Optical information medium, and method and apparatus for...

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C428S064200, C428S156000, C369S275400, C156S074000, C156S275700, C156S285000, C156S295000, C156S379800, C156S539000

Reissue Patent

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RE039412

ABSTRACT:
The disk-shaped optical information medium of this invention includes: a first substrate having a center hole; a second substrate having a center hole; and a radiation curable resin interposed between the first and second substrates for bonding together the first and second substrates, wherein the optical information medium further includes a stopper for preventing the radiation curable resin from protruding into the center holes of the substrates, and a space between the first and second substrates of at least half of a clamp region for clamping the optical information medium is filled with the resin.

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