PATENT CLAIM ANALYSIS

Application Number: 15874342
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-09
Patent Classification: ["257", "139000"]

Abstract:
To obtain a semiconductor device in which a reduction in channel formation density in a trench extending direction is suppressed, provided is a semiconductor device including a first region and a second region alternately arranged in the trench extending direction. The first region includes a first front surface semiconductor electrode layer of a first conductivity type having a portion along an outer side surface of the trench from the front surface of the semiconductor device to the first height to which a gate electrode is embedded into the trench. The second region includes a base contact region having a depth from the front surface of the semiconductor device to the second height higher than the first height and a second front surface semiconductor electrode layer of the first conductivity type from the first height to the second height.

Claim (Index 1):
A semiconductor device, comprising:\n a semiconductor substrate; a first electrode formed in contact with a front surface of the semiconductor substrate; and a second electrode formed in contact with a back surface of the semiconductor substrate, the semiconductor substrate comprising:\n a back surface semiconductor electrode layer of a first conductivity type formed to have a predetermined thickness from the back surface of the semiconductor substrate; \n a base region of a second conductivity type formed above the back surface semiconductor electrode layer; \n a trench having a depth from the front surface of the semiconductor substrate to an upper surface of the back surface semiconductor electrode layer; \n a gate insulating film covering a bottom surface and a side surface of an inside of the trench, and having an upper end portion positioned at a first height between the front surface of the semiconductor substrate and the bottom surface of the trench; \n a gate electrode embedded into the trench to the first height via the gate insulating film; \n an insulating film embedded in the trench on the gate insulating film and the gate electrode to the front surface of the semiconductor substrate; and \n a first region and a second region being in contact with the trench, and alternately arranged in an extending direction of the trench, \n the first region comprising:\n a first front surface semiconductor electrode layer of the first conductivity type having a portion along an outer side surface of the trench from the front surface of the semiconductor substrate to the first height, and a portion in contact with the first electrode, \n \n the second region comprising:\n a base contact region of the second conductivity type having a depth from the front surface of the semiconductor substrate to a second height higher than the first height, a concentration higher than a concentration of the base region, a portion at least partially in contact with the base region, and a portion in contact with the first electrode; and \n a second front surface semiconductor electrode layer having a portion along the outer side surface of the trench from the first height to the second height, and a portion in contact with the first front surface semiconductor electrode layer on a surface perpendicular to the extending direction of the trench.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 86.0
- Lexical Diversity: 2.67925
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15825896', '15816481', '14737314', '14647187', '12379076']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.92594582254131
- 35 USC 102 Novelty (BERT): 0.4962966278491149
- Combined Prediction Score: 0.8829809030720907
- Mean Citation Score: 263.381814
- Max Citation Score: 278.75644
- Similarity Product: 237.7712472985363

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