Carbon Nanotube Heat Radiation Sheet Coating
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Solution Overview
Problem
Carbon nanotube heat radiation sheets face challenges in maintaining thermal conductivity and mechanical strength due to softening when lengthened for better contact with electronic components, leading to potential separation and failure to follow component deformation.
Innovation Solution
A method involving the growth of carbon nanotubes on a base film, followed by vaporizing the base film to form a silicon oxide coating film containing materials like aluminum, titanium, or platinum, which increases the nanotubes' elasticity and reinforces them, ensuring effective heat transfer and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the length of the carbon nanotube is increased to increase the thickness of the heat radiation sheet, then the heat radiation sheet can maintain contact with the electronic component, but the carbon nanotube becomes soft and may collapse under pressure
Solution Approach 1:
The patent combines carbon nanotubes with a coating film formed from vaporized base film material to create a composite structure. The coating film reinforces the carbon nanotubes, providing mechanical strength while maintaining their thermal conductivity and flexibility for heat radiation application.
Solution Approach 2:
The patent changes the physical state of the base film material by vaporizing it and then depositing it as a coating film on the carbon nanotubes. This phase transition and subsequent deposition process transforms the material properties to achieve both reinforcement and thermal conductivity.
2Length of moving object
If the length of the carbon nanotube is increased to increase the thickness of the heat radiation sheet, then the heat radiation sheet can maintain contact with the electronic component, but the carbon nanotube becomes soft and does not follow the deformation of the electronic component
Solution Approach 1:
The coating film creates a composite structure that maintains the carbon nanotube's ability to deform with the electronic component while providing structural stability. The coating reinforces the nanotube without restricting its flexibility, allowing it to follow component deformation.
3Strength
If a coating film is applied to reinforce the carbon nanotube, then the mechanical strength increases, but it is difficult to coat the entirety of a long carbon nanotube with existing technology
Solution Approach 1:
The base film material vaporizes and automatically deposits onto the carbon nanotubes through vapor-phase transport. This self-service mechanism ensures uniform coating of the entire carbon nanotube surface without requiring complex coating equipment or processes.
Solution Approach 2:
The patent utilizes phase transition of the base film material from solid to vapor and then to deposited solid film. This phase change enables complete and uniform coating of long carbon nanotubes by allowing the material to reach all surfaces through vapor-phase diffusion and condensation.
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 enhances the thermal conductivity and mechanical strength of carbon nanotube heat radiation sheets, allowing them to maintain contact with electronic components and withstand deformation, thereby improving heat transfer efficiency and reliability.
Implementation Method 1
vaporizing at least a part of the base film by heating the base film to coat the carbon nanotube with a coating film containing a material of the vaporized base film
Implementation Method 2
a plurality of carbon nanotubes are provided upright on a sheet to transport heat from one end to the other end of each carbon nanotube
Data Source
AI summary
There is provided a method of manufacturing a heat radiation sheet, the method including: forming a base film on a substrate; growing a plurality of carbon nanotubes on the base film; and vaporizing at least a part of the base film by heating the base film to coat the carbon nanotube with a coating film containing a material of the vaporized base film.