PATENT CLAIM ANALYSIS

Application Number: 16070061
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["257", "288000"]

Abstract:
A compound semiconductor device includes a semiconductor substrate having a ground layer of a first conductivity type made of a compound semiconductor, a first conductivity type region formed at a corner portion of a bottom of a deep trench formed to the ground layer, and a deep layer of a second conductivity type formed in the deep trench so as to cover the first conductivity type region. A cross section of the first conductivity type region is a triangular shape or a rounded triangular shape in which a portion of the first conductivity type region being in contact with the deep layer is recessed to have a curved surface.

Claim (Index 3):
The compound semiconductor device according to  claim 1 , comprising a vertical MOSFET that includes:\n the semiconductor substrate including a rear surface layer that is provided on a rear surface side and has a high impurity concentration, and a drift layer of the first conductivity type that is provided on a front surface side to form the ground layer and has a lower impurity concentration than the rear surface layer; a base region of the second conductivity type formed on the drift layer; a source region of the first conductivity type formed in an upper portion of the base region and having a higher impurity concentration than the drift layer; a trench gate structure including a gate insulation layer that is formed on an inner wall of a gate trench provided from a surface of the source region to a position deeper than base region, and a gate electrode formed on the gate insulation layer; a source electrode electrically coupled with the source region; and a drain electrode electrically coupled with the on the rear surface side of the semiconductor substrate, wherein the deep trench penetrates the source region and the base region to the drift layer and is formed to a position deeper than the gate trench, the first conductivity type region is formed at a portion in the deep trench below the base region so as to be apart from the base region, and the deep layer is formed in the deep trench so as to cover the first conductivity type region.

Metadata:
- Claim Count in Document: 23.0
- Percentile: 95.0
- Lexical Diversity: 2.35417
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16069914', '16069927', '14894668', '15365150', '14400365']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9269692226039628
- 35 USC 102 Novelty (BERT): 0.5263602215533213
- Combined Prediction Score: 0.8869083224988987
- Mean Citation Score: 310.384496
- Max Citation Score: 356.01843
- Similarity Product: 303.5011780589873

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