High performance media for optical recording
AssigneeEastman Kodak Company
InventorsGeorge R. Olin, Yuan-Sheng Tyan, Pranab K. Raychaudhuri, Fridrich Vazan
Life of this patent
Estimating the term…
Abstract
A recordable element including a substrate and having over its surface, in order, an optical recording layer and a light reflecting layer, the improvement includes an optical recording layer containing Te.sub.a Ge.sub.b C.sub.c H.sub.d O.sub.e where a, b, c, d, and e are atomic percents such that a+b+c+d+e=100, and wherein 10<a<40, 10<b<60, 5<c<35, 10<d<5, e.gtoreq.0; an the optical recording layer having one or more sublayers which can be of different compositions; and the thickness t of the optical recording layer is 0.7 Tmin<t<1.3 Tmin.
Claims18
A recordable element including a substrate and having over its surface, in order, an optical recording layer and a light reflecting layer, the improvement comprising:
- (a) the optical recording layer containing Te.sub.a Ge.sub.b C.sub.c H.sub.d O.sub.e where a, b, c, d, and e are atomic percents such that a+b+c+d+e=100, and wherein 10<a<40, 10<b<60, 5<c<35, 10<d<35, e.gtoreq.0;
- (b) the optical recording layer having one or more sublayers which can be of different compositions;
- and
- (c) the thickness t of the optical recording layer is 0.7 Tmin<t<1.3 Tmin.
A recordable element comprising a substrate and having over its surface, in order, a recording layer and a light reflecting layer, the improvement comprising:
- (a) the optical recording layer containing Te.sub.a Ge.sub.b C.sub.c H.sub.d O.sub.e where a, b, c, d, and e are atomic percents such that a+b+c+d+e=100, and wherein 10<a<40, 10<b<60, 5<c<35, 10<d<35, e.gtoreq.0 the recording layer having a material composition graded along its thickness;
- and
- (b) the thickness t of the optical recording layer is 0.7 Tmin<t<1.3 Tmin.
A process for making a recordable element including a substrate and having over its surface, in order, an optical recording layer and a light reflecting layer, comprising the steps of:
- a) providing an optical recording layer by sputtering the optical recording layer containing Te.sub.a Ge.sub.b C.sub.c H.sub.d O.sub.e where a, b, c, d, and e are atomic percents such that a+b+c+d+e=100, and wherein 10<a<40, 10<b<60, 5<C<35, 15<(c+d)<65, e.gtoreq.0;
- and
- (b) adjusting the thickness t of the optical recording layer to be in the range of 0.7 Tmin<t<1.3 Tmin.
Dependencies are inferred from the claim text.