PATENT CLAIM ANALYSIS

Application Number: 16069757
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-03
Patent Classification: ["216", "067000"]

Abstract:
A method of selectively etching a first region R 1  made of silicon oxide with respect to a second region R 2  made of silicon nitride by performing a plasma processing upon a processing target object is provided. The processing target object has the second region R 2  forming a recess; the first region R 1  configured to fill the recess; and a mask MK provided on the first region R 1 . The method includes a first process of generating plasma of a processing gas containing a fluorocarbon gas, and a second process of etching the first region with radicals of fluorocarbon contained in a deposit. In the second process, a high frequency power contributing to the generating of the plasma is applied in a pulse shape, and these processes are repeated.

Claim (Index 7):
An etching method of selectively etching a first region made of a first silicon-containing material with respect to a second region made of a second material different from the first silicon-containing material through a plasma processing upon a processing target object, the processing target object having the second region forming a recess; the first region configured to fill the recess and cover the second region; and a mask provided on the first region, and the mask being provided with, above the recess, an opening having a width larger than a width of the recess, the etching method comprising:\n a first sequence including a first process of forming a deposit containing fluorocarbon on the processing target object by generating, while applying a high frequency power, plasma from a processing gas containing a fluorocarbon gas within a processing vessel in which the processing target object is accommodated and a second process of etching the first region with fluorocarbon radicals contained in the deposit by generating plasma, and a second sequence including the first process and the second process, wherein the first sequence is performed at a timing when the second region is exposed, in the second process, the plasma is generated by applying a high frequency power in a pulse shape, and in the first sequence and the second sequence, the first process and the second process are repeated.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 95.0
- Lexical Diversity: 2.20312
- Patent Class: 216.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14995269', '14995552', '15527360', '14995392', '15184049']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.796175593357684
- 35 USC 102 Novelty (BERT): 0.5097868611700647
- Combined Prediction Score: 0.767536720138922
- Mean Citation Score: 320.627042
- Max Citation Score: 332.36383
- Similarity Product: 309.0641516680551

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

Dataset: test