Title:
MAGNETIC DISK SUBSTRATE, METHOD FOR MANUFACTURING SAME AND MAGNETIC DISK
Document Type and Number:
WIPO Patent Application WO/2019/171675
Kind Code:
A1
Abstract:
This magnetic disk substrate is provided with an aluminum alloy substrate and a base plating layer formed on a surface of the aluminum alloy substrate. For a boundary region formed between the base plating layer and the aluminum alloy substrate, the maximum value (I(1)Fe (max)) of the emission intensity of Fe at a specific boundary region (D(1)I(50-84)) in which the emission intensity of Al is 50% to 84% of the average value of the emission intensity of Al within the aluminum alloy substrate is greater than the average value (I(1)Fe(ave)) of the emission intensity of Fe within the aluminum alloy substrate, as measured by glow discharge optical emission spectrometry carried out in a depth direction from a surface of the magnetic disk substrate.
Inventors:
MURATA TAKUYA (JP)
KITAWAKI KOTARO (JP)
YONEMITSU MAKOTO (JP)
FUJII YASUO (JP)
SAKAMOTO RYO (JP)
HATAKEYAMA HIDEYUKI (JP)
TODA SADAYUKI (JP)
KITAWAKI KOTARO (JP)
YONEMITSU MAKOTO (JP)
FUJII YASUO (JP)
SAKAMOTO RYO (JP)
HATAKEYAMA HIDEYUKI (JP)
TODA SADAYUKI (JP)
Application Number:
PCT/JP2018/043879
Publication Date:
September 12, 2019
Filing Date:
November 28, 2018
Export Citation:
Assignee:
UACJ CORP (JP)
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA ELECTRIC CO LTD (JP)
International Classes:
G11B5/73; C22C21/00; C22F1/04; G11B5/84; C22F1/00
Domestic Patent References:
| WO2016068293A1 | 2016-05-06 |
Foreign References:
| JP2018005968A | 2018-01-11 | |||
| JPH05247659A | 1993-09-24 | |||
| JPH04143292A | 1992-05-18 | |||
| JP2006063438A | 2006-03-09 |
Attorney, Agent or Firm:
KIMURA MITSURU (JP)
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