Patent ID: 9327918
Filing Date: 2016-05-03
CPC Classification: B65G,H01L

Claim Text:
1. A method of processing a substrate, comprising the steps of: (a) taking an unprocessed substrate out of a cassette to pass the unprocessed substrate to a passing part by means of a transfer robot while rotating the unprocessed substrate through 90 degrees about a second rotation axis extending in a horizontal direction; (b) holding said unprocessed substrate received from said transfer robot in a standing attitude by means of said passing part; (c) transferring said unprocessed substrate from said passing part to a main transport robot to transport said unprocessed substrate to a processing part by means of said main transport robot while rotating said unprocessed substrate through 90 degrees about a first rotation axis extending in a horizontal direction; (d) transferring a processed substrate from said processing part to said main transport robot to pass said processed substrate to said passing part by means of said main transport robot while rotating said processed substrate through 90 degrees about said first rotation axis; (e) holding said processed substrate received from said main transport robot in a standing attitude by means of said passing part; and (f) transferring said processed substrate from said passing part to said transfer robot to transport said processed substrate into a cassette by means of said transfer robot while rotating said processed substrate through 90 degrees about said second rotation axis, said steps (a) and (f) including the step of moving a second hand for gripping said substrate forwardly and backwardly in a direction parallel to said second rotation axis by means of said transfer robot, said steps (c) and (d) including the step of moving a first hand for gripping said substrate forwardly and backwardly in a direction parallel to said first rotation axis by means of said main transport robot, said steps (a) and (f) including the step of moving the substrate upwardly and downwardly in a vertical direction by means of said transfer robot while maintaining the substrate in a standing attitude without pivoting, said steps (c) and (d) include the step of moving the substrate upwardly and downwardly in a vertical direction by means of said main transport robot while maintaining the substrate in a standing attitude without pivoting, wherein said processing part includes a back surface cleaning processing unit for cleaning the back surface of a substrate; and said transfer robot rotates said substrate received from said cassette through 90 degrees in said step (a) and said main transport robot rotates said substrate received from said passing part through 90 degrees in said step (c) to invert and transport the substrate to said back surface cleaning processing unit.