PATENT CLAIM ANALYSIS

Application Number: 16280521
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-08
Patent Classification: ["355", "055000"]

Abstract:
For determining a focus position of a lithography mask (e.g.,  5 ), a focus stack of a measurement region free of structures to be imaged is recorded and the speckle patterns of the recorded images are evaluated.

Claim (Index 1):
A method for determining a focus position of a lithography mask, the method comprising the following steps:\n 1.1. providing an optical system having an imaging optical unit for imaging lithography masks, 1.2. providing a lithography mask having at least one measurement region which is free of structures to be imaged, 1.3. recording a focus stack of the at least one measurement region of the lithography mask, 1.4. evaluating 2D intensity distributions of the recorded focus stack in a spatially resolved manner, 1.5. wherein evaluating the 2D intensity distributions comprises ascertaining the speckle contrast, and 1.6. wherein evaluating the 2D intensity distributions comprises ascertaining a focus position (z) for which the speckle contrast has a minimum.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 99.0
- Lexical Diversity: 1.32258
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16280494', '15410918', '16047324', '13542625', '10800110']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6954191372407001
- 35 USC 102 Novelty (BERT): 0.5411450873240005
- Combined Prediction Score: 0.6799917322490302
- Mean Citation Score: 275.94220800000005
- Max Citation Score: 448.67203
- Similarity Product: 316.25822858189343

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

Dataset: test