Optical disc having indication portion

Details Optical disc having indication portion Optical disc having indication portion

1995-12-19

1997-10-07

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369280, G11B 724, G11B 370

Patent

active

056755708

ABSTRACT:
An optical disc is provided with: a disc substrate of light transmissive type having an information record surface including an information recorded region, where pits or grooves carrying an information signal are coaxially or spirally formed, and an information not-recorded region, where the pits or grooves carrying the information signal are not formed; a light reflective layer wholly disposed on the information record surface in the information recorded region, and partially disposed on the information record surface in the information not-recorded region such that an indication pattern is formed of the partially disposed light reflective layer on the information record surface in the information not-recorded region; and a protection layer disposed on the light reflective layer and a portion of the information record surface in the information not-recorded region where the light reflective layer is not disposed.

REFERENCES:
patent: 964685 (1910-07-01), Owen
patent: 1033909 (1912-07-01), Owen
patent: 4066268 (1978-01-01), Borchard et al.
patent: 4967286 (1990-10-01), Nomura et al.
patent: 5363255 (1994-11-01), Ivers et al.
patent: 5398231 (1995-03-01), Shin et al.
patent: 5410142 (1995-04-01), Tsuboi et al.
patent: 5608718 (1997-03-01), Schiewe

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