Patent ID: 7940493

Claim:
A spindle motor comprising: a rotor which is coaxially disposed with a center axis and which is provided at its outer periphery with a rotor magnet; a stator which surrounds the rotor and which is disposed at a gap from the rotor magnet in a radial direction; a base having a recess which is opened upward for accommodating the stator, and when a side of the base opposed to the rotor is defined as inside and a side of the base that is opposite from the inside is defined as outside, the recess is located inside; and a flexible circuit substrate having one end connected to an upper side of the stator, wherein: the circuit substrate has an external connecting portion connected to an external power supply; the base is provided, in a portion thereof radially outward of the recess as viewed from the center axis, with an extending portion having a through hole through which the external connecting portion penetrates from the back side to the front side of the base; and an inclined surface is formed on an open end of the through hole along an inward part of the base, and along the through-hole radially inner side as viewed from the center axis, the diameter thereof becomes greater toward the open end.