PATENT CLAIM ANALYSIS

Application Number: 15898669
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-08
Patent Classification: ["257", "369000"]

Abstract:
A transistor, such as laterally diffused (LD) transistor, having a band region below a drift well is disclosed. The band region and drift well are oppositely doped. The band region is self-aligned to the drift well. The band region reduces the depth of the drift well. A shallower drift well reduces risk of punch-through, improving reliability. In addition, the shallower drift well reduces the drain to body parasitic capacitance which improves performance.

Claim (Index 15):
A method for forming a device comprising:\n providing a substrate, wherein the substrate is defined with a device region; forming a device well in the substrate in the device region, wherein the device well is configured to occupy a source side of a transistor to be formed over the device region; forming a drain well in the substrate in the device region, wherein the drain well is configured to occupy a drain side of the transistor, the drain well abuts the device well; forming a self-aligned band region under the drain well; forming a gate of the transistor disposed on a top surface of the substrate in the device region, the gate having first and second gate sidewalls, wherein\n the first gate sidewall is disposed on the source side of the transistor with the device well extending under the gate from the first gate sidewall, and \n the second gate sidewall is disposed on the drain side of the transistor, the drain well extends under the gate and abuts the device well from the second gate sidewall; and \n forming first and second source/drain (S/D) regions in the substrate, the first S/D region is disposed adjacent to the first gate sidewall and the second S/D region is disposed adjacent to the second gate sidewall.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 88.0
- Lexical Diversity: 1.86667
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15842899', '14983583', '13803091', '15898671', '11551887']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9195762345437444
- 35 USC 102 Novelty (BERT): 0.4943676144837321
- Combined Prediction Score: 0.8770553725377431
- Mean Citation Score: 238.060854
- Max Citation Score: 246.22734
- Similarity Product: 185.0213858162641

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