Heat Sink Ramp Protects Thermal Interface Material
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Solution Overview
Problem
Existing I/O connector systems face challenges in thermal management, particularly with the increased use of active cables, which can lead to thermal issues due to the need for cooling of modules within guide frames or cages, and existing thermal management methods can be costly and space-intensive, especially in high-density architectures.
Innovation Solution
A connector system featuring a thermally conductive heat sink with a base, ramp, and pedestal, where a thermal interface material is used to efficiently transfer heat from modules to the heat sink for dissipation, protecting the interface material during module insertion and ensuring effective thermal transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If active copper or fiber optic cables are used to transmit signals over longer distances, then signal transmission capability is improved, but thermal burden on the system increases
Solution Approach 1:
The heat sink extracts thermal energy from the module by providing a dedicated thermal management structure that interfaces directly with the module's heat-generating components, separating the thermal management function from the electrical connection function
Solution Approach 2:
The heat sink structure serves multiple functions: it provides thermal management for active cables, structural support for the module, and positioning alignment during insertion, eliminating the need for separate cooling mechanisms
2Temperature
If a heat sink is adapted to engage a module positioned in the upper port, then thermal management is improved, but the same solution cannot be applied to modules in the lower port
Solution Approach 1:
The heat sink is designed with an asymmetric profile featuring a ramp on one side and a pedestal on the other, allowing the leading edge to be protected during insertion while the trailing edge provides thermal interface, making it compatible with both upper and lower ports
Solution Approach 2:
The heat sink extends in multiple dimensions with vertical fins for heat dissipation, horizontal base for module contact, and stepped profiles (ramp and pedestal) that accommodate insertion from different orientations and positions
3Temperature
If directed air flow or thermally conductive spring fingers are used for thermal management, then cooling capability is improved, but cost and space usage increase
Solution Approach 1:
The heat sink combines thermal conduction through its base, convection through its fins, and structural support functions into a single integrated component, eliminating the need for separate air flow mechanisms or spring finger assemblies
Solution Approach 2:
The heat sink's finned structure passively facilitates heat dissipation through natural convection and radiation, requiring no active cooling systems, fans, or complex control mechanisms, thereby reducing cost and space requirements
4Temperature
If thermal interface material is exposed during module insertion, then thermal contact is improved, but the leading edge becomes vulnerable to engagement damage
Solution Approach 1:
The ramp and pedestal structure preliminarily guides the module during insertion, directing it along a controlled path that prevents the leading edge from contacting the thermal interface material before the module is properly positioned
Solution Approach 2:
The ramp and pedestal act as intermediary structures between the module and the thermal interface material, mediating the insertion process to prevent direct contact and potential damage to the interface material
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 solution effectively manages thermal energy generated by modules, providing efficient heat dissipation through convection and minimizing engagement risks during module insertion, thus addressing the thermal burden and space constraints in high-density environments.
Implementation Method 1
A thermal interface material is disposed on lower surface of the pedestal. Thermal energy generated by the module is transferred to the heat sink
Implementation Method 2
Thermal energy generated by the module is transferred to the heat sink which dissipates the heat by convection
Data Source
AI summary
A connector system includes a cage assembly in which a thermally conductive heat sink and a connector are mounted. The heat sink includes a base, a ramp extending downwardly from the base and a pedestal extending downwardly from the base. A thermal interface material is disposed on lower surface of the pedestal. A module can be inserted into the cage assembly and connected to the connector and to the heat sink. Thermal energy generated by the module is transferred to the heat sink which dissipates the heat by convention. The ramp protects a leading edge of the thermal interface material form engagement by the module during insertion of the module into the cage assembly.