Process for manufacturing optical discs

Details Process for manufacturing optical discs Process for manufacturing optical discs

1995-11-15

1997-11-11

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Light polarizing article or holographic article

264 138, 264107, 26432816, 425810, 427162, B29D 1100

Patent

active

056860269

ABSTRACT:
A process of manufacturing the optical discs by injection molding includes compulsive forced cooling of the molded discs, carried out after sputtering to shorten the cooling time in the mold, in consideration of keeping the replication errors in the pits on the molded discs. The process also includes metallizing the surface of the molded discs by sputtering (to make laser beams reflect). UV resin coating for protecting the metallized surface of the discs, and inspecting the pits for replication of information signals quality.

REFERENCES:
patent: 4363844 (1982-12-01), Lewis et al.
patent: 5244606 (1993-09-01), Maus et al.
patent: 5354517 (1994-10-01), Yamasaki et al.

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