| 摘要 |
PURPOSE:To prevent the deviation and peeling of disks by forming an adhesive layer as a pressure-sensitive adhesive, providing >=2 through-holes exterior of the information areas on inner and outer peripheries after the adhesion and fitting the members fitted into the through-holes without or by using the adhesive. CONSTITUTION:Recording layers or reflecting layers 2, 2' are provided respectively on one surface of substrates 1,1' and the substrates with the layers 2, 2' disposed to face the inner side are tightly adhered and stuck to each other via the pressure-sensitive adhesive 3. Further, the through-holes 4, 4' are bored exterior of the recoding areas on the inner and outer peripheries and thereafter, the holes 4, 4' are fitted to each other with the member of the same material as the material of the substrates. The through-holes 4, 4' have 1 to 3mm in hole diameter and are not always required to be round in shape. The fitting may be executed simply by pouring the adhesive into the holes 4, 4'. Further, the adhesive of a slow setting time is more preferable. The sealing between the substrates is ensured, the deviation of the disks is prevented and the reliability is enhanced in this way. |
