Patent ID: 8773813
Filing Date: 2014-07-08
Classification: G11B,Y10T

Abstract:
1. A subassembly of a disk drive device comprising: a base member; a bearing unit arranged on the base member; and a hub member that has both an outer cylinder part extending in the axial direction of the bearing unit for holding a recording disk and an outward extension portion formed continuously with the outer cylinder part and extending outward in the radial direction of the recording disk and that is rotatably supported by the bearing unit, wherein a barcode, including at least two segments encoded with an identification information of the subassembly of the disk drive, is displayed in the hub member or the base member, wherein the bearing unit includes a shaft and a sleeve, one of which is capable of rotating relative to the base member, and wherein the identification information contains at least one of (i) a manufacturing related information of the bearing unit, (ii) an information regarding back electromotive force generated in a drive coil of the subassembly of the disk drive device and (iii) a bearing component related information related to manufacturing of at least one of the shaft and the sleeve forming the bearing unit and the base member.