PATENT CLAIM ANALYSIS

Application Number: 16416775
Application Type: Utility
Filing Date: 2019-05
Publication Date: 2019-09
Patent Classification: ["702", "104000"]

Abstract:
Optical metrology is used to calibrate the plane-of-incidence (POI) azimuth error by determining and correcting an azimuth angle offset. The azimuth angle offset may be determined by measuring at least a partial Mueller matrix from a calibration grating on a sample held on a stage for a plurality of POI azimuth angles. An axis of symmetry is determined for a curve describing a value of a Mueller matrix element with respect to POI azimuth angle, for each desired wavelength and each desired Mueller matrix element. The axis of symmetry may then be used to determine the azimuth angle offset, e.g., by determining a mean, median or average of all, or a filtered subset, of the axes of symmetry. If desired, an axis of symmetry may be determined for data sets other than Mueller matrix elements, such as Fourier coefficients of measured signals.

Claim (Index 15):
The apparatus of  claim 14 , wherein the processor is further configured to filter the axes of symmetry before using the axes of symmetry to determine the azimuth angle offset, wherein filtering removes any axis of symmetry that corresponds to a wavelength having sensitivity to the POI azimuth angle below a threshold.

Metadata:
- Claim Count in Document: 37.0
- Percentile: 100.0
- Lexical Diversity: 1.98734
- Patent Class: 702.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['13831456', '12357294', '15789992', '12169331', '12696974']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2262414673446227
- 35 USC 102 Novelty (BERT): 0.6329661504122968
- Combined Prediction Score: 0.2669139356513901
- Mean Citation Score: 334.156622
- Max Citation Score: 656.8438
- Similarity Product: 537.3919679687381

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test