PATENT CLAIM ANALYSIS

Application Number: 15993708
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["257", "330000"]

Abstract:
On a front surface of a semiconductor base, a first n − -type drift region and a second n-type drift region are provided. A gate trench is provided that penetrates an n + -type source region and p-type base region, and reaches the second n-type drift region. Between adjacent gate trenches, a contact trench is provided that penetrates the n + -type source region and the p-type base region, and reaches a p-type semiconductor region, through the second n-type drift region. A source electrode embedded in the contact trench is in contact with the p-type semiconductor region at a bottom and corners of the contact trench, and forms a Schottky junction with the second n-type drift region at side walls of the contact trench. A depth of the contact trench is a depth by which a mathematical area of a part thereof forming the Schottky junction is a predetermined mathematical area or greater.

Claim (Index 1):
A semiconductor device, comprising:\n a first silicon carbide semiconductor layer of a first conductivity type; a second silicon carbide semiconductor layer of the first conductivity type provided on a surface of the first silicon carbide semiconductor layer and having an impurity concentration that is lower than that of the first silicon carbide semiconductor layer; a first semiconductor region of a second conductivity type selectively provided in the second silicon carbide semiconductor layer, at a position deeper than that of a surface of the second silicon carbide semiconductor layer; a third silicon carbide semiconductor layer of the second conductivity type provided on the surface of the second silicon carbide semiconductor layer; a second semiconductor region of the first conductivity type selectively provided in the third silicon carbide semiconductor layer; a first trench that penetrates the second semiconductor region and the third silicon carbide semiconductor layer, and reaches the second silicon carbide semiconductor layer; a second trench provided separated from the first trench, the second trench penetrating the second semiconductor region and the third silicon carbide semiconductor layer, and reaching the first semiconductor region, through the second silicon carbide semiconductor layer; a gate insulating film provided in the first trench; a gate electrode provided in the first trench on the gate insulating film; and a metal electrode in contact with the second semiconductor region and the third silicon carbide semiconductor layer, the metal electrode being embedded in the second trench so as to be in contact with the first semiconductor region at a bottom and corners of the second trench, the metal electrode forming a Schottky junction with the second silicon carbide semiconductor layer at a side wall of the second trench, wherein the second trench has a depth that is a depth by which a mathematical area of the metal electrode forming the Schottky junction is at least a predetermined mathematical area.

Metadata:
- Claim Count in Document: 6.0
- Percentile: 93.0
- Lexical Diversity: 2.73333
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15841461', '15252623', '15846040', '15943696', '15988764']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9326819858024206
- 35 USC 102 Novelty (BERT): 0.5448880419936014
- Combined Prediction Score: 0.8939025914215386
- Mean Citation Score: 359.8348180000001
- Max Citation Score: 403.44516
- Similarity Product: 358.4082069931984

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

Dataset: test