOR MAGNETIC DISC AND MAGNETIC DISC Public/Granted day:2023-10-19
Information query
IPC分类:
