Wafer scrubbing brush core having an internal motor and method of making the same

1. Field of the Invention A brush core and method of making a brush core are provided. The brush core is configured to be implemented in substrate preparation systems. The brush core is connected between a first end and a second end of a non-rotating shaft. A motor is contained within the brush core for rotating the brush core around the non-rotating shaft. The first end and the second end are each capable of being adjusted to calibrate and position the brush core. The calibrated position of the brush core can be set to compensate for a skewed substrate, or to achieve a desired pressure application profile over the substrate.