Recorders – Record receivers and/or driving means therefor – Laminated – impregnated – or coated bases
Patent
1985-03-14
1987-01-06
Goldberg, E. A.
Recorders
Record receivers and/or driving means therefor
Laminated, impregnated, or coated bases
365122, 427 431, 427 531, 427402, 427404, 428692, 428694, 428900, 428913, 430495, 430945, 346 11, G01D 1534, B05D 306, B32B 1504, G03C 100
Patent
active
046350764
ABSTRACT:
The novel optical recording medium, as in the prior art, has a transparent substrate bearing two recording layers, each addressable from only one side of the medium, but unlike prior 2-sided media, the two recording layers are on the same face of the substrate. When the novel medium is addressed from one side of the substrate, a thin-film barrier, such as an opaque metal, between the two recording layers prevents the more distant recording layer from responding to that energy. Preferably a tough, transparent cover layer is sealed to the substrate to protect the two recording layers.
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Rinehart Thomas A.
Willson Richard F.
Barte William B.
Goldberg E. A.
Minnesota Mining and Manufacturing Company
Preston Gerald E.
Sell Donald M.
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