Card Edge Connector Inserting Member for Impedance and Grounding
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Solution Overview
Problem
Existing card edge connectors face challenges with high inductive impedance due to large terminal sizes and dielectric constant issues, particularly in high-speed connectors like PCIe 6.0, which are not adequately addressed by existing insulating inserting members.
Innovation Solution
An electrical connector design featuring an insulating housing with signal and grounding passageways, and a one-piece inserting member with insulating and conductive portions that reduce dielectric constant and adjust impedance by establishing grounding paths through conductive inserting portions contacting grounding terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If large-sized terminals are used for assembling signal terminals and grounding terminals, then the terminals can be easily assembled, but the dielectric constant around signal terminals decreases
Solution Approach 1:
The inserting member introduces localized dielectric material with different properties into specific regions around the terminals. This creates local quality changes in the dielectric constant without requiring changes to the terminal structures themselves, thus maintaining ease of assembly while improving signal integrity
Solution Approach 2:
The inserting member is constructed as a composite structure combining insulating housing material with integrated inserting portions. This composite design allows optimization of dielectric properties in specific areas while maintaining the overall structural integrity and assembly simplicity of the connector
2Quantity of substance
If long and thin signal terminals are used, then the connector can accommodate more terminals, but the inductive impedance of the signal terminals increases
Solution Approach 1:
The inserting member provides localized dielectric support and spacing around each signal terminal. This local quality enhancement reduces the inductive impedance by optimizing the electromagnetic field distribution around each terminal, allowing long and thin terminals to be used without compromising signal quality
Solution Approach 2:
The inserting member acts as an intermediary element between the terminals and the housing. It mediates the electromagnetic interactions by providing controlled dielectric properties, thereby reducing inductive impedance effects while enabling higher terminal density
Data Source
AI summary
An electrical connector includes: an insulating housing defining a mating face, a card slot, and two side walls at opposite sides of the card slot, each of the side walls defining signal passageways and grounding passageways; two rows of terminals located on the side walls and each row of terminal including signal terminals in the signal passageways and grounding terminals in the grounding passageways, the terminals including retaining portions retained in the passageways and elastic arms with contacting portions extending into the card slot; and a one-piece inserting member assembled in the insulating housing, wherein the inserting member defines plural first inserting portions inserted in the signal passageways and plural second inserting portions inserted in the grounding passageways, the second inserting portions contact corresponding grounding terminals, respectively, to establish a grounding path.