PATENT CLAIM ANALYSIS

Application Number: 16190549
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-04
Patent Classification: ["257", "347000"]

Abstract:
A method of forming a GAA FinFET, including: forming a fin on a substrate, the substrate having a STI layer formed thereon and around a portion of a FIN-bottom portion of the fin, the fin having a dummy gate formed thereover, the dummy gate having a gate sidewall spacer on sidewalls thereof; forming a FIN-void and an under-FIN cavity in the STI layer; forming first spacers by filling the under-FIN cavity and FIN-void with a first fill; removing the dummy gate, thereby exposing both FIN-bottom and FIN-top portions of the fin underneath the gate; creating an open area underneath the exposed FIN-top by removing the exposed FIN-bottom; and forming a second spacer by filling the open area with a second fill; wherein a distance separates a top-most surface of the second spacer from a bottom-most surface of the FIN-top portion. A GAA FinFET formed by the method is also disclosed.

Claim (Index 1):
A gate-all-around (GAA) FinFET comprising:\n a substrate having at least one bi-layer fin formed thereon; a shallow trench isolation (STI) layer formed on the substrate and around a portion of a FIN-bottom portion of the bi-layer fin; a high-k metal gate (HKMG) around a FIN-top portion of the bi-layer fin, the HKMG not touching any portion of the substrate and the HKMG having a gate sidewall spacer formed on sidewalls thereof; at least two first spacers composed of a first fill, one first spacer being in the STI layer and not underneath the HKMG and the gate sidewall spacer, another first spacer being in the STI layer and underneath the gate sidewall spacer but not underneath the HKMG; a second spacer composed of a second fill, the second spacer being in the STI layer and underneath the HKMG and the FIN-top portion of the fin, a top surface of the second spacer being in contact with a bottom surface of the HKMG; and a source adjacent to a first sidewall of the FIN-top portion and a drain adjacent to a second sidewall of the FIN-top portion, the second sidewall being opposite to the first sidewall, the source and the drain being above the STI layer and the first spacers and not touching any portion of the substrate; wherein a distance separates a top-most surface of the second spacer from a bottom-most surface of the FIN-top portion.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 98.0
- Lexical Diversity: 2.52308
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15790216', '15413558', '16126775', '16018970', '15424937']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.920514584245836
- 35 USC 102 Novelty (BERT): 0.5627559589857946
- Combined Prediction Score: 0.8847387217198318
- Mean Citation Score: 309.90712599999995
- Max Citation Score: 452.88513
- Similarity Product: 362.2529605397522

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