| 摘要 |
PURPOSE:To improve parts management and assembly operability by coupling a hub with a disk substrate directly as a collared magnetic body with an adhesive. CONSTITUTION:The magnetic body with a collar part 12d is formed as the hub 12 which is attracted by a magnet provided on a turntable. The collar part 12d of this hub 12 and the opposite magnet surface of the optical information recording disk 10, which has a recording layer 11 and is made of a resin material with a >=10<-11>Pa<-1> coefficient of photoelasticity, are coupled directly by using an adhesive layer 13 which has a <=1,000kg/cm<2> coefficient of lateral elasticity and is >=30mum thick. Then, neither a holder nor an intermediate member for stress absorption is required to obtain the optical information disk which is improved in parts management and assembly operability. |
