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Title:
OPTICAL RECORDING MEDIUM, METHOD FOR PRODUCING SAME AND RECORDING LAYER FOR OPTICAL RECORDING MEDIA
Document Type and Number:
WIPO Patent Application WO/2017/175580
Kind Code:
A1
Abstract:
This optical recording medium is provided with: two or more recording layers; and a light irradiation surface that is irradiated with light for recording information signals in the two or more recording layers. At least one layer other than the layer furthest from the light irradiation surface among the two or more recording layers contains an oxide of metal A, an oxide of metal B and an oxide of metal C. The metal A is composed of at least one element selected from among W, Mo and Zr; the metal B is Mn; and the metal C is composed of at least one element selected from among Cu, Ag and Ni. The ratios of the metal A, the metal B and the metal C satisfy the relational expression 0.46 ≤ x1 (provided that x1 = a/(b + 0.8c), wherein: a represents the atomic ratio (atom%) of the metal A relative to the total of the metal A, the metal B and the metal C; b represents the atomic ratio (atom%) of the metal B relative to the total of the metal A, the metal B and the metal C; and c represents the atomic ratio (atom%) of the metal C relative to the total of the metal A, the metal B and the metal C).

Inventors:
TABATA HIROSHI (JP)
Application Number:
PCT/JP2017/011322
Publication Date:
October 12, 2017
Filing Date:
March 22, 2017
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
G11B7/2433; G11B7/007; G11B7/2403; G11B7/24038; G11B7/24073; G11B7/26
Domestic Patent References:
WO2013183277A12013-12-12
WO2012120817A12012-09-13
WO2015083337A12015-06-11
Foreign References:
JP2014026704A2014-02-06
JP2013086336A2013-05-13
Attorney, Agent or Firm:
SUGIURA, Masatomo et al. (JP)
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