PATENT CLAIM ANALYSIS

Application Number: 16054251
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2018-12
Patent Classification: ["355", "027000"]

Abstract:
An exposure apparatus exposes a substrate with illumination light via a projection optical system, and includes a stage disposed below the projection optical system and holds the substrate; an encoder system in which one of a grating section and a head is provided at the stage and the other of the grating section and the head is provided at a frame member disposed above the stage, on a lower end side of the projection optical system, and which irradiates the grating section with a measurement beam via the head and measures positional information of the stage with a plurality of the heads that face the grating section; and a controller coupled to the encoder system, that controls a drive system based on positional information measured with the encoder system while compensating for measurement error of the encoder system related to measurement direction of the positional information by the heads.

Claim (Index 1):
An exposure apparatus that exposes a substrate with an illumination light via a projection optical system and a liquid, the apparatus comprising:\n a frame member that supports the projection optical system; a first detection system provided at the frame member, spaced apart from the projection optical system on one side in a first direction within a predetermined plane that is orthogonal to an optical axis of the projection optical system, the first detection system detecting a mark of the substrate; a first stage system having a first stage and a first drive system, the first stage being disposed above the projection optical system and holding a mask illuminated with the illumination light, and the first drive system including a first motor to drive the first stage; a liquid immersion member provided to surround a lens that is disposed closest to an image plane side, of a plurality of optical elements of the projection optical system, the liquid immersion member having a lower surface to which the substrate is placed facing, and locally forming a liquid immersion area with the liquid under the lens; a base member disposed below the liquid immersion member; a second stage system having a second stage and a third stage that are disposed on the base member and a second drive system that includes a second motor to drive the second and the third stages, the second stage having a holder to hold the substrate; a measurement system having a first encoder system that measures positional information of the first stage and a second encoder system that measures positional information of the second and the third stages, in the second encoder system one of a grating section and heads being provided at the second stage and the other of the grating section and the heads being provided at the frame member so that the other of the grating section and the heads is disposed on an outer side of the liquid immersion member with respect to the projection optical system, the second encoder system measuring the positional information of the second stage with a plurality of the heads that face the grating section, and the grating section having a reflective grating that is periodic in a direction parallel to the predetermined plane; and a controller coupled to the first and the second stage systems and the measurement system, wherein the controller controls the second drive system so that the second stage is moved under the first detection system in order to detect the mark of the substrate by the first detection systems the second stage is moved from the one side to the other side in the first direction in order to cause the second stage to come close to the third stage placed facing the projection optical system, and the second and the third stages that have come close together are moved from the one side to the other side in the first direction with respect to the liquid immersion member in order to place the second stage to face the projection optical system instead of the third stage while substantially maintaining the liquid immersion area under the lens, the substrate being placed to face the lower surface of the liquid immersion member by the second stage that is placed to face the projection optical system instead of the third stage, the controller controls the second drive system so that the second stage is moved from the one side to the other side in the first direction with respect to the liquid immersion member while maintaining the liquid immersion area between the second stage and the lens in order to perform exposure via the projection optical system and the liquid of the liquid immersion area, from an area located on the one side in the first direction, of a plurality of areas on the substrate that is placed facing the lower surface of the liquid immersion member in an exposure operation of the substrate, and the controller controls the first and the second drive systems based on detection information of the first detection system, measurement information of the first and the second encoder systems and correction information for compensating for a measurement error of the second encoder system related to a measurement direction of the positional information by the heads so that, in the exposure operation, alignment between the mask and the substrate is performed and scanning exposure in which the mask and the substrate are each moved relative to the illumination light is performed with the first direction serving as a scanning direction and also the measurement error is compensated, the measurement error occurring due to a relative motion between the heads and the grating section in a direction different from the measurement direction.

Metadata:
- Claim Count in Document: 74.0
- Percentile: 96.0
- Lexical Diversity: 2.32836
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15382825', '15384489', '14570669', '14478801', '15946030']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7308866319682678
- 35 USC 102 Novelty (BERT): 0.5517877287644815
- Combined Prediction Score: 0.7129767416478892
- Mean Citation Score: 422.118376
- Max Citation Score: 429.70844000000005
- Similarity Product: 420.4628992715837

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