Method of producing substrate for optical disc

Details Method of producing substrate for optical disc Method of producing substrate for optical disc

1996-12-24

1999-05-25

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

264106, 425810, B29D 1100, B29D 1700

Patent

active

059067756

ABSTRACT:
A prescribed molded substrate is molded out of a melted resin with a stamper having projections for forming pits with the shape of the projections preliminarily set to be greater than the shape of pits of the substrate to be molded. The relationship between the height H of the projections for forming the pits to the stamper and the depth d of the molded substrate is such that H/d=1.3 to 1.8.

REFERENCES:
patent: 5274623 (1993-12-01), Usami et al.
patent: 5458818 (1995-10-01), Kim et al.
patent: 5603870 (1997-02-01), Roll et al.

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