Information storage device and method of forming same

Details Information storage device and method of forming same Information storage device and method of forming same

1980-10-06

1982-05-25

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Disc

3461351, 369284, G01D 1534

Patent

active

043319661

ABSTRACT:
An information storage device for recording by means of a radiant energy beam such as a laser in which a disc-shaped base member, one or more regions of recording medium and one or more disc-shaped protective layers (or "windows") are arranged to form a layered structure or sandwich. The innermost portions of the protective layer(s) are fastened to the corresponding portions of the base member and an annular support ring radially spaced from the outermost edge of the base member is fastened to the outer edge of the protective layer(s). A circumferential gap is thereby provided between the annular support and base member to permit expansion and contraction of the base member.

REFERENCES:
patent: 4038663 (1977-07-01), Day
patent: 4074282 (1978-02-01), Balas
patent: 4264911 (1981-04-01), Wilkinson
Bartolini et al.; Optical Disk Systems Emerge; IEEE Spectrum, Aug. 1978, pp. 20-28.

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