Information recording medium including a spacing member having p

Dynamic information storage or retrieval – Storage medium structure – Optical track structure

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369272, 3461351, G11B 724

Patent

active

049691430

ABSTRACT:
An information recording medium is disclosed including a first disc having opposite side surfaces and a second disc having opposite side surfaces, coaxially positioned adjacent the first disc. A first spacing member is positioned between the first and second discs for fixedly connecting the first and second discs together to form an air space between the facing surfaces of the first and second discs. A recording layer is formed on a facing surface of one of the first and second discs in the air space between the discs. The recording layer includes a pre-formatted data recording area having recorded pre-formatted data thereon. A second spacing member is aligned with the surface of the pre-formatted data recording area for bonding the pre-formatted data recording area of the recording layer to the facing surface of the other of the first and second discs.

REFERENCES:
patent: 4074282 (1978-02-01), Balas, Jr. et al.
patent: 4432002 (1984-02-01), Ando
patent: 4443806 (1984-04-01), Ando
patent: 4443870 (1984-04-01), Hazel et al.
patent: 4564850 (1986-01-01), Kazuhara
patent: 4683562 (1987-07-01), Matsui et al.

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