Title:
【発明の名称】光情報記録媒体
Document Type and Number:
Japanese Patent JP2596901
Kind Code:
B2
Abstract:
PURPOSE:To prevent the oxidation corrosion of a thin recording film and to enable exact recording and reproducing of information for a long period of time even when the recording medium is rested in high-temp. and high-humidity environment by forming the thin recording film of a thin film which consists essentially of GeTe added with nitrogen and adjusting the nitrogen content in the optical thin recording film to the ratio lower than the average nitrogen content on the substrate side. CONSTITUTION:The GeTe material added with nitrogen is used as the essential component of the optical thin recording film 12 and the nitrogen content in the thin recording film 12 is adjusted to the ratio smaller than the average nitrogen content on the substrate 11 side. The oxidation corrosion of the thin recording film 12 progressing from a protective film 13 side is thereby powerfully prevented. Recording and reproducing of information are generally executed by allowing a light beam to enter the medium from the substrate 11 side and, therefore, the recording and reproducing characteristics of the optical information recording medium depend strongly on the properties of the thin recording film 12 on the substrate 11 side. The quantity of the deposited nitrogen which is a noise component on the substrate 11 side decreases and the good recording and reproducing characteristics are maintained if the nitrogen content of the thin recording film 12 on the substrate side is lower than the average nitrogen content.
Inventors:
Teruo Kobayashi
Application Number:
JP11891688A
Publication Date:
April 02, 1997
Filing Date:
May 16, 1988
Export Citation:
Assignee:
Nippon Columbia Co., Ltd.
International Classes:
B41M5/26; G11B7/24035; G11B7/243; G11B7/2433; (IPC1-7): B41M5/26; G11B7/24
Domestic Patent References:
| JP6211685A | ||||
| JP58161161A |
Attorney, Agent or Firm:
Minoru Hayashi