Optical recording disc

An optical recording disc comprising:

• a cylindrical hub having a center hole for insertion of a spindle of a recording and playback device,
• a first disc unit comprising a first transparent disc substrate having a center hole in which said cylindrical hub is inserted and bonded, a resin layer formed on an inner surface of said transparent disc substrate and a recording layer formed on said resin layer, and
• a disc member being one of a second disc unit comprising a second transparent disc substrate having a center hole in which said cylindrical hub is inserted and bonded, a resin layer formed on an inner surface of said second transparent disc substrate and a recording layer formed on said resin layer or a reinforcement disc comprising a reinforcement disc substrate bonded to said cylindrical hub,
• said first transparent disc substrate including a first chamfer portion for receiving a bonding material for bonding said cylindrical hub and said first transparent disc substrate, said first chamfer portion being formed in a rim portion of an outside surface of said first transparent disc substrate at a boundary between said cylindrical hub and said transparent disc substrate,
• said second transparent disc substrate or reinforcement disc substrate of said disc member including a second chamfer portion for receiving a bonding material to bond said cylindrical hub and said transparent disc substrate or said reinforcement disc substrate, said second chamfer portion being formed in a rim portion of an outside surface of said second transparent disc substrate or said reinforcement disc substrate at a boundary portion between said cylindrical hub and said respective disc member.