Optical disk

Details Optical disk Optical disk

2005-08-31

2010-11-09

Mulvaney, Elizabeth (Department: 1785)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270110

Reexamination Certificate

active

07829166

ABSTRACT:
It is an object of the present invention to provide a process for manufacturing a high-density optical disk having excellent optical properties by suppressing the production of a cloud caused by a release failure and preventing the deterioration of hue and light transmittance.The present invention is a process for manufacturing a high-density optical disk, comprising the steps of:(1) preparing a resin composition comprising an aromatic polycarbonate resin and a predetermined amount of monoglyceride behenate;(2) injecting molding the resin composition to obtain a substrate; and(3) forming an information recording/reproduction layer on the substrate, whereinthe aromatic polycarbonate resin has a sodium metal content of 0.0005 to 0.05 ppm and a viscosity average molecular weight of 10,000 to 20,000, andthe monoglyceride behenate has a sodium metal content of 1 ppm or less.

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