Inter-period control system for plasma power delivery system and method of operating the same
First Claim
1. A power delivery system comprising:
- a generator that produces a power signal comprising a periodic repeating pattern of values, the pattern of values produced over a period of time comprising a period of the power signal; and
a control element controlling, based on a measurement of a value of the periodic repeating pattern taken in a period of the power signal prior to a current period of the power signal and a plurality of correlations between elements of multi-dimensional control input values to elements of multi-dimensional output values, the periodic repeating pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
A generator produces output such as delivered power, voltage, current, forward power etc. that follows a prescribed pattern of output versus time where the pattern repeats with a repetition period by controlling sections of the pattern based on measurements taken one or more repetition periods in the past. A variable impedance match network may control the impedance presented to a radio frequency generator while the generator produces the output that follows the prescribed pattern of output versus time where the pattern repeats with a repetition period by controlling variable impedance elements in the match during sections of the pattern based on measurements taken one or more repetition periods in the past.
51 Citations
28 Claims
-
1. A power delivery system comprising:
-
a generator that produces a power signal comprising a periodic repeating pattern of values, the pattern of values produced over a period of time comprising a period of the power signal; and a control element controlling, based on a measurement of a value of the periodic repeating pattern taken in a period of the power signal prior to a current period of the power signal and a plurality of correlations between elements of multi-dimensional control input values to elements of multi-dimensional output values, the periodic repeating pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A power delivery system comprising:
a control system in communication with a memory, the control system to produce an output signal that follows a prescribed pattern over a period of time comprising a period of the output, wherein the prescribed pattern repeats with a repetition period by controlling, based on measurements of an output taken from one or more previous repetition periods of the prescribed pattern and a plurality of correlations between elements of multi-dimensional control input values to elements of multi-dimensional output values stored in the memory, the repetitions of the prescribed pattern. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
-
25. A power delivery system comprising:
a controller to produce an output, the controller being subjected to a periodic disturbance, wherein the periodic disturbance repeats with a repetition period controlling the output signal based on a measurement of a value of the output signal taken one or more repetition periods in the past and a plurality of stored correlations between elements of multi-dimensional control input values to elements of multi-dimensional output values. - View Dependent Claims (26)
-
27. A plasma power delivery system comprising:
-
an impedance matching network that matches a load impedance to a desired impedance in which the load impedance is subject to a periodic modulation pattern of values that repeats with a repetition period; and a control element operably associated with the impedance matching network, the control element controlling, based on a measurement of a value of the load impedance taken one or more repetition periods of the periodic modulation pattern in the past and a plurality of correlations between elements of multi-dimensional control input values to elements of multi-dimensional output values, a variable impedance element in the impedance matching network. - View Dependent Claims (28)
-
Specification