Optical information medium and its use
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United States of America Patent
Stats
-
May 31, 2005
Grant Date -
Aug 15, 2002
app pub date -
Dec 4, 2001
filing date -
Dec 15, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical information medium (20) for erasable recording by means of a laser-light beam (10) is provided. A substrate (1) holds a stack (2) of layers with a phase-change recording layer (5) between a first dielectric layer (4) and a second dielectric layer (6). A light-absorptive layer (7) is present proximate the recording layer (5) and is made of a compound of the formula QRx, in which Q is the element Si, Ge, Ti, Zr, Hf, Nb or Ta, R is the element O or N, and 0
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