PATENT CLAIM ANALYSIS

Application Number: 15749621
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-02
Patent Classification: ["257", "077000"]

Abstract:
A silicon carbide epitaxial substrate includes a silicon carbide single-crystal substrate of one conductivity type, a first silicon carbide layer of the above-mentioned one conductivity type, a second silicon carbide layer of the above-mentioned one conductivity type, and a third silicon carbide layer of the above-mentioned one conductivity type. The silicon carbide single-crystal substrate has first impurity concentration. The first silicon carbide layer is provided on the silicon carbide single-crystal substrate, and has second impurity concentration that is lower than the first impurity concentration. The second silicon carbide layer is provided on the first silicon carbide layer, and has third impurity concentration that is higher than the first impurity concentration. The third silicon carbide layer is provided on the second silicon carbide layer, and has fourth impurity concentration that is lower than the second impurity concentration.

Claim (Index 8):
A silicon carbide semiconductor device comprising:\n a silicon carbide single-crystal substrate of one conductivity type having first impurity concentration; a first silicon carbide layer of the one conductivity type being provided on the silicon carbide single-crystal substrate, and having second impurity concentration that is lower than the first impurity concentration; a second silicon carbide layer of the one conductivity type being provided on the first silicon carbide layer, and having third impurity concentration that is higher than the first impurity concentration; a third silicon carbide layer of the one conductivity type being provided on the second silicon carbide layer, and having fourth impurity concentration that is lower than the second impurity concentration; and a fourth silicon carbide layer of a conductivity type different from the one conductivity type provided on the third silicon carbide layer.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 88.0
- Lexical Diversity: 4.45455
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15827510', '12453985', '11168174', '14418897', '13863043']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9302817255407304
- 35 USC 102 Novelty (BERT): 0.5305660528115196
- Combined Prediction Score: 0.8903101582678093
- Mean Citation Score: 332.735454
- Max Citation Score: 367.47125
- Similarity Product: 297.102758654505

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