PATENT CLAIM ANALYSIS

Application Number: 16280521
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-08
Patent Classification: ["355", "055000"]

Abstract:
For determining a focus position of a lithography mask (e.g.,  5 ), a focus stack of a measurement region free of structures to be imaged is recorded and the speckle patterns of the recorded images are evaluated.

Claim (Index 20):
A method for imaging a lithography mask onto a wafer, in which the lithography mask comprises a structure to be imaged and at least one measurement region that is free of structures to be imaged, the method comprising:\n determining a focus position of the lithography mask, comprising the following steps:\n providing an optical system having an imaging optical unit for imaging lithography masks, \n recording a focus stack of the at least one measurement region of the lithography mask, \n evaluating 2D intensity distributions of the recorded focus stack in a spatially resolved manner, \n wherein evaluating the 2D intensity distributions comprises ascertaining the speckle contrast, and \n wherein evaluating the 2D intensity distributions comprises ascertaining a focus position (z) for which the speckle contrast has a minimum, \n aligning a position of the lithography mask in a projection exposure system according to the determined focus position of the lithography mask, and exposing the lithography mask to transfer the structure to be imaged onto the wafer.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 99.0
- Lexical Diversity: 1.32258
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16280494', '15410918', '16047324', '13542625', '10800110']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6947965437888959
- 35 USC 102 Novelty (BERT): 0.5426354996749145
- Combined Prediction Score: 0.6795804393774978
- Mean Citation Score: 275.94220800000005
- Max Citation Score: 448.67203
- Similarity Product: 327.55064766046644

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test