PATENT CLAIM ANALYSIS

Application Number: 15912633
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-07
Patent Classification: ["372", "057000"]

Abstract:
A narrow band excimer laser apparatus includes a line narrowing module that narrows the spectral line width of laser light, a nitrogen gas introducing unit, a first valve that restricts the flow of nitrogen gas from the introducing unit into a casing of the module, an exhaust unit that causes gas to flow out from the casing, an exhaust pump for exhausting the gas from the casing, a second valve that restricts the exhausting of gas from the exhaust unit, an atmosphere discharge unit that discharges the gas within the casing into the atmosphere, a third valve that restricts the discharge of gas into the atmosphere, and a control unit that closes the second valve while opening the first and third valves, supplies nitrogen gas into the casing, then closes the third valve while opening the first and second valves, drives the exhaust pump, and causes laser oscillation thereafter.

Claim (Index 1):
A narrow band excimer laser apparatus, comprising:\n an optical resonator; a laser chamber that contains an excimer laser gas and is disposed along an optical path of the optical resonator; a line narrowing module including a casing and a line narrowing optical element housed in the casing, the line narrowing module being provided in the optical resonator and being configured to narrow a spectral line width of laser light which is output from the laser chamber; a nitrogen gas supply apparatus; a nitrogen gas introducing unit configured to cause nitrogen gas supplied from the nitrogen gas supply apparatus to flow into the casing; a first valve configured to control inflow of nitrogen gas from the nitrogen gas introducing unit into the casing; an exhaust unit configured to cause gas within the casing to flow outside the casing; an exhaust pump configured to cause gas within the casing to be exhausted outside the casing through the exhaust unit; a second valve configured to control exhausting of gas from the exhaust unit; an atmosphere discharging unit configured to discharge gas within the casing to the atmosphere; a third valve configured to control discharging of gas by the atmosphere discharging unit; and a control unit configured to close the second valve while opening the first valve and the third valve to supply nitrogen gas into the casing for a predetermined amount of time, then to close the first valve and the third valve while opening the second valve and driving the exhaust pump to exhaust the interior of the casing, and to cause laser oscillation thereafter.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 90.0
- Lexical Diversity: 2.89286
- Patent Class: 372.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14487796', '15486323', '10035351', '13656917', '10338779']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7896954606120345
- 35 USC 102 Novelty (BERT): 0.497838057721555
- Combined Prediction Score: 0.7605097203229866
- Mean Citation Score: 236.498262
- Max Citation Score: 244.42015
- Similarity Product: 184.5328706488013

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

Dataset: test