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 10):
The method of manufacturing a silicon carbide semiconductor device according to  claim 4 ,\n wherein the formation of the gate insulating film includes performing wet oxidation of the semiconductor substrate using water vapor as an oxidant, and subsequently thermally oxidizing the semiconductor substrate in an oxynitride atmosphere including nitrogen monoxide or nitrous oxide.

Metadata:
- Claim Count in Document: 38.0
- Percentile: 90.0
- Lexical Diversity: 1.98438
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['14778058', '10494616', '14960285', '15691107', '11991249']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9283970850903536
- 35 USC 102 Novelty (BERT): 0.5030056202767307
- Combined Prediction Score: 0.8858579386089914
- Mean Citation Score: 250.899142
- Max Citation Score: 284.2237
- Similarity Product: 236.0928479475141

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