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 5):
The semiconductor device according to  claim 1 , wherein the first semiconductor region has a p-type impurity concentration gradient in which a p-type impurity concentration decreases stepwise in a depth direction from the first semiconductor layer toward the fourth semiconductor region.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 91.0
- Lexical Diversity: 3.16981
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15447088', '15232562', '14719409', '13962218', '14821571']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.931258495828695
- 35 USC 102 Novelty (BERT): 0.5090085194445703
- Combined Prediction Score: 0.8890334981902825
- Mean Citation Score: 267.984706
- Max Citation Score: 276.68472
- Similarity Product: 195.5633778424501

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

Dataset: test