Patent ID: 7515379

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 a surface of the extending portion along an inward part of the base and to which the circuit substrate is to be attached is formed so that a portion of the surface on the side radially outward of the location of the through hole is higher in the axial direction of the center axis than a portion of the surface on the side radially inward thereof.