Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1997-06-11
2000-09-05
Dinh, Tan
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
428 644, 43027013, G11B 724
Patent
active
061153524
ABSTRACT:
An optical information recording medium comprising a substrate provided with periodically wobbling guide grooves with a track pitch of 1.6.+-.0.1 .mu.m, and a lower protective layer, a phase-change type recording layer, an upper protective layer and a reflective layer formed in this sequence on the substrate, for recording, retrieving and erasing amorphous marks in the guide grooves by modulation of light intensity of at least two levels by means of a focused light having a wavelength of 780.+-.30 nm applied from the side of the substrate opposite to the recording layer side so that a crystalline state with a reflectance of from 15 to 25% is an unrecorded state, and an amorphous state with a reflectance of less than 10% is a recorded state, wherein the grooves have a depth of from 25 to 45 nm and a width of from 0.4 to 0.6 .mu.m.
REFERENCES:
patent: 5249175 (1993-09-01), Akahira et al.
patent: 5298305 (1994-03-01), Shinozuka et al.
patent: 5410534 (1995-04-01), Nagata et al.
patent: 5581539 (1996-12-01), Horie et al.
patent: 5736657 (1998-04-01), Ide et al.
patent: 5745475 (1998-04-01), Ohno et al.
Horie Michikazu
Kubo Masae
Mizuno Masaaki
Ohno Takashi
Tsuboya Kanako
Dinh Tan
Mitsubishi Chemical Corporation
LandOfFree
Optical information recording medium capable of rewriting data a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical information recording medium capable of rewriting data a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical information recording medium capable of rewriting data a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2219854