| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk wherein warpage of a disk substrate having a cover sheet can be prevented, to provide a method for sticking a display sheet to the optical disk and to attain stabilization of reading and writing characteristics and prevention of reduction of fine appearances of the optical disk. <P>SOLUTION: In the optical disk 100, the disk substrate 27 having a recording layer 23 formed on one surface of a substrate 21 and the cover sheet 25 bonded onto the recording layer 23 and the display sheet 29 stuck to a surface 27b of the disk substrate 27 opposite to the a surface 27a onto which the cover sheet 25 is bonded and having physical characteristics nearly identical with that of the cover sheet 25 are provided. Thermal shrinkage directions and thermal shrinkage rates of the display sheet 29 and the cover sheet 25 are made to nearly coincide with each other. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
