Method for manufacturing disc-shaped optical recording medium
OwnerTomoki Ushida, Mamoru Usamiinventors
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Abstract
A method for manufacturing a disc-shaped optical recording medium is provided, according to which a disc-shaped substrate with no central hole is accurately and stable positioned, when the substrate is spin-coated. A circular recess is formed in the center of a non-coated surface opposite to the surface to be coated of the disc-shaped substrate in the spin-coating step, and a ring-shaped raised rim to fit with the circular recess is provided on the side of a substrate holding portion supporting the disc-shaped substrate during spin-coating. The ring-shaped raised rim is fitted with the circular recess, so that the disc-shaped substrate is accurately positioned and held during the spin-coating step.
Claims12
A method for manufacturing a disc-shaped optical recording medium, comprising the steps of:
- injection-molding a disc-shaped substrate without a central hole for optical recording medium chucking;
- and
- spin-coating a surface on one side of said disc-shaped substrate with resin, wherein
- forming a positioning guide on a non-coated surface opposite to said surface to be coated of the disc-shaped substrate in said injection-molding step, and
- positioning said disc-shaped substrate by said positioning guide in said spin-coating step.
Dependencies are inferred from the claim text.