PATENT CLAIM ANALYSIS

Application Number: 15777162
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["355", "067000"]

Abstract:
A method of measuring a position of an alignment target on a substrate using an optical system. The method includes measuring a sub-segmented target by illuminating the sub-segmented target with radiation and detecting radiation diffracted by the sub-segmented target using a detector system to obtain signals containing positional information of the one sub-segmented target. The sub-segmented target has structures arranged periodically in at least a first direction, at least some of the structures including smaller sub-structures, and each sub-segmented target is formed with a positional offset between the structures and the sub-structures that is a combination of both known and unknown components. The signals, together with information on differences between known offsets of the sub-segmented target are used to calculate a measured position of an alignment target which is corrected for the unknown component of the positional offset.

Claim (Index 7):
The method as claimed in  claim 1 , wherein the signals are further used to determine corrections for subsequent substrates, the corrections for reducing the magnitude of the unknown component of the positional offset in the subsequent substrates.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 93.0
- Lexical Diversity: 2.07143
- Patent Class: 355.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14764939', '15032507', '15105349', '15967861', '15358321']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.733459894775942
- 35 USC 102 Novelty (BERT): 0.500964765532974
- Combined Prediction Score: 0.7102103818516452
- Mean Citation Score: 258.7282
- Max Citation Score: 303.3837
- Similarity Product: 226.3278362731576

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

Dataset: test