| 摘要 |
PURPOSE:To attain focusing servo control which is stable against an external shock and vibration by sticking a specific material on a metallic thin film surface forming the reflecting surface of the disk record, and sticking a sheet on which a label is printed on the material. CONSTITUTION:The metallic thin film 7 is vapor-deposited on a transparent substrate 6 and the material 8 which is within a dislocation region at room temperature is stuck thereupon and used as a damper. Then, the sheet 9 on which the label is printed is stuck thereupon. Thus, three-layer structure is formed to attain focusing servo control which is stable against an external shock and vibration. |
