| abstract |
The C / N ratio of the reproduction signal, in particular the reproduction signal of the optical record carrier, is lowered due to the irregularities or deformation of the optical recording layer due to the uneven shape of the underlying guide means formed on the substrate surface. This degradation can be prevented by depositing a planarization layer under the recording layer, which does not deteriorate the efficiency of servo tracking. This reduction in servo tracking effect is prevented by inserting a dielectric layer between the planarization layer and the guide. |