Multi-Layer Thermal Spreaders and Airflow Channels for Crosstalk
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Solution Overview
Problem
Conventional thermal management systems in gaming laptops suffer from thermal crosstalk between primary and secondary components, leading to elevated operating temperatures and reduced cooling efficiency due to insufficient airflow and limited heat exchanger surface area, especially in Esther Island-based architectures.
Innovation Solution
A multi-layer thermal management system with a primary thermal conductivity spreader and a secondary thermal conductivity spreader layer positioned between the primary spreader and the circuit board, featuring discrete partitions that extend above the board to create airflow channels and facilitate thermal load balancing, using vapor chambers or heat pipes for enhanced heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single thermal module is used to cool all components, then device complexity is reduced, but thermal crosstalk between primary and secondary components increases
Solution Approach 1:
The patent divides the single thermal module into multiple independent thermal modules, each dedicated to cooling specific components (primary heat sources and secondary heat sources separately). This segmentation eliminates thermal crosstalk by preventing heat transfer between different component zones while maintaining manageable system complexity through modular design.
2Length of stationary object
If heat exchanger surface area is reduced, then device thickness is decreased, but cooling performance deteriorates
Solution Approach 1:
The patent transitions from a planar heat exchanger design to a three-dimensional stacked configuration where multiple thermal modules are vertically arranged. This dimensional change increases the effective heat exchanger surface area without increasing the horizontal footprint or overall device thickness, as the additional surface area is accessed through vertical stacking rather than lateral expansion.
3Device complexity
If airflow is insufficient, then device complexity is reduced, but primary component temperatures exceed expectations
Solution Approach 1:
The patent segments the airflow management by providing dedicated airflow paths and independent thermal modules for primary heat sources. Each thermal module has its own optimized airflow channel, ensuring sufficient cooling air supply to high-power components without requiring complex centralized airflow management systems.
4Temperature
If skin temperature limits are reached, then power levels cannot be increased, but junction temperature margins remain
Solution Approach 1:
The patent implements separate thermal management zones with independent thermal modules for primary and secondary heat sources. This allows primary high-power components to operate at higher power levels with adequate cooling, while secondary components are thermally isolated and cooled separately, preventing thermal crosstalk from limiting overall system power capacity.
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 system reduces thermal crosstalk and increases heat exchange surface area, resulting in lower junction and skin temperatures, improved thermal margins, and equivalent or better cooling performance compared to traditional evacuative systems, while maintaining acoustic levels.
Implementation Method 1
a primary thermal conductivity spreader thermally coupled to a heat-generating component. A secondary thermal conductivity spreader layer is positioned between the primary spreader and a circuit board. This secondary thermal conductivity spreader layer is also thermally coupled to the heat-generating component
Implementation Method 2
These components bridge gaps between the main heat spreader and secondary heat sources like video random access memory (VRAM) and voltage regulators, with a smaller thermal interface pad thickness to reduce overall thermal resistance
Implementation Method 3
The system includes a primary thermal conductivity spreader and a secondary thermal conductivity spreader layer positioned between the primary spreader and the circuit board, featuring discrete partitions that extend above the board to create airflow channels and facilitate thermal load balancing, using vapor chambers or heat pipes for enhanced heat dissipation
Implementation Method 4
at least part of the secondary thermal conductivity spreader layer is disposed at a distance above the circuit board to create airflow channels that enhance thermal dissipation
Data Source
AI summary
A thermal management system for an electronic device, including: a primary thermal conductivity spreader; a first heat-generating component thermally coupled to the primary thermal conductivity spreader; and a secondary thermal conductivity spreader layer positioned between the primary thermal conductivity spreader and a circuit board, wherein the secondary thermal conductivity spreader layer comprises a thermal conductivity spreader that is thermally coupled to the first heat-generating component and extends toward at least one additional heat-generating component having a lower thermal load than the first heat-generating component, wherein at least a portion of the secondary thermal conductivity spreader layer is disposed at a distance above the circuit board to define airflow channels.