PATENT CLAIM ANALYSIS

Application Number: 15921276
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["257", "077000"]

Abstract:
A semiconductor device includes an n − -type drift layer of an formed on an n + -type SiC substrate; a p-type layer provided on a surface opposite that facing the n + -type SiC substrate; and an n-type buffer layer provided, as a recombination promoting layer, between the n − -type drift layer and the n + -type SiC substrate, the n-type buffer layer having an impurity concentration higher than that of the n − -type drift layer. In the buffer layer, as a recombination site, a defect energy-level is introduced at a high concentration of 1×10 12 /cm 3  or higher. The buffer layer promotes internal electron-hole recombination and without applying high energy to BPDs at an interface of the buffer layer and the SiC substrate, may reduce the amount of recombination near the interface even at a current density equivalent to that of a conventional structure and thereby, prevents characteristics degradation at the time of operation.

Claim (Index 4):
The method according to  claim 3 , further comprising:\n introducing a defect energy-level by carbon loss in entire area of each of the third semiconductor region and the high-resistance first semiconductor region thereby introducing a carbon vacancy defect in the third semiconductor region and the high-resistance first semiconductor region; and reducing the carbon vacancy defects only at an upper region of the third semiconductor region with respect to the substrate.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 90.0
- Lexical Diversity: 2.19231
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15293222', '15712644', '12097019', '15246595', '15638012']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9200314978692596
- 35 USC 102 Novelty (BERT): 0.5005232437941423
- Combined Prediction Score: 0.8780806724617479
- Mean Citation Score: 244.189748
- Max Citation Score: 255.94547000000003
- Similarity Product: 183.079936495424

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

Dataset: test