OPTICAL RECORDING MEDIUM, FILM THICKNESS MEASUREMENT METHOD OF THE SAME, FILM THICKNESS CONTROL METHOD, MANUFACTURING METHOD, FILM THICKNESS MEASURING DEVICE AND FILM THICKNESS CONTROLLER

摘要

PROBLEM TO BE SOLVED: To measure the film thickness of a recording layer easily by a transmission method in an optical recording medium which has a reflective layer, etc., between a substrate and the recording layer.;SOLUTION: This optical recording medium is provided with a reflective layer 3 between a light transmitting substrate 1 and a dyestuff containing recording layer 5 on which information is recorded optically. The area of the dyestuff containing recording layer 5 is formed wider than the area of the reflective layer 3 by prescribed areas 30a, 30b.;COPYRIGHT: (C)2004,JPO&NCIPI