OPTICAL INFORMATION RECORDING MEDIUM

Title:

OPTICAL INFORMATION RECORDING MEDIUM

Document Type and Number:

Japanese Patent JPH08102083

Kind Code:

A

Abstract:

PURPOSE: To obtain a rewritable recording medium which enables the reproduction of recorded data with a CD drive.

CONSTITUTION: A substrate of the medium is provided with a guide groove having a 1.5 to 1.7μm pitch, 0.6 to 0.95μm width and 15 to 30nm depth and this medium is formed by successively laminating at least an intermediate layer, a dielectric protective layer, a phase transition type optical recording layer, another dielectric protective layer and a reflection layer in that order on this substrate. The phase transition type optical recording layer has a composition within the tetragonal region formed with the following four compositional points (on percent scales) of A, B, C and D in the Ge-Sb-Te ternary composition diagram: A is Ge47Sb6Te47; B is Ge43Sb14Te43; C is Ge34Sb17Te49; and D is Ge31Sb24 Te45.

Inventors:

ONO TAKASHI
HORIE MICHIKAZU
TAKADA KENICHI

Application Number:

JP23788294A

Publication Date:

April 16, 1996

Filing Date:

September 30, 1994

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP

International Classes:

G11B7/24; G11B7/2407; G11B7/24079; G11B7/24085; G11B7/241; G11B7/243; G11B7/2433; G11B7/2437; (IPC1-7): G11B7/24; G11B7/24

Attorney, Agent or Firm:

Hasegawa Moji

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