Title:
【発明の名称】光学情報記録媒体の製造方法、およびこの方法で製造された光学情報記録媒体
Document Type and Number:
Japanese Patent JP3185890
Kind Code:
B2
Abstract:
An optical information recording medium which can eliminate the necessity for the initialization process. A crystallization assisted layer (3) comprising a given material is formed over a substrate (1) on one side thereof, and a recording layer (4) comprising a Ge-Sb-Te alloy is formed directly on the layer (3). Since the recording layer (4) crystallizes immediately after film formation, no initialization process is necessary for the optical information recording medium obtained. Examples of the material of the crystallization assisted layer firstly include materials having a face-centered cubic lattice system crystal structure. Examples thereof secondly include tellurium-free materials having a rhombohedral lattice system crystal structure. An especially preferred crystallization assisted layer is a discontinuous island-like film made of a material comprising bismuth and/or a bismuth compound. Incorporation nitrogen into the crystallization assisted layer provides an optical information recording medium which need not be initialized and has excellent overwrite cyclabiity.
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Inventors:
Shuichiro Ogawa
Keigo Takeguchi
Fujii Masaru
Keigo Takeguchi
Fujii Masaru
Application Number:
JP54373898A
Publication Date:
July 11, 2001
Filing Date:
April 15, 1998
Export Citation:
Assignee:
ASAHI KASEI KABUSHIKI KAISHA
International Classes:
G11B7/243; G11B7/257; G11B7/26; (IPC1-7): G11B7/26; C23C14/34; G11B7/24
Domestic Patent References:
| JP9161316A |
Attorney, Agent or Firm:
Tetsuya Mori (2 others)
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