Multi-Chip Module Heatsink With Selective Airflow for Hot Chiplets
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Solution Overview
Problem
Existing heat sink technologies for multi-chip modules (MCMs) face challenges in efficiently distributing airflow to address varying heat generation across different chiplets, leading to inefficiencies in cooling and potential overheating.
Innovation Solution
The proposed heat sink configuration includes a base plate with heat pipes positioned proximate to heat-generating components, sets of fins for heat dissipation, and sets of louvers that can be selectively opened to allow airflow, thereby focusing cooling efforts on regions generating the most heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional heat sinks with uniform fin distribution are used, then manufacturing is simple, but heat dissipation efficiency is insufficient for localized hot spots
Solution Approach 1:
The heat sink is divided into multiple zones with different fin configurations. Each zone has fins tailored to the thermal characteristics of the underlying chiplet, creating localized heat dissipation pathways that optimize cooling efficiency for each region while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
Different regions of the heat sink are equipped with fins of varying heights, densities, and orientations based on the specific thermal load requirements of each chiplet. High-heat-generation areas receive enhanced fin coverage and higher fin density, while lower-heat areas have reduced fin structures, optimizing overall heat dissipation efficiency
2Reliability
If airflow is distributed uniformly across all fins, then cooling coverage is comprehensive, but energy consumption increases and critical regions may still overheat
Solution Approach 1:
The heat sink incorporates adjustable louvers that can dynamically redirect airflow based on real-time thermal conditions. This dynamic airflow management system allows the cooling strategy to adapt to varying thermal loads, directing more airflow to critical hot spots when needed while reducing overall airflow energy consumption during normal operating conditions
Solution Approach 2:
The system uses thermal sensors to monitor temperatures at different chiplet locations and provides feedback to the airflow control mechanism. This feedback loop enables the system to automatically adjust louver positions and airflow distribution to optimize cooling efficiency and reduce energy consumption by targeting only the regions that require additional cooling
3Power
If more chiplets are configured to increase computing power, then processing capability improves, but heat generation increases requiring more complex cooling
Solution Approach 1:
The heat sink is segmented into multiple independent zones, each with its own optimized fin structure and airflow control. This segmentation allows the cooling system to handle higher computing power configurations by providing dedicated cooling pathways for each chiplet, managing heat from multiple high-power components without requiring a monolithic complex cooling system
Solution Approach 2:
Each chiplet region is equipped with locally optimized fin structures that match the specific thermal characteristics of that chiplet. This local quality approach allows the system to support higher computing power configurations by efficiently managing heat at each local zone, reducing the overall cooling system complexity compared to a uniform high-capacity cooling system
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 configuration enables selective and efficient cooling of hot chiplets by directing airflow to critical regions, reducing energy consumption, and supporting higher power configurations with fewer chiplets, while minimizing acoustic output.
Implementation Method 1
The heat sink includes a plurality of heat pipes
Implementation Method 2
the base plate is configured to locate at least one of the plurality of heat pipes proximate each of the plurality of heat-generating components
Implementation Method 3
a plurality of sets of fins operable to dissipate heat generated by the heat-generating components
Implementation Method 4
Heat sinks are widely used for controlling excessive heat. Typically, heat sinks are formed with fins or other similar structures to increase the surface area of the heat sink and thereby enhance heat dissipation
Data Source
AI summary
A heat sink to selectively dissipate heat from a plurality of heat-generating components. The heat sink includes a plurality of heat pipes, and a base plate configured to locate at least one of the plurality of heat pipes proximate each of the plurality of heat-generating components. The heat sink also includes a plurality of sets of fins operable to dissipate heat generated by the heat-generating components, and a plurality of sets of louvers, wherein each of the plurality of sets of louvers is associated with one of the plurality of sets of fins and is operable to open to selectively allow airflow from outside the heat sink to dissipate heat from one of the plurality of sets of fins.