PATENT CLAIM ANALYSIS

Application Number: 15875156
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["355", "053000"]

Abstract:
Target structures such as overlay gratings (Ta and Tb) are formed on a substrate (W) by a lithographic process. The first target is illuminated with a spot of first radiation ( 456 a , Sa) and simultaneously the second target is illuminated with a spot of second radiation ( 456 b , Sb). A sensor ( 418 ) detects at different locations, portions ( 460 x−,  460 x +) of said first radiation that have been diffracted in a first direction by features of the first target and portions ( 460 y−,  460 y +) of said second radiation that have been diffracted in a second direction by features of the second target. Asymmetry in X and Y directions can be detected simultaneously, reducing the time required for overlay measurements in X and Y. The two spots of radiation at soft x-ray wavelength can be generated simply by exciting two locations ( 710 a , 710 b ) in a higher harmonic generation (HHG) radiation source or inverse Compton scattering source.

Claim (Index 34):
The inspection apparatus of  claim 27 , wherein the illumination system is operable to illuminate the first target and second target with radiation at a non-normal incidence angle relative to a target plane containing the first and second targets, the first detection locations and second detection locations being arrayed asymmetrically about an axis of reflection defined by the incidence angle and the target plane.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 2.11111
- Patent Class: 355.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14794013', '15435593', '15683216', '14838268', '15834763']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7303241945681023
- 35 USC 102 Novelty (BERT): 0.5256237420548215
- Combined Prediction Score: 0.7098541493167743
- Mean Citation Score: 343.0575340000001
- Max Citation Score: 365.839
- Similarity Product: 284.7301340437532

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

Dataset: test