Patent ID: 8363353

Claim:
A spindle motor comprising: a stationary portion; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion; wherein the stationary portion includes: a base portion arranged to extend radially outward around the central axis; a coil arranged above the base portion; and a circuit board fixed to a lower surface of the base portion; a lead wire arranged to extend from the coil includes a first solder portion coated with a first solder; the base portion includes a base hole portion defined by a through hole; the circuit board includes a board hole portion defined by a through hole, a cut, or a slit, the board hole portion being defined at a position overlapping with the base hole portion; the lead wire is arranged to extend downward through the base hole portion and the board hole portion, and the first solder portion thereof is soldered to the circuit board through a second solder portion; an upper end portion of the first solder portion is arranged above an upper surface of the circuit board; and an inequality d 1 >(d 2 −d 3 )/2 is satisfied; where d 1 denotes an axial distance between the upper end portion of the first solder portion and the upper surface of the circuit board, d 2 denotes an opening width of the board hole portion, and d 3 denotes a diameter of the lead wire.