Title:
INFORMATION RECORDING PLATE
Document Type and Number:
Japanese Patent JPS5441703
Kind Code:
A
Abstract:
PURPOSE: To prevent drop-out of information owing to deposition of dust, etc. by laminating a light shielding type information recording medium and a protecting film on a transparent substrate of more than 0.2mm in thickness to form an information recording plate and opening holes in the recording medium from the transparent substrate side by the use of a laser beam thereby recording the information.
Inventors:
OSHIDA YOSHISADA
YONEZAWA SEIJI
YONEZAWA SEIJI
Application Number:
JP10781577A
Publication Date:
April 03, 1979
Filing Date:
September 09, 1977
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B41M5/26; G03G5/00; G11B7/24; G11B7/24047; G11B7/254; G11B7/257; G11B7/26; (IPC1-7): G03G5/00; G11B7/24