Disordered Carbon Coating for Thermal and Electrical Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional thermal interface materials face challenges in providing both high electrical isolation and thermal conductivity, leading to inefficiencies in heat transfer and potential electrical leakage currents in electronic devices, especially in high-power applications.
Innovation Solution
A disordered carbon coating with high SP3 content is applied to electronic devices or heat spreaders, offering high electrical resistance and thermal conductivity, thereby blocking leakage currents and enhancing heat transfer while maintaining mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional thermal interface materials (Gap pads, Gels, Adhesives) are used to provide electrical isolation, then electrical insulation is achieved, but thermal conductivity decreases and thickness must be increased
Solution Approach 1:
The patent changes the material parameter from conventional thermal interface materials to diamond-like carbon coating, which fundamentally alters both electrical and thermal properties. The diamond-like carbon structure provides high electrical resistivity while maintaining high thermal conductivity, eliminating the trade-off between electrical isolation and heat transfer efficiency
Solution Approach 2:
The patent uses diamond-like carbon, a composite material structure with sp3 hybridized carbon atoms forming a diamond-like network. This composite structure combines the electrical insulation properties needed for isolation with the thermal conductivity of diamond, achieving both electrical isolation and efficient heat transfer simultaneously
2Reliability
If thermal connector thickness is increased to improve electrical isolation, then breakdown voltage increases, but thermal conductivity performance deteriorates
Solution Approach 1:
The patent changes the material composition to diamond-like carbon with controlled sp3 content, which provides high electrical resistivity at very thin film thicknesses (5-50 nm). This eliminates the need for thick layers while maintaining both electrical isolation and thermal conductivity
Solution Approach 2:
The patent transitions from bulk thermal interface materials to a thin-film coating approach. By applying diamond-like carbon as a thin coating on the heat spreader or heat sink surface, it achieves electrical isolation in the thickness dimension while maintaining thermal conductivity through the material's intrinsic properties
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 effectively isolates electrically while ensuring efficient heat dissipation, improving thermal and electrical performance in electronic devices, especially in high-temperature environments.
Implementation Method 1
A disordered carbon coating with high SP3 content is applied to electronic devices or heat spreaders, offering high electrical resistance and thermal conductivity, thereby blocking leakage currents and enhancing heat transfer
Implementation Method 2
A disordered carbon coating with high SP3 content is applied to electronic devices or heat spreaders, offering high electrical resistance and thermal conductivity, thereby blocking leakage currents
Data Source
Figure 1
Figure 2~4
AI summary
An electronic device assembly (200) includes a heat sink (206) coupled to an electronic device (208) to dissipate the heat produced by the electronic device. A heat spreader (204) is coupled between the electronic device and the heat sink to transfer heat from the electronic device to the heat sink, Furthermore, at least one of the electronic device, the heat spreader, and the heat sink is disposed with a disordered carbon coating (202).