| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate any warp or distortion in an information recording medium that would occur in production thereof the thereby eliminate a risk of constituting a hindrance to recording or reading (reproduction) of information that is caused when an obtained information recording medium does not become flat due to a warp occurring in a recording substrate when injection molded and the thickness of an adhesive layer of the information recording medium becomes uninformed. SOLUTION: In press adhering first and second recording substrates 1a, 1b that are concentrically overlapped each other, it is possible to sequentially get rid of any warp or distortion caused in a substrate when it is produced from a central portion to an outer circumferential portion thereof by including a process in which a press adhesion of a recording substrate is performed by sequentially pressing the recording substrate from the central portion of the circumferential portion thereof with a substantially uniform pressure in a circumferential direction of the substrate, whereby a warp or a distortion after completion of adhesion is moderated, thereby making it possible to produce an information recording medium that is substratially flay and which has a uniform thickness of an adhesive layer 20.</p> |
