Graphene Circuit Pattern via Metal Redox Transformation
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Solution Overview
Problem
Current metal circuit patterns in electronic products, such as those made of Cu or Al, suffer from high resistance and poor corrosion resistance, limiting their application in high-end devices, while graphene offers excellent electrical conductivity but lacks a cost-effective and simple method for pattern preparation.
Innovation Solution
A method involving immersing a metal circuit pattern in a graphene oxide solution to induce a redox reaction, forming a graphene circuit pattern, which can be controlled in thickness and concentration, and subsequently drying at low temperatures to prevent stress and cracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal circuit patterns (Cu or Al) are used in electronic products, then the circuit patterns can be easily manufactured, but the resistance is large and corrosion resistance is weak
Solution Approach 1:
The patent changes the material parameter from metal to graphene through a chemical transformation process. By immersing the metal circuit pattern in graphene oxide solution, a redox reaction occurs that transforms the metal surface into graphene coating, thereby changing the electrical conductivity and corrosion resistance parameters while maintaining the original circuit pattern geometry and manufacturability
Solution Approach 2:
The patent creates a composite structure where graphene coating is formed on the metal circuit pattern substrate. This composite material combines the ease of manufacture of metal with the excellent corrosion resistance and electrical conductivity of graphene, achieving both manufacturing simplicity and high reliability
2Ease of manufacture
If metal circuit patterns (Cu or Al) are used in electronic products, then the circuit patterns can be easily manufactured, but the resistance is large
Solution Approach 1:
The patent changes the electrical conductivity parameter by transforming the metal surface into graphene through redox reaction. Graphene's resistivity is about 10^-8 Ω·m compared to copper's 0.017 Ω·m, representing a 170,000 times improvement in electrical conductivity while maintaining the same circuit pattern structure and manufacturing process
3Reliability
If graphene circuit pattern is formed by redox reaction, then excellent conductivity and stability are achieved, but the process complexity increases
Solution Approach 1:
The patent employs a self-service mechanism where the metal circuit pattern itself serves as the reducing agent in the redox reaction with graphene oxide. The metal atoms on the circuit pattern surface directly reduce graphene oxide to graphene while being oxidized themselves, eliminating the need for external reducing agents or complex multi-step processing
Solution Approach 2:
The patent uses graphene oxide solution as an intermediary substance that facilitates the transformation from metal to graphene. The graphene oxide acts as a mediator that accepts electrons from the metal surface during redox reaction, enabling controlled graphene formation without requiring complex direct reduction processes
4Reliability
If graphene circuit pattern is formed by redox reaction, then excellent stability is achieved, but the manufacturing cost increases
Solution Approach 1:
The metal circuit pattern serves as its own reducing agent, eliminating the need for expensive external reducing chemicals. The metal atoms themselves provide the electrons needed to reduce graphene oxide, converting chemical potential energy of the metal into the graphene structure without requiring additional costly reagents
Solution Approach 2:
The patent utilizes the sacrificial oxidation of metal atoms as a disposable resource to enable graphene formation. The metal atoms on the surface are consumed in the redox reaction, but since they are part of the existing circuit pattern structure and the process uses simple aqueous graphene oxide solution, the overall cost remains low compared to other graphene synthesis methods
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 method enables the production of graphene circuit patterns with excellent conductivity and stability, suitable for mass production, reducing impedance and improving circuit performance, and can be applied as signal lines in electronic products like liquid crystal or organic light-emitting display panels.
Implementation Method 1
immersing a metal circuit pattern in a graphene oxide solution to cause a redox reaction between the metal circuit pattern and graphene oxide, thereby forming the graphene circuit pattern
Data Source
AI summary
A method of preparing a graphene circuit pattern, a substrate and an electronic product are disclosed. The method of preparing a graphene circuit pattern includes: immersing a metal circuit pattern in a graphene oxide solution to cause a redox reaction between the metal circuit pattern and graphene oxide, thereby forming the graphene circuit pattern. The graphene circuit pattern may be directly formed at a location of the metal circuit pattern, and is simple in production process, low in cost, and suitable for mass production.