On Board Transceiver Thermal Decoupling via Segmented Substrate
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Solution Overview
Problem
Existing heat management solutions for electronic and opto-electronic components, particularly in densely packed optical transceivers, fail to effectively decouple components with different heat generation rates, leading to elevated temperatures and reduced reliability.
Innovation Solution
The implementation of separate heat paths for different electrical components within an assembly, where each component is thermally connected to a distinct heat sink, reducing thermal conductivity between them and allowing independent temperature regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate heat paths are implemented for different electrical components, then temperature decoupling and reliability are improved, but device complexity increases
Solution Approach 1:
The thermal management system is segmented into multiple independent heat paths, each serving specific components with different thermal requirements. The substrate is divided into first and second portions with different thermal conductivities, creating separate thermal zones that can be independently managed.
Solution Approach 2:
Different regions of the substrate are assigned different thermal properties to match the specific thermal needs of components in those regions. The first portion has higher thermal conductivity for heat-generating components, while the second portion has lower thermal conductivity for temperature-sensitive components.
2Reliability
If thermal conductivity between components is reduced, then temperature decoupling is improved, but heat dissipation efficiency may worsen
Solution Approach 1:
The substrate is segmented into regions with different thermal conductivities, allowing simultaneous optimization of heat dissipation in some areas and thermal isolation in others. This segmentation enables each component to have its thermal requirements met without compromising overall system efficiency.
Solution Approach 2:
The thermal conductivity parameter of the substrate is varied spatially across different portions. By changing this physical parameter locally, the system achieves both effective heat dissipation where needed and thermal isolation where required, resolving the contradiction between these two opposing requirements.
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 decouples the temperature of heat-generating components, ensuring optimal operating conditions and extending the lifespan of temperature-sensitive components like VCSELs while allowing other components to operate at higher temperatures.
Implementation Method 1
the first component is thermally connected with a heat sink along a first heat path and the second component is connected with a heat sink along a second, different, heat path
Data Source
AI summary
An electrical component assembly includes a substrate and first and second electrical components attached to the substrate and operably connected with each other via the substrate. In use the first electrical component generates a first amount of heat and the second component generates a second amount of heat. The first component is thermally connected with a heat sink along a first heat path and the second component is connected with the heat sink along a second, different, heat path, such that the thermal conductivity between the first and second components is lower than the thermal conductivity of the first heat path and of the second heat path.