Method of fabrication of a protected optical disk and a disk obt

Details Method of fabrication of a protected optical disk and a disk obt Method of fabrication of a protected optical disk and a disk obt

1983-04-26

1986-01-14

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Layered

156 731, 1563084, 3461351, 346137, 369284, G11B 726

Patent

active

045649324

ABSTRACT:
A protected optical disk for recording information is fabricated by a method whereby at least one cover is rigidly fixed by a welding to an optical disk having at least one layer of recording material which can be both written and read optically. At least two joints are thus formed by welding, each joint being constituted by at least two weld zones each located respectively within a concentric ring.

REFERENCES:
patent: 4074282 (1978-02-01), Balas et al.
patent: 4164068 (1979-08-01), Shropshire
patent: 4365258 (1982-12-01), Geyer et al.
patent: 4417331 (1983-11-01), Takaoka et al.
patent: 4430659 (1984-02-01), Maffitt et al.

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