PATENT CLAIM ANALYSIS

Application Number: 15988677
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["356", "509000"]

Abstract:
A metrology apparatus is disclosed that measures a structure formed on a substrate to determine a parameter of interest. The apparatus comprises an optical system configured to focus radiation onto the structure and direct radiation after reflection from the structure onto a detector, wherein: the optical system is configured such that the detector detects a radiation intensity resulting from interference between radiation from at least two different points in a pupil plane field distribution, wherein the interference is such that a component of the detected radiation intensity containing information about the parameter of interest is enhanced relative to one or more other components of the detected radiation intensity.

Claim (Index 22):
The apparatus of  claim 16 , wherein the optical system comprises:\n a beam splitter configured to split a radiation beam into a first radiation beam and a second radiation beam, and the optical system is configured such that:\n the first radiation beam and the second radiation beam propagate in opposite directions around a common optical path comprising a first branch and a second branch, \n the first radiation beam propagating from the beam splitter to the substrate along the first branch and from the substrate back to the beam splitter along the second branch, \n the second radiation beam propagating from the beam splitter to the substrate along the second branch and from the substrate back to the beam splitter along the first branch; and \n a phase shift is applied to the first radiation beam relative to the second radiation beam, the phase shift being such as to cause the component of the detected radiation intensity containing information about the parameter of interest to be enhanced by interference relative to the one or more other components of the detected radiation intensity.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 93.0
- Lexical Diversity: 1.73846
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15387431', '14970247', '15683126', '12805852', '15723820']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7424164451778708
- 35 USC 102 Novelty (BERT): 0.4881987260163748
- Combined Prediction Score: 0.7169946732617212
- Mean Citation Score: 266.531982
- Max Citation Score: 271.62698
- Similarity Product: 240.69460721211675

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