| 摘要 |
<p>PURPOSE:To highly accurately fix a center hub on a substrate by including a spacer member in the adhesive layer to adhere the center hub and the substrate. CONSTITUTION:The center hub 11 is adhered on the substrate 13 with the adhesive layer 12 that includes the spacer members 14 having grain size of a diameter of (d). By such a constitution, when the hub 14 is pressed against the substrate 13 in adhering it, the adhesive layer 12 of the thickness of (d) can be uniformly secured between both substrates over the entire area. As a result, the hub 11 is fixed on the substrate 13 highly accurately, and an optical disk excellent in tracing property by driving device is obtained.</p> |
