Contact Assembly Ground Structure for High-Speed Signal Shielding
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Solution Overview
Problem
Existing electrical connectors face insufficient electrical shielding as signal speeds increase, necessitating an improved ground structure to reduce cross-talk and enhance electrical performance.
Innovation Solution
The introduction of a contact assembly with an array of signal and ground contacts, where ground contacts are interspersed between signal contacts to provide shielding, along with a ground shield assembly that includes compressible connective elements and an anisotropic conductive film, which are electrically connected to the ground contacts to enhance shielding and reduce cross-talk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ground contacts are used without additional shielding structures, then the device complexity is low, but the electrical shielding effectiveness deteriorates at high signal speeds
Solution Approach 1:
The ground shield assembly is segmented into multiple ground contacts interspersed between signal contacts, with each ground contact providing localized shielding. The ground connective elements are also segmented into discrete compressible units that independently establish electrical connections, allowing the shielding structure to be divided into functional segments that work collectively to reduce cross-talk at high signal speeds
Solution Approach 2:
Compressible ground connective elements serve as intermediaries between the ground shield and ground contacts, providing flexible electrical connection. These intermediary elements accommodate variations in contact pressure and positioning while maintaining reliable electrical continuity, thereby enhancing shielding effectiveness without requiring rigid, complex structural arrangements
2Reliability
If ground contacts are interspersed between signal contacts to provide shielding, then electrical shielding is improved, but the device complexity increases due to additional ground connective elements
Solution Approach 1:
The ground shield, ground connective elements, and ground contacts are merged into a single integrated ground shield assembly. This consolidation combines multiple previously separate components into one unified structure that functions as a complete shielding system, reducing the number of discrete parts to be handled and assembled while maintaining all necessary shielding functions
Solution Approach 2:
The ground shield assembly serves multiple functions simultaneously: it provides electrical shielding between signal contacts, establishes electrical connections through compressible connective elements, and maintains mechanical positioning of ground contacts. This multi-functionality reduces the need for separate dedicated components for each function, thereby reducing overall device complexity
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
This configuration provides improved electrical shielding, reducing cross-talk and enhancing the overall electrical performance of the connector, particularly at high signal speeds exceeding 10 Gbps.
Implementation Method 1
an anisotropic conductive film between the ground shield and the ground contacts. The anisotropic conductive film forms ground connective elements. The ground connective elements electrically connected to the ground shield
Implementation Method 2
The ground connective elements are compressible
Data Source
AI summary
A contact assembly for an electrical connector signal contacts arranged in pairs and ground contacts are interspersed with the pairs of the signal contacts. Each signal contact includes a signal contact body having first and second sides extending between a signal mating end and a signal terminating end. Each ground contact includes a ground contact body having first and second sides extending between a ground mating end and a ground terminating end. The contact assembly includes a ground shield assembly including a ground shield spanning across the contacts and ground connective elements electrically connected to the ground shield and the corresponding ground contacts. The ground connective elements are compressible.