Patent ID: 8516685
Filing Date: 2013-08-27
Classification: G11B,Y10T

Abstract:
1. A method of manufacturing a disk drive device including a base member, a hub on which a disk is mounted, a shaft, and a sleeve housing the shaft as components, the shaft and the sleeve being configured to be relatively rotatable so as to form a bearing unit, and the hub being supported on the base member via the bearing unit, the method comprising: preparing a cleaning tank filled with purified water, radiating an ultrasonic wave of a first frequency onto a first position in the cleaning tank; immersing at least one component of said components at the first position; transporting said at least one component at the first position to a second position; radiating an ultrasonic wave of a second frequency different from the first frequency onto the second position removed from the first position by a predetermined interval in the cleaning tank; taking said at least one component from the second position to outside of the cleaning tank; drying said at least one component; and assembling the disk drive device including said at least one component in a clean area that has been transported in a continuous process from the cleaning tank and having a predetermined level of cleanliness or higher level of cleanliness.