Flexible Receptacle Connector for High-Speed Impedance Continuity
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Solution Overview
Problem
Existing receptacle connectors experience performance degradation at high speeds due to cross-talk between contacts and impedance discontinuities caused by changes in interfaces and geometries, leading to signal degradation.
Innovation Solution
A receptacle connector design featuring a flexible circuit and interposer contacts with separable interfaces, supported by a flexible circuit support, to ensure reliable electrical connections and minimize impedance discontinuities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If contacts are arranged in a row and held in the housing, then the connector structure is simple and easy to manufacture, but cross-talk between contacts occurs and impedance discontinuities arise at high speeds
Solution Approach 1:
The contact structure is segmented into multiple independent components: interposer contacts, flexible circuit contacts, and rigid circuit board contacts. Each segment is independently controlled and positioned, allowing optimization of signal integrity for each contact while maintaining overall structural simplicity through modular assembly.
Solution Approach 2:
Interposer contacts serve as intermediary elements between the flexible circuit and the rigid circuit board. These intermediaries provide impedance matching and reduce discontinuities by transitioning signals between different structural environments, thereby improving high-speed signal quality without complicating the overall connector architecture.
2Ease of manufacture
If contacts are held in housing with fixed interfaces, then manufacturing is straightforward, but impedance discontinuities occur due to interface changes and geometry variations
Solution Approach 1:
The flexible circuit provides dynamic adaptability in contact positioning and interface geometry. The flexible nature allows contacts to naturally conform to optimal positions during mating, reducing impedance discontinuities caused by rigid fixed interfaces while maintaining manufacturing simplicity through the flexible substrate's inherent compliance.
Solution Approach 2:
The connector design incorporates controlled parameter changes in contact geometry and positioning along the signal path. By carefully varying contact dimensions, spacing, and orientation parameters, impedance continuity is maintained across different interface regions while the overall structure remains manufacturable using standard processes.
3Strength
If rigid contacts are used for stable connection, then mechanical strength is high, but cross-talk increases and signal degradation occurs at high speeds
Solution Approach 1:
The flexible circuit uses thin film construction to create contacts that maintain mechanical stability through the substrate's inherent strength while allowing precise control of contact geometry and positioning. This flexible film approach reduces cross-talk by enabling better spacing and orientation control compared to rigid contacts, while maintaining adequate mechanical strength for reliable connection.
Data Source
AI summary
A receptacle connector includes a receptacle housing having a housing mounting end configured to be mounted to a host circuit board and a slot at a housing mating end configured to receive a mating end of a pluggable module. The receptacle housing includes contact pockets that receive interposer contacts. The receptacle connector includes a flexible circuit having circuit conductors extending between a mating end and a terminating end configured to be terminated to the host circuit board. Each interposer contact includes an inner mating interface forming a separable interface configured to be mated with module contacts of the pluggable module and an outer mating interface connected to the mating end of the corresponding circuit conductor.