PATENT CLAIM ANALYSIS

Application Number: 15947459
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["355", "056000"]

Abstract:
Fringe-projection autofocus system devoid of a reference mirror. Contributions to error in determination of a target surface profile caused by air non-uniformities are measured based on multiple measurements of the target surface performed at different wavelengths, and/or angles of incidence, and/or grating pitches and subtracted from the measured profile, rendering the system substantially insensitive to presence of air turbulence. Same optical beams forming a fringe irradiance pattern on target surface are used for measurement of the surface profile and reduction of measurement error by the amount attributed to air turbulence.

Claim (Index 1):
An apparatus configured to detect a position of a surface of a substrate, the apparatus comprising:\n a substrate stage configured to support the workpiece, the substrate stage including a flat portion and a workpiece-holding portion; a source system, is configured and dimensioned to generate\n a first beam of light having a first wavelength directed to the surface through the source system, and \n a second beam of light having a second wavelength directed to the surface through the source system, wherein the first and second wavelengths differ from one another \n to form, at the surface, an irradiation pattern that includes light from the first and second beams of light;\n a light-receiving system including an optical detector, the light-receiving system configured to receive light from said irradiation pattern reflected at the surface and to form an image of the irradiation pattern at an optical detector of the apparatus; \n and\n electronic circuitry configured to determine a position of the surface from comparing first and second detection signals,\n wherein the first detection signal is an electronic signal generated by the optical detector in response to detecting light from a first portion of the irradiation pattern that has been formed at the flat portion, \n wherein the second detection signal is an electronic signal generated by the optical detector in response to detecting light from a second portion of the irradiation pattern that has been formed at the workpiece-holding portion.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 91.0
- Lexical Diversity: 1.62712
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14480810', '13801961', '13794353', '13793507', '14593190']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6928302006811922
- 35 USC 102 Novelty (BERT): 0.4811309017006214
- Combined Prediction Score: 0.6716602707831352
- Mean Citation Score: 187.3763
- Max Citation Score: 272.21752999999995
- Similarity Product: 234.42052253494973

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