PATENT CLAIM ANALYSIS

Application Number: 15757119
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["382", "141000"]

Abstract:
A method of monitoring overlay is used in a manufacturing process in which successive layers are deposited one over another to form a stack. Each layer may include a periodic structure such as a diffraction grating to be aligned with a periodic structure in another layer. The stacked periodic structures may be illuminated to form + and − first order diffraction patterns from the periodic structures. An image of the stacked periodic structures may be captured including + and − diffraction patterns. The + and − diffraction patterns may be compared to calculate the overlay between successive layers.

Claim (Index 10):
Apparatus for monitoring overlay errors between stacked periodic structures comprising an illumination source, an image capturing device, and an analysis unit including at least one processor, wherein the processor is configured to analyse an image of stacked periodic structures including positive and negative diffraction patterns, and compare the positive and negative diffraction patterns to calculate the overlay between successive layers.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 90.0
- Lexical Diversity: 1.87273
- Patent Class: 382.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14161398', '15114175', '15305166', '15159009', '15092329']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3303744117791503
- 35 USC 102 Novelty (BERT): 0.491387950294865
- Combined Prediction Score: 0.3464757656307217
- Mean Citation Score: 201.720578
- Max Citation Score: 239.64441
- Similarity Product: 181.51754050635336

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

Dataset: test