| 摘要 |
There is provided a spindle motor including: a sleeve including a hollow part having a shaft inserted thereinto and rotatably supporting the shaft; a thrust plate coupled to a lower portion of the shaft in an axial direction to thereby rotate together with the shaft; a cover plate coupled to a lower portion of the sleeve in the axial direction and covering the hollow part; and a step part stepped upwardly from a lower surface of the thrust plate in the axial direction so that the shaft and the thrust plate are easily coupled to each other and having surface roughness greater than that of other portions of the thrust plate.
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