PATENT CLAIM ANALYSIS

Application Number: 15989399
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["257", "077000"]

Abstract:
A semiconductor device includes an n-type silicon carbide epitaxial layer formed on an n + -type silicon carbide semiconductor substrate, p + -type base regions formed in the n-type silicon carbide epitaxial layer, a dense n-type region formed in the n-type silicon carbide epitaxial layer, a p-type base layer formed on the dense n-type region, an n + -type source region and a p ++ -type contact region formed in the p-type base layer, a trench penetrating the p-type base layer in a depth direction of a part of one of the p + -type base regions, and a gate electrode formed on a gate insulating film in the trench. The n + -type source region is formed using two dopant types, phosphorus and carbon. A dose amount D C  of carbon satisfies 0.7≤D C /D p ≤1.3 with respect to a dose amount D p  of phosphorus. An impurity concentration of the n + -type source region ranges from 10 18  to 10 21 .

Claim (Index 2):
The semiconductor device according to  claim 1 , further comprising a first-conductivity-type region of the first conductivity type formed between the first silicon carbide semiconductor layer and the second silicon carbide semiconductor layer, the first-conductivity-type region having an impurity concentration that is higher than that of the first silicon carbide semiconductor layer,\n wherein the first base region has a lower end which is in the first-conductivity-type region and the trench has a lower end which is in the first-conductivity-type region.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 93.0
- Lexical Diversity: 2.55072
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15846075', '15909977', '15854540', '15716919', '15724188']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9333438508449738
- 35 USC 102 Novelty (BERT): 0.5249552175833472
- Combined Prediction Score: 0.8925049875188112
- Mean Citation Score: 348.81388400000014
- Max Citation Score: 352.59744
- Similarity Product: 285.13444087223047

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