| 摘要 |
PROBLEM TO BE SOLVED: To obtain a two-program information recording medium by covering the light reflection coating surfaces of one or both of first and second disks with a photosetting adhesive material in succession to the formation of these disks and sticking the disks back to back to each other. SOLUTION: Light reflection coatings 26", 36" are deposited at the thicknesses adequate for obtaining the reflectivity sufficient for enabling reproduction and the transmittance sufficient for curing the photosetting adhesive materials by the transmission of light through either of the light reflection coatings. The photosetting adhesive material 40" are used to fix the first disk 20" to the second disk 30" by adhering their respective rear surfaces to each other. If the aluminum light reflection coatings 26", 36" are within the adequate thickness range, these coatings have the sufficient transmittance, by which the photosetting adhesive materials 40" are cured by the irradiation with the UV rays transmitting either of the alumium light reflection coatings 26" or 36". |
