Substrate for an optical disc

Details Substrate for an optical disc Substrate for an optical disc

1986-06-12

1987-10-20

Goldberg, E. A.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 76L, 430271, 430533, 430945, G01D 900, G01D 1510, G03C 1495, G03C 176

Patent

active

047017708

ABSTRACT:
There is provided an optical disc of high reliability, with the recording film protected from deterioration. The optical disc of this invention is produced by forming a tellurium suboxide film or optomagnetic recording film on a substrate made by injection molding from a polycarbonate resin. The substrate is made from a polycarbonate resin containing a phosphite ester-based antioxidant in a specific low amount.

REFERENCES:
patent: 4407995 (1983-10-01), Dick
patent: 4477555 (1984-10-01), Oba et al.
patent: 4565772 (1986-01-01), Takeoka et al.
patent: 4583102 (1986-04-01), Tamura et al.
patent: 4614951 (1986-09-01), Osato et al.

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