PATENT CLAIM ANALYSIS

Application Number: 15984266
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["355", "052000"]

Abstract:
An apparatus and method for measuring thermo-mechanically induced reticle distortion or other distortion in a lithography device enables detecting distortion at the nanometer level in situ. The techniques described use relatively simple optical detectors and data acquisition electronics that are capable of monitoring the distortion in real time, during operation of the lithography equipment. Time-varying anisotropic distortion of a reticle can be measured by directing slit patterns of light having different orientations to the reticle and detecting reflected, transmitted or diffracted light from the reticle. In one example, corresponding segments of successive time measurements of secondary light signals are compared as the reticle scans a substrate at a reticle stage speed of about 1 m/s to detect temporal offsets and other features that correspond to spatial distortion.

Claim (Index 5):
A lithographic method, comprising:\n detecting a reticle pattern distortion with the apparatus of  claim 1 ; and adjusting at least one lithographic system parameter based on the detected reticle pattern distortion.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 93.0
- Lexical Diversity: 1.52273
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14634290', '15230246', '13277085', '15204389', '10851851']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7233955769780951
- 35 USC 102 Novelty (BERT): 0.505888292579965
- Combined Prediction Score: 0.701644848538282
- Mean Citation Score: 283.375916
- Max Citation Score: 343.8318
- Similarity Product: 324.2203801217079

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