Write once optical recording medium

Details Write once optical recording medium Write once optical recording medium

2005-01-11

2005-01-11

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C430S270130

Reexamination Certificate

active

06841218

ABSTRACT:
An object of the present invention is to provide a phase-change optical recording medium of an amorphous recording mark type. The optical recording medium is a write once type medium capable of decreasing the degradation of an information signal which has been already recorded. The recording layer of the optical recording medium according to the present invention includes a first recording layer and a second recording layer. The first recording layer comprises a first composition which can be changed into another composition more stable in an amorphous state by combining with a component included in the second recording layer.

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patent: 6406772 (2002-06-01), Tominaga et al.
patent: 6544617 (2003-04-01), Tyan et al.
patent: 6605330 (2003-08-01), Tyan et al.

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