Informationsaufzeichnungsmedium sowie Verfahren und Vorrichtung zu seiner Herstellung

摘要

In an optical disk obtained by pasting two substrates, air bubbles and the like are removed from an adhesive layer between the substrates pasted together, and the thickness irregularity of the adhesive layer is suppressed to an allowable value or less. A spacer (60) having a predetermined thickness is concentrically placed on a substrate (30). An adhesive (220) is applied onto a surface of the substrate (30) on which the spacer (60) is placed. Another substrate (40) is placed on the surface of the substrate (30) on which the adhesive (220) is applied. The substrates (30, 40) are rotated about the spacer (60) at a high speed. The excessive adhesive (220) sandwiched between the substrates (30, 40) is expelled, together with air bubbles and the like, by using the centrifugal force produced by the rotation. With this process, an adhesive layer (50) having a thickness determined by the thickness of the spacer (60) is left between the two substrates.