Optical disc

Details Optical disc Optical disc

1982-12-08

1985-03-05

Richardson, Robert L.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

358342, 369284, 369286, 428497, 428523, G11B 724

Patent

active

045035318

ABSTRACT:
An optical disc includes a pair of substrates, at least one of which has predetermined information pits formed on one surface. The two substrates are bonded with a hot-melt adhesive having (1) a softening point of not more than 140.degree. C., (2) a dry tensile adhesive strength of not less than 1 kg/cm.sup.2 at 20.degree. C. and (3) a melt viscosity of not more than 1,000 P at 160.degree. C.

REFERENCES:
patent: 4188433 (1980-02-01), Dijkstra et al.

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