Circuit Board Unit Ground Layer Coupling for Noise Suppression
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Solution Overview
Problem
Existing board-to-board connectors face challenges in effectively suppressing unwanted radiation noise, particularly high-frequency electromagnetic noise, as enhancing GND patterns alone is insufficient.
Innovation Solution
A circuit board unit is designed with a first and second circuit board, each having ground layers, and a metal member positioned between them to electrically couple the ground layers, with the metal member adjacent to the connector unit, facilitating a return path for currents and stabilizing ground potentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If GND patterns of circuit boards are enhanced to suppress radiation noise, then electromagnetic noise suppression is improved, but the suppression effectiveness is insufficient
Solution Approach 1:
A metal member is introduced as an intermediary component between the first and second circuit boards. This metal member includes a first ground electrode connected to the first GND pattern and a second ground electrode connected to the second GND pattern, creating an additional ground connection path that enhances electromagnetic noise suppression beyond what the GND patterns alone can achieve
Solution Approach 2:
The solution transitions from a two-dimensional GND pattern enhancement approach to a three-dimensional structure by adding the metal member that extends vertically between the circuit boards. This adds a new spatial dimension for ground connection, creating multiple ground paths that improve noise suppression effectiveness
2Object-affected harmful factors
If a metal member is added to electrically couple ground layers, then electromagnetic field cancellation is improved, but device complexity increases
Solution Approach 1:
The metal member serves multiple functions simultaneously: it acts as a ground connection path, provides electromagnetic shielding, and establishes electrical coupling between the ground layers of both circuit boards. This multi-functionality reduces the need for separate components for each function
Solution Approach 2:
The first and second ground electrodes of the metal member are merged with the respective GND patterns of the circuit boards through direct connection or conductive adhesive, creating an integrated ground system that simplifies the overall structure while maintaining effective electromagnetic field cancellation
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 configuration effectively cancels out electromagnetic fields, reduces unwanted radiation noise, and stabilizes ground potentials, improving signal quality while simplifying the circuit board design and reducing manufacturing costs.
Implementation Method 1
a metal member arranged between the first circuit board and the second circuit board, and configured to electrically couple the first ground layer and the second ground layer to each other
Implementation Method 2
This configuration effectively cancels out electromagnetic fields, reduces unwanted radiation noise
Data Source
AI summary
A circuit board unit includes a first circuit board having a first ground layer, a second circuit board having a second ground layer and arranged so as to be opposed to the first circuit board, a connector unit having a first connector attached to the first circuit board, and a second connector attached to the second circuit board and coupled to the first connector, and a metal member arranged between the first circuit board and the second circuit board, and configured to electrically couple the first ground layer and the second ground layer to each other. The metal member is arranged so as to be adjacent to the connector unit.