Patent ID: 7781011

Claim:
A method for coating an optical disc, comprising steps of: providing a tool for coating an optical disc, the tool comprising: a coating section having an upper surface and a coating surface for spreading coating material; a restricting section for defining a coating area; and a support section for supporting the coating section and the restricting section, the support section being coupled to the coating section; wherein a first side of the restricting section is coupled to the coating section while the side opposite to the first side is left free so that the coating section and the restricting section collectively form a structure having an open cross-section and defining a material accommodating space; placing coating material on an optical disc substrate; positioning the coating surface of the coating section of the tool for coating an optical disc to be parallel to a to-be-coated surface of the optical disc substrate; generating a relative circular motion between the tool for coating an optical disc and the optical disc substrate to spread the coating material on the optical disc substrate by use of the tool for coating an optical disc; and forming an annular coating layer on the optical disc substrate, wherein the restricting section includes a first blocking portion having a first outside surface, the first blocking portion is coupled to the coating section in a width direction at one side farther away from the center of a to-be-coated optical disc substrate and extends by a desirable length in a downward direction substantially perpendicular to the upper surface of the coating section, and the first outside surface and the coating surface of the coating section are coplanar, wherein the structure formed collectively by the coating section and the restricting section has an L-shaped cross-section.