PATENT CLAIM ANALYSIS

Application Number: 16068811
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-02
Patent Classification: ["438", "753000"]

Abstract:
The present invention relates to a wet etching composition for a substrate having a SiN layer and a Si layer, comprising 0.1-50 mass % fluorine compound (A), 0.04-10 mass % oxidant (B) and water (D) and having pH in a range of 2.0-5.0. The present invention also relates to a wet etching process for a semiconductor substrate having a SiN layer and a Si layer, the process using the wet etching composition. The composition of the present invention can be used for a substrate having a SiN layer and a Si layer to enhance removal selectivity of Si over SiN while reducing corrosion of the device and the exhaust line and air pollution caused by a volatile component generated upon use and further a burden on the environment caused by the nitrogen content contained in the composition.

Claim (Index 6):
A process of producing a semiconductor element, the process comprising:\n selectively removing a Si layer by using the wet etching composition according to  claim 1  on a substrate having a SiN layer and the Si layer.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 95.0
- Lexical Diversity: 2.09859
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14978383', '14783370', '14240931', '12857959', '12461319']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8453099254561727
- 35 USC 102 Novelty (BERT): 0.48610658693587
- Combined Prediction Score: 0.8093895916041425
- Mean Citation Score: 161.27915000000004
- Max Citation Score: 166.31717
- Similarity Product: 109.24267395640136

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