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 9):
A method of manufacture comprising:\n (a) forming an P type body region that extends into an N type drift layer, wherein the N type drift layer is disposed over a P type substrate layer; (b) forming an auxiliary P type well region that extends into the N type drift layer, wherein the auxiliary P type well region and the P type body region are separated from one another by an amount of the N type drift layer; (c) forming an N type source region that extends into the P type body region; (d) forming a gate; (e) forming a first metal terminal, wherein the first metal terminal is coupled to the P type body region and to the N type source region; (f) forming a second metal terminal, wherein the second metal terminal is coupled to the gate; (g) forming a third metal terminal, wherein the third metal terminal is coupled to the auxiliary P type well region; and (h) forming a fourth metal terminal that is coupled to the P type substrate layer, wherein the P type substrate layer, the N type drift layer, the P type body region, the auxiliary P type well region, the N type source region, the first metal terminal, the second metal terminal, the third metal terminal, and the fourth metal terminal are all parts of an Insulated Gate Bipolar Transistor (IGBT) die structure.

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): 0.8209507705098278
- 35 USC 102 Novelty (BERT): 0.5816112398278085
- Combined Prediction Score: 0.7970168174416259
- Mean Citation Score: 408.798482
- Max Citation Score: 502.13318
- Similarity Product: 444.43987692983865

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