Optical recording medium having a plurality of discrete phase change data recording points
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United States of America Patent
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Jan 7, 1997
Grant Date -
N/A
app pub date -
Dec 20, 1995
filing date -
Dec 20, 1995
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Abstract
A phase change optical recording medium which includes 1) a substrate having a planar surface; and 2) a plurality of discrete data recording points deposited upon the substrate. The discrete data recording points are formed from a phase change material which changes from a state of a first relative order to a state of a second relative order and visa versa upon the application of optical beam energy. Preferably the phase change material forming the plurality of discrete data recording points is deposited within individual cavities embossed into the surface of the substrate. More preferably the individual cavities are cylindrical or parabolic (bowl shaped) cavities having their central axis perpendicular to the plane of the surface of the substrate.
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