Patent ID: 6527904
Filing Date: 2003-03-04
Classification: B29C,B29K,B29L,G11B

Abstract:
A method of producing a two-disc laminated optical disc, comprising steps of:forming, on an information recording surface of a first light-transmissible substrate, a first reflecting film capable of partially reflecting and partially transmitting a laser beam; forming, on an information recording surface of a second light-transmissible substrate, a second reflecting film having a reflectance higher than that of the first reflecting film; applying a liquid ultraviolet-setting resin to the first reflecting film formed on the first light-transmissible substrate and the second reflecting film formed on the second light-transmissible substrate; bonding together the above treated first light-transmissible substrate and the second light-transmissible substrate, with a light-transmissible middle layer interposed therebetween; solidifying the liquid ultraviolet-setting resin, by means of an ultraviolet light directed through the first light-transmissible substrate; wherein the first light-transmissible substrate and the second light-transmissible substrate are bonded together first in a vacuum condition, then by means of press using a high pressure air.