PATENT CLAIM ANALYSIS

Application Number: 15876184
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["327", "432000"]

Abstract:
An IGBT die structure includes an auxiliary P well region. A terminal, that is not connected to any other IGBT terminal, is coupled to the auxiliary P well region. To accelerate IGBT turn on, a current is injected into the terminal during the turn on time. The injected current causes charge carriers to be injected into the N drift layer of the IGBT, thereby reducing turn on time. To accelerate IGBT turn off, charge carriers are removed from the N drift layer by drawing current out of the terminal. To reduce V CE(SAT) , current can also be injected into the terminal during IGBT on time. An IGBT assembly involves the IGBT die structure and an associated current injection/extraction circuit. As appropriate, the circuit injects or extracts current from the terminal depending on whether the IGBT is in a turn on time or is in a turn off time.

Claim (Index 14):
A method of turning on an Insulated Gate Bipolar Transistor (IGBT) of an IGBT die structure, wherein the IGBT die structure comprises an IGBT, wherein the IGBT die structure comprises a P type body region that extends into an N type drift layer and also comprises an auxiliary P type well region that extends into the N type drift layer, wherein the IGBT die structure further comprises an N type source region that extends into the P type body region, wherein a first metal terminal of the IGBT die structure is coupled to the N type source region and to the P type body region, wherein a second metal terminal of the IGBT die structure is coupled to a gate, wherein a third metal terminal of the IGBT die structure is coupled to the auxiliary P type well region, and wherein a fourth metal terminal of the IGBT die structure is coupled to a collector of the IGBT, the method comprising:\n during a turn on time TON of the IGBT injecting a current into the third metal terminal of the IGBT die structure such that the injected current flows through the third metal terminal and through an auxiliary P type well and into the N type drift layer thereby increasing a concentration of charge carriers in the N type drift layer.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 86.0
- Lexical Diversity: 2.27397
- Patent Class: 327.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13662395', '13662384', '14864317', '14840322', '14931426']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8228242052111148
- 35 USC 102 Novelty (BERT): 0.5742083557129039
- Combined Prediction Score: 0.7979626202612937
- Mean Citation Score: 408.798482
- Max Citation Score: 502.13318
- Similarity Product: 406.7817799723315

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