Importance

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Abstract

Method of making an optical information record. A substrate having a surface for carrying an information bearing layer is provided. A curable polymer is provided on said surface of the substrate. A flexible stamper is provided having an information bearing pattern on a first surface thereof, said first surface having inner and outer regions. The stamper is distorted such that the inner region of the first surface bearing the information pattern bulges outward relative to the outer region, providing the first surface with a generally convex contour in at least one direction. The distorted stamper is positioned relative to the substrate such that the convex surface of the stamper having the information bearing pattern is capable of being pressed against the surface of the substrate bearing the curable polymer on the substrate. The distorted first surface of the stamper and the polymer bearing surface of the substrate are pressed together, causing the inner region of the stamper to first contact the substrate surface and the remainder of the distorted stamper to progressively contact the remainder of the stamper surface as the respective surfaces are further pressed together, thereby distributing the polymer across the substrate surface and forming a replica of the information bearing pattern in the polymer surface. The polymer is cured, thereby fixing the replica on the cured polymer surface, to provide a formed, information bearing layer on the substrate. The substrate is separated from the stamper.

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First Claim