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 20):
The etching method as claimed in  claim 19 , wherein\n both of the first radio-frequency power and the second radio-frequency power are pulse waves; and the duty ratio of the first radio-frequency power is the same as the duty ratio of the second radio-frequency power.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 93.0
- Lexical Diversity: 2.40323
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15375405', '14779670', '15361675', '15131221', '14977756']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8503631447386997
- 35 USC 102 Novelty (BERT): 0.5223012858575431
- Combined Prediction Score: 0.817556958850584
- Mean Citation Score: 232.644146
- Max Citation Score: 295.25543
- Similarity Product: 208.90465018021465

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