Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1980-10-21
1983-05-10
Konick, Bernard
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
3461351, G11B 726
Patent
active
043833110
ABSTRACT:
An improved overcoated optical recording medium comprises a light absorptive layer and an overcoat overlying the absorptive layer wherein the overcoat has a plurality of indentations in the surface which contacts the absorptive layer thereby forming a first region of the recording medium wherein the overcoat layer does not contact the absorptive layer and a second region wherein the overcoat layer does contact the absorptive layer. The recording sensitivity in the first region is greater since the heat loss to the overcoat layer in these regions is reduced and the mechanical constraints on the formation of deformations in the absorptive layer are relaxed. The invention also includes an improved information record having information recorded in a portion of the first region as a change in the local optical properties.
REFERENCES:
patent: 4069487 (1978-01-01), Kasai et al.
patent: 4097895 (1978-06-01), Spong
patent: 4101907 (1978-07-01), Bell et al.
patent: 4216501 (1980-08-01), Bell
patent: 4245229 (1981-01-01), Stephens
patent: 4285056 (1981-08-01), Bell
Konick Bernard
McElheny Jr. Donald
Morris B. E.
RCA Corporation
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