PATENT CLAIM ANALYSIS

Application Number: 15905213
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-07
Patent Classification: ["438", "702000"]

Abstract:
An etching method including: (a) providing a workpiece including a first region made of a first material and a second region made of a second material defining a recess, the first region filling the recess of the second region while covering the second region; (b) generating plasma of a first fluorocarbon gas to etch the first region until before exposing the second region; (c) generating plasma of a second fluorocarbon gas to form fluorocarbon deposits on the first region; (d) generating plasma of an inert gas to etch the first region by fluorocarbon radicals contained in the fluorocarbon deposits; and (e) repeating step (c) and step (d) one or more times until after exposing the second region. An etching rate of the first material of the first region is higher than that of the second material of the second region with respect to the second fluorocarbon gas.

Claim (Index 2):
The etching method according to  claim 1 , wherein the first material includes SiO 2 , and the second material includes SiN.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 88.0
- Lexical Diversity: 2.72581
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15184049', '14995269', '14995392', '16069944', '15202356']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8849993555729282
- 35 USC 102 Novelty (BERT): 0.5170371497804391
- Combined Prediction Score: 0.8482031349936793
- Mean Citation Score: 284.643954
- Max Citation Score: 308.43112
- Similarity Product: 224.30108420050624

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