Liquid Metal Heat Dissipation Structure With Crushed Leakage Fence
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Solution Overview
Problem
The existing heat dissipation structures for semiconductor chips like GPUs and CPUs face issues with liquid metal leakage due to vibrations and impacts, leading to decreased heat conduction performance, as the surface of the die is not perfectly flat, causing uneven gaps between the die and the heat dissipator.
Innovation Solution
A heat dissipation structure that includes a heat dissipator with liquid metal interposed between the electric component and the heat dissipator, and a fencing body, such as a high-viscosity grease, is applied around the liquid metal in a crushed state to prevent leakage, with an exhaust gap for air discharge and strategically placed to manage the angular interval of electric elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid metal is used as thermal interface material between die and heat dissipator, then heat conduction performance is improved, but liquid metal leaks out due to vibration and impact
Solution Approach 1:
A fencing body made of curable resin is introduced as an intermediary substance between the liquid metal and the external environment. The resin is applied in a crushed state around the liquid metal and then cured to form a rigid fence structure that contains the liquid metal, preventing its leakage while preserving the thermal contact between liquid metal and heat dissipator.
Solution Approach 2:
The fencing body is applied in advance around the liquid metal before the heat dissipator is permanently fixed. The resin is applied in a crushed state, then cured to form a containment structure that prevents future leakage during vibration and impact, addressing the stability issue before it occurs.
2Stability of the object's composition
If a fencing body is applied around liquid metal to prevent leakage, then liquid metal position stability is improved, but heat conduction performance may decrease due to additional thermal resistance
Solution Approach 1:
The fencing body is applied locally only around the peripheral region of the liquid metal, leaving the central contact area between liquid metal and heat dissipator untouched. This localized application contains the liquid metal to prevent leakage while minimizing interference with the primary heat conduction path.
Solution Approach 2:
The resin material undergoes a parameter change from a crushed, flexible state during application to a cured, rigid state after hardening. This transformation allows the resin to adapt to the liquid metal shape and then provide structural containment, balancing the need for thermal contact and leakage prevention.
3Reliability
If the heat dissipator is pressed to improve thermal contact, then heat conduction performance is improved, but air pockets may form reducing effectiveness
Solution Approach 1:
Exhaust gaps are pre-formed in the fencing body at strategic locations before the heat dissipator is pressed down. These gaps provide designated escape routes for air pockets, allowing them to be discharged during the pressing operation without creating voids that would compromise thermal contact.
Solution Approach 2:
Air pockets are actively removed from the interface between the heat dissipator and die by providing exhaust gaps that allow air to escape during the pressing process. This extraction of air prevents the formation of insulating voids that would reduce heat conduction effectiveness.
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 effectively prevents liquid metal leakage during vibrations or impacts, maintaining heat conduction performance by ensuring the liquid metal remains in place, even when the die's central part is raised relative to its peripheral part.
Implementation Method 1
Liquid metal has higher thermal conductivity than thermally conductive grease, and can effectively transfer heat from the die to the heat dissipator
Implementation Method 2
A fencing body, such as a high-viscosity grease, is applied around the liquid metal in a crushed state to prevent leakage
Data Source
AI summary
A heat dissipation structure of an electric component that generates heat includes: a heat dissipator provided along a surface of the electric component; a liquid metal interposed between the electric component and the heat dissipator; and a fencing body interposed between the electric component and the heat dissipator in a crushed state and surrounding the liquid metal.