Patent ID: 7675210

Claim:
A spindle motor, comprising: a housing; a shaft having an outer peripheral face; a sleeve fixed to the housing and rotatably supporting the shaft; a hub having a surface, a hole in which the shaft is press-fitted, a concave part having an inner periphery and being recessed from the surface of the hub in an end region of the hole, and an inside-chamfered portion provided to the inner periphery of the concave part; a valley-shaped concave portion formed by the outer peripheral face of the shaft press-fitted into the hole of the hub and the inside-chamfered portion of the hub; a welded portion formed in one of the valley-shaped concave portion and both the valley-shaped concave portion and the concave part of the hub; an adhesive resin coated on the welded portion; a stator coil attached to the housing; and a rotor magnet fixed to the hub and being across from the stator coil attached to the housing to which the sleeve is fixed.