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 12):
The etching method according to  claim 11 , wherein the ratio of the number of fluorine atoms to the number of carbon atoms is higher in the first fluorocarbon gas than in the second fluorocarbon gas.

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): 0.8848578318524286
- 35 USC 102 Novelty (BERT): 0.5198057196607923
- Combined Prediction Score: 0.848352620633265
- Mean Citation Score: 284.643954
- Max Citation Score: 308.43112
- Similarity Product: 206.9631471693945

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