Optical disc with a discontinuous surface structure
AssigneeRitek Corporation
InventorsShih-Mim Chang, Shing-Tang Liao, Chien-Chang Lu
Life of this patent
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Abstract
Disclosed herein is an optical disc having an information area situated between an internal edge and an external edge of the optical disc. The optical disc includes a first substrate, a second substrate, a recording layer, a reflecting layer and a number of surface structures. The second substrate is disposed over the second substrate, the recording layer and the reflecting layer are disposed between the two substrates, and the reflecting layer is disposed between the first substrate and the recording layer. The surface structures are discontinuously disposed on the surface of the second substrate.
Claims18
An optical disc having an internal edge, an external edge and an information area situated therebetween, the optical disc comprising
- a first substrate;
- a second substrate disposed above the first substrate;
- a recording layer disposed between the first substrate and the second substrate;
- a reflecting layer disposed between the first substrate and the recording layer;
- and
- a surface structure discontinuously disposed on a surface of the second substrate, the surface structures comprising:
- at least one first stripe-protrusion formed on the surface, the first stripe-protrusion having a first stripe-body and a first tip portion extending from the first stripe-body in a direction parallel to the surface, the first tip portion having a width less than a width of the first stripe-body;
- and
- at least one second stripe-protrusion formed on the surface, the second stripe-protrusion having a second stripe-body, a first pincer portion and a second pincer portion, both the first and second pincer portions extending from the second stripe-body in a direction parallel to the surface so that an indentation being formed between the first and second pincer portions, wherein the first tip portion extends into the indentation between the first and second pincer portions and is not in contact with the first and second pincer portions such that a curved groove is formed between the first tip portion and the first and second pincer portions.
Dependencies are inferred from the claim text.