| 摘要 |
PURPOSE:To simply and surely obtain an optical disk which obtains correctly a pressure adjusting hole on an inner peripheral stuck part without minutely working on a spacer and does not deform, even when atmospheric pressure is varied, by providing a projecting part and a recessed part on a substrate. CONSTITUTION:On a substrate peripheral stuck surface of an air sandwiched optical disk, >=1 projecting part 11 or recessed part are provided and an adhesive material layer is cut at this place. Also on at least one member of a stamper side inner peripheral mold of an injection molding machine for a plastic substrate, a projecting part or a recessed part is provided. |
