Abstract: An ultraviolet-irradiating device of an optical disk which makes effective use of electric power and has a long life, and an ultraviolet-irradiating method to an optical disk are provided. An ultraviolet-irradiating device 14 of an optical disk for irradiating ultraviolet curable resin A applied to a disk substrate D with ultraviolet rays from an ultraviolet-irradiating unit 143 to cure the ultraviolet curable resin A, wherein an ultraviolet light-emitting diode R is used as an ultraviolet light source of the ultraviolet-irradiating unit 143. According to the present invention, since the ultraviolet light-emitting diode R is used as an ultraviolet light source, lights in a visible region and an infrared region are not emitted like a conventional xenon lamp, that is, only ultraviolet rays required for curing the ultraviolet curable resin can be irradiated, so that power consumption required for light emission of the light source can be reduced.

Abstract: A peeling apparatus including a holding table adapted to carry an optical disc composed of upper and lower disc-shaped substrates laminated to each other, a boss disposed centrally of the holding table which allows gas to blow between the disc-shaped substrates, and a suction means peripherally of the holding table to suck pulverized adhesive dust exhausted from the disc-shaped substrates when the two disc-shaped substrates are peeled from one another. The suction means is provided with a suction groove so formed to correspond to the periphery of the two disc-shaped substrates, and the holding table is provided with sucking and holding means for sucking and holding the two disc-shaped substrates.

Abstract: This invention is purported to provide a method and an apparatus for precisely peeling both of disc-shaped substrates by a simple device without requiring a great peeling force.

Abstract: A method of manufacturing an optical disc which is capable of speeding up the curing of an adhesive and capable of reducing an area or space occupied by a curing unit when manufacturing an optical disc, and a method of manufacturing an optical disc which is not susceptible to heat from a curing unit or a UV irradiation unit while an adhesive is cured. The method of manufacturing an optical disc includes a step of supplying lower and upper disc substrates, a step of spreading an adhesive between the lower and upper discs, and a step of irradiating the adhesive spread between the lower and upper discs with UV, wherein the irradiation step is performed on a turntable.

Abstract: A method of and an apparatus for laminating disc-shaped substrates capable of automatically bonding an adhesive agent to disc-shaped substrates effectively and continuously. The method includes providing an adhesive sheet body comprising a plurality of adhesive agents each covered with a release paper, peeling off the release paper from the adhesive sheet body, positioning the adhesive sheet body from which the release paper has been peeled over a lower disc-shaped substrate, pressing the adhesive sheet body to allow the adhesive agent adhered to the lower surface thereof to bond or transfer onto a surface of the lower disc-shaped substrate, peeling off the adhesive sheet body from the adhesive agent bond onto the surface of the lower disc-shaped substrate, placing an upper disc-shaped substrate on the lower disc-shaped substrate, and pressing the upper disc-shaped substrate against the lower disc-shaped substrate, to bond the substrates to one another.

Abstract: There is provided a method of curing an optical disc capable of effectively curing the optical disc without generating a warp phenomenon when optical disc is cured while ultraviolet curing resin material is irradiated with ultraviolet. The method of curing an optical disc comprises overlaying first and second resin substrates onto each other by way of an adhesive made of ultraviolet curing resin material, the method further comprising clamping the optical disc by ultraviolet transmittance plates at both sides thereof, and curing the adhesive while being irradiated with ultraviolet from outside of the ultraviolet transmittance plates.

Abstract: A method of laminating disc-shaped substrates which is capable of automatically bonding an adhesive agent to the disc-shaped substrates very effectively and continuously. The method of laminating disc-shaped substrates includes the steps of preparing an adhesive sheet body comprising a plurality of adhesive agents each covered with a release paper and bonded to the adhesive sheet body, peeling off the release paper from the adhesive agent, positioning each adhesive agent over a lower disc-shaped substrate, pressing the adhesive sheet body to bond the adhesive agent to the lower disc-shaped substrate, peeling off the adhesive sheet body from the lower disc-shaped substrate, placing an upper disc-shaped substrate on the lower disc-shaped substrate, and pressing the upper disc-shaped substrate against the lower disc-shaped substrate to integrally laminate the disc-shaped substrates.

Abstract: A developing storage disc boss adapted to engage a recess in a rotatable holding table for developing a storage disc including two discoid resin substrates with adhesive contained in a space therebetween. The developing storage disc boss includes a barrel portion for the engagement and a suction cylindrical portion that extends upwardly and orthogonally from a top planar wall of the barrel portion. There is a suction passage extending axially along the boss which includes first and second passages. There are a plurality of suction holes around the periphery of the suction cylindrical portion which communicate with the space between the two substrates. The holes extend radially through the suction cylindrical portion and have inner ends that open directly into the first passage. The first passage opens directly into the second passage, and the diameter of the second passage is greater than that of the first passage.

Abstract: A method of manufacturing a storage disc by curing a substrate material thereof even if ultraviolet scarcely passes through the substrate material.

Abstract: In a technique for bonding two disc-shaped resin substrates constituting the storage disc, the disc-shaped resin substrates are centered to correct the nonalignment therebetween. The method includes steps of placing disc-shaped resin substrates, which have central holes and adhesive interposed therebetween, on a centering holding table provided with a boss, spreading the boss inserted into the central holes of the disc-shaped resin substrates outwardly to center the disc-shaped resin substrates, and partially irradiating the adhesive interposed between the disc-shaped resin substrates with UV rays for curing the disc-shaped resin substrates in the vicinity of the centers thereof to temporarily fix the disc-shaped resin substrates. The nonalignment between the disc-shaped resin substrates is corrected, thereby increasing the quality of the storage disc.

Abstract: There is provided a method of curing an optical disc capable of effectively curing the optical disc without generating a warp phenomenon when optical disc is cured while ultraviolet curing resin material is irradiated with ultraviolet. The method of curing an optical disc comprises overlaying first and second resin substrates onto each other by way of an adhesive made of ultraviolet curing resin material, the method further comprising clamping the optical disc by ultraviolet transmittance plates at both sides thereof, and curing the adhesive while being irradiated with ultraviolet from outside of the ultraviolet transmittance plates.