Patent ID: 6874515

Claim:
A substrate dual-side processing apparatus comprising: a processor to apply a specific process to a front surface and a rear surface of a substrate; a reversing unit to reverse the substrate; and a substrate-transfer mechanism to transfer the substrate between the processor and the reversing unit. wherein the reversing unit has a pair of holders for holding the substrate at the front and rear surfaces, a drive mechanism for driving the pair of holders so that the holders become close to or apart from each other, and a rotating mechanism for rotating the substrate, thus the substrate being reversed while held by the holders. wherein each of the pair of holders has at least three supporters for supporting substrate edges when the substrate is held by the holders, and wherein each of the three supporters has a wafer-slide blocking wall to engage with the substrate edges, a sloping step sloping down from a lower edge of the wafer-slide blocking wall to an inner side of each supporter and a sloping guide face ascending from an upper edge of the wafer-slide blocking wall to outside.