Flexible Circuit Board Grounding Layer for Crosstalk Reduction
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Solution Overview
Problem
Electrical connection devices face challenges with crosstalk due to dense signal terminals and poor coplanarity when using surface-mount technology, especially when connecting to circuit boards, as conventional methods either limit crosstalk reduction or compromise flexibility and design freedom.
Innovation Solution
The electrical connection device employs a flexible circuit board with an inherent grounding layer and conductive blocks that connect to the substrate through conductive traces, providing better shielding and coplanarity, allowing for reduced crosstalk and improved reliability across multiple connector stacks without compromising design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If grounding terminals are interposed between signal terminals to reduce crosstalk, then crosstalk is reduced, but the solution is limited when multiple receptacle units are stacked and signal terminals become longer
Solution Approach 1:
The invention divides the grounding function into multiple segments by providing grounding terminals in each receptacle unit rather than relying on a single grounding structure. This segmentation allows each unit to independently manage crosstalk, maintaining effectiveness even when units are stacked and signal paths become longer.
Solution Approach 2:
The invention transitions from a two-dimensional planar grounding approach to a three-dimensional stacked architecture with grounding terminals distributed across multiple levels. This dimensional change enables effective crosstalk reduction in vertically stacked configurations where signal terminals extend across multiple receptacle units.
2Reliability
If pin-shaped terminal tails are inserted into vias on the circuit board, then connection is achieved, but the circuit board flexibility and design freedom are reduced
Solution Approach 1:
The invention separates the connection function into modular receptacle units that can be independently configured. Each unit provides reliable electrical connection through its terminal structures, while the overall system maintains design flexibility by allowing selective stacking and arrangement of these modular units on the circuit board.
Solution Approach 2:
The invention enables dynamic configuration of the electrical connection device by allowing receptacle units to be stacked in different arrangements and configurations. This dynamic adaptability permits the circuit board design to be optimized for different applications without compromising connection reliability, as the same modular units can be arranged to suit various spatial and electrical requirements.
3Adaptability or versatility
If surface-mount technology is used to engage terminals with the circuit board to avoid vias, then circuit board flexibility is improved, but coplanarity of multiple terminals deteriorates
Solution Approach 1:
The invention incorporates preliminary positioning features and support structures within each receptacle unit that pre-establish proper terminal alignment and coplanarity before the surface-mount bonding process. This preliminary action ensures that terminals maintain precise spatial relationships during mounting, achieving both circuit board flexibility and manufacturing precision.
Solution Approach 2:
The invention introduces intermediary support structures and positioning elements within the receptacle units that mediate between the circuit board surface and the terminals. These intermediaries compensate for surface irregularities and ensure terminal coplanarity is maintained during surface-mount technology bonding, enabling both flexibility and precision.
4Productivity
If multiple receptacle units are stacked to increase transmission capacity, then data transmission capability is improved, but signal terminal length increases and crosstalk reduction effectiveness deteriorates
Solution Approach 1:
The invention segments the grounding function to each individual receptacle unit, providing localized crosstalk suppression at each stacking level. This segmentation ensures that increasing the number of stacked units for higher data transmission capacity does not compromise crosstalk reduction effectiveness, as each unit independently manages its own electromagnetic interference.
Solution Approach 2:
The invention addresses the crosstalk issue in three-dimensional stacked configurations by strategically positioning grounding terminals within each receptacle unit to account for vertical electromagnetic field interactions. This dimensional approach maintains effective crosstalk reduction even as units are stacked to increase data transmission capacity.
Data Source
AI summary
The present disclosure relates to an electrical connection apparatus provided on a substrate, comprising a base, a flexible circuit board, two connectors, and a fixing member. The flexible circuit board has a mating portion with a plurality of soldering pads; a mounting portion with a plurality of conductive blocks; and a plurality of conductive traces connecting the plurality of pads and the plurality of conductive blocks. The two connectors each have an insulative housing and a terminal. Each terminal has a soldering portion connected to the soldering pad. The substrate has a plurality of soldering pads connecting the conductive blocks. The fixing member fixes the base to the substrate. The present disclosure utilizes a ground layer of the flexible circuit board to reduce a signal crosstalk between the conductive traces, and utilizes the conductive blocks to connect the flexible circuit board and the substrate to improve coplanarity.