Patent ID: 8416524

Claim:
A spindle motor comprising: a base portion including at least two through holes and arranged to spread out radially around a central axis; a rotor hub arranged above the base portion to rotate about the central axis; a stator arranged above the base portion, and including coils each including at least one lead wire; and a circuit board arranged radially outward of the at least two through holes; wherein the base portion includes a communicating groove arranged to join the at least two through holes and the circuit board to each other, a width of the communicating groove in a circumferential direction is smaller than a straight-line distance between centers of adjacent ones of the at least two through holes; the at least one lead wire of the coils is arranged to pass inside the at least two through holes and the communicating groove to be electrically connected to the circuit board; and the at least two through holes are sealed with a sealant.