Patent ID: 7122922
Filing Date: 2006-10-17
Classification: G11B,H02K

Abstract:
1. A spindle motor comprising: a rotatable component defining a bearing gap with a stationary component; a magnet affixed to the rotatable component; a stator, affixed to the stationary component, for generating an electromagnetic force that interacts with the magnet for driving the rotatable component, the stationary component including a base plate, wherein the base plate defines a minimal axial gap with the magnet, the base plate comprising a first material positioned adjacent to the magnet, and a second material having a predefined stiffness, wherein the second material is positioned at a greater radial distance from the magnet than the radial distance between the stator and the magnet, wherein the stator is positioned radially outside of the magnet and wherein the second material is positioned at least one of radially outside of the stator and axially adjacent to the stator.