Patent ID: 7817531

Claim:
An information recording medium comprising at least a substrate and a recording layer, wherein said substrate is formed with a read only area and a recording/reproducing area, and wherein said read only area and said recording/reproducing area do not overlap with each other, and wherein a reflectivity of said recording layer is more than 10%, and wherein said recording layer is formed continuously over at least two areas of said read only area and said recording/reproducing area, and wherein a push-pull signal output T1 reproduced from said read only area is more than 0.1 and another push-pull signal output T2 reproduced from said recording/reproducing area is more than 0.1, and wherein 1.5≧T1/T2≧0.5, and wherein said read only area is composed of a group of pits that is modulated by any one modulation method selected out from 8/12 modulation, 8/14 modulation, 8/15 modulation, 8/16 modulation and 8/17 modulation.