TRAJECTORY BASED CONTROL OF PLASMA PROCESSING
First Claim
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1. A plasma processing system, comprising:
- a plasma processing chamber for processing a substrate and including a plurality of parameter functions for controlling the processing, at least one power supply operatively associated with a plasma within the chamber, and at least one gas supply supplying a gas for the plasma; and
a control system operatively coupled to the chamber, the control systems controls the plurality of parameter functions according to respective trajectories extending over a time period between respective start values and stop values and being controlled at a plurality of temporal points within the time period separated by a fixed time increment.
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Abstract
A method of controlling a plasma processing according to trajectories connecting start and stop values of parameters controlling the plasma processing, for example, gas flow and power supplied to generate the plasma. The trajectories maybe based on equations including at least time as a variable. At set times within the processing, the values of the parameters are updated according to the predetermined trajectories. Sensors associated with the chamber may also adjust the trajectories, provide variables to the equations, and/or define the trajectories.
16 Citations
15 Claims
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1. A plasma processing system, comprising:
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a plasma processing chamber for processing a substrate and including a plurality of parameter functions for controlling the processing, at least one power supply operatively associated with a plasma within the chamber, and at least one gas supply supplying a gas for the plasma; and a control system operatively coupled to the chamber, the control systems controls the plurality of parameter functions according to respective trajectories extending over a time period between respective start values and stop values and being controlled at a plurality of temporal points within the time period separated by a fixed time increment. - View Dependent Claims (2, 3, 4, 5, 13)
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6. A method of controlling a plasma processing chamber, the method comprising:
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setting start and stop values for a plurality of control functions extending over a time period for plasma processing a substrate within the chamber; defining trajectories of the control functions connecting the start and stop values over the time period; and at each of a plurality of differing time points within the time period, determining values of the control functions according to the trajectories. - View Dependent Claims (7, 8, 9, 10, 11, 12, 14, 15)
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Specification