Patent ID: 8358483

Claim:
A spindle motor comprising: a stationary portion; and a rotating portion arranged to rotate with respect to the stationary portion; wherein the rotating portion includes a magnet arranged around a central axis extending in a vertical direction; the stationary portion includes a base member and a magnetic member, the magnetic member being arranged below the magnet and fixed to the base member; the base member includes an upper surface extending perpendicularly or substantially perpendicularly to the central axis, and a wall surface extending in an axial direction; the magnetic member includes an annular plate portion arranged on the upper surface of the base member, and a projecting portion arranged to extend from the plate portion in the axial direction; the projecting portion includes a raised portion defined in a surface thereof opposite to the wall surface and a concave portion defined in a surface of the projecting portion that is opposite to the surface thereof in which the raised portion is defined; and the projecting portion is press fitted to the wall surface with the raised portion in contact with the wall surface.