Thermal Module Fastener Isolating Grounding Loops in Blade Servers
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Solution Overview
Problem
In blade servers, particularly those with dual-CPU architecture, installing a thermal module is complicated due to the heavy weight causing motherboard deformation, and there is a need to maintain electrical insulation between the thermal module and the metal face panel to prevent interference between digital and analog grounding signals.
Innovation Solution
A thermal module fastener system comprising a cushion member between the metal face panel and motherboard, an elastically compressible and electrically insulative spacer member between the motherboard and thermal module, a lock member to secure the motherboard to the metal face panel, and a spring member to maintain contact with the chip, ensuring electrical isolation and structural reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a thermal module is directly mounted on the motherboard, then heat dissipation is achieved, but the motherboard deforms or breaks due to the heavy gravity weight of the thermal module
Solution Approach 1:
The patent introduces a metal face panel as an intermediary component between the thermal module and the motherboard. The face panel is fastened to the motherboard using multiple fasteners distributed across its surface, thereby transferring the thermal module's weight to the face panel rather than directly to the motherboard. This mediator structure prevents motherboard deformation while enabling effective heat dissipation through the thermal module.
2Stability of the object's composition
If the thermal module is secured to the metal face panel, then structural stability is improved, but electrical insulation between digital and analog grounding must be maintained to prevent signal interference
Solution Approach 1:
The patent segments the grounding paths by introducing electrically insulative spacers at critical interfaces. The spacers are placed between the metal face panel and the motherboard, and between the thermal module and the face panel, creating separate digital and analog grounding loops. This segmentation prevents signal interference while maintaining the structural stability provided by the face panel assembly.
Solution Approach 2:
Electrically insulative spacers serve as intermediaries that maintain both mechanical connection and electrical isolation. These spacers are positioned at strategic locations where electrical insulation is required, allowing the thermal module assembly to remain structurally stable while preventing harmful electrical interference between digital and analog grounding circuits.
3Reliability
If multiple components are used to secure the thermal module and maintain insulation, then electrical isolation and structural reinforcement are achieved, but the installation process becomes complicated
Solution Approach 1:
The patent combines multiple functions into integrated components. The metal face panel serves both as a structural reinforcement element and as a mounting surface for the thermal module. The fasteners simultaneously secure the face panel to the motherboard and provide mounting points for the thermal module. This merging of functions reduces installation complexity while maintaining the required electrical isolation and structural reinforcement through the coordinated use of spacers and the integrated face panel assembly.
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 system effectively secures the thermal module to the motherboard, prevents motherboard deformation, maintains electrical insulation, and adjusts tightness to prevent signal interference by isolating digital and analog grounding loops, ensuring reliable heat dissipation and structural integrity.
Implementation Method 1
a spring member mounted on the locating member to keep the thermal module in close contact with a chip at the motherboard
Implementation Method 2
the spacer member is elastically compressible and electrically insulative, therefore the spacer member automatically adjusts the tightness between the thermal module and the chip at the motherboard
Implementation Method 3
keeping the thermal module electrically insolated from the metal face panel and in close contact with a chip at the motherboard for quick dissipation of heat
Data Source
AI summary
A fastener used in a blade server to secure a thermal module and a motherboard to a metal face panel, including a cushion member set between the metal face panel and the motherboard, an elastically compressible and electrically insulative spacer member set between the motherboard and the thermal module, a lock member fastened to the cushion member and the spacer member to lock the motherboard to the metal face panel, a locating member fastening the thermal module to the spacer member, and a spring member mounted on the locating member to keep the thermal module in close contact with a chip at the motherboard. The spacer member automatically adjusts the tightness between the thermal module and the chip at the motherboard, and isolates the digital grounding loop formed in the locating member and the thermal module from the analog grounding loop formed in the lock member and the metal face panel.