PATENT CLAIM ANALYSIS

Application Number: 15922881
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["355", "055000"]

Abstract:
A lithographic apparatus includes a number of sensors for measuring positions of features on a substrate prior to applying a pattern. Each sensor includes an imaging optical system. Position measurements are extracted from pixel data supplied by an image detector in each sensor. The imaging optical system includes one or more light field modulating elements and the processor processes the pixel data as a light-field image to extract the position measurements. The data processor may derive from each light-field image a focused image of a feature on the substrate, measuring positions of several features simultaneously, even though the substrate is not at the same level below all the sensors. The processor can also include corrections to reduce depth dependency of an apparent position of the feature include a viewpoint correction. The data processor can also derive measurements of heights of features on the substrate.

Claim (Index 1):
A lithographic apparatus for applying a pattern onto a substrate, the apparatus including:\n at least one sensor for measuring positions of features on the substrate prior to applying the pattern, the sensor comprising an imaging optical system, and an image detector for capturing an image formed by the imaging optical system; a data processor for extracting position measurements from pixel data supplied by the image detector; and a controller arranged to control the lithographic apparatus to apply the pattern to the substrate using the positions measured by the sensor, wherein the imaging optical system includes one or more light field modulating elements and the data processor is arranged to process the pixel data as a light-field image to extract the position measurements.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 90.0
- Lexical Diversity: 1.88889
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15325048', '14322625', '12908564', '15736142', '14421434']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6975311588346426
- 35 USC 102 Novelty (BERT): 0.5006480230845921
- Combined Prediction Score: 0.6778428452596376
- Mean Citation Score: 228.626602
- Max Citation Score: 332.79144
- Similarity Product: 326.5048631157446

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