Optical disc having plural grooves of different depths

Details Optical disc having plural grooves of different depths Optical disc having plural grooves of different depths

2005-01-11

2005-01-11

Dinh, Tan (Department: 2653)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275100, C428S064400, C430S270130

Reexamination Certificate

active

06842420

ABSTRACT:
The width and/or depth of guide grooves on the disc substrate surface are changed in each data recording layer and the guide groove depth of the recording film layer is appropriately shaped in each data recording layer to provide a high density, high recording capacity optical disc. The optical disc has plural substrate layers each having plural guide grooves; plural data recording layers laminated on the substrate layers, each of the plural data recording layers having a recording film for recording data over the guide grooves; and an intermediate layer between the plural data recording layers. The guide groove width is different on each substrate layer. The guide grooves of the data recording layers formed according to the guide grooves of the substrate layer have the same pitch in each data recording layer.

REFERENCES:
patent: 5381401 (1995-01-01), Best et al.
patent: 5581539 (1996-12-01), Horie et al.
patent: 5608716 (1997-03-01), Koyama et al.
patent: 5745475 (1998-04-01), Ohno et al.
patent: 5881032 (1999-03-01), Ito et al.
patent: 6246656 (2001-06-01), Kawakubo et al.
patent: 6379767 (2002-04-01), Park et al.
patent: 6456584 (2002-09-01), Nagata et al.
patent: 6603733 (2003-08-01), Tsukagoshi et al.
patent: 6611491 (2003-08-01), Nishiuchi et al.
patent: 6663935 (2003-12-01), Kashiwagi et al.
patent: 6781949 (2004-08-01), Morimoto
patent: 5-182203 (1993-07-01), None

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