Transforming metrology data from a semiconductor treatment system using multivariate analysis
First Claim
1. A method of transforming metrology data from a semiconductor treatment system using multivariate analysis, the method comprising:
- a) obtaining a set of metrology data measured or simulated for one or more substrates treated using the treatment system wherein the set of metrology data includes a set of diffraction signals measured from illuminating a structure on a substrate;
b) determining one or more essential variables for the obtained set of metrology data using multivariate analysis;
c) obtaining a first metrology data measured or simulated for one or more substrates treated using the treatment system, wherein the first metrology data is not one of the metrology data in the set of metrology data obtained in a) wherein the first metrology data is a diffraction signal measured from illuminating a structure on a substrate; and
d) transforming the first metrology data obtained in c) into a second metrology data using the one or more essential variables determined in b).
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Abstract
Metrology data from a semiconductor treatment system is transformed using multivariate analysis. In particular, a set of metrology data measured or simulated for one or more substrates treated using the treatment system is obtained. One or more essential variables for the obtained set of metrology data is determined using multivariate analysis. A first metrology data measured or simulated for one or more substrates treated using the treatment system is obtained. The first obtained metrology data is not one of the metrology data in the set of metrology data earlier obtained. The first metrology data is transformed into a second metrology data using the one or more of the determined essential variables.
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Citations
22 Claims
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1. A method of transforming metrology data from a semiconductor treatment system using multivariate analysis, the method comprising:
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a) obtaining a set of metrology data measured or simulated for one or more substrates treated using the treatment system wherein the set of metrology data includes a set of diffraction signals measured from illuminating a structure on a substrate; b) determining one or more essential variables for the obtained set of metrology data using multivariate analysis; c) obtaining a first metrology data measured or simulated for one or more substrates treated using the treatment system, wherein the first metrology data is not one of the metrology data in the set of metrology data obtained in a) wherein the first metrology data is a diffraction signal measured from illuminating a structure on a substrate; and d) transforming the first metrology data obtained in c) into a second metrology data using the one or more essential variables determined in b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer-readable medium containing computer executable instructions for causing a computer to transform metrology data from a semiconductor treatment system using multivariate analysis, comprising instructions for:
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a) obtaining a set of metrology data measured or simulated for one or more substrates treated using the treatment system wherein the set of metrology data includes a set of diffraction signals measured from illuminating a structure on a substrate; b) determining one or more essential variables for the obtained set of metrology data using multivariate analysis; c) obtaining a first metrology data measured or simulated for one or more substrates treated using the treatment system, wherein the first metrology data is not one of the metrology data in the set of metrology data obtained in a) wherein the first metrology data is a diffraction signal measured from illuminating a structure on a substrate; and d) transforming the first metrology data obtained in c) into a second metrology data using the one or more essential variables determined in b). - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A system to transform metrology data from a semiconductor treatment system using multivariate analysis, the system comprising:
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a metrology system to measure a set of metrology data for one or more substrates treated using the treatment system wherein the metrology system includes an ellipsometer or reflectometer, wherein the set of metrology data includes a set of diffraction signals measured from illuminating a structure on a substrate using the ellipsometer or reflectometer; and a data processing system configured to; a) obtain the set of metrology data; b) determine one or more essential variables for the obtained set of metrology data using multivariate analysis; c) obtain a first metrology data measured using the metrology system for one or more substrates treated using the treatment system, wherein the first metrology data is not one of the metrology data in the set of metrology data obtained in a) wherein the first metrology data is a diffraction signal measured from illuminating a structure on a substrate using the ellipsometer or reflectometer; and d) transform the first metrology data obtained in c) into a second metrology data using the one or more essential variables determined in b).
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Specification