Patent ID: 7265469

Claim:
A spindle motor comprising: a rotor section; a stator section; and a thrust dynamic pressure fluid bearing and a radial dynamic pressure fluid bearing for sustaining the rotor section to be rotatable freely with respect to the stator section by employing lubrication fluid, wherein the thrust dynamic pressure fluid bearing is provided with first and second thrust dynamic pressure fluid bearing sections each generating a dynamic pressure in a direction opposite to each other, and wherein the lubrication fluid is filled in a filling section as a prescribed gap provided between the rotor section and the stator section, and wherein the filling section is constituted by a first filling section that links one end section opened to the outside, the second thrust dynamic pressure fluid bearing section, the first thrust dynamic pressure fluid bearing section and the radial dynamic pressure fluid bearing in order and a second filling section that links a point allocated between the second and first thrust dynamic pressure fluid bearing sections and another point allocated between the first thrust dynamic pressure fluid bearing section and the radial dynamic pressure fluid bearing in the first filling section.