Optical recording medium

Details Optical recording medium Optical recording medium

2005-01-18

2005-01-18

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064800, C430S270140

Reexamination Certificate

active

06844044

ABSTRACT:
A phase modulation type optical recording medium has at least one layer of recording film4and at least one layer of metal film3on a substrate1having recessed portions formed therein, wherein one or more layers constituting the recording film include organic material that decomposes upon absorption of laser light to change its refractive index, and width of the recessed portions2is set to 0.10 μm˜0.21 μm, thereby providing an optical recording medium of write once type with high recording density capable of high reproduction output.

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