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 19):
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, in the first sequence and the second sequence, the first process and the second process are repeated, and in the second process, sputtered first silicon-containing material is released to an outside of the recess formed by the etching in an OFF period during which the high frequency power in the pulse shape is not applied, and is suppressed from re-adhering thereto.

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