Patent ID: 6190838
Filing Date: 2001-02-20
Classification: B29D,G11B

Abstract:
A method of making a second stamper from a first stamper and a prerecorded master disk for use in a data storage disk molding process, wherein the method is nondestructive to both the prerecorded master disk and the first stamper, comprising the steps of:providing a prerecorded master disk having a photoresist information layer on a master substrate;making a first stamper comprising the steps of: depositing a nickel layer onto the photoresist information layer, positioning a photopolymer laver between the nickel layer and a structural layer, separating the photopolymer layer from the nickel layer forming a photopolymer information layer and covering the photopolymer information layer with a first metal layer; andmaking a second stamper from the first stamper comprising the steps of covering the first metal layer with a second metal layer to form a stamper assembly, wherein the first metal layer and the second metal layer are bonded together, and removing the first metal layer and the second metal layer from the stamper assembly to form the second stamper, wherein removal of the first metal layer and the second metal layer is nondestructive to the photopolymer information layer.