Patent ID: 8120217

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 defined on the lower surface to accommodate the connection portion of the printed circuit board, and a groove portion defined on the lower surface to communicate with the recess portion, the extending portion of the printed circuit board being arranged in the groove portion; the groove portion includes a bottom surface on which the extending portion is arranged and a first slant surface gradually sloping downwards as the first slant surface extends circumferentially away from one circumferential side of the bottom surface around the central axis; 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 printed circuit board is arranged such that the printed circuit board directly contacts the base portion with the cured resin material being arranged to encapsulate both the through hole of the base portion and an electrode provided on the connection portion of the printed circuit board; and a portion of the cured resin material extends into the groove portion 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 or encapsulated by the cured resin material.