Opto-Electric Hybrid Board Noise Suppression via Shield Layer Segmentation
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Solution Overview
Problem
Existing opto-electric hybrid boards fail to effectively suppress noise in wiring patterns, which is a critical requirement in modern applications.
Innovation Solution
The opto-electric hybrid board incorporates a metal supporting layer, an insulating base layer, conductive layers with an intermediate insulating layer, and at least one shield layer to electrically insulate and suppress noise among the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional opto-electric hybrid board structure is used, then the device complexity is low, but the noise suppression capability is insufficient
Solution Approach 1:
The electric circuit board is segmented into multiple functional layers including a metal supporting layer, insulating base layer, intermediate insulating layer, and multiple conductive layers. This segmentation allows each layer to serve specific functions (support, insulation, signal transmission, shielding) thereby achieving effective noise suppression through structured layering while maintaining manufacturing feasibility.
Solution Approach 2:
An intermediate insulating layer is introduced as a mediator between the optical waveguide and the conductive layers. This intermediate layer provides electrical insulation while allowing optical signals to pass through, effectively decoupling the electrical and optical subsystems and preventing noise interference from conductive layers to optical elements.
2Object-affected harmful factors
If the terminal is disposed on the intermediate insulating layer, then the noise suppression is improved, but the optical coupling distance increases causing higher optical coupling loss
Solution Approach 1:
The terminal is selectively positioned on the insulating base layer rather than the intermediate insulating layer, creating a local optimization where the optical coupling path is shortened at the critical mounting location. This local quality change reduces optical coupling loss while the overall multi-layer structure maintains noise suppression capabilities through the shield layer and intermediate insulating layer.
Solution Approach 2:
The terminal positioning utilizes the thickness direction dimensionality of the layered structure. By placing the terminal on the insulating base layer (first surface in thickness direction) rather than the intermediate insulating layer (second surface), the optical element can be mounted closer to the optical waveguide in the thickness direction, reducing coupling distance and loss.
3Adaptability or versatility
If multiple conductive layers are added for signal and power transmission, then the functionality is improved, but the noise interference between layers increases
Solution Approach 1:
A shield layer is extracted and positioned between the first and second conductive layers to separate and isolate the signal transmission path from power transmission paths. This extraction of a dedicated shielding function prevents noise interference between adjacent conductive layers while maintaining the ability to transmit both signals and power through the multi-layer structure.
Solution Approach 2:
The shield layer acts as an intermediary barrier between conductive layers carrying different types of electrical signals or power. This intermediary layer provides electrical insulation and electromagnetic shielding, preventing noise coupling between adjacent conductive layers while allowing the multi-layer structure to maintain high adaptability for various signal and power transmission requirements.
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 significantly reduces noise levels, allows for shorter optical coupling distances between optical elements and waveguides, and enables simultaneous transmission of signals and electricity while maintaining effective noise suppression.
Implementation Method 1
at least one layer selected from the group consisting of the metal supporting layer and the conductive layers is a shield layer electrically insulated from the other layers of the group
Data Source
AI summary
An opto-electric hybrid board that sequentially includes an optical waveguide and an electric circuit board toward one side in a thickness direction. The electric circuit board includes a metal supporting layer, an insulating base layer disposed on a one-side surface in the thickness direction of the metal supporting layer, a plurality of conductive layers sequentially disposed at one side in the thickness direction, and an intermediate insulating layer disposed between the conductive layers. At least one layer selected from the group consisting of the metal supporting layer and the conductive layers is electrically insulated from the other layers.