Grounding Connector Structure for High-Speed Signal Integrity

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Solution Overview

Problem

Designing I/O connectors for high data rate applications is challenging due to non-ideal terminal placement causing signal interference, heat generation, electrostatic discharge, and crosstalk, which degrades signal integrity and requires advanced grounding solutions.

Innovation Solution

The connector assembly features advanced ground terminals positioned at connector corners, integrated into a digital ground structure, with static and dynamic configurations to minimize signal interference and provide electrostatic discharge protection, using commoning bars for enhanced grounding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional terminal placement is used in high data rate connectors, then device complexity is reduced, but signal integrity deteriorates due to interference, heat, and electrostatic discharge

Engineering Contradiction:

Improvesignal integrityVSAvoidgrounding structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The grounding structure is segmented into multiple independent ground terminals distributed at connector corners and along edges, each providing localized electrostatic discharge protection and shielding. This segmentation allows the grounding function to be distributed throughout the connector rather than concentrated, reducing signal interference while maintaining manageable complexity through modular placement

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Ground terminals are positioned to make contact during connector engagement before signal terminals, establishing electrostatic discharge paths and ground references in advance. This preliminary grounding action protects subsequent signal connections from interference, heat buildup, and electrostatic damage, improving signal integrity without requiring complex active control systems

Inventive Principle:

Principle #10Preliminary action

2Reliability

If ground terminals are positioned to provide shielding between differential pairs, then signal integrity is improved, but conductor density decreases

Engineering Contradiction:

Improvesignal integrityVSAvoidconductor density

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Ground terminals are strategically positioned at connector corners and along edges rather than uniformly distributed, providing localized shielding and electrostatic discharge protection at critical locations. This approach maintains high conductor density in signal areas while concentrating grounding resources where they provide maximum benefit for signal integrity

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The grounding structure utilizes three-dimensional space by extending ground terminals vertically above the differential pair plane and positioning them at connector perimeters. This vertical and peripheral placement provides effective shielding and ESD protection without occupying horizontal space that would reduce conductor density

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If advanced ground terminals extend above differential pairs, then electrostatic discharge protection is enhanced, but mechanical deflection upon contact increases

Engineering Contradiction:

Improveelectrostatic discharge protectionVSAvoidterminal contact stability

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

Ground terminals are designed with controlled flexibility, allowing them to deflect during connector engagement to ensure reliable contact. This dynamic behavior enables the extended terminals to make firm contact for electrostatic discharge protection while accommodating manufacturing tolerances and assembly variations, preventing excessive or damaging deflection

Inventive Principle:

Principle #15Dynamics

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 ensures improved signal integrity and electrostatic discharge protection by establishing grounding before signal connectivity, minimizing signal impact and enhancing connector performance in high data rate applications.

Implementation Method 1

at least a portion of the first set of advanced ground terminals and the second set of advanced ground terminals are conductively coupled to the commoning bar

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Implementation Method 2

The lower twisted portion comprises inwardly-bent members that pinch the commoning bar therebetween to form an interference connection between the body of the second set of advanced ground terminals and the commoning bar

Methodology Applied

Scientific EffectInterference connection: Interference

Implementation Method 3

The first set of advanced ground terminals includes a body having a hooked top contact portion and a lower twisted portion

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS20250337200A1Advanced grounding connector for enhanced signal integrity

Publication Date: 2025.10.30 MOLEX INC

AI summary

An input/output (I/O) connector without first-mate, last-break (FMLB) functionality is disclosed. The connector includes a housing having a wafer assembly that includes differential terminal pairs. The connector further includes a first set of ground terminals and a second set of ground terminals, the first set and the second set of ground terminals extending above a top-most end of the plurality of differential pairs. The first set of ground terminals can be configured to avoid deflection upon contact, and the second set of ground terminals can be configured to deflect upon contact.