Method and system of determining chamber seasoning condition by optical emission
First Claim
1. A plasma processing system comprising:
- a plasma reactor;
a light detection device coupled to said plasma reactor to receive light emitted from a plasma formed within said plasma reactor; and
a controller coupled to said light detection device, said controller configured to measure a signal related to the received light detected by the light detection device and to correlate a change between the measured signal and a target signal corresponding to a seasoning state of said plasma reactor, wherein the measured signal related to e received light is a product of multivariate analysis.
1 Assignment
0 Petitions
Accused Products
Abstract
A plasma processing system that comprises a process chamber, a plasma source, a light detection device and a controller. The controller is useful for determining a seasoning state of the plasma processing system. The present invention further provides a method of determining the seasoning state of a plasma processing system comprising the steps of forming a first plasma in the process chamber utilizing the plasma source; measuring a first signal related to light emitted from the first plasma using the light detection device and storing the first signal using the controller; forming a second plasma in the process chamber utilizing the plasma source; measuring a second signal related to light emitted from the second plasma using the light detection device and storing the second signal using the controller; and correlating a change between the first signal and the second signal with a seasoning state of the plasma processing system.
13 Citations
41 Claims
-
1. A plasma processing system comprising:
-
a plasma reactor;
a light detection device coupled to said plasma reactor to receive light emitted from a plasma formed within said plasma reactor; and
a controller coupled to said light detection device, said controller configured to measure a signal related to the received light detected by the light detection device and to correlate a change between the measured signal and a target signal corresponding to a seasoning state of said plasma reactor, wherein the measured signal related to e received light is a product of multivariate analysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of determining a seasoning state of a plasma processing system, wherein said plasma processing system comprises a process chamber, a plasma source, a light detection device and a controller, said method comprises:
-
forming a first plasma in said process chamber utilizing said plasma source;
measuring a first signal related to light emitted from said first plasma using said light detection device and storing said first signal;
forming a second plasma in said process chamber utilizing said plasma source;
measuring a second signal related to light emitted from said second p1 a using said light detection device and storing said second signal using said controller; and
correlating a change between said first signal and said second signal with a seasoning state of said plasma processing system, wherein the first signal or the second signal, or both the first and second signal is provided as a product of multivariate analysis. - View Dependent Claims (15, 16, 17, 18, 19)
-
-
20. A method of determining a seasoning state of a plasma processing system, wherein said plasma processing system comprises a process chamber, a plasma source, a light detection device and a controller, said method comprises:
-
forming a plasma in said process chamber utilizing said plasma source;
measuring a first signal related to light emitted from said plasma using said light detection device and storing said first signal;
measuring a second signal related to light emitted from said plasma using said light detection device and storing said second signal using said controller; and
correlating a change between said first signal and said second signal with a seasoning state of said plasma processing system, wherein the first signal or the second signal, or both the first and second signal is provided as a product of multivariate analysis.
-
-
21. A method of determining a seasoning state of a plasma processing system, wherein said plasma processing system comprises a process chamber, a plasma source, a light detection device and a controller, said method comprises:
-
loading a substrate into said plasma processing system;
forming a plasma to facilitate processing of said substrate;
measuring a signal related to light emitted from said plasma;
comparing the measured signal with a target signal determined for said plasma processing system; and
determining a seasoning state of said plasma processing system from a result of said comparing of the measured signal with said target signal, wherein the measure signal is a product of multivariate analysis. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
-
-
29. A method of determining a seasoning state of a plasma processing system, wherein said plasma processing system comprises process chamber, a plasma source, a light detection device and a controller, said meth comprises:
-
loading a first substrate into said plasma processing system;
forming a first plasma to facilitate processing of said first substrate;
measuring a first signal related to light emitted from said first plasma and storing said first signal using said controller;
unloading said first substrate;
loading a second substrate into said plasma processing system;
forming a second plasma to facilitate processing of said second substrate;
measuring a second signal related to light emitted from said second plasma and storing said second signal using said controller;
determining a difference signal from said second signal and said first signal;
comparing said difference signal with a target signal; and
determining a seasoning state of said plasma processing system from and comparing of said difference signal with said target signal, wherein said first and second signals are a product of multivariate analysis. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
-
-
37. A detection system comprising:
-
a light detection device configured to be coupled to a plasma processing system to receive light emitted from a plasma;
a controller coupled to said light detection device, said controller configured to measure a signal related to the received light and to correlate a change between said signal and a target signal with a seasoning state of said plasma processing system herein the measured signal related to the received light is a product of multivariate analysis.
-
-
38. A method for constructing a seasoning model for a plasma processing system, said method comprises:
-
measuring a plurality of optical signals;
determining a first set of said plurality of optical signals corresponding to an unseasoned plasma processing system;
forming a second set of said plurality of optical signals by discarding aid first set of said plurality of optical signals; and
performing principal components analysis on said second set of said plurality of said optical signals, wherein an output of said principal components analysis comprises said seasoning model. - View Dependent Claims (39, 40, 41)
-
Specification