Additive Vapor Chamber for Microprocessor Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As microprocessors become smaller, faster, and more powerful, they generate more heat in a smaller space, making thermal management a significant concern, especially in compact electronic devices where there is insufficient room for active thermal management components like fans, necessitating improved passive heat dissipation methods.
Innovation Solution
The implementation of a passive thermal management system using a vapor chamber with capillary features and a layer of material, such as paraffin wax, thermally connected to a heat generating component, and additive manufactured directly on an enclosure plate to minimize thermal resistance and maximize heat transfer, allowing for optimized heat rejection through phase change and convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If microprocessors are made smaller, faster, and more powerful, then processing capability is improved, but heat generation increases in a smaller space
Solution Approach 1:
The patent employs a vapor chamber that utilizes phase transitions of a working fluid (evaporation and condensation) to transfer heat away from the microprocessor. The working fluid evaporates at the heat source region, absorbs latent heat, and condenses in cooler regions, effectively managing the high heat generation density of powerful microprocessors.
Solution Approach 2:
The patent incorporates porous material within the vapor chamber structure to facilitate capillary action, enabling the working fluid to be transported back to the evaporation region without requiring external pumps or fans. This passive fluid circulation is critical for managing heat in compact devices.
2Device complexity
If passive thermal management is used instead of active components like fans, then device complexity is reduced, but heat dissipation capability is limited
Solution Approach 1:
The vapor chamber is designed as a self-regulating passive thermal management system. The phase change process and capillary action automatically regulate heat flow without external control, eliminating the need for fans or active cooling components while maintaining effective heat dissipation.
Solution Approach 2:
The system leverages the high latent heat of vaporization of the working fluid to achieve efficient heat absorption at the source. This phase transition mechanism provides superior heat dissipation capability compared to conventional passive methods, enabling the system to handle high power densities without active components.
3Temperature
If vapor chamber is additive manufactured directly on enclosure plate, then thermal resistance is minimized, but manufacturing complexity increases
Solution Approach 1:
The vapor chamber is integrated directly into the enclosure plate through additive manufacturing, merging two previously separate components into one. This integration eliminates thermal resistance at the interface and reduces the number of assembly steps, offsetting the increased manufacturing process complexity with simplified final assembly.
Solution Approach 2:
Additive manufacturing enables complex internal geometries and optimized thermal pathways within the vapor chamber that would be difficult or impossible to achieve with traditional manufacturing methods. The process allows for precise control of material deposition parameters to optimize thermal performance while minimizing interfacial thermal resistance.
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 enables improved heat dissipation, allowing for more powerful microprocessors, thinner devices, and extended operation at higher power levels without overheating, while reducing device thickness and eliminating the need for fans, thus enhancing thermal management and device performance.
Implementation Method 1
heat is transferred from at least one evaporation region to at least one condensation region by means of evaporated working fluid
Implementation Method 2
working fluid is caused by the upper evaporator plate to evaporate and transfer heat via the vapour space
Implementation Method 3
heat is transferred from at least one evaporation region to at least one condensation region by means of evaporated working fluid
Implementation Method 4
condensed working fluid passes by capillary action through the walls of the chambers and the powdered material in the chambers back to the upper evaporator plate
Implementation Method 5
additive manufactured directly on an enclosure plate to minimize thermal resistance and maximize heat transfer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Thermal management devices and systems, and corresponding manufacturing methods are described herein. A thermal management device includes a plate having a first surface. The first surface partially defines a chamber of the thermal management device. The thermal management device also includes capillary features disposed on the plate, and walls having a first end and a second end. The walls are disposed on the plate and extend away from the first surface of the plate, at the first end, to the second end. The walls partially define the chamber of the thermal management device. The thermal management device also includes a layer of material disposed on the walls, at the second end of the wall. The layer of material partially defines the chamber.