Information recording medium
AssigneeVictor Company of Japan, Ltd.
InventorTetsuya Kondo
Life of this patent
Estimating the term…
Abstract
In an information recording medium comprising at least a substrate, a recording layer, and a resin layer, the substrate is formed with at least a pit corresponding to a read only area 31 and a groove corresponding to a recording/reproducing area 32 without overlapping with each other. A reflectivity of the recording layer is specified to be more than 10%. The recording layer and the resin layer are continuously adhered over both the read only and recording/reproducing areas 31 and 32. The information recording medium is characterized in that both push-pull signal outputs T1 and T2, which are reproduced from the read only area 31 and the recording/reproducing area 32 respectively, are more than 0.1 and satisfy an inequality 1.5≧T1/T2≧0.5.
Claims5
An information recording medium comprising a substrate, a recording layer, and a resin layer, wherein said substrate is formed with a pit corresponding to a read only area and a groove corresponding to a recording/reproducing area without overlapping with each other, and wherein a reflectivity of said recording layer is more than 10% and further wherein a push-pull signal output T1 reproduced from said read only area and another push-pull signal output T2 reproduced from said recording/reproducing area is more than 0.1 respectively and further 1.5≧T1/T2≧0.5.
Dependencies are inferred from the claim text.