METHOD OF PRODUCING MULTILAYER OPTICAL RECORDING MEDIUM

Abstract

Provided is a method of producing a multilayer optical recording medium, which is capable of producing the recording medium with high accuracy of distances between layers without necessity of disposing stampers, and which includes the steps of (a) forming a resin layer with respect to a support substrate; (b) disposing a stamper on the resin layer and irradiating a light beam thereto through the support substrate or the stamper to transfer an unevenness pattern of the stamper to the resin layer; (c) forming a recording layer on the resin layer; (d) repeating the steps (a) to (c) n times to stack n layers of resin layer with recording layer on the support substrate; (e) bonding a base substrate to the n-th recording layer through an adhesive layer; and (f) peeling off the support substrate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a cross-sectional view for illustrating steps (1) to (6) of a method of producing a four-layered recording medium according to a first embodiment of the present invention.

FIG. 1B is a cross-sectional view for illustrating steps (7) to (11) of the method of producing the four-layered recording medium according to the first embodiment of the present invention.

FIG. 1C is a cross-sectional view for illustrating steps (12) to (15) of the method of producing the four-layered recording medium according to the first embodiment of the present invention.

FIG. 1D is a cross-sectional view for illustrating steps (16) to (19) of the method of producing the four-layered recording medium according to the first embodiment of the present invention.

FIG. 2 is a cross-sectional view for illustrating the structure of a four-layered recording medium according to the present invention.

FIG. 3A is a cross-sectional view for illustrating steps (1) to (6) of a method of producing a four-layered recording medium according to a second embodiment of the present invention.

FIG. 3B is a cross-sectional view for illustrating steps (7) to (11) of the method of producing the four-layered recording medium according to the second embodiment of the present invention.

FIG. 3C is a cross-sectional view for illustrating steps (12) to (15) of the method of producing the four-layered recording medium according to the second embodiment of the present invention.

FIG. 3D is a cross-sectional view for illustrating steps (16) to (19) of the method of producing the four-layered recording medium according to the second embodiment of the present invention.

FIG. 4A is a cross-sectional view for illustrating steps (1) to (5) of a conventional method of producing a four-layered recording medium.

FIG. 4B is a cross-sectional view for illustrating steps (6) to (10) of the conventional method of producing the conventional four-layered recording medium.

FIG. 4C is a cross-sectional view for illustrating steps (11) to (14) of the conventional method of producing the conventional four-layered recording medium.

FIG. 4D is a cross-sectional view for illustrating steps (15) and (16) of the conventional method of producing the conventional four-layered recording medium.

Claims

1. A method of producing a multilayer optical recording medium which comprises n (an integer of 2 or more) recording layers on a base substrate, the method comprising the steps of: (a) forming a resin layer with respect to a support substrate;(b) disposing a stamper on the resin layer and irradiating a light beam thereto through the support substrate or the stamper to transfer an unevenness pattern of the stamper to the resin layer;(c) forming a recording layer on the resin layer;(d) repeating the steps (a) to (c) n times to stack n layers of resin layer with recording layer on the support substrate;(e) bonding a base substrate to the n-th recording layer through an adhesive layer; and(f) peeling off the support substrate.

2. The method according to claim 1, wherein at least one of the support substrate and the stamper transmits light beam.

3. The method according to claim 2, wherein the support substrate comprises glass or transparent ceramics as a main material, and the stamper comprises metal as a main material.

4. The method according to claim 2, wherein the support substrate comprises metal as a main material, and the stamper comprises glass or transparent ceramics as a main material.

5. The method according to claim 2, wherein the support substrate and the stamper each comprise glass or ceramics as a main material.