| CPC B08B 1/20 (2024.01) [B08B 3/12 (2013.01); B24B 37/34 (2013.01)] | 10 Claims |

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1. A cleaning module comprising:
a first transfer mechanism for transferring a substrate with a surface to be polished facing downward up to a substrate grip or release position on a downstream side along a transfer passage;
a cleaning tank disposed at a position spaced apart from the transfer passage, the cleaning tank being for cleaning the substrate with the surface to be polished facing downward;
a transfer machine for transferring the substrate between the substrate grip or release position of the transfer passage and the cleaning tank; and
a second transfer mechanism for transferring the substrate transferred to the substrate grip or release position from the cleaning tank by the transfer machine to further downstream along the transfer passage.
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