Graphene Stacked Structure Manufacturing via Sacrificial Substrates
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Solution Overview
Problem
Current mass manufacturing techniques for silicon-based electronic devices cannot be directly applied to produce graphene-based electronic devices or circuits due to the unique properties of graphene, hindering the scalable production of graphene-based apparatus.
Innovation Solution
A method involving the formation of stacked structures with graphene layers on substrates, where sacrificial substrates are used to create and then remove layers, allowing for the adhesion of graphene layers through Van der Waals forces, optionally with dielectric layers in between, and patterning electrodes for electronic device fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If silicon-based mass manufacturing techniques are used, then production scalability is achieved, but they cannot be applied to graphene-based devices due to graphene's unique properties
Solution Approach 1:
The manufacturing process is divided into separate stages: graphene layer formation on sacrificial substrates, transfer to final substrates, and subsequent device fabrication. This segmentation allows each stage to be optimized independently, enabling mass production while accommodating graphene's unique properties.
Solution Approach 2:
Sacrificial substrates are introduced as intermediary carriers that temporarily hold graphene layers during fabrication. These substrates enable graphene transfer to final devices without requiring direct compatibility between graphene and the manufacturing infrastructure, resolving the adaptability issue while maintaining productivity.
2Ease of manufacture
If graphene layers are transferred between substrates, then device fabrication is enabled, but adhesion between layers must be maintained
Solution Approach 1:
Dielectric layers serve as intermediaries between graphene layers, providing both mechanical support during transfer and controlled adhesion in the final structure. This enables easy manipulation and transfer while maintaining reliable electrical and mechanical connections.
Solution Approach 2:
The adhesion properties between graphene layers are controlled by adjusting parameters such as dielectric layer thickness, material composition, and surface treatment. This allows optimization of both transferability and adhesion reliability for different device requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the scalable production of graphene-based electronic devices with improved adhesion and patterning, facilitating the creation of functional integrated circuits and transistors with enhanced performance.
Implementation Method 1
allowing for the adhesion of graphene layers through Van der Waals forces
Data Source
AI summary
An apparatus including: a stacked structure including a first substrate having a flat surface; a flat first graphene layer adjacent the flat surface of the first substrate; a flat second graphene layer adjacent the flat first graphene layer; and a second substrate having a flat surface adjacent the flat second graphene layer. An apparatus including: a stacked structure including a substrate having a flat upper surface; a flat lower patterned layer overlying the flat upper surface of the substrate and including at least one patterned electrode; a flat lower graphene layer overlying the flat lower patterned layer; a flat upper graphene layer overlying the flat lower graphene layer; and a flat upper patterned layer overlying the flat upper graphene layer and including at least one patterned electrode.