| http://www.w3.org/ns/prov#value | - Furthermore, a second producing method of the present invention is a method for producing an optical disk including a first substrate and a second substrate in which a signal area is to be formed on one principal plane, including the processes of: (i) fixing the other principal plane of the second substrate, which is an opposite side of the one principal plane, to a support; (ii) forming at least
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