Optical recording medium
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United States of America Patent
Stats
-
Nov 17, 1992
Grant Date -
N/A
app pub date -
Jul 2, 1990
filing date -
Jun 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical recording medium of the type whereby information is recorded and reproduced by utilizing a change of the reflectance of an irradiated portion, caused by irradiating a recording film formed on a substrate with laser beams is described. The recording film in this optical recording medium has a three-layer structure comprised of a layer containing at least tin and selenium and layers of a passive state-forming metal or an oxide thereof, contiguous to both sides of said layer containing tin and selenium. A film of a phthalocyanine compound having a light transmission of at least 80% at a wavelength of 770 to 850 nm is disposed between the recording film and the substrate.
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