PATENT CLAIM ANALYSIS

Application Number: 15748492
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-01
Patent Classification: ["257", "355000"]

Abstract:
The present invention provides an embedded high voltage LDMOS-SCR device with strong voltage clamp and ESD robustness, which can be used as the on-chip ESD protection for high voltage IC. Wherein said the device comprises a P substrate, a P well, a N well, a first field oxide isolation region, a first P+ injection region, a second field oxide isolation region, a first N+ injection region, a first fin polysilicon gate, a second N+ injection region, a second fin polysilicon gate, a third N+ injection region, a third fin polysilicon gate, a polysilicon gate, a fourth fin polysilicon gate, a second P+ injection region, a fifth fin polysilicon gate, a third P+ injection region, a sixth fin polysilicon gate, a fourth P+ injection region, a third oxygen isolation region, a fourth N+ injection region and a fourth field oxygen isolation region. Under the influence of ESD pulse, the ESD discharge current path with LDMOS-SCR structure and the RC coupling current path with embedded PMOS interdigital structure in the drain terminal and embedded NMOS interdigital structure in the source terminal are formed,in order to enhance the ESD robustness of the device and improve the voltage clamp capability.

Claim (Index 4):
The device of  claim 1 , wherein the embedded PMOS interdigital structure and the embedded NMOS interdigital structure is capable to increase the parasitic capacitance of the device, and under the influence of transient ESD pulse, a trigger current of parasitic resistance in P well( 102 ) and N well( 103 ) is capable to be increased due to a RC coupling effect, and a trigger voltage of the device is capable to be reduced, and a voltage clamp capability of the device is enhanced and the current conduction uniformity of the device is improved.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 86.0
- Lexical Diversity: 2.8961
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['11186086', '14478817', '13693524', '14066095', '15389217']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9214513100801816
- 35 USC 102 Novelty (BERT): 0.5028162030329413
- Combined Prediction Score: 0.8795877993754575
- Mean Citation Score: 220.960532
- Max Citation Score: 222.68536
- Similarity Product: 144.89753511563302

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test