Rigid-Flex Port Connector Layout for Lower Network Signal Loss

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Solution Overview

Problem

Conventional mechanisms for connecting processors to port connectors in network devices exhibit poor signal loss behavior.

Innovation Solution

The use of a rigid-flex circuit with a first and second rigid portion and a flexible portion joined between them, mounted on opposite sides of a printed circuit board, to communicatively couple integrated circuits to port connectors, reducing signal loss and improving signal integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional connection mechanisms are used to connect processors to port connectors, then device complexity is reduced, but signal loss increases

Engineering Contradiction:
Improvesignal lossVSAvoidconnection mechanism complexity
Core Design Contradiction:
Loss of energyVSDevice complexity

Solution Approach 1:

The patent introduces a rigid-flex circuit that extends in multiple dimensions from the printed circuit board, with rigid portions mounted on opposite sides and flexible portions connecting them. This multi-dimensional configuration creates optimized signal paths that reduce signal loss while maintaining manageable device complexity through structured spatial arrangement.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent employs a composite rigid-flex circuit structure combining rigid portions (for stable mounting on the printed circuit board) and flexible portions (for optimized signal transmission paths). This composite approach allows the connection mechanism to simultaneously achieve low signal loss and controlled complexity through material and structural differentiation.

Inventive Principle:
Principle #40Composite materials

2Reliability

If rigid-flex circuit with multiple portions is used to couple integrated circuits to port connectors, then signal integrity is improved, but device complexity increases

Engineering Contradiction:
Improvesignal integrityVSAvoidcircuit structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The rigid-flex circuit is segmented into distinct rigid portions and flexible portions, each serving specific functions. The rigid portions provide stable mounting surfaces on opposite sides of the printed circuit board, while the flexible portions provide optimized signal transmission paths, thereby improving signal integrity through functional segmentation.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The rigid-flex circuit structure is nested within the device architecture, with rigid portions mounted on the printed circuit board and flexible portions extending between them. This nested configuration integrates the complex multi-part structure into the existing device layout, improving signal integrity while containing the complexity within a compact hierarchical arrangement.

Inventive Principle:
Principle #7Nested doll (Nesting)

Data Source

PatentUS20250253558A1Network device having port connections with reduced signal loss
Publication Date: 2025.08.07 ARISTA NETWORKS INC
  • US20250253558A1 patent drawing
  • US20250253558A1 patent drawing
  • US20250253558A1 patent drawing

AI summary

A network device or a system can include a printed circuit board, an integrated circuit mounted on a first side of the printed circuit board, a rigid-flex circuit having a first rigid portion, a second rigid portion, and a flexible portion joined between the first and second rigid portions, and port connectors mounted on the second rigid portion of the rigid-flex circuit. The first rigid portion of the rigid-flex circuit can be disposed on a second side, opposing the first side, of the printed circuit board. The rigid-flex circuit is configured to communicatively couple the integrated circuit to the port connectors. The network device can include alignment structures for positioning the printed circuit board and the rigid-flex circuit within a housing of the device.