| 摘要 |
<p>A variable sensitivity optical recording medium comprising a substrate (12) having a series of indentations (32) in a major surface (14) and having a covering, including at least an absorptive layer (36), overlying the substrate with the covering filling the indentations thereby forming first and second regions of different respective thicknesses in the optical recording medium where the recording sensitivity of the first regions is greater than the recording sensitivity of the second regions. Various other layers may be included between the substrate (12) and an overcoating (46) to enhance the recording medium. The invention also includes an information record having an information recorded therein as a series of the first regions having different optical properties from the remainder of the first regions and from the optical properties of the second regions. <IMAGE></p> |
