PATENT CLAIM ANALYSIS

Application Number: 15986886
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-11
Patent Classification: ["257", "329000"]

Abstract:
Vertical field effect transistor complementary metal oxide semiconductor (VFET CMOS) structures and methods of fabrication include a single mask level for forming the dual source/drains in both the NFET region and the PFET region. The VFET CMOS structures and methods of fabrication further include equal epi-to-channel distances in both the NFET region and PFET regions.

Claim (Index 11):
A method of forming a vertical field effect transistor complementary metal oxide (VFET CMOS) structure comprising:\n forming an n-type field effect transistor (NFET) region including one or more vertically oriented fins and a p-type field effect transistor (PFET) region including one or more vertically oriented fins on a silicon substrate, wherein each of the fins include a hardmask disposed on top surface thereof; forming a spacer layer on sidewalls of the one or more vertically oriented fins and hardmask; removing a portion of the silicon substrate underlying the one or more vertically oriented fins to form a first recess therein; epitaxially growing an in-situ boron doped SiGe in the first recess for both the NFET region and the PFET region; conformally depositing a first liner layer on the silicon substrate; applying a mask material on the PFET region, wherein the NFET region is free of the mask material; directionally etching the first liner layer from horizontal surfaces in the NFET region, wherein the directionally etching exposes the boron doped SiGe in the NFET region; removing the mask material from the PFET region; and replacing the boron doped SiGe from the NFET region with an epitaxially grown in-situ phosphorous doped silicon such that the PFET region includes the in-situ boron doped SiGe to define a PFET bottom source or drain (S/D) and the NFET region includes the in-situ phosphorous doped silicon to define a NFET bottom S/D.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 93.0
- Lexical Diversity: 1.51282
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15918077', '13848203', '14750455', '15404466', '14729105']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9303206239058688
- 35 USC 102 Novelty (BERT): 0.5201423951848152
- Combined Prediction Score: 0.8893028010337635
- Mean Citation Score: 323.995334
- Max Citation Score: 332.1764
- Similarity Product: 246.41209997279643

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