PATENT CLAIM ANALYSIS

Application Number: 15977043
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["438", "714000"]

Abstract:
An etching method performed by an etching apparatus includes a first process of causing a first high-frequency power supply to output a first high-frequency power with a first frequency and causing a second high-frequency power supply to output a second high-frequency power with a second frequency lower than the first frequency in a cryogenic environment where the temperature of a wafer is −35° C. or lower, to generate plasma from a hydrogen-containing gas and a fluorine-containing gas and to etch, with the plasma, a multi-layer film of silicon dioxide and silicon nitride and a single-layer film of silicon dioxide that are formed on the wafer; and a second process of stopping the output of the second high-frequency power supply. The first process and the second process are repeated multiple times, and the first process is shorter in time than the second process.

Claim (Index 18):
An etching method performed by an etching apparatus, the etching method comprising:\n placing, on a mount table of the etching apparatus, a wafer that includes a multi-layer film including a first silicon-containing film and a second silicon-containing film different from the first silicon-containing film and a single-layer film including the first silicon-containing film; setting a temperature of the wafer at \u221235\u00b0 C. or lower; supplying, by a first radio-frequency power supply of the etching apparatus, a first radio-frequency power with a first frequency to generate plasma from a hydrogen-containing gas and a fluorine-containing gas; applying a second radio-frequency power with a second frequency lower than the first frequency to the mount table by a second radio-frequency power supply of the etching apparatus, at least one of the first radio-frequency power and the second radio-frequency power being a pulse wave; and controlling a duty ratio of the pulse wave.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 93.0
- Lexical Diversity: 2.40323
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15375405', '14779670', '15361675', '15131221', '14977756']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8355160599078506
- 35 USC 102 Novelty (BERT): 0.5095709256107901
- Combined Prediction Score: 0.8029215464781446
- Mean Citation Score: 232.644146
- Max Citation Score: 295.25543
- Similarity Product: 260.693936403116

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