PATENT CLAIM ANALYSIS

Application Number: 15990000
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["438", "757000"]

Abstract:
Described herein is an etching solution comprising water, phosphoric acid solution (aqueous), and a hydroxyl group-containing solvent. Such compositions are useful for the selective removal of silicon nitride over silicon oxide from a microelectronic device having such material(s) thereon during its manufacture.

Claim (Index 13):
A method of selectively enhancing the etch rate of silicon nitride relative to silicon dioxide on a composite semiconductor device comprising silicon nitride and silicon dioxide, the method comprising the steps of:\n contacting the composite semiconductor device comprising silicon nitride and silicon dioxide with an aqueous composition comprising phosphoric acid and a hydroxyl group-containing solvent; and rinsing the composite semiconductor device after the silicon nitride is at least partially removed, wherein the selectivity of the etch for silicon nitride over silicon oxide is from about 50 to about 500.

Metadata:
- Claim Count in Document: 74.0
- Percentile: 93.0
- Lexical Diversity: 1.15909
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15386178', '12520138', '14331958', '15743529', '14880698']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8682942382303316
- 35 USC 102 Novelty (BERT): 0.5054384548145865
- Combined Prediction Score: 0.832008659888757
- Mean Citation Score: 260.935484
- Max Citation Score: 284.91214
- Similarity Product: 218.36633807086469

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