Patent ID: 8852388
Filing Date: 2014-10-07
Classification: C23C,H01J,H01L

Abstract:
1. A plasma processor, comprising at least: a processing chamber having a closed space and holding a substrate therein; gas supply mechanism for supplying at least an etching gas and an etching-resistant layer forming gas for forming polymers into the processing chamber; first exhaust mechanism for reducing the pressure in the processing chamber; power applying mechanism for applying high-frequency power; plasma generating mechanism for, by high-frequency power being applied by the power applying mechanism, forming a plasma from the processing gas supplied into the processing chamber; heating mechanism for heating the processing chamber; cooling mechanism for cooling the processing chamber, the cooling mechanism configured with: second exhaust mechanism for reducing the pressure in the annulus of the seal member; and control mechanism for controlling the operations of the gas supply mechanism, first exhaust mechanism, second exhaust mechanism, power applying mechanism, heating mechanism and cooling mechanism, the plasma processor producing deposits within the processing chamber by processing using the processing gas, wherein the cooling fluid is water, the distance between the cooling member and the processing chamber is set to be more than 0 μm and equal to or less than 100 μm, the control mechanism is configured to control the second exhaust mechanism so that the pressure in the annulus of the seal member is reduced to a predetermined first target pressure when the power applying mechanism does not apply high-frequency power to the plasma generating mechanism, and to control the second exhaust mechanism so that the pressure in the annulus of the seal member becomes a second target pressure higher than the first target pressure when the power applying mechanism applies high-frequency power to the plasma generating mechanism, and the first target pressure P (Pa) is a predetermined pressure which is set so as to satisfy the following relational equation: (where, T (K) is the absolute temperature of the air, δ (μm) is the molecular diameter of the air (=3.72×10 −4 ), and g (μm) is the distance between the cooling member and the processing chamber) and the control mechanism is configured to control the second exhaust mechanism so that the pressure in the annulus of the seal member is high when the amount of the high frequency power applied to the plasma generating mechanism by the power applying mechanism is large, and to control the second exhaust mechanism so that the pressure in the annulus of the seal member is low when the amount of the high-frequency power applied to the plasma generating mechanism by the power applying mechanism is small.