| 摘要 |
PURPOSE:To straighten the warpage of an optical disk and to perform recording and reproduction in a state where the warpage is straightened by providing a sheet shape elastic body on a rigid base material, and straightening the warpage of the optical disk by adhering the surface of the sheet shape elastic body closely with the surface of the optical disk. CONSTITUTION:The sheet shape elastic body 3 is provided at the rigid base material 2 via a double-sided bonding tape 4, and the warpage of the optical disk can be straighten by adhering the surface of the sheet shape elastic body 3 closely with that of the optical disk. In other words, since the sheet shape elastic body 3 is deformed elastically by applying pressure to the surface of the sheet shape elastic body 3 and that of the optical disk by bringing them into contact with each other, the air between the surface of the sheet shape elastic body 3 and that of the optical disk can be eliminated, which adheres them closely, and the warpage of the optical disk can be straightened almost to the same degree of the rigid base material 2. Therefore, the warpage in projecting and recessed shape of the optical disk can be straightened. Also, since no material exists on the surface of the optical disk at a side opposite to the sheet shape elastic body 3, the irradiation of recording light and reproducing light can be performed. Thereby, the warpage of the optical disk can be straightened, and the recording and reproduction can be performed in a state where the warpage is corrected. |
