High density read only optical disc

Details High density read only optical disc High density read only optical disc

2007-02-06

2007-02-06

Hess, Bruce H. (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C428S064500, C428S064600, C430S270110

Reexamination Certificate

active

10954362

ABSTRACT:
A high density read only optical disc is provided. The high density read only optical disc includes a substrate having pits formed thereon; a crystalline reading assist layer; a first dielectric layer; and a mask layer composed of a metal oxide. The high density read only optical disc does not require a laser with a short wavelength or a large numerical aperture of an objective lens.

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patent: 2000-285536 (2000-10-01), None
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