Patent ID: 8304945

Claim:
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 lower surface; a recess portion on the lower surface to accommodate the connection portion of the printed circuit board; and a groove portion on the lower surface in communication with the recess portion, the extending portion of the printed circuit board being arranged in the groove portion; 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; the groove portion includes opposite side surfaces, a distance between the opposite side surfaces gradually decreases from a radial outer end portion of the groove portion toward a radial inner end portion thereof; and a portion of the cured resin material extends into the groove portion to contact the opposite side surfaces and to cover and encapsulate only a portion of the extending portion of the printed circuit board such that another portion of the extending portion of the printed circuit board protrudes out from the cured resin material and is not covered by the cured resin material; and the extending portion has opposite lateral surfaces opposing the respective side surfaces of the groove portion, and an average angle between each of the side surfaces of the groove portion and the corresponding lateral surface of the extending portion, when seen in a plan view, is equal to or greater than approximately i0° and smaller than approximately 90°.