PATENT CLAIM ANALYSIS

Application Number: 15883503
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-08
Patent Classification: ["257", "401000"]

Abstract:
A method of forming gate structures to a nanosheet device that includes forming at least two stacks of nanosheets, wherein each nanosheet includes a channel region portion having a gate dielectric layer present thereon. The method may further include forming a dual metal layer scheme on the gate dielectric layer of each nanosheet. The dual metal layer scheme including an etch stop layer of a first composition and a work function adjusting layer of a second composition, wherein the etch stop layer has a composition that provides that the work function adjusting layer is removable by a wet etch chemistry that is selective to the etch stop layer.

Claim (Index 7):
A method for producing nanosheet semiconductor devices comprising:\n forming a first stack of suspended nanosheets on a first region of a substrate and a second stack of suspended nanosheets on a second region of the substrate; forming a gate dielectric on a channel region of each nanosheet of the first stack of suspended nanosheets and the second stack of suspended nanosheets; forming a dual metal layer scheme on the gate dielectric layer of each nano sheet, the dual metal layer scheme comprising an etch stop layer of a first composition and a work function adjusting layer of a second composition, wherein the etch stop layer has a composition that provides that the work function adjusting layer is removable by a wet etch chemistry that is selective to the etch stop layer; and removing the work function adjusting layer from the second stack of suspended nanosheets in the second region of the substrate, while the work function adjusting layer remains on the first stack of suspended nanosheets, the work function adjusting layer is removed from the second stack of suspended nanosheets by a wet chemical etch that is selective to the etch stop layer, wherein the etch stop layer allows for an entirety of the work function adjusting layer to be removed from the second stack of the suspended nanosheets by protecting the gate dielectric on at least the edges and upper sheet surface of the channel region of the suspended nanosheets.

Metadata:
- Claim Count in Document: 6.0
- Percentile: 86.0
- Lexical Diversity: 1.98246
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15819567', '15802067', '15801967', '15802021', '15602225']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9311215346214734
- 35 USC 102 Novelty (BERT): 0.5225010954325943
- Combined Prediction Score: 0.8902594907025856
- Mean Citation Score: 331.928208
- Max Citation Score: 344.4151
- Similarity Product: 275.94304894561765

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