Patent ID: 8211522
Filing Date: 2012-07-03
Classification: G11B,Y10T

Abstract:
1. A manufacturing method for an optical information recording medium having three information recording layers, two intermediate layers, and one light transmitting layer, the method comprising: providing a first UV curable resin on a first information recording layer; forming a first intermediate layer by curing the first UV curable resin by performing first-time UV irradiation to irradiate the first UV curable resin with UV light emitted from above the first UV curable resin at a first dose; providing a second information recording layer on the first intermediate layer; providing a second UV curable resin on the second information recording layer; forming a second intermediate layer by curing the second UV curable resin by performing second-time UV irradiation to irradiate the second UV curable resin with UV light emitted from above the second UV curable resin at a second dose; providing a third information recording layer on the second intermediate layer; providing a third UV curable resin on the third information recording layer; and forming a light transmitting layer by curing the third UV curable resin by performing third-time UV irradiation to irradiate the third UV curable resin with UV light emitted from above the third UV curable resin at a third dose, wherein the first UV curable resin and the second UV curable resin have substantially the same characteristics in terms of the relationship between total UV dose received and coefficient of linear expansion, and wherein the first dose during the first-time UV irradiation, the second dose during the second-time UV irradiation, and the third dose during the third-time UV irradiation are controlled so that a total UV dose received by the first intermediate layer and a total UV dose received by the second intermediate layer become substantially the same.