PATENT CLAIM ANALYSIS

Application Number: 15963698
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["257", "077000"]

Abstract:
The SiC-IGBT includes a p-type collector layer, an n − -type voltage-blocking-layer provided on the collector layer, p-type base regions provided on the n − -type voltage-blocking-layer, n + -type emitter regions provided in an upper portion of the p-type base region, a gate insulating film provided in an upper portion of the voltage-blocking-layer, and a gate electrode provided on the gate insulating film. The p-type buffer layer has thickness of five micrometers or more and  20  micrometers or less and is doped with Al at impurity concentration of 5×10 17  cm −3  or more and 5×10 18  cm −3  or less and doped with B at impurity concentration of 2×10 16  cm −3  or more and less than 5×10 17  cm −3 .

Claim (Index 1):
A silicon carbide insulated gate bipolar transistor comprising:\n a p-type collector layer being silicon carbide, the collector layer having thickness of five micrometers or more and 20 micrometers or less, the collector layer being doped with aluminum at impurity concentration of 5\u00d710 17  cm \u22123  or more and 5\u00d710 18  cm \u22123  or less, and being doped with boron at impurity concentration of 2\u00d710 16  cm \u22123  or more and less than 5\u00d710 17  cm \u22123 ; an n-type voltage-blocking-layer being provided on the collector layer; a p-type base region being provided on the voltage-blocking-layer; an n-type emitter region being provided in an upper portion of the base region; a gate insulating film being provided in an upper portion of the voltage-blocking-layer; and a gate electrode being provided on the gate insulating film, wherein the boron doped into the collector layer enhances capturing and extinction of electrons as a minority-carrier.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 91.0
- Lexical Diversity: 2.32143
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15712644', '12556870', '11132355', '13613858', '11857037']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9228969325385752
- 35 USC 102 Novelty (BERT): 0.5280411318251563
- Combined Prediction Score: 0.8834113524672335
- Mean Citation Score: 286.2476319999999
- Max Citation Score: 358.01254
- Similarity Product: 264.1331170790315

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