| 摘要 |
PURPOSE:To prevent deformation of an optical disk by adhering the disk substrate to a supporting body equipped with air holes according to the specified method. CONSTITUTION:The disk substrates 1 are adhered to the supporting body 2 with air holes 4 in a manner that the recording films face to each other through air gaps 3. By this constitution, even when temp. of the side A of the optical disk becomes different from that of the side B and pressure difference in the air gaps is caused due to temp. difference, the pressure in the gaps can be made uniform through the holes 3. Thus, deformation of the disk can be prevented. |
