Method of manufacturing optical recording medium

A method of manufacturing an optical recording medium having a multilayer structure comprising the steps of:

• (a) simultaneously forming said first and second concave and convex surfaces on both surfaces of a transparent substrate of said optical recording medium using a first stamper and a second stamper;
• (b) forming a first reflective layer on said first concave and convex surface and forming a first semitransparent layer on said second concave and convex surface, respectively;
• (c) simultaneously forming first and second transparent layers of light curable material on said first reflective layer and said first semitransparent layer, respectively, and exposing said first and second transparent layers to a light source;
• (d) simultaneously forming a third and fourth concave and convex surfaces on said first and second transparent layers, respectively, using a third stamper and a fourth stamper;
• (e) forming a second semitransparent layer on said third concave and convex surface and a second reflective layer on said fourth concave convex surface;
• and
• (e) forming third and fourth transparent layers on said second semitransparent layer and said second reflective layer, respectively.

A method of manufacturing an optical recording medium having at least first and second concave and convex surfaces formed thereon comprising the steps of:

• (a) simultaneously forming said first and second concave and convex surfaces on both first and second surfaces of a film having a uniform thickness, by pressing first and second stampers thereon;
• (b) forming first and second reflective layers, respectively, on said first and second concave and convex surfaces formed on said first and second surfaces;
• (c) simultaneously forming first and second transparent layers of light curable material on said first and second reflective layers, respectively, and exposing said first and second transparent layers to a light source;
• and
• (d) forming said film into a disk shape by a punching machine.

A method of manufacturing an optical recording medium having at least first and second concave and convex surfaces formed thereon comprising the steps of:

• (a) simultaneously forming said first and second concave and convex surfaces on both first and second surfaces of a film having a uniform thickness, by pressing first and second stampers thereon;
• (b) forming first and second reflective layers, respectively, on said first and second concave and convex surfaces formed on said first and second surfaces;
• (c) simultaneously forming first and second transparent layers of light curable material on said first and second reflective layers, respectively, and exposing said first and second transparent layers to a
• (d) forming third and fourth concave and convex surfaces on said first and second transparent layers, respectively, by pressing said first and second stampers thereon;
• (e) forming third and fourth reflective layers, respectively, on said third and fourth concave and convex surfaces formed on said third and fourth surfaces;
• (f) forming third and fourth transparent layers on said third and fourth reflective layers, respectively;
• and
• (g) punching said film into a disk shape.

A method of manufacturing an optical recording medium having a multi-layer structure comprising the steps of:

• (a) simultaneously forming first and said second minute concave and convex surfaces on both surfaces of said optical recording medium using a first stamper and a second stamper;
• (b) forming a first and a second reflective layer on said first concave and convex surfaces, respectively;
• (c) simultaneously forming a first and a second transparent layer of light curable material on said first and second reflective layers, respectively, and exposing said first and said second transparent layers to a light source;
• (g) forming a third and a fourth concave and convex surface on said first and said second transparent layers simultaneously by using a third stamper and a fourth stamper;
• (h) forming a first and a second semitransparent layer on said third and said fourth concave and convex surfaces respectively;
• and
• (i) forming athird and a fourth transparent layer on said third and said fourth semitransparent layers, respectively.

A method of manufacturing an optical recording medium having a multi-layer structure comprising the steps of:

• (a) simultaneously forming said first and said second concave and convex surfaces on both surfaces of said optical recording medium by employing a first stamper and a second stamper;
• (b) forming a first reflective layer on said first concave and convex surfaces, and forming a first semitransparent layer on said second concave and convex surface, respectively;
• (c) simultaneously forming a first and a second transparent layer of light curable material on said first reflective layer and said first semitransparent layer, respectively, and exposing said first and said second transparent layers to a light source;
• (d) forming a third and a fourth concave and convex surface on said first and said second transparent layers simultaneously by pressing a third stamper and a fourth stamper thereon;
• (e) forming a second and a third semitransparent layer on said first and second transparent layers, respectively;
• and
• (f) forming a third and a fourth transparent layers on said second and said third semitransparent layer, respectively.