PATENT CLAIM ANALYSIS

Application Number: 16118982
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-03
Patent Classification: ["438", "703000"]

Abstract:
An etching method can protect a mask with a material having higher etching resistance to a silicon-containing film. The etching method is performed in a state that a processing target object is placed within a chamber main body. The etching method includes forming a tungsten film on the processing target object and etching the silicon-containing film of the processing target object. The forming of the tungsten film includes supplying a gaseous tungsten-containing precursor onto the processing target object; and generating plasma of a hydrogen gas to supply active species of hydrogen to the precursor on the processing target object. In the etching of the silicon-containing film, plasma of a processing gas containing fluorine, hydrogen and carbon is generated within the chamber main body.

Claim (Index 16):
An etching method of etching a silicon-containing film having a single silicon oxide film or having multiple silicon oxide films and multiple silicon nitride films alternately stacked on top of each other,\n wherein the etching method is performed in a state that a workpiece having the silicon-containing film is placed within a chamber main body of a plasma processing apparatus, the workpiece further includes a mask provided on the silicon-containing film, and the mask contains carbon and includes an opening, wherein the etching method comprises: forming a tungsten film on the workpiece; and etching the silicon-containing film, wherein the forming of the tungsten film and the etching of the silicon-containing film are repeated alternately, each of the forming of the tungsten film and the etching of the silicon-containing film includes setting a temperature of the workpiece to be equal to or less than 0\u00b0 C., the forming of the tungsten film comprises: supplying a gaseous tungsten-containing precursor onto the workpiece to form the tungsten-containing precursor on the workpiece; and generating plasma from a hydrogen-containing gas to supply hydrogen active species to the gaseous precursor on the workpiece, wherein the supplying of the gaseous precursor and the generating of the plasma from the hydrogen-containing gas are repeated alternately in the forming of the tungsten film, the gaseous precursor is a halogenated tungsten gas, and in the etching of the silicon-containing film, plasma is generated from a processing gas containing fluorine, hydrogen, and carbon within the chamber main body to etch the silicon-containing film.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 96.0
- Lexical Diversity: 2.33929
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16118672', '15007420', '16315812', '15702898', '15686285']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8789280520663368
- 35 USC 102 Novelty (BERT): 0.4988675732316874
- Combined Prediction Score: 0.8409220041828719
- Mean Citation Score: 251.40974
- Max Citation Score: 278.60333
- Similarity Product: 240.9633206966376

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