Graphene Channel Transfer Structure to Prevent Process Damage
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Solution Overview
Problem
Conventional manufacturing methods for electronic devices using graphene result in process damages to the graphene layer, leading to reduced mobility and increased noise, which deteriorate the performance of the devices.
Innovation Solution
The electronic device incorporates a single-layered graphene layer as a channel region, a multi-layered graphene layer adjacent to it, and catalytic metals on the surface, with a specific manufacturing method that includes forming catalytic metals, depositing a graphene layer, and covering it with an insulation film, allowing for improved handling and reduced process damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional manufacturing methods are used to form source and drain electrodes on the graphene layer, then the electronic device can be manufactured, but process damages occur in the graphene layer causing mobility reduction and noise increase
Solution Approach 1:
The source and drain electrodes are formed on the graphene layer before the graphene is transferred to the final substrate. This preliminary formation of electrodes avoids subsequent processing steps that would damage the graphene after transfer, thereby maintaining graphene layer integrity while enabling device manufacturing
Solution Approach 2:
The conventional sequence is inverted: instead of transferring graphene first and then forming electrodes, the electrodes are formed on the graphene while it is still on the catalyst substrate, and the entire structure is then transferred. This inversion eliminates the need for post-transfer graphene processing that causes damage
2Device complexity
If the graphene layer is processed into a channel region after formation, then the device structure can be defined, but process damages cause mobility reduction and noise increase
Solution Approach 1:
The channel region definition and electrode formation are performed as preliminary steps before graphene transfer. By defining the device structure while the graphene is still on the catalyst substrate, subsequent transfer operations do not require additional graphene processing that would cause damage and reduce reliability
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
This configuration and method effectively suppress process damages, enhancing the performance of the electronic device by maintaining mobility and reducing noise, thereby improving the overall performance of the graphene-based electronic device and electromagnetic wave detector.
Implementation Method 1
forming a graphene layer on the second catalytic metal that is exposed and on the third catalytic metal that is exposed
Data Source
AI summary
The manufacturing method for the electronic device using graphene includes: forming a catalytic metal, forming a catalytic metal, forming a passivation film so as to expose upper surfaces of the catalytic metal and the catalytic metal, forming a graphene layer on the catalytic metal and catalytic metal that are exposed, forming a insulation film so as to cover the graphene layer, forming a substrate on the insulation film, and removing the catalytic metal.