PATENT CLAIM ANALYSIS

Application Number: 15866851
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["257", "369000"]

Abstract:
Techniques for source/drain isolation in nanosheet devices are provided. In one aspect, a method of forming a nanosheet device includes: forming an alternating series of sacrificial/active channel nanosheets as a stack on a substrate; forming gates on the stack; forming spacers alongside opposite sidewalls of the gates; patterning the stack, in between the spacers, into individual PFET/NFET stacks and pockets in the substrate; laterally recessing the sacrificial nanosheets in the PFET/NFET stacks to expose tips of the active channel nanosheets in the PFET/NFET stacks; forming inner spacers alongside the PFET/NFET stacks covering the tips of the active channel nanosheets; forming a protective layer lining the pockets; and selectively etching back the inner spacers to expose tips of the active channel nanosheets and epitaxially growing source and drains from the exposed tips of the active channel nanosheets sequentially in the PFET/NFET stacks. A nanosheet device is also provided.

Claim (Index 9):
The method of  claim 1 , further comprising the steps of:\n selectively etching back the inner spacers to expose tips of the active channel nanosheets in the PFET stacks; epitaxially growing source and drains from the exposed tips of the active channel nanosheets in the PFET stacks; selectively etching back the inner spacers to expose tips of the active channel nanosheets in the NFET stacks; and epitaxially growing source and drains from the exposed tips of the active channel nanosheets in the NFET stacks.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 86.0
- Lexical Diversity: 2.26761
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15802021', '15802067', '15475567', '15801967', '15791467']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9341234571603916
- 35 USC 102 Novelty (BERT): 0.5311424637651072
- Combined Prediction Score: 0.8938253578208633
- Mean Citation Score: 357.106582
- Max Citation Score: 369.5966
- Similarity Product: 250.85139176119569

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

Dataset: test