Optical information recording disk

Details Optical information recording disk Optical information recording disk

1988-06-28

1989-07-11

Stephan, Steven L.

Dynamic information storage or retrieval

Storage medium structure

Layered

3461351, 369286, G11D 1532, G11B 724

Patent

active

048478270

ABSTRACT:
An optical information recording disk is formed by a pair of disk-like substrates with an inner and an outer annular spacer member disposed therebetween. The inner spacer member supports an inner circumferential portion of each of the disk-like substrates, and the outer spacer member supports an outer circumferential portion of each of the disk-like substrates. The spacer members and substrates thus define an interior space. The spacer members and substrates are fixed together by means of a thermosetting adhesive agent. A notched portion is formed in at least one of the space members so as to communicate the interior of the disk with the ambient atmosphere. Thus, during heating of the disk for purposes of joining the substrates and spacers by hardening the adhesive agent, air in the interior space in the disk can escape through the notched portion. After heating, the notched portion is filled with a sealing member such as a solid member or another adhesive agent.

REFERENCES:
patent: 4504842 (1985-03-01), Odawata
patent: 4720826 (1988-01-01), Sugiyama et al.
patent: 4739345 (1988-04-01), Namba et al.

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