| 摘要 |
PURPOSE: To obtain a disk drive device which can be easily manufactured and has a sufficient performance for shielding dust at a low cost by a shield ring with a sufficient dimensional accuracy. CONSTITUTION: A disk drive device is provided with a hub 1 where a disk is mounted, a drive magnet 2 rotating in one piece with the hub, a stator which is laid out opposite to the drive magnet 2, a shaft 4, and a bearing 5 which is engaged with the shaft 4 and supports the hub 1 so that the hub can freely rotate. The hub 1 is rotated and driven by the relative rotation between the drive magnet 2 and the stator. A shield ring 6 consisting of a baked material where metal powder containing at least one type out of silicon, copper, and magnesium as an admixture in aluminum is sealed to one edge side of the shaft 4, opposes the outer ring of a bearing 5 with a space, and at the same time the outer-periphery surface of the shield ring 6 and the inner-periphery surface of the hub 1 face each other with a small space. |
