3D Printed Multi-Material Thermal Management Device
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Solution Overview
Problem
Current electronics packaging faces inefficiencies in thermal management due to the use of thermal interface materials (TIMs) which add thermal resistance and complexity, especially when dealing with non-planar heat sources, and materials that conduct heat well also conduct electricity, leading to electrical isolation issues.
Innovation Solution
A thermal management device is 3D printed using two different thermally conductive plastic materials, where one material is softer and more compliant for direct contact with heat sources, and the other is harder for structural support, eliminating the need for TIMs and addressing electrical isolation concerns by integrating insulating properties where needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal interface materials (TIMs) are used to join heat transfer components to heat sources, then thermal contact is improved for non-planar surfaces, but thermal resistance increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the heat transfer component and the interface material into a single integrated component. The heat sink is formed with an integrated compliant interface that directly contacts the heat source, eliminating the need for separate TIM layers. This reduces manufacturing steps while maintaining effective thermal contact through the compliant material built into the heat sink structure itself.
Solution Approach 2:
The patent extracts the TIM function from a separate component and integrates it directly into the heat sink structure. The compliant material is built as part of the heat sink during additive manufacturing, removing the need for separate TIM application steps and reducing overall assembly complexity.
2Reliability
If thermal interface materials (TIMs) are used to join heat transfer components to heat sources, then thermal contact is improved, but thermal resistance increases
Solution Approach 1:
The patent merges the heat transfer component and the interface material into a single integrated component. The heat sink is formed with an integrated compliant interface that directly contacts the heat source, eliminating the need for separate TIM layers. This reduces manufacturing steps while maintaining effective thermal contact through the compliant material built into the heat sink structure itself.
Solution Approach 2:
The patent changes the physical parameters of the interface material by making it compliant and conformable. The additive manufacturing process allows precise control of the interface material's density and elasticity, enabling it to adapt to non-planar heat source surfaces and minimize thermal resistance through optimal contact pressure distribution.
3Loss of energy
If materials with high thermal conductivity are used, then heat transfer efficiency is improved, but electrical conductivity increases causing electrical isolation issues
Solution Approach 1:
The patent applies different material properties to different regions of the heat sink. The interface portion uses highly thermally conductive material for maximum heat transfer, while other portions of the heat sink use materials with lower electrical conductivity. This spatial differentiation of material properties allows simultaneous optimization of thermal performance and electrical isolation.
Solution Approach 2:
The patent uses composite materials that combine thermal conductivity with electrical insulation properties. The additive manufacturing process enables integration of multiple materials with complementary properties, creating a heat sink that achieves both efficient heat transfer and electrical isolation through material composition rather than separate components.
4Reliability
If multiple separate components are used for heat transfer and electrical isolation, then functional requirements are met, but component count increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the heat transfer component and the interface material into a single integrated component. The heat sink is formed with an integrated compliant interface that directly contacts the heat source, eliminating the need for separate TIM layers. This reduces manufacturing steps while maintaining effective thermal contact through the compliant material built into the heat sink structure itself.
Solution Approach 2:
The patent designs the heat sink to perform multiple functions simultaneously: heat transfer, electrical isolation, and mechanical support. The integrated structure with varying material properties throughout enables a single component to fulfill roles that traditionally required multiple separate parts, reducing assembly complexity while meeting all functional requirements.
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
This approach reduces thermal resistance, manufacturing complexity, and cost by creating a single contiguous component that effectively manages heat transfer while maintaining electrical isolation, enhancing thermal conductivity and reducing component count.
Implementation Method 1
a first portion (102) made of a first thermally conductive plastic and a second portion (101) extending away from the first portion. The second portion is made of a second thermally conductive plastic
Data Source
AI summary
A thermal management device includes a single contiguous component. The single contiguous component includes a first portion made of a first thermally conductive plastic, and a second portion extending away from the first portion. The second portion is made of a second thermally conductive plastic. The second thermally conductive plastic is different than the first thermally conductive plastic. The second portion has a greater hardness than the first portion.