PATENT CLAIM ANALYSIS

Application Number: 15968743
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["355", "055000"]

Abstract:
A method and apparatus for obtaining focus information relating to a lithographic process. The method includes illuminating a target, the target having alternating first and second structures, wherein the form of the second structures is focus dependent, while the form of the first structures does not have the same focus dependence as that of the second structures, and detecting radiation redirected by the target to obtain for that target an asymmetry measurement representing an overall asymmetry of the target, wherein the asymmetry measurement is indicative of focus of the beam forming the target. An associated mask for forming such a target, and a substrate having such a target.

Claim (Index 65):
A method of obtaining focus information relating to a lithographic process, the method comprising:\n illuminating a first target, the first target comprising alternating first and second structures, the form of the second structures being focus dependent such that its form depends upon the focus of a patterned beam used to form the first target and the form of the first structures not having the same focus dependence as that of the second structures, wherein a patterning device is used to produce the patterned beam, the patterning device comprising first structure features to form the first structures and second structure features to form the second structures, the second structure features comprise a low resolution substructure feature to form low resolution substructures; and the second structure features comprise a high resolution substructure feature to form high resolution substructures, the high resolution substructures comprising a plurality of elongate high resolution substructures arranged essentially parallel to the low resolution substructures; and detecting radiation scattered by the first target to obtain for that first target an asymmetry measurement representing an overall asymmetry of the first target, the asymmetry measurement being indicative of the focus of the patterned beam when forming the first target.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 93.0
- Lexical Diversity: 2.08929
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15104212', '15358321', '13140292', '15179509', '15429952']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7144923973941611
- 35 USC 102 Novelty (BERT): 0.5418066494669502
- Combined Prediction Score: 0.6972238226014401
- Mean Citation Score: 301.96685
- Max Citation Score: 427.6808
- Similarity Product: 372.95867933068274

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

Dataset: test