Impedance-Control Plated Electrical Contacts for Signal Integrity
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Solution Overview
Problem
Existing electrical connectors face challenges in maintaining impedance matching at the mating interface, which is crucial for minimizing return loss and ensuring signal integrity, especially in high-speed communication systems, due to manufacturing constraints and cost considerations.
Innovation Solution
The use of electrical contacts with an elongated body featuring a base material plated with an impedance-control material of higher relative magnetic permeability, specifically along designated portions such as the mating segment, to increase impedance and improve signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of signal contacts is decreased or spacing between signal contacts is increased to increase impedance at the mating interface, then impedance matching is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies local quality by plating only specific portions of the electrical contacts with impedance-control material having higher relative magnetic permeability. The plating is applied selectively to mating segments where impedance control is needed, rather than uniformly across entire contacts, thus achieving impedance matching without requiring complex changes to signal contact size or spacing throughout the entire connector assembly.
Solution Approach 2:
The patent changes the magnetic permeability parameter of the contact surface by applying impedance-control material plating. This material parameter change directly increases the impedance at the mating interface without requiring geometric changes to the signal contacts, thereby simplifying the overall device configuration while achieving the desired impedance matching.
2Ease of manufacture
If conventional materials are used in electrical contacts, then manufacturing cost is reduced, but impedance control capability is insufficient
Solution Approach 1:
The patent uses composite materials by combining conventional base materials (such as copper or copper alloys) with impedance-control material plating (such as nickel, cobalt, or ferrite coatings). This composite structure maintains the excellent electrical conductivity of the base material while adding the high magnetic permeability of the plating layer, achieving both cost-effectiveness and superior impedance control capability.
Solution Approach 2:
The patent applies impedance-control material plating only to specific mating segments of the electrical contacts rather than using expensive high-permeability materials throughout the entire contact structure. This localized application reduces material costs while providing impedance control exactly where it is needed at the mating interface.
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 approach effectively enhances impedance control at the mating interface, reducing return loss and maintaining signal integrity in high-speed communication systems, as demonstrated by improved differential impedance and return loss performance compared to conventional connectors.
Implementation Method 1
The impedance-control material has a relative magnetic permeability that is greater than a relative magnetic permeability of the base material. The impedance-control material increases the impedance of the electrical contact along the designated portion.
Data Source
AI summary
Electrical connector includes a connector body and a plurality of electrical contacts coupled to the connector body. Each of the electrical contacts has an elongated body that includes a base material and an impedance-control material plated over the base material. The impedance-control material extends along only a designated portion of the elongated body. The impedance-control material has a relative magnetic permeability that is greater than a relative magnetic permeability of the base material. The impedance-control material increasing an impedance of the electrical contact along the designated portion.