Recorders – Record receivers and/or driving means therefor – Laminated – impregnated – or coated bases
Patent
1982-09-29
1984-10-30
Hartary, Joseph W.
Recorders
Record receivers and/or driving means therefor
Laminated, impregnated, or coated bases
346137, 369111, 369277, 369284, G01D 1532
Patent
active
044803028
ABSTRACT:
Laminated optical recording medium that provides desired optical properties in combination with pregrooved channels that define data tracks on which data may be written. Annular or spiral grooves are selectively placed on a base disc substrate. A recording layer is deposited on a transparent disc substrate. The two disc substrates are then bonded together so that the recording layer on the transparent disc substrate confronts the grooves on the base disc substrate. The covered grooves thus form chambers exposed to the recording layer. Prior to bonding the two disc substrates together, the chambers may be filled with an inert gas. A rigid support disc, such as is made from aluminum, may optionally be bonded to the underside of the grooved base disc substrate.
REFERENCES:
patent: 4074282 (1978-02-01), Balas
patent: 4264911 (1981-04-01), Wilkinson
patent: 4308545 (1981-12-01), Lehureau
Johnston Doyle W.
Kalk Franklin D.
Muchnik Boris J.
Spong Fred W.
Gold Bryant R.
Hartary Joseph W.
Storage Technology Corporation
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