Thermal Interface Cap for Optical Subassembly Heat Dissipation
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Solution Overview
Problem
Communication modules, particularly optical subassemblies, face thermal management challenges due to heat generated during signal conversion, which can lead to damage and unstable performance, and existing thermoelectric coolers may not effectively dissipate heat in high-temperature environments.
Innovation Solution
A thermal interface comprising a thermally conductive cap with a base, fingers, and an extension, along with a gasket, is used to efficiently dissipate heat from optical subassemblies to the module's shell, enhancing heat transfer and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing thermoelectric coolers are used to manage heat in optical subassemblies, then some cooling function is provided, but heat dissipation effectiveness is insufficient in high-temperature environments
Solution Approach 1:
The thermal interface is segmented into multiple functional components: a cap with base, fingers, and extension; a gasket with openings; and integration with the shell. This segmentation allows each component to serve specific thermal management functions, improving overall heat dissipation effectiveness compared to a single thermoelectric cooler component.
Solution Approach 2:
The patent introduces a thermal interface as an intermediary component between the optical subassembly and the shell. This interface includes a cap with thermally conductive material and a gasket, serving as a mediator to enhance heat transfer from the optical subassembly to the shell, resolving the insufficient heat dissipation of existing thermoelectric coolers.
2Reliability
If thermal management is improved to prevent damage and stabilize performance, then reliability is enhanced, but device complexity increases due to additional thermal interface components
Solution Approach 1:
The cap serves multiple functions: it provides a thermally conductive path for heat dissipation, acts as a mechanical support structure with fingers and extension, and integrates with the gasket to seal the optical subassembly. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while improving reliability.
Solution Approach 2:
The patent merges the thermal conduction function with the mechanical support and sealing functions into a single integrated thermal interface assembly. The cap with fingers and extension is combined with the gasket, creating a unified structure that improves reliability without proportionally increasing complexity.
3Temperature
If heat dissipation is enhanced through improved thermal interface, then temperature control is improved, but manufacturing complexity increases due to precise alignment requirements of cap openings and gasket openings
Solution Approach 1:
The cap and gasket are designed with pre-defined opening patterns that align with the optical subassembly structure. The fingers and extension of the cap are positioned to match corresponding features on the gasket and shell, allowing for preliminary alignment during assembly and reducing the need for complex post-assembly adjustments.
Solution Approach 2:
The thermal interface components have non-uniform structures with specific local features: the cap has a base with fingers and extension, and the gasket has openings positioned to match. This local quality variation optimizes thermal conduction paths at critical locations while simplifying manufacturing at other areas, balancing temperature control with ease of manufacture.
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 thermal interface facilitates effective heat dissipation, reducing the risk of damage and improving performance by maintaining manageable temperature levels, and also reduces power consumption by up to 26.4 milliwatts.
Implementation Method 1
A thermal interface comprising a thermally conductive cap with a base, fingers, and an extension, along with a gasket, is used to efficiently dissipate heat from optical subassemblies to the module's shell
Data Source
AI summary
A thermal interface may include a thermally conductive cap. The thermally conductive cap may include a base, a finger, and an extension. The base may define a plurality of cap openings. The finger may extend from the base. The extension may extend from the base. The thermal interface may also include a gasket defining a plurality of gasket openings. The gasket may be located on the base of the cap such that the gasket openings are positioned over the cap openings.