PATENT CLAIM ANALYSIS

Application Number: 16090015
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-04
Patent Classification: ["355", "071000"]

Abstract:
A coaxial reticle alignment device, a lithography apparatus and alignment methods are disclosed. The coaxial reticle alignment device includes: illumination modules (A, B), each configured to provide an alignment light beam; a projection objective ( 8 ) under a reticle ( 5 ); a reference plate ( 9 ) on a workpiece stage ( 12 ), configured to carry a reference mark ( 10 ); and an image detection and processing module ( 11 ) under the reference plate ( 9 ). The reference mark ( 10 ) is located within a FOV of the image detection and processing module ( 11 ), and during movement of the workpiece stage ( 12 ), the image detection and processing module ( 11 ) receives the alignment light beam having passed sequentially through the reticle alignment mark ( 6, 7 ), the projection objective ( 8 ) and the reference mark ( 10 ), it captures images of the reticle alignment mark ( 6, 7 ) and the reference mark ( 10 ) which are processed to derive relative positional information between the reticle alignment mark ( 6, 7 ) and the reference mark ( 10 ) that enables the alignment of the reticle ( 5 ) with the workpiece stage ( 12 ). The coaxial reticle alignment device adopts dedicated separate illumination means, has a simple structure, allows easy operation and improves alignment efficiency.

Claim (Index 3):
The coaxial reticle alignment device according to  claim 2 , wherein during movement of the image detection and processing module with the workpiece stage relative to the reticle, the image detection and processing module successively receives alignment light beams that have passed through the projection objective to obtain relative positional information between each of the reticle alignment marks and the reference mark.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 97.0
- Lexical Diversity: 2.84444
- Patent Class: 355.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11132260', '16089956', '10279924', '14002917', '10998596']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7031851627742042
- 35 USC 102 Novelty (BERT): 0.4883950376346762
- Combined Prediction Score: 0.6817061502602514
- Mean Citation Score: 253.42859
- Max Citation Score: 261.96512
- Similarity Product: 215.8997002650452

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