Thermal Interface Material Barrier for Pump-Out Prevention
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Solution Overview
Problem
Thermal interface materials (TIMs) used to improve heat transfer between electronic components and heat exchangers can 'pump out' due to thermal expansion and contraction, reducing heat transfer efficiency and electrical performance, and existing solutions either compromise on heat transfer capability or increase costs.
Innovation Solution
A barrier is physically placed around the periphery of the TIM to prevent it from being squeezed out, maintaining its position between heat transfer surfaces and ensuring uninterrupted heat transfer without structural interference, thus enhancing heat transfer efficiency in high-power and high-heat applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal interface material is used to fill air gaps between heat transfer surfaces, then heat transfer efficiency is improved, but the TIM can pump out due to thermal expansion and contraction, reducing heat transfer efficiency
Solution Approach 1:
The patent applies preliminary anti-action by placing a barrier around the TIM before thermal expansion and contraction can cause pump-out. The barrier prevents the TIM from being squeezed out during thermal cycles, counteracting the harmful effect before it occurs. This resolves the contradiction by maintaining TIM position stability while preserving heat transfer efficiency.
Solution Approach 2:
The barrier acts as an intermediary element between the TIM and the external environment. It mediates the thermal expansion and contraction forces, preventing them from directly causing TIM pump-out. The barrier allows the TIM to maintain its position and function while isolating it from the harmful mechanical effects of thermal cycling.
2Stability of the object's composition
If a barrier is placed around the TIM to prevent pump-out, then TIM position stability is improved, but structural interference may impede heat transfer
Solution Approach 1:
The barrier is designed with local quality by being positioned only at the periphery of the TIM, leaving the central heat transfer region untouched. This localized approach provides structural support and prevents pump-out at the edges while maintaining uninterrupted heat transfer pathways in the center, thus resolving the contradiction between TIM stability and heat transfer efficiency.
Solution Approach 2:
The barrier structure is segmented or configured to provide support at critical locations without creating continuous structural interference. By dividing the barrier into strategic segments or positioning it only where needed at the TIM periphery, the design prevents pump-out while minimizing obstruction to heat flow, balancing TIM stability with heat transfer performance.
3Stability of the object's composition
If existing solutions are used to prevent TIM pump-out, then TIM position stability is improved, but heat transfer capability is compromised or costs increase
Solution Approach 1:
The patent uses a simple barrier structure that copies or mimics effective containment concepts from other applications, adapting them to the TIM context. This straightforward approach provides TIM stability without the complexity and cost of existing solutions, while maintaining heat transfer capability by avoiding excessive structural interference. The barrier replicates the essential function of containment in a minimal, effective form.
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 solution maintains heat transfer efficiency by keeping the TIM in place, preventing pump-out and ensuring continuous heat transfer, which is essential for high-power electronic devices, while avoiding structural obstructions that could impede performance.
Implementation Method 1
a viscous TIM providing a heat transfer pathway between the electronic component and the heat transfer component
Implementation Method 2
a barrier about at least a portion of a periphery of the viscous TIM to maintain the viscous TIM within a confined location
Data Source
AI summary
Electronic device heat transfer technology is disclosed. In an example, an electronic device package can include a substrate. The electronic device package can also include a heat transfer component. The electronic device package can further include a heat-generating electronic component coupled to the substrate between the substrate and the heat transfer component. The electronic device package can also include a viscous thermal interface material (TIM) providing a heat transfer pathway between the electronic component and the heat transfer component. In addition, the electronic device package can include a barrier about at least a portion of a periphery of the viscous TIM to maintain the viscous TIM within a confined location in proximity to the electronic component. The TIM is uninterrupted by the barrier within the periphery.