REVERSE STACKING DISK

摘要

PURPOSE: A reverse stacking disk is provided to form a protection film having uniform thickness and improve a reverse stacking disk. CONSTITUTION: A reverse stacking disk(D) includes a recording layer and a protection film(4) formed by spin coating. The reverse stacking disk further includes a compensator for making the thickness of the protection film uniform. The compensator is a cut groove(10) formed in a concentric circular shape at the flange of the side opposite to the side on which the protection film is formed.