| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration by moisture absorption of a recording disk. SOLUTION: This recording disk has a substrate 11 consisting of a moisture resistant material, recording layer 12, reflection layer 13 and protective layer 14 laminated on the area exclusive of the parts near the outer peripheral part and inner peripheral part of the substrate 11 on the substrate 11 and a moisture resistant coating layer 15 covering the entire part of the surface formed with the recording layer, etc. At this time, the substrate 11 is preferably composed by using glass or moisture resistant plastic. The moisture resistant coating layer 15 is preferably a glass coating layer. |
