Planarized Metal Foam Composites for Thermal Interface Bonding
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Solution Overview
Problem
Metal foams used as thermal interface materials (TIMs) face reduced heat transfer efficiency due to their irregularly formed pores, leading to decreased bonding areas and inefficient heat conduction.
Innovation Solution
A method involving planarization treatment of metal foams with a porosity of 30% to 60% and maximum pore size of 45 µm or less, combined with a curable polymer, to create a composite material with improved thermal conductivity and stability in oxidizing environments, using acrylic, siloxane-based, epoxy, olefin, polyester, polyamide, urethane, or phenol resins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If metal foam is used as thermal interface material, then lightweight properties and heat radiation capability are improved, but surface flatness deteriorates leading to reduced bonding area
Solution Approach 1:
The patent applies planarization treatment to the metal foam surface before it is used as a thermal interface material. This preliminary action flattens the irregular porous surface, ensuring maximum bonding area is achieved before the material is installed, thereby resolving the contradiction between maintaining porous structure for heat radiation and achieving flat surface for bonding.
2Shape
If planarization treatment is applied to metal foam, then surface flatness is improved, but porosity may be reduced affecting thermal conductivity
Solution Approach 1:
The patent carefully controls the planarization treatment parameters to achieve surface flattening while maintaining porosity within the optimal range of 30% to 60%. By adjusting treatment intensity and duration, the process modifies surface topology without collapsing the internal porous structure, thus resolving the contradiction between surface flatness and thermal conductivity.
3Reliability
If porosity is maintained at high level, then thermal conductivity is improved, but surface irregularity increases reducing bonding efficiency
Solution Approach 1:
The patent applies planarization treatment specifically to the surface layer of the metal foam while preserving the bulk porous structure. This creates local differentiation where the surface is flattened for bonding purposes while the interior maintains high porosity for thermal conductivity, thereby resolving the contradiction between bonding efficiency and thermal 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 method results in a composite material with enhanced heat conduction efficiency and stability, preventing peeling issues, while maintaining a smooth surface and reducing thermal resistance.
Implementation Method 1
the curable polymer may mean a polymer exhibiting a property capable of being cured by an external stimulus such as irradiation of light or application of heat
Implementation Method 2
the curable polymer may mean a polymer exhibiting a property capable of being cured by an external stimulus such as irradiation of light or application of heat
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3(a)~3(b)
AI summary
The present application relates to: a method for manufacturing a composite material; and a composite material. The composite material obtained in the present application can have high heat conduction efficiency. The composite material obtained in the present application can secure stability in an oxidizing and/or high temperature atmosphere, or the like. The composite material obtained in the present application has an advantage capable of preventing occurrence of peeling problems or the like, especially when applied as a heat radiation material or the like