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 12):
The production method of the compound semiconductor device according to  claim 6 , further comprising:\n preparing the semiconductor substratet including a rear surface layer that is provided on a rear surface side, 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; forming a base region of the second conductivity type on the drift layer; forming a source region of the first conductivity type having a higher impurity concentration than the drift layer in an upper portion of the base region; forming a gate trench from a surface of the source region to a position deeper than base region; forming a trench gate structure by forming a gate insulation layer on an inner wall of the gate trench and forming a gate electrode on the gate insulation layer; forming a source electrode electrically coupled with the source region; and forming a drain electrode electrically coupled with the rear surface layer on the rear surface side of the semiconductor substrate, wherein the forming the deep trench includes forming the deep trench so as to penetrate the base region from the surface of the source region to the drift layer and be formed to a position deeper than the gate trench, and the forming the first conductivity type region includes forming the first conductivity type region at the corner potion of the bottom of the deep trench.

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): 0.9271217712061748
- 35 USC 102 Novelty (BERT): 0.5275534203604509
- Combined Prediction Score: 0.8871649361216023
- Mean Citation Score: 310.384496
- Max Citation Score: 356.01843
- Similarity Product: 268.9961641277951

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