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 45):
A method of manufacturing devices comprising:\n a lithographic process step, wherein, before or after performing the lithographic process step, measurements are obtained of first and second targets on a substrate by a method comprising,\n illuminating a first target with first radiation, \n substantially simultaneously illuminating a second target with second radiation, the first radiation and the second radiation including wavelengths less than 100 nm, \n detecting, at one or more first detection locations, portions of the first radiation that have been diffracted in a first direction by features of the first target, and \n detecting, at one or more second detection locations, portions of the second radiation that have been diffracted in a second direction by features of the second target; and \n using the obtained measurements to adjust parameters of the lithographic process step for the processing of the substrate and/or further substrates.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 86.0
- Lexical Diversity: 2.11111
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14794013', '15435593', '15683216', '14838268', '15834763']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7059111801865753
- 35 USC 102 Novelty (BERT): 0.5230791578865523
- Combined Prediction Score: 0.687627977956573
- Mean Citation Score: 343.0575340000001
- Max Citation Score: 365.839
- Similarity Product: 304.32875158411264

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