| 摘要 |
PURPOSE:To obviate the generation of a distortion in a disk substrate by the displacement of a film body even if a disk hub and the disk substrate thermally expands or contracts differently. CONSTITUTION:The disk hub 4 placed on the central part 5 of the disk substrate 1 is held onto this disk substrate 1 by depositing and forming a film body 7 consisting of a synthetic resin material on the main surface part of the disk hub 4 and the main surface part of the disk substrate 1 through. |
