Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1997-06-13
1999-01-19
Neyzari, Ali
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
3692751, 369 4413, G11B 724
Patent
active
058621237
ABSTRACT:
An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and protective layers sandwiching therebetween the recording layer. The groove has wobble for recording ATIP (absolute time information) or ADIP (address information). The following relationship between the groove width GW, beam diameter R.sub.0 and wobble amplitude a.sub.w :
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Horie Michikazu
Kubo Hideyuki
Kubo Masae
Kunitomo Haruo
Mizuno Hironobu
Mitsubishi Chemical Corporation
Neyzari Ali
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