Document Type and Number:
Japanese Patent JP4935688
Kind Code:
B2
Abstract:
To provide a next generation optical recording medium having two or more information layers excellent in reproduction durability and a wide margin for recording strategy even when an Sb-based eutectic material is used as a material of a recording film of the translucent information layer.
The translucent information layer 16 of the optical recording medium 10 is configured to include a recording film 18 formed of a phase change material SbxGeyInzwhere 5≤y≤15 and 4≤z≤15 are satisfied. The recording film 18 further includes Te in an atomic ratio of a, provided that x+y+z+a=100 and 4≤a≤15 are satisfied. An interface layer 36 formed of a ZrO2-Cr2O3film having a thickness of 2 nm or more and 10 nm or less is provided on the laser beam incident side of the recording film 18. When the compositional ratio of the ZrO2-Cr2O3film is given by ZrO2:Cr2O3=B:C (mol%), 20≤B≤90, 10≤C≤80, and B+C=100 are satisfied.
COPYRIGHT: (C)2009,JPO&INPIT
Inventors:
Hiroshi Shinkai
Tatsuya Kato
Masanori Kosuda
High Saki Kanshi
Hideki Hirata
Utsunomiya Hajime
Application Number:
JP2008011000A
Publication Date:
May 23, 2012
Filing Date:
January 21, 2008
Assignee:
tdk Corporation
International Classes:
B41M5/26; G11B7/24; G11B7/24035; G11B7/24038; G11B7/24062; G11B7/243; G11B7/2433; G11B7/254; G11B7/257
Domestic Patent References:
| JP2006277839A | | | | |
| JP2006286043A | | | | |
| JP2004528673A | | | | |
| JP2003335064A | | | | |
| JP2006031803A | | | | |
| JP2006286176A | | | | |
Attorney, Agent or Firm:
Keisuke Matsuyama
Satoshi Takaya
Tsuyoshi Makino
