PATENT CLAIM ANALYSIS

Application Number: 15772432
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-12
Patent Classification: ["355", "067000"]

Abstract:
Measurement data is obtained for calibration fields that have been exposed by a lithographic apparatus using different field layouts and exposure sequences. The measurement data is classified in subsets by scan direction, step direction, field size and other variables. The measurement data is indexed by a time value that varies through each exposure sequence. Time values within different exposure sequences can be related using a normalized time value based on the beginning and end of each exposure sequence. An inter-field performance model is calculated for each subset. An intra-field component of a performance model is calculated with time as a third dimension. The time-indexed performance model is used to determine intra-field corrections for a variety of product exposures having product layouts and product exposure sequences different to the calibration fields, based on time and other a variables of the product layout and product exposure sequence.

Claim (Index 14):
A method of calibrating a lithographic apparatus, the method comprising:\n obtaining a performance model generated by the generating step of the method as claimed in  claim 1 ; using the performance model to determine a set of data for a plurality of product fields by the using step of the method as claimed in  claim 1 ; and based on the set of data for the first plurality of product fields supplying corrections to be used by the lithographic apparatus when applying product fields on a product substrate using the product exposure sequence.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 91.0
- Lexical Diversity: 2.01299
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15736451', '14103486', '13012386', '15763780', '12621143']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6977952794064538
- 35 USC 102 Novelty (BERT): 0.4791458411031216
- Combined Prediction Score: 0.6759303355761206
- Mean Citation Score: 222.642998
- Max Citation Score: 272.65967
- Similarity Product: 241.0067552641547

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 0

Dataset: test