PATENT CLAIM ANALYSIS

Application Number: 16203693
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-03
Patent Classification: ["355", "030000"]

Abstract:
An apparatus and method for cleaning a contaminated surface of a lithographic apparatus are provided. A liquid confinement structure comprises at least two openings used to supply and extract liquid to a gap below the structure. The direction of flow between the openings can be switched. Liquid may be supplied to the gap radially outward of an opening adapted for dual flow. Supply and extraction lines to respectively supply liquid to and extract liquid from the liquid confinement structure have an inner surface that is resistant to corrosion by an organic liquid. A corrosive cleaning fluid can be used to clean photo resist contamination.

Claim (Index 29):
An immersion lithographic apparatus, comprising:\n a movable table; a projection system configured to project a radiation beam onto a radiation-sensitive substrate; a fluid handling structure located above the table and configured to at least partly confine an immersion liquid within a space between the projection system and the movable table, the fluid handling structure comprising a recovery opening configured to recover immersion liquid into the fluid handling structure, the recovery opening comprising a porous member through which immersion liquid is recovered; a fluid opening located outward, relative to a path of the radiation beam, of the porous member; and a control system configured to cause supply, during a cleaning operation, of a cleaning fluid of different composition than the immersion liquid out through the porous member of the recovery opening and to cause the fluid opening to exhaust fluid, such that the cleaning fluid flows in a horizontal direction between the porous member and the movable table.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 98.0
- Lexical Diversity: 1.69231
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15589674', '15935670', '15018582', '14310873', '12956934']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7549034482608509
- 35 USC 102 Novelty (BERT): 0.5225490274654778
- Combined Prediction Score: 0.7316680061813136
- Mean Citation Score: 384.017344
- Max Citation Score: 394.1659
- Similarity Product: 383.767356184876

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