| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical recording medium in which the latitude for designing an optical disk is increased, the signal characteristics in the recording layer in the recesses and projections of lands and grooves can be kept in a preferable state and high reliability can be obtained. SOLUTION: A layered film of a first dielectric layer, recording layer, recording assistant layer, second dielectric layer and first reflecting layer successively deposited is formed on a disk substrate having groove tracks with recesses and projections formed on at least one principal surface. Then a UV-curing resin layer is formed to cover the layered film. The film thickness (a) of the recording assistant layer is controlled to satisfy the relation of d/4<a<3d, and preferably d/2<=a<=2d with respect to the film thickness (d) of the recording layer. The order of depositing the layers in the layered film may be reversed, and in the case of reversed order, a light transmitting sheet is disposed with an adhesive layer interposed to cover the layered film. |
