Formable Thermal Interface Material with EMI Shielding
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Solution Overview
Problem
Current thermal interface materials face challenges such as lack of adhesion, reliability issues, and limited adaptability to varying gap thicknesses, making them ineffective for applications requiring efficient heat transfer and electromagnetic interference shielding.
Innovation Solution
A formable structure comprising a first material with low viscosity and a second material with higher viscosity, where the second material can harden to hold the first material in a specific position or shape, and can also function as an electromagnetic interference shield by incorporating electrically conductive filler particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional thermal interface materials (greases, phase change materials) are used, then thermal conductivity is improved, but adhesion is worsened and reliability deteriorates over time
Solution Approach 1:
The patent uses a composite material system consisting of a polymer matrix combined with thermally conductive filler particles (such as aluminum oxide, boron nitride, or metal particles). This composite structure provides both high thermal conductivity from the filler particles and strong adhesion from the polymer matrix, resolving the contradiction between thermal performance and reliability.
2Temperature
If thermal interface materials are designed for specific gap thicknesses, then thermal performance is improved, but adaptability to varying gap sizes is worsened
Solution Approach 1:
The patent employs materials with adjustable viscosity characteristics that can be tailored to accommodate different gap thicknesses. The material's flow properties allow it to adapt dynamically to varying gap sizes during application, while maintaining optimal thermal contact pressure and filling capability across a wide range of gap configurations.
Solution Approach 2:
The patent utilizes materials with可调 viscosity parameters that can be optimized for different application requirements. By changing the viscosity parameter of the thermal interface material, the same material can effectively fill gaps of varying thicknesses, providing both high thermal performance and broad adaptability.
3Temperature
If thermal interface materials focus on thermal conductivity, then heat transfer is improved, but electromagnetic interference shielding is worsened
Solution Approach 1:
The patent designs a multi-functional thermal interface material that simultaneously provides thermal conduction and electromagnetic interference shielding. The material incorporates thermally conductive filler particles for heat transfer while also including electrically conductive components (such as metal particles or conductive polymers) that create an EMI shield, allowing a single material to perform both functions effectively.
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 enables improved thermal connectivity and adaptability to a wide range of gap sizes, while also providing effective electromagnetic interference shielding, enhancing the overall thermal performance and reliability of the system.
Implementation Method 1
The first material can be configured to function as a thermal interface between two or more hardware components... improve thermal connectivity between the components
Implementation Method 2
The second material can include a light-activated resin that causes the second material to harden when exposed to specific light spectrums
Implementation Method 3
the second material can be loaded with electrically conductive filler particles, such as various metals or carbon-based materials... function as an electromagnetic interference (EMI) shield
Data Source
AI summary
A formable structure comprises a first material having a first level of viscosity and a second material having a second level of viscosity, wherein the second material is formed to hold at least a portion of the first material in a particular position or a particular shape. The first material can be configured to function as a thermal interface between two or more hardware components. The second material can be configured to have a higher viscosity than the first material. In one illustrative example, the second material can include a light-activated resin that is configured to harden when exposed to one or more treatments. By the use of the first material and second material, the techniques disclosed herein are adaptable to gaps having a wide range of sizes, which is difficult to do with traditional thermal interface materials. The second material can also function as an EMI shield.