Patent ID: 8299668
Filing Date: 2012-10-30
Classification: H02K

Abstract:
1. A spindle motor comprising: a stator unit including a stator concentric with a central axis, a base portion with an axially extending through hole, and a printed circuit board including a connection portion and an extending portion extending from the connection portion, the connection portion connected to a conductive wire extending from the stator and through the through hole; and a rotor unit rotatably supported by the stator unit about the central axis with respect to the stator unit; wherein the base portion includes: a cured resin material is provided within the recess portion to cover at least a region extending from a connection point of the connection portion to a boundary between the recess portion and the groove portion; and a trench portion extending upwards from a bottom surface of the groove portion or a protrusion portion protruding downwards from the bottom surface of the base portion is defined in at least a portion of the groove portion to extend between opposite lateral surfaces of the extending portion and corresponding side surfaces of the groove portion; the lower surface of the base portion includes a central region substantially concentric with the central axis and a peripheral region arranged around the central region at a position higher than the central region, the recess portion and the groove portion being arranged within the central region; and the cured resin material is either arranged radially inward from a tip of the protrusion portion or arranged radially inward from a radially outer end portion of the trench portion.