| 20090079527 | Yoke-integrated magnet - The present invention provides a yoke-integrated magnet, including: a ring-shaped bond magnet containing a rare earth iron-based alloy magnetic powder and a synthetic resin binder; and a ring-shaped back yoke provided on an inner periphery or an outer periphery of the bond magnet to be integral with the bond magnet, in which at least a surface of the bond magnet at which the bond magnet does not contact with the back yoke is covered with an injection molding layer of a thermoplastic resin which does not contain tin. The yoke-integrated magnet of the invention is excellent in corrosion resistance and dimension accuracy and is free from the risk of contamination with tin. | 03-26-2009 |
