PATENT CLAIM ANALYSIS

Application Number: 15915979
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["257", "077000"]

Abstract:
Provided is a MOS gate using a thermally oxidized film as a gate insulating film on the front surface of a silicon carbide substrate. A ratio of an excess carbon amount at an SiO 2 /SiC interface in relation to a carbon amount in the silicon carbide substrate is 0.1 or less. The excess carbon at the SiO 2 /SiC interface is generated during thermal oxidation for forming the gate insulating film. The excess carbon is a compound constituted of carbon atoms having the pi (it) bonds, and specifically is graphite, for example. The amount of nitrogen at the SiO 2 /SiC interface is 1.4×10 15 /cm 2  to 1.8×10 15 /cm 2 , inclusive, for example.

Claim (Index 3):
A silicon carbide semiconductor device, comprising:\n a semiconductor substrate made of silicon carbide; a gate insulating film in contact with the semiconductor substrate on one main surface of the semiconductor substrate; and a gate electrode that is provided along the gate insulating film, and that opposes the semiconductor substrate with the gate insulating film sandwiched therebetween, wherein the gate insulating film is a thermally oxidized film, wherein nitrogen and excess carbon made of carbon atoms having the pi (n) bonds are present at an interface between the gate insulating film and the semiconductor substrate, and wherein an amount of the nitrogen at the interface between the gate insulating film and the semiconductor substrate is 1.4\u00d710 15 /cm 2  to 1.8\u00d710 15 /cm 2 , inclusive.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 90.0
- Lexical Diversity: 1.98438
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14778058', '10494616', '14960285', '15691107', '11991249']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9197761794542596
- 35 USC 102 Novelty (BERT): 0.50643448241683
- Combined Prediction Score: 0.8784420097505168
- Mean Citation Score: 250.899142
- Max Citation Score: 284.2237
- Similarity Product: 212.19896702066063

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