Thermally Decoupled Heat Dissipation Layer for Optical Modules
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Solution Overview
Problem
The increasing density of components in parallel optical communications modules poses challenges for effective heat dissipation, as higher power consumption and thermal sensitivity require efficient heat management systems that prevent thermal crosstalk and ensure optimal operating temperatures for sensitive components.
Innovation Solution
A heat dissipation strategy is developed that allocates heat dissipation resources based on the temperature sensitivity of components, using a thermally conductive and conductive heat dissipation layer with thermally decoupled paths to manage heat from optoelectronic and IC components, ensuring efficient heat transfer and preventing thermal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of channels and components is increased to meet growing communication needs, then the functionality and data transmission capacity are improved, but the heat dissipation difficulty and thermal crosstalk risk increase
Solution Approach 1:
The heat dissipation layer is divided into multiple thermally decoupled regions, each serving as an independent heat dissipation path for specific components. This segmentation prevents heat from one component from transferring to adjacent heat-sensitive components, effectively addressing thermal crosstalk while supporting higher component density and channel counts.
Solution Approach 2:
Different regions of the heat dissipation layer are assigned different thermal coupling characteristics based on the specific heat dissipation needs of underlying components. Some regions are thermally coupled to actively dissipate heat, while others are thermally decoupled to isolate heat-sensitive components, creating localized thermal management solutions throughout the module.
2Volume of moving object
If the module size is decreased to improve integration density, then the compactness and space utilization are improved, but the heat dissipation efficiency deteriorates
Solution Approach 1:
The patent utilizes the vertical dimension by implementing heat dissipation layers on both the top and bottom surfaces of the circuit board. This multi-layer approach provides additional heat dissipation pathways without increasing the horizontal footprint of the module, enabling effective thermal management in compact form factors.
Solution Approach 2:
The heat dissipation functionality is distributed across multiple independent regions and layers rather than relying on a single large heat sink. This segmented approach maximizes the use of available space within the compact module while maintaining effective heat dissipation capacity through multiple parallel thermal pathways.
3Area of stationary object
If components are placed closer together to increase integration density, then the space utilization is improved, but the thermal interference between components increases
Solution Approach 1:
The heat dissipation layer is segmented into thermally decoupled regions that act as independent thermal zones. This allows components to be placed in close proximity while preventing thermal interference between them, as heat generated by one component is confined to its designated thermal region and cannot transfer to adjacent heat-sensitive components.
Solution Approach 2:
The thermally decoupled heat dissipation regions serve as thermal intermediaries between adjacent components. These regions are designed to either conduct heat away from active components or provide thermal isolation, acting as mediators that prevent direct thermal coupling between closely spaced components while maintaining their functional proximity.
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 approach effectively manages heat dissipation in high-density optical communications modules by prioritizing heat-sensitive components and thermally decoupling their dissipation paths, preventing thermal crosstalk and maintaining component performance and longevity.
Implementation Method 1
The heat dissipation layer comprises a layer of electrically-conductive and thermally-conductive material. At least some heat that is generated by the first optoelectronic component flows into the first portion of the heat dissipation layer. At least some heat that is generated by the first IC flows into the second portion of the heat dissipation layer.
Implementation Method 2
The first and second portions of the heat dissipation layer are thermally decoupled from one another.
Data Source
AI summary
Heat dissipation resources are allocated in an optical communications module based on the sensitivity of electrical and optoelectronic components of the module to temperature. Components that have a higher sensitivity to temperature are allocated a greater proportion of available heat dissipation resources than components that have a lower sensitivity to temperature. In addition, heat dissipation resources that are allocated to components that have different sensitivities to temperature are thermally decoupled from one another.