Staggered Press-Fit Fish-Eye Connector for PCIe5 Signal Integrity
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Solution Overview
Problem
In information handling systems, the uniform length of press-fit fish-eye connectors can lead to signal reflections and stub formation, which hinder the use of high-speed signal protocols like PCIe5 due to increased susceptibility to cross-talk and signal integrity issues.
Innovation Solution
A staggered press-fit fish-eye connector design is introduced, where ground connectors are substantially longer than signal connectors, with signal connectors positioned between ground connectors, allowing for reduced via plating and shorter stub lengths, enhancing mechanical strength and signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform length press-fit fish-eye connectors are used, then manufacturing is simpler, but signal integrity deteriorates due to reflections and stub formation
Solution Approach 1:
The patent applies asymmetry by configuring ground connectors to be longer than signal connectors, creating an asymmetric connector arrangement. This asymmetric design allows ground connectors to provide extended shielding and grounding while signal connectors maintain shorter lengths to reduce stub effects and signal reflections, thereby improving signal integrity without compromising manufacturing feasibility
Solution Approach 2:
The patent applies local quality by differentiating connector lengths based on their specific functions: ground connectors are made substantially longer to optimize grounding and shielding performance, while signal connectors are made shorter to minimize stub formation and signal reflections. This localized optimization of connector lengths according to their specific functional requirements resolves the contradiction between manufacturing simplicity and signal integrity
2Reliability
If longer ground connectors are used, then shielding and grounding improve, but device complexity increases
Solution Approach 1:
The asymmetric connector configuration with longer ground connectors and shorter signal connectors improves shielding and grounding performance while maintaining a relatively simple overall structure. The asymmetry is deliberately designed to optimize electromagnetic compatibility without requiring complex additional components or configurations
Solution Approach 2:
The staggered connector design serves multiple functions: the longer ground connectors provide both grounding and shielding functions, while the shorter signal connectors provide signal transmission with minimized stub effects. This multi-functionality approach allows the connector system to achieve improved shielding and grounding without proportionally increasing device complexity
3Reliability
If shorter signal connectors are used, then stub length is reduced improving signal integrity, but mechanical strength may be compromised
Solution Approach 1:
The asymmetric connector design with shorter signal connectors reduces stub length and improves signal integrity. The mechanical strength is maintained through the overall connector assembly design, where the longer ground connectors provide structural support and the fish-eye configuration ensures proper retention in the PCB, compensating for the reduced length of signal connectors
Data Source
AI summary
A staggered press-fit fish-eye connector for an information handling system includes multiple ground press-fit connectors and multiple signal press-fit connectors. The ground press-fit connectors include first, second, and third ground press-fit connectors. The signal press-fit connectors include first, second, third and fourth signal press-fit connectors. The ground press-fit connectors are substantially longer than the signal press-fit connectors. The first and second signal press-fit connectors are located between the first and second ground press-fit connectors, and the third and fourth signal press-fit connectors are located between the second and third ground press-fit connectors.