Patent ID: 8561572
Filing Date: 2013-10-22
Classification: C23C,H01J,Y10T

Abstract:
1. A gas supply system that supplies gases into a processing chamber where a substrate is processed, the system comprising: a processing gas supply unit that supplies a processing gas to be used to process the substrate; a processing gas supply passage through which the processing gas from the processing gas supply unit flows; a first branch passage and a second branch passage branching from the processing gas supply passage and connected to the processing chamber at different positions; a divided flow rate adjustment unit that adjusts the divided flow rates of the processing gas diverted into the branch passages from the processing gas supply passage by using flow controllers; an additional gas supply unit that supplies an additional gas; an additional gas supply passage through which the additional gas from the additional gas supply unit is made to flow into the second branch passage at a position further downstream relative to the divided flow rate adjustment unit; a divided flow rate adjustment unit controller that switches between a divided flow ratio control which adjusts the divided flow rates to hold the divided flow ratio in the branch passages at a target divided flow ratio and a steady pressure control which adjusts the divided flow rates to hold the pressure in the first branch passage, and executes each of the controls on the divided flow rate adjustment unit; and a control unit configured to execute a process comprising: