| 摘要 |
<P>PROBLEM TO BE SOLVED: To heighten adhesiveness and to increase mechanical strength of substrates in an information recording medium formed by sticking two disk-like substrates. <P>SOLUTION: In the information recording medium having a structure wherein an information recording substrate provided with an information recording layer and a dummy substrate are stuck to each other by using an adhesive layer, a plurality of reinforcing grooves G each having a prescribed groove width W are formed on a surface of a adhesive layer side of the dummy substrate while a flat part F is provided between the two adjacent reinforcing grooves G so as to have a groove interval P and rigidity of the dummy substrate is increased by curing an adhesive with which the reinforcing grooves G are filled up. <P>COPYRIGHT: (C)2007,JPO&INPIT |
