PATENT CLAIM ANALYSIS

Application Number: 15961013
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-12
Patent Classification: ["257", "330000"]

Abstract:
On a surface of an n-type silicon carbide epitaxial layer on an n + -type silicon carbide substrate, first and second p + -type base regions are formed in the n-type silicon carbide epitaxial layer, an n-type region is formed in the n-type silicon carbide epitaxial layer, a p-type base layer is formed on the n-type region, an n + -type source region and a p ++ -type contact region are formed in the p-type base layer, and a trench is formed to a position shallower than the second p + -type base region and penetrates the p-type base layer. A first sidewall angle of the trench at a position of the p-type base layer is 80° to 90° with respect to a main surface. A difference of the first sidewall angle and a second sidewall angle of the trench at a position deeper than a boundary of the p-type base layer and the n-type region is 1° to 25°.

Claim (Index 2):
The semiconductor device according to  claim 1 , wherein the first wide bandgap semiconductor layer includes a first conductivity type region at the first side thereof, the first conductivity type region facing the second side of the second wide bandgap semiconductor layer and having an impurity concentration higher than the impurity concentration of the first wide bandgap semiconductor layer, wherein\n the first base region and the second base region are disposed in the first conductivity type region.

Metadata:
- Claim Count in Document: 32.0
- Percentile: 91.0
- Lexical Diversity: 3.16981
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15909977', '15854540', '15716919', '15291322', '15691223']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9249757685697358
- 35 USC 102 Novelty (BERT): 0.5215811178055666
- Combined Prediction Score: 0.8846363034933189
- Mean Citation Score: 315.517526
- Max Citation Score: 323.4997
- Similarity Product: 286.3372610227108

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

Dataset: test