Roller assembly for a brush cleaning device in a cleaning module

A roller assembly for supporting or rotating a substrate in a brush cleaning module, comprising:

• a washer assembly sandwiched between a hub and a flange, the washer assembly comprising:
• a first washer;
• and
• a second washer contacting a surface of the first washer, the first washer and second washer having sidewalls defining an annular groove adapted to receive a periphery of a substrate, the annular groove having a width that is less than a thickness of the periphery of the substrate.

A method for cleaning a substrate, comprising:

• transferring a substrate into a cleaning tank;
• guiding the substrate into a groove disposed on a roller disposed in the cleaning tank;
• pressing a peripheral edge of the substrate into the groove so that the major surfaces of the substrate are gripped by opposing sidewalls of the groove;
• and
• rotating one of the substrate or the roller relative to the other while urging a scrubber brush against the major surfaces of the substrate.