| 20090212660 | ULTRASONIC MOTOR AND METHOD FOR MANUFACTURING ULTRASONIC MOTOR - [Purpose] The present invention relates to an ultrasonic motor having a stator which includes a piezoelectric element for moving a rotor in a prescribed direction by applying a predetermined ultrasonic voltage thereto, and the rotor which is fixed to the stator by a frictional force, and a method for manufacturing an ultrasonic motor, and it has for its purpose to attain decrease of dust appearance by enhancement of a wear resistance, a different hardness, or the like in such a way that a contact part of at least either of a stator and a rotor which constitute the ultrasonic motor is irradiated with ions. | 08-27-2009 |
