PATENT CLAIM ANALYSIS

Application Number: 15870267
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["257", "347000"]

Abstract:
A method for fabrication a nanosheet device includes providing forming a stacked layer on a substrate, having first material layers and second material layers in different materials, alternatingly stacked up. The stacked layer is patterned to a stacked fin. A dummy stack is formed on the stacked fin. An etching back process is performed with the dummy stack with spacers to etch the stacked fin and expose the substrate. Laterally etches the first material layers and the second material layers, to have indent portions. Inner spacers fill the indent portions. A first/second source/drain layer is formed on the substrate at both sides of the dummy stack. Etching process is performed to remove the dummy gate of the dummy stack and the selected one of the first material layers and the second material layers between the inner spacers. Metal layer fills between the spacers and the inner spacers.

Claim (Index 9):
A method for fabricating a nanosheet device, comprising:\n providing a substrate, having an N-type device region and a P-type device region; forming a stacked layer on the substrate, having a plurality of first material layers and a plurality of second material layers with different material but in equal number, alternatingly stacked over the substrate; forming a top first material layer on the stacked layer at the P-type device region; patterning the stacked layer at an N-type device region to form a first stacked fin, and the stacked layer with the top first material layer at the P-type device region to form a second stacked fin; forming a dummy stack on the first stacked fin and the second stacked fin, wherein the dummy stack comprises an insulating layer and a dummy gate sequentially stacked on the first and second stacked fins and a pair of spacers on sidewalls of the dummy gate; performing an etching back process with the dummy stack serving as an etching mask to etch the first and second stacked fins and expose the substrate; laterally etching the first material layers of the first stacked fin to have a pair of first indent portions; laterally etching the second material layers of the second stacked fin to have a pair of second indent portions; forming a pair of first inner spacers to fill the first indent portions and a pair of second inner spacers to fill the second indent portions; forming a first source/drain layer and a second source/drain layer on the substrate at both sides of the dummy stack; performing an etching process to remove the dummy gate of the dummy stack and the first material layers between the first inner spacers at the N-type device region, and remove the dummy gate of the dummy stack and the second material layers between the second inner spacers at the P-type device region; and forming a metal layer, filling between the spacers and the first inner spacers at the N-type device region and between the spacers and the second inner spacers at the P-type device region.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 86.0
- Lexical Diversity: 2.37313
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15007920', '15045759', '15847334', '15847296', '15730306']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9218185694817636
- 35 USC 102 Novelty (BERT): 0.4998603052785701
- Combined Prediction Score: 0.8796227430614442
- Mean Citation Score: 257.76234800000003
- Max Citation Score: 274.12817
- Similarity Product: 216.6841481491768

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