PATENT CLAIM ANALYSIS

Application Number: 16056875
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2018-12
Patent Classification: ["355", "072000"]

Abstract:
Within area where of four heads installed on a wafer stage, heads included in the first head group and the second head group to which three heads each belong that include one head different from each other face the corresponding areas on a scale plate, the wafer stage is driven based on positional information which is obtained using the first head group, as well as obtain the displacement (displacement of position, rotation, and scaling) between the first and second reference coordinate systems corresponding to the first and second head groups using the positional information obtained using the first and second head groups. By using the results and correcting measurement results obtained using the second head group, the displacement between the first and second reference coordinate systems is calibrated, which allows the measurement errors that come with the displacement between areas on scale plates where each of the four heads face.

Claim (Index 1):
An exposure apparatus for exposing a substrate with illumination light via a projection optical system, the apparatus comprising:\n a metrology frame arranged for supporting the projection optical system in an exposure station in which an exposure operation of the substrate is performed via the projection optical system; a first detection system provided to the metrology frame in a measurement station different from the exposure station and configured to detect a mark of the substrate; a second detection system disposed in the measurement station and configured to detect surface information of the substrate; a base disposed below the projection optical system and the first and the second detection systems; a first stage and a second stage disposed on the base and each arranged for holding a substrate; a drive system having a planar motor and configured to move each of the first and the second stages from one of the exposure station and the measurement station to the other of the exposure station and the measurement station, the planar motor being arranged for supporting the first and the second stages by levitation on the base; a first scale member provided to the metrology frame to be disposed on a lower end side of the projection optical system in the exposure station, and having four first sections in each of which a reflective two-dimensional grating is formed; a second scale member provided to the metrology frame to be disposed on a lower end side of the first detection system in the measurement station, and having four second sections in each of which a reflective two-dimensional grating is formed; an encoder system having four heads which are provided to the first stage and each of which is arranged for irradiating the first scale member or the second scale member from below with a measurement beam, and four heads which are provided to the second stage and each of which is arranged for irradiating the first scale member or the second scale member from below with a measurement beam, the encoder system being configured to measure positional information in directions of six degrees of freedom of the first stage or the second stage that faces the projection optical system in the exposure station and also to measure positional information in the directions of six degrees of freedom of the first stage or the second stage that faces the first detection system in the measurement station; and a controller coupled to the drive system and the encoder system, and configured to control the drive system based on measurement information of the encoder system, wherein positional information of each of the first and the second stages is measured with the encoder system in the exposure operation and detection operations of the substrate by the first and the second detection systems, the controller is configured to acquire first correction information for compensating for a measurement error of the encoder system caused by a displacement among the four first sections, based on measurement information of the encoder system in a partial section of a movement area of the first and the second stages in the exposure operation, in the partial section the four heads respectively facing the four first sections in the exposure station, and detection information of the first and the second detection systems, measurement information of the encoder system in the detection operation, and the first correction information are used in the exposure operation.

Metadata:
- Claim Count in Document: 56.0
- Percentile: 96.0
- Lexical Diversity: 2.36765
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14462668', '15269030', '15628982', '15878545', '15182166']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7198162251264157
- 35 USC 102 Novelty (BERT): 0.5261854059960681
- Combined Prediction Score: 0.700453143213381
- Mean Citation Score: 371.52087200000005
- Max Citation Score: 375.409
- Similarity Product: 332.0335848643184

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