PATENT CLAIM ANALYSIS

Application Number: 15964031
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-10
Patent Classification: ["438", "699000"]

Abstract:
The present invention provides a method for fabricating a hard mask, comprising: firstly, a first material layer and a second material layer are provided on the first material layer, a cell region and a peripheral region are defined thereon, and then a plurality of sacrificial patterns and a plurality of spacers are formed in the cell region on the second material layer, each two spacers are located at two sides of each of the sacrificial patterns. Afterwards, a first etching step is performed to remove the sacrificial patterns, a second etching step is performed to remove a portion of the second material layer and expose a portion of the first material layer within the cell region, and a third etching step is performed to remove portions of the first material layer, so as to forma plurality of first recesses in the first material layer.

Claim (Index 1):
A method for fabricating a hard mask, comprising:\n providing a first material layer and a second material layer disposed on the first material layer, a cell region and a peripheral region are defined thereon, wherein the material of the first material layer comprises silicon nitride, and the material of the second material layer comprises SiON; forming a plurality of sacrificial patterns and a plurality of spacers in the cell region on the second material layer, each two spacers are located at two sides of each of the sacrificial patterns, wherein the material of the sacrificial patterns does not comprises SiON; performing a first etching step, to remove the plurality of sacrificial patterns, wherein the first etching step is a reactive ion etching; performing a second etching step, to remove a portion of the second material layer and to expose a portion of the first material layer within the cell region, wherein the second etching step is a reactive ion etching; and performing a third etching step, to remove portions of the first material layer, so as to form a plurality of first recesses in the first material layer.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 91.0
- Lexical Diversity: 2.68966
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12058512', '15851149', '14743594', '15643940', '15909036']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8200048638598646
- 35 USC 102 Novelty (BERT): 0.4734170085278295
- Combined Prediction Score: 0.7853460783266611
- Mean Citation Score: 155.17575600000004
- Max Citation Score: 156.32326
- Similarity Product: 118.95812123815418

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

Dataset: test