Connector Assembly Shield Grounding for Resonance Prevention
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Solution Overview
Problem
The existing connector assemblies for FFCs, such as those described in Patent Document 1, face challenges in preventing resonance caused by multiple reflections due to complex manufacturing processes, leading to increased costs.
Innovation Solution
A connector assembly is designed with a microstrip or strip transmission line configuration that omits ground lines and connects the shield layer with a mating ground terminal of a mating connector, preventing resonance through direct contact between the shield layer and ground terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground lines are connected via conductive adhesive layer and shield layer, then resonance is prevented, but manufacturing process becomes complicated and cost increases
Solution Approach 1:
The patent extracts and eliminates the conductive adhesive layer from the grounding structure, keeping only the essential shield layer and ground line connections. This simplifies the manufacturing process while maintaining the resonance prevention function through direct shield-to-ground-terminal contact.
Solution Approach 2:
Instead of connecting ground lines through multiple intermediate layers (conductive adhesive + shield), the patent inverts the approach by making the shield layer itself the primary grounding element that directly contacts the mating ground terminal, thereby simplifying the connection path.
2Reliability
If ground lines are connected via conductive adhesive layer and shield layer, then resonance is prevented, but manufacturing cost increases
Solution Approach 1:
The patent removes the conductive adhesive layer from the grounding structure, eliminating the need to source, apply, and cure this additional material. This reduction in material usage and processing steps directly lowers manufacturing cost while preserving the essential grounding function.
Solution Approach 2:
The patent discards the conductive adhesive layer that adds complexity and cost without providing essential functional benefit, as the shield layer alone suffices for grounding when properly configured to contact the mating ground terminal.
3Reliability
If multiple ground lines and shield layers are used, then resonance prevention is achieved, but device structure becomes complex
Solution Approach 1:
The patent extracts and eliminates unnecessary intermediate grounding layers, retaining only the essential shield layer that directly contacts the ground terminal. This reduces structural complexity while maintaining effective grounding for resonance prevention.
Solution Approach 2:
The patent merges the grounding function into the shield layer itself, which directly contacts the mating ground terminal. This consolidation eliminates separate conductive adhesive layers and simplifies the overall grounding structure while maintaining effectiveness.
Data Source
AI summary
A connector assembly comprises a connector and a mating connector. The connector is attachable with a connecting object having a sheet-like shape. The connecting object has a wiring layer, a conductive layer and an insulator. The wiring layer includes at least one trace. The trace has a first contact portion. The conductive layer has at least two second contact portions. The connector is mateable with the mating connector along a first direction. The mating connector comprises at least one mating first terminal and at least two mating second terminals. Under a mated state where the connector in the attached state is mated with the mating connector, the first contact portion is positioned between two of the mating second terminals in a second direction perpendicular to the first direction. The second contact portions are brought into contact with the mating second terminals, respectively, under the mated state.