Wafer Connector Shielding With Ferrules for High-Speed Signal Integrity
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Solution Overview
Problem
Conventional electrical connectors face challenges in providing sufficient electrical shielding for high-speed applications, leading to signal integrity issues at interfaces between cables and signal conductors.
Innovation Solution
The implementation of a connector assembly with wafer assemblies that include leadframes, ground frames, and ferrules, where ferrules are soldered to cable shields and ground frames to provide comprehensive electrical shielding, and a housing with a mating interface for direct plug communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional shielding is used in electrical connectors, then the connector design becomes simpler, but signal integrity deteriorates at high data rates
Solution Approach 1:
The shielding structure is segmented into multiple components: cable shields at each cable end, ferrules that surround signal conductors, ground frames that provide lateral shielding, and ground planes on the wafer. Each segment provides shielding at a specific location, collectively achieving comprehensive 360-degree protection for high-speed signals throughout their path from cable to connector.
2Reliability
If shielding is added to electrical connectors, then signal integrity improves, but device complexity increases
Solution Approach 1:
Multiple shielding functions are merged into an integrated structure. The ground frames are coupled to the wafer body and extend to provide both lateral shielding and connection to ground planes. Ferrules are terminated to both cable shields and ground frames, merging cable-end shielding with connector shielding into a continuous protective structure.
Solution Approach 2:
The shielding structures are nested within each other to provide layered protection. Ferrules are positioned within the cavity and surrounded by ground frames, which are in turn connected to ground planes on the wafer. This nested arrangement creates multiple concentric shielding layers that progressively protect signals from external interference.
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
Enhances signal integrity by providing 360° shielding along signal paths, maintaining signal quality in high-speed data transmission.
Implementation Method 1
Each ferrule has a solder layer inside the ferrule soldered to the cable shield of the corresponding cable. The ferrules are terminated to the corresponding first termination tabs of the first ground frame and the corresponding second termination tabs of the second ground frame to electrically connect the ferrules to the first and second ground frames.
Implementation Method 2
The wafer assembly includes a first ground frame coupled to the first side of the wafer body to provide electrical shielding for the leadframe. The first ground frame includes first ground shields providing shielding for the mating ends of the corresponding signal contacts.
Data Source
AI summary
An electrical connector assembly includes a housing having a mating interface configured to be mated with a mating electrical connector assembly. Wafer assemblies are received in a cavity of the housing arranged in a wafer stack. Each wafer assembly includes a leadframe, a wafer body holding the leadframe, cables coupled to the leadframe, a ground frames coupled to the wafer body to provide electrical shielding for the leadframe, and ferrules surrounding the ends of the cables and electrically connected to the ground frames. Each ferrule has a solder layer along an interior of the ferrule coupled to a cable shield. Each ferrule includes shield connecting elements terminated to the ground frames to electrically connect the ferrule to the ground frames.