Patent ID: 6814897
Filing Date: 2004-11-09
Classification: B29C,B82Y,G11B,Y10S

Abstract:
A method of manufacturing a mold tool for molding the base of an optical disk having at least one signal recording region and at least one non-signal recording region comprising:(a) providing a master substrate comprising a signal recording section having a surface with at least one minute concave section or convex section and a non-signal recording section having a surface with at least one concave section or convex section forming a mark indicating the master substrate; (b) forming a first nickel or nickel-alloy mold on said master substrate; (c) peeling off said master substrate from said first mold; (d) forming a resin layer in said first mold; (e) hardening said resin layer to form a cured resin mold; (f) peeling off said first mold from said cured resin mold: (g) forming a second nickel or nickel-alloy mold on said cured resin mold; (h) peeling off said second mold from said resin mold; (i) marking said non-signal recording region of said second mold indicating said second mold; wherein said second mold has a signal recording section comprising a surface having at least one minute concave section or convex section, and a non-signal recording section comprising a surface having at least one concave section or convex section forming a mark indicating said master substrate and at least one concave section or convex section forming a mark indicating the said second mold.