PATENT CLAIM ANALYSIS

Application Number: 16171535
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-06
Patent Classification: ["257", "048000"]

Abstract:
An IGBT includes current sense cell having a sensing area for sensing a current flowing an active area and an extraction area for extracting a hole current. The extraction area around the sensing area, has a portion in a gate trench is not in contact with the emitter region, and a p-type well region provided deeper than the first trench and having a high impurity concentration. An area of the extraction area is four times or more and 10,000 times or less an area of the sensing area.

Claim (Index 1):
An insulated gate bipolar transistor comprising a current sense cell, including:\n a drift layer of a first conductivity type; a base region of a second conductivity type provided on the drift layer; an emitter region of the first conductivity type provided on a part of the base region and having a higher impurity concentration than the drift layer; a gate electrode buried in a first trench penetrating through at least the base region via a first insulating film; and a collector region of the second conductivity type provided under the drift layer; wherein the current sense cell includes; a sensing area in which the emitter region is provided, having a portion in contact with the emitter region in the first trench, configured to sense a current flowing in an active area; and an extraction area around the sensing area, in which the emitter region is not provided, having a portion in the first trench not in contact with the emitter region and having a first well region of the second conductivity type in an upper layer of the drift region, configured to extract a hole current flowing from the collector region through the first well region, wherein the first well region is provided deeper than the first trench and has a higher impurity concentration than the base region, and an area of the extraction area is four times or more and 10,000 times or less an area of the sensing area in the planar pattern.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 97.0
- Lexical Diversity: 1.86
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12171041', '14149412', '14154790', '14622822', '16156457']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.922665793277468
- 35 USC 102 Novelty (BERT): 0.4953469629760511
- Combined Prediction Score: 0.8799339102473264
- Mean Citation Score: 260.642482
- Max Citation Score: 265.4624
- Similarity Product: 214.46531969337465

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