PATENT CLAIM ANALYSIS

Application Number: 15968968
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-11
Patent Classification: ["257", "384000"]

Abstract:
Various aspects of the disclosure include nanosheet-FET structures having a wrap-all-around contact where the contact wraps entirely around the S/D epitaxy structure, not just on the top and sides of the S/D epitaxy structure, thereby increasing contact area and ultimately allowing for improved S/D contact resistance. Other aspects of the disclosure include nanosheet-FET structures having a bottom isolation to reduce parasitic S/D leakage to the substrate.

Claim (Index 14):
The method of  claim 12 , further comprising,\n before the forming of the nanosheet stacks on the substrate:\n forming a bottom isolation layer on the substrate such that the bottom isolation layer is between the substrate and each nanosheet stack, each nanosheet stack comprising alternating sheets of silicon germanium (SiGe) and silicon (Si); \n before the growing of the S/D epitaxy structure:\n partially indenting the SiGe layers of each nanosheet stack; \n depositing inner spacer material on the bottom isolation layer and edges of the nanosheet stacks; \n recessing the inner spacer material to form inner spacers on edges of the SiGe layers of each nanosheet stack; \n directional etching of the bottom isolation layer and into the substrate, thereby creating a substrate recess between adjacent nanosheet stacks; \n growing SiGe from a top surface of the substrate within the substrate recess, thereby forming a SiGe recess layer; \n forming a sacrificial SiGe layer on the SiGe recess layer; \n after the growing of the S/D epitaxy structure:\n forming a sacrificial SiGe cap layer around the S/D epitaxy structure such that the sacrificial SiGe cap layer merges with the sacrificial SiGe layer on the SiGe recess layer, thereby forming a sacrificial SiGe-encapsulated S/D structure; \n forming a first dielectric fill on and around the sacrificial SiGe-encapsulated S/D structure; \n removing a portion of the first dielectric fill such that at least a portion of the sacrificial SiGe cap layer is exposed; \n removing the sacrificial SiGe encapsulating the S/D structure.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 93.0
- Lexical Diversity: 1.62791
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15888401', '15434205', '15657659', '15241772', '15868742']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9137744040966272
- 35 USC 102 Novelty (BERT): 0.5315017198884144
- Combined Prediction Score: 0.8755471356758059
- Mean Citation Score: 305.3313100000001
- Max Citation Score: 339.0741
- Similarity Product: 226.3955703186929

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