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 13):
A method comprising:\n providing first measurement data for a first plurality of fields that have been exposed by a lithographic apparatus on one or more substrates using a first exposure sequence; providing further measurement data for one or more further pluralities of fields that have been exposed by the lithographic apparatus on one or more substrates, each of the one or more further pluralities of fields having been exposed using an exposure sequence different from the first exposure sequence; and calibrating the performance model based on the first measurement data and the further measurement data, wherein the performance model is configured to generate a set of data for at least a first plurality of product fields having a product exposure sequence, and wherein for generating the performance model the first measurement data and further measurement data are indexed at least partly on the basis of a time value that varies over each exposure sequence, and wherein the set of data for the product fields is generated at least partly by reference to a time value that varies over 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): 0.6977129116295492
- 35 USC 102 Novelty (BERT): 0.4796400577669036
- Combined Prediction Score: 0.6759056262432847
- Mean Citation Score: 222.642998
- Max Citation Score: 272.65967
- Similarity Product: 239.25616197898805

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

Dataset: test