| 摘要 |
PURPOSE:To minimize the use amount of an adhesive, to reduce damages on a recording layer and to make positioning easy by forming stair-like parts on the outside wall of an inner spacer and the inside wall of an outer spacer for two disk substrates. CONSTITUTION:The recording layer 2 is provided on the substrate 1 having a center hole 10. The outside wall 7 of the inner spacer 4 and the inside wall 8 of the outer spacer 5 are shaped stair-like. The substrate 1 is made contact to the flat part of the wall 7 and wall 8. The back substrate 3 is also fitted to be supported by the projection 9 on the top of stair of the spacer 4 and the top of stair of the spacer 5, with leaving a space on the layer 2. Then the projected part 9 of the spacer 4 and the outer side of the substrate 3 where the substrate touches are fixed and unified with an adhesive. Thereby, the amount of the adhesive used for stacking the substrates is minimized, which reduces damage caused by the adhesive on the recording layer. Moreover, positioning of the substrates can be easily performed. |
