> Ultrasonic motors in common have only the use of piezoelectric technology, but
> they work very differently.
>
> White paper on PCBMotors:
> http://www.scribd.com/doc/16154509/pcbmotor

Their area of differentiation seems to be what their name suggests -
*PCB* motors - the stators are directly implemented on the PCB
surface.


                  Russell
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