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 6):
The semiconductor device according to  claim 1 , wherein an impurity concentration of the first base region and an impurity concentration of the second base region are the same.

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): 0.9250220744329396
- 35 USC 102 Novelty (BERT): 0.5189468112935415
- Combined Prediction Score: 0.8844145481189997
- Mean Citation Score: 315.517526
- Max Citation Score: 323.4997
- Similarity Product: 309.0328531812072

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