Carbon Nanotube Wire Connection Structure for Reliable Substrate Bonding
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Solution Overview
Problem
Carbon nanotube wires with diameters of 0.05 mm to 3.00 mm face challenges in connection reliability due to low wettability with solder and flexibility, making it difficult to fix them to substrates or electrodes, and there is a lack of established methods for reliable connection.
Innovation Solution
A connected structure involving a conductive fixing member with needle-like members that penetrate and anchor the carbon nanotube wire, providing mechanical stress and increased contact area, along with a conductive member like solder for electrical connection, to enhance fixation stability and electroconductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a carbon nanotube wire is used as an electric wire, then light weight and electroconductivity are improved, but wettability to solder deteriorates
Solution Approach 1:
A conductive paste is introduced as an intermediary material between the carbon nanotube wire and the electrode. The conductive paste has good wettability with both the carbon nanotube wire and the electrode, enabling reliable electrical connection. This mediator resolves the incompatibility between carbon nanotube surface properties and solder wettability.
2Adaptability or versatility
If a thin carbon nanotube wire with average diameter of 0.05 mm to 3.00 mm is used, then flexibility is improved, but ease of positioning deteriorates
Solution Approach 1:
The conductive paste is applied to the electrode surface before the carbon nanotube wire is positioned. This preliminary application of adhesive material creates a bonding surface that can securely hold the wire once positioned, compensating for the difficulty of precisely positioning thin, flexible wires during assembly.
3Reliability
If a thin carbon nanotube wire is used, then electroconductivity is improved, but fixation stability deteriorates
Solution Approach 1:
The conductive paste serves as a mediator that provides both electrical conductivity and mechanical bonding. It creates a stable connection between the thin carbon nanotube wire and the electrode, preventing detachment while maintaining electroconductivity. The paste fills gaps and creates a robust interface that secures the wire.
4Ease of manufacture
If conventional soldering method is used for carbon nanotube wire, then manufacturing simplicity is maintained, but connection reliability deteriorates
Solution Approach 1:
The material parameter of the bonding agent is changed from traditional solder to conductive paste. This parameter change allows the bonding material to have different properties - specifically, better wettability with carbon nanotube surfaces and appropriate viscosity for positioning - thereby improving connection reliability while maintaining the simplicity of the manufacturing process.
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
The solution achieves high connection reliability and stability by facilitating the operation of fixing the carbon nanotube wire to the substrate, improving electroconductivity and contact properties, and ensuring the carbon nanotube wire remains securely attached.
Implementation Method 1
a carbon nanotube wire, made of one or more carbon nanotube aggregates each including a plurality of carbon nanotubes, and has an average diameter of 0.05 mm to 3.00 mm; a conductive fixing member, part of which is provided between the substrate and the carbon nanotube wire; and a conductive member that electrically connects the carbon nanotube wire and the fixing member
Implementation Method 2
a conductive member that electrically connects the carbon nanotube wire and the fixing member
Data Source
AI summary
To provide a connected structure of a substrate and an electric wire with high connection reliability even when a carbon nanotube wire with an average diameter of 0.05 mm to 3.00 mm is used as the electric wire. The connected structure of the substrate and the carbon nanotube wire includes a substrate; a carbon nanotube wire made of one or more carbon nanotube aggregates each including a plurality of carbon nanotubes, the carbon nanotube wire having an average diameter of 0.05 mm to 3.00 mm; a conductive fixing member, part of which is provided between the substrate and the carbon nanotube wire; and a conductive member that electrically connects the carbon nanotube wire and the fixing member.