Ceramic overcoated optical recording element
AssigneeEastman Kodak Company
InventorsMool C. Gupta, Joseph J. Wrobel, Dennis G. Howe
Life of this patent
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Abstract
A recording element comprising a support having thereon a heat-deformable optical recording layer having a transparent ceramic overcoat characterized in that the overcoat has a thickness up to about 0.05 .mu.m is disclosed.
Claims10
A recording element comprising a support having thereon a heat-deformable optical recording layer having a transparent ceramic overcoat characterized in that the optical recording layer
- (a) is an amorphous layer of a dye and a binder;
- (b) has an absorption factor of at least 20 at a first wavelength and is substantially transparent at a second wavelength;
- (c) is capable of being thermally deformed by a beam of high energy density radiation of the first wavelength to form a deformation comprising a hole or depression surrounded by a sharply defined ridge;
- and
- (d) the overcoat has a thickness up to 0.05 .mu.m.
An information bearing record element comprising a support having thereon a record bearing heat-deformed optical recording layer having a transparent ceramic overcoat characterized in that the record bearing optical recording layer
- (a) is an amorphous layer of a dye and a binder;
- (b) has an absorption factor of at least about 20 at a first wavelength and is substantially transparent at a second wavelength;
- (c) has a plurality of deformations comprising a hole or depression surrounded by a sharply defined ridge;
- (d) has a ceramic overcoat having a thickness of up to about 0.05 .mu.m;
- and
- (e) comprises a dome-like structure over each of the holes or depressions in the record bearing optical recording layer.
Dependencies are inferred from the claim text.