| 摘要 |
PURPOSE:To prevent the deformation of the optical disk by a pressure difference from the outdoor air, the infiltration of dust, etc., and to improve quality as the optical disk by using a material which applies air permeability to spacers for forming a hermetic space part of the stuck optical disk formed by disposing the recording parts of optical disk members in the hermetic space part. CONSTITUTION:The inner peripheral annular spacers 3 forming the space part 6 of the optical disk having the space part 6 of the hermetic state where the respective recording parts 7 of two sheets of the optical disk members 1, 2 are disposed to face each other are constituted of the porous material consisting of a sintered body. |
