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 1):
A method of monitoring overlay in a manufacturing process in which successive layers are deposited one over another to form a stack and in which each layer includes a periodic structure to be aligned with a periodic structure in another layer, the method comprising:\n illuminating stacked periodic structures with illumination to form positive and negative first order diffraction patterns from the periodic structures; capturing an image of the stacked periodic structures including positive and negative diffraction patterns; and comparing 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): 0.328781491659105
- 35 USC 102 Novelty (BERT): 0.4992597512297688
- Combined Prediction Score: 0.3458293176161713
- Mean Citation Score: 201.720578
- Max Citation Score: 239.64441
- Similarity Product: 163.15756118453982

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