Heat Dissipating Coating Composition for Electronic Thermal Management
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Solution Overview
Problem
Existing heat dissipating technologies face challenges in achieving excellent thermal conductivity, durability, adhesion to surfaces, and surface quality, particularly in electronic devices, where metal heat sinks are heavy and inefficient, and coating solutions struggle with peeling and uneven surfaces.
Innovation Solution
A heat dissipating coating composition comprising a main resin, carbon-based filler, and physical property enhancing components, such as glycidyl ether type epoxy resin, carbon black, and silane-based compounds, which form a coating layer with improved thermal conductivity, adhesion, and surface smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a metal heat sink with high thermal conductivity is used, then heat conduction is improved, but heat dissipation efficiency to air is very low
Solution Approach 1:
The patent applies composite materials by combining metal base material with a coating layer containing heat dissipating fillers (graphite, carbon black, metal powder) dispersed in a resin matrix. This composite structure enables the coating layer to effectively radiate and dissipate heat to air, compensating for the metal heat sink's poor convective heat dissipation while maintaining thermal conductivity.
Solution Approach 2:
The patent changes the surface properties parameters by forming a coating layer with specific composition (resin, filler, solvent) and controlled thickness (1-10 μm). The filler content, particle size distribution, and coating composition are optimized to maximize heat radiation efficiency and dissipation performance, transforming the surface characteristics to improve overall heat dissipation.
2Loss of energy
If an oxide film is formed on the metal heat sink surface by anodizing, then heat dissipation is improved, but the oxide film peels off during use
Solution Approach 1:
Instead of relying on a single oxide film, the patent uses a composite coating layer comprising resin matrix, heat dissipating fillers, and adhesion promoters. This multi-component composite structure provides both heat dissipation functionality and mechanical durability, preventing the peeling issue associated with simple oxide films.
Solution Approach 2:
The patent introduces an intermediary adhesion promoter layer between the metal substrate and the coating layer. This intermediary component enhances bonding strength and ensures long-term adhesion durability, preventing the coating from peeling off during use while maintaining heat dissipation performance.
3Loss of energy
If a heat dissipating coating layer is formed on the heat dissipating member, then heat dissipating performance is improved, but the coating layer surface is uneven or filler protrudes
Solution Approach 1:
The patent optimizes multiple parameters including filler particle size distribution (using both fine and coarse fillers), filler content (5-50 wt%), coating thickness (1-10 μm), and resin-to-solvent ratio. These parameter adjustments ensure proper filler embedding, smooth surface formation, and uniform coating quality without protruding fillers.
Solution Approach 2:
The patent employs a dual filler size approach where fine fillers (e.g., carbon black with D50=10 μm) provide smooth surface quality while coarse fillers (e.g., graphite with D50=50 μm) enhance heat dissipation. This local quality differentiation within the coating layer resolves the conflict between surface smoothness and heat dissipation performance.
4Ease of manufacture
If the number of heat dissipating fins is reduced to simplify structure, then manufacturing is simplified, but heat dissipating performance decreases
Solution Approach 1:
The patent changes the surface properties of the heat dissipating member by applying a coating layer with enhanced heat radiation characteristics. This parameter change in surface emissivity and thermal properties compensates for the reduced surface area from fewer fins, maintaining heat dissipation performance while simplifying the overall structure.
Solution Approach 2:
The coating layer acts as a functional composite material that enhances the heat dissipation capability per unit area. By improving the thermal radiation efficiency through the filler-containing coating, the system achieves adequate heat dissipation with fewer fins, thus simplifying manufacturing while maintaining performance.
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 composition achieves excellent heat dissipating performance, prevents peeling, maintains durability against physical and chemical stimuli, and ensures a smooth surface quality, making it suitable for various industries requiring heat dissipation.
Implementation Method 1
a heat dissipating coating composition for forming a heat dissipating coating layer which exhibits excellent heat dissipating performance
Implementation Method 2
heat dissipating performance and simultaneously is excellent in durability of the coating layer
Data Source
AI summary
A heat dissipating coating composition is provided. A heat dissipating coating composition according to an embodiment of the present disclosure includes a coating layer forming component including a main resin. The heat dissipating coating composition also includes a carbon-based filler including 8 to 72 parts by weight with respect to 100 parts by weight of the main resin and a physical property enhancing component for improving heat dissipating and adhering properties. Accordingly, a heat dissipating coating layer having excellent heat dissipating performance can be realized by having not only good heat conductivity but also good heat radiation.