PATENT CLAIM ANALYSIS

Application Number: 15906862
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-02
Patent Classification: ["438", "705000"]

Abstract:
In an etching method of etching a tungsten film, the method is provided to execute a generating a surface reaction layer on a tungsten film that is formed on a surface of a base material by supplying a reactive species including fluorine which is generated in plasma onto the base material for a first predetermined time in a state where the base material of which the tungsten film is formed on at least a portion of the surface is cooled to a melting point temperature or lower of a tungsten fluoride, and a removing the surface reaction layer that is generated on the tungsten film by heating the base material of which the surface reaction layer is generated on the tungsten film to a boiling point temperature or higher of the tungsten fluoride for a second predetermined time.

Claim (Index 14):
An etching apparatus which etches a tungsten film, comprising:\n a treatment chamber; a stage unit which is disposed on an inside of the treatment chamber and on which a treated body is placed; a cooling unit for cooling the stage unit; a gas supply unit that supplies a gas including fluorine to the inside of the treatment chamber; a plasma source that excites the gas supplied from the gas supply unit to generate plasma, and supplies a radical including fluorine to the inside of the treatment chamber; a vacuum exhaust system that evacuates gas of the inside of the treatment chamber; a heating unit that heats the treated body placed on the stage unit; and a controller that controls the cooling unit, the gas supply unit, the plasma source, the vacuum exhaust system, and the heating unit, wherein the controller executes a first predetermined time continued treatment in which a surface reaction layer is generated on a surface of the treated body by supplying the gas including the fluorine to the plasma source from the gas supply unit, exciting the supplied gas to generate the plasma, and supplying the radical including the fluorine to the inside of the treatment chamber, in a state where the stage unit is cooled by the cooling unit, by controlling the cooling unit, the gas supply unit, and the plasma source, and a second predetermined time continued treatment in which the treated body of which the surface reaction layer is generated on the surface is heated by the heating unit while the air of the inside of the treatment chamber is evacuated by the vacuum exhaust system, by controlling the vacuum exhaust system and the heating unit.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 88.0
- Lexical Diversity: 2.47368
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15698823', '10959501', '11211531', '12332017', '13412534']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8306310717650618
- 35 USC 102 Novelty (BERT): 0.5235791480133146
- Combined Prediction Score: 0.7999258793898871
- Mean Citation Score: 235.667456
- Max Citation Score: 309.2698
- Similarity Product: 221.08262518998384

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

Dataset: test