| 摘要 |
PURPOSE:To prevent the bleeding out of a hot melt agent at the time of adhesion by providing a part where the hot melt agent is not applied in the outer peripheral part of an upper substrate and applying the hot melt agent on the corresponding part of a lower substrate, then adhering the substrates. CONSTITUTION:The optical disk medium is constituted of the upper substrate 1 and the lower substrate 2. The outer peripheral part of the upper substrate 1 and the lower substrate 2 is coated with a doughnut-shaped thin film prior to the application of the hot melt agent 3. The film is then stripped after the application of the hot melt agent and the uncoated region 5 where the hot melt agent 3 is not applied is provided circumferentially in the outside peripheral part of the upper optical disk medium 1 and the lower substrate 2. The upper substrate 1 and the lower substrate 2 are mated and are adhered by pressurization. |
