Method of forming optical discs

Details Method of forming optical discs Method of forming optical discs

1990-07-20

1993-04-06

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264 14, 264 22, 264107, 427164, B29D 1100

Patent

active

052001202

ABSTRACT:
The optical disc of the present invention has a transparent substrate provided on the surface opposite to the surface of a metallic reflective film in contact with a recording layer, and reading of predetermined information is performed by permitting a laser beam to be incident from the transparent substrate side. That is, light is reflected on the surface on the opposite side to the surface of the metallic reflective film in contact with the recording layer, and by employment of such a mechanism, it becomes possible to enhance the reflectance in the metallic reflective film, and also the difference in surface reflectance between the concavity and the convexity is effectively corrected at the uneven pit portion with memorized information.

REFERENCES:
patent: 4374077 (1983-02-01), Kerfeld
patent: 4790893 (1988-12-01), Watkins
patent: 4956214 (1990-09-01), Imataki et al.

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