PATENT CLAIM ANALYSIS

Application Number: 15961234
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-01
Patent Classification: ["257", "606000"]

Abstract:
A p + -type anode region that forms a contact of an anode electrode on a front surface of a semiconductor substrate and a p + -type starting substrate of a rear surface of the semiconductor substrate is formed on the front surface of the semiconductor substrate, whereby an up-anode type vertical diode is configured. The semiconductor substrate has a p − -type epitaxial layer stacked on the p + -type starting substrate, and a p-type transition layer in a surface layer of the p − -type epitaxial layer, facing the p + -type starting substrate. A p-type anode diffusion region is provided between a p + -type surface anode region and the p-type transition layer, and contacts the p + -type surface anode region and the p-type transition layer. A p-type impurity concentration of the p-type anode diffusion region decreases from an interface with the p + -type surface anode region toward an interface with the p-type transition layer.

Claim (Index 1):
A semiconductor device, comprising:\n a first semiconductor layer of a first conductivity type; a second semiconductor layer of the first conductivity type having a first surface and a second surface opposite to the first surface, and being provided on the first semiconductor layer, the first surface of the second semiconductor layer facing the first semiconductor layer, the second semiconductor layer having an impurity concentration lower than an impurity concentration of the first semiconductor layer; a first semiconductor region of the first conductivity type provided in the first surface of the second semiconductor layer, and being in contact with the first semiconductor layer, the first semiconductor region having an impurity concentration lower than the impurity concentration of the first semiconductor layer and higher than the impurity concentration of the second semiconductor layer; a second semiconductor region of a second conductivity type, selectively provided in the second surface of the second semiconductor layer, and having a depth reaching the first semiconductor region from the second surface of the second semiconductor layer; a third semiconductor region of the second conductivity type, selectively provided in the second semiconductor region, the third semiconductor region having an impurity concentration higher than an impurity concentration of the second semiconductor region; a fourth semiconductor region of the first conductivity type, selectively provided in the second surface of the second semiconductor layer, and having a depth reaching the first semiconductor region from the second surface of the second semiconductor layer, the fourth semiconductor region being provided separately from the second semiconductor region, and having an impurity concentration higher than the impurity concentration of the second semiconductor layer; a fifth semiconductor region of the first conductivity type provided in the fourth semiconductor region, the fifth semiconductor region being disposed in the second surface of the second semiconductor layer, and having an impurity concentration higher than the impurity concentrations of the second semiconductor layer and the fourth semiconductor region; a first electrode provided on the second surface of the second semiconductor layer, and being electrically connected to the third semiconductor region; and a second electrode provided on the second surface of the second semiconductor layer, and being electrically connected to the fifth semiconductor region.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 91.0
- Lexical Diversity: 3.16981
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15447088', '15232562', '14719409', '13962218', '14821571']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9238148072128504
- 35 USC 102 Novelty (BERT): 0.496224039950311
- Combined Prediction Score: 0.8810557304865966
- Mean Citation Score: 267.984706
- Max Citation Score: 276.68472
- Similarity Product: 234.78621792986868

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