The present invention pertains to a fluid dynamic bearing assembly for
directing bubbles. The assembly includes a stator with a stator bearing
surface. A rotor with a rotor bearing surface rotates with respect to the
stator such that the rotor bearing surface opposes the stator bearing
surface. Lubricating fluid is disposed between the stator bearing surface
and the rotor bearing surface. Features disposed on either the stator
bearing surface or the rotor bearing surface direct the bubbles such that
the fluid dynamic bearing assembly does not require a recirculation
channel.