Method for forming light-transmitting cover layer for optical recording medium
AssigneeCinram International Inc.
InventorsWilliam R. Mueller, Ed Pickutoski
Life of this patent
Estimating the term…
Abstract
A method for manufacturing an optical recording medium includes forming a light-transmitting cover layer over an information layer by depositing a predetermined volume of a liquid resin on the information layer. The method may further include forming a disc rib over an outer periphery of the information bearing side of the substrate, to stop flow of the deposited resin beyond the outer disc periphery. An optical recording medium formed through such a method includes a disc rib delimiting an outer diameter of the light-transmitting cover layer.
Claims15
An optical recording medium comprising:
- a substrate including an information bearing side;
- an information layer including a reflective layer formed on said information bearing side of said substrate;
- and
- a light-transmitting cover layer over said reflective layer
- a disc rib over an outer periphery of said information bearing side of said substrate and delimiting an outer diameter of said light-transmitting cover layer.
A method for manufacturing an optical recording medium, the method comprising:
- (a) molding a substrate including an information bearing side;
- (b) forming an information layer by applying a reflective layer over the information-bearing side of the substrate;
- (c) forming a light-transmitting cover layer over said information layer by depositing a predetermined volume of a liquid resin on said information layer, wherein the predetermined volume is determined based on the formula:
- (desired cover layer thickness)·π·[(cover layer outer radius)2−(cover layer inner radius)2];
- and
- forming a disc rib over an outer periphery of the information bearing side of the substrate, to stop flow of the deposited resin beyond the outer disc periphery.
A method for manufacturing an optical recording medium, the method comprising:
- (a) molding a substrate including an information bearing side;
- (b) forming an information layer by applying a reflective layer over the information-bearing side of the substrate;
- (c) forming a light-transmitting cover layer over said information layer by depositing a predetermined volume of a liquid resin on said information layer, wherein the predetermined volume is determined based on the formula:
- (desired cover layer thickness)·π·[(cover layer outer radius)2−(cover layer inner radius)2],
- wherein said substrate formed in step (a) includes a disc rib at an outer disc periphery,
- wherein the disc rib is configured to stop flow beyond the outer disc periphery of the liquid resin deposited in step (c).
A method for manufacturing an optical recording medium, the method comprising:
- (a) molding a substrate including an information bearing side;
- (b) forming an information layer by applying a reflective layer over the information-bearing side of the substrate;
- (c) forming a light-transmitting cover layer over said information layer by depositing a predetermined volume of a liquid resin on said information layer, wherein the predetermined volume is determined based on the formula:
- (desired cover layer thickness)·π·[(cover layer outer radius)2−(cover layer inner radius)2];
- and
- forming a disc rib along with the substrate, said disc rib being formed over an outer periphery of the information bearing side of the substrate, to stop flow of the deposited resin beyond the outer disc periphery.
Dependencies are inferred from the claim text.