Multilayered Substrate Layout for Low-Loss Signal Transmission
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Solution Overview
Problem
Multilayered substrates face a trade-off between achieving high-frequency characteristics and mechanical and structural strength, as materials that satisfy both requirements are limited, often requiring a compromise in one aspect over the other.
Innovation Solution
A multilayered substrate configuration with specific laminated insulating layers, where a first insulating layer with a signal conductor is in contact with a second insulating layer having lower dielectric loss and a third insulating layer with higher close contact, enhancing mechanical resistance to bending while maintaining low dielectric loss for high-frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If materials with high dielectric loss are used to ensure close contact between insulating layers, then mechanical and structural strength is improved, but high-frequency characteristics deteriorate
Solution Approach 1:
The patent applies local quality by assigning different material properties to different insulating layers based on their functional requirements. The second insulating layer (in contact with signal conductor) uses low dielectric loss material for high-frequency performance, while the third insulating layer (providing mechanical support) uses high dielectric loss material for close contact and structural strength. This localized differentiation resolves the contradiction by matching material properties to specific functional zones within the multilayered substrate.
Solution Approach 2:
The patent employs composite materials by combining multiple insulating layers with different dielectric loss characteristics in a single substrate structure. This composite approach allows the substrate to simultaneously exhibit low dielectric loss (from the second layer) for high-frequency signal transmission and high mechanical strength (from the third layer) for structural integrity, thereby resolving the trade-off between these conflicting requirements.
2Loss of energy
If materials with low dielectric loss are used to improve high-frequency characteristics, then transmission loss is reduced, but mechanical and structural strength deteriorates
Solution Approach 1:
The patent applies local quality by assigning different material properties to different insulating layers based on their functional requirements. The second insulating layer (in contact with signal conductor) uses low dielectric loss material for high-frequency performance, while the third insulating layer (providing mechanical support) uses high dielectric loss material for close contact and structural strength. This localized differentiation resolves the contradiction by matching material properties to specific functional zones within the multilayered substrate.
Solution Approach 2:
The patent employs composite materials by combining multiple insulating layers with different dielectric loss characteristics in a single substrate structure. This composite approach allows the substrate to simultaneously exhibit low dielectric loss (from the second layer) for high-frequency signal transmission and high mechanical strength (from the third layer) for structural integrity, thereby resolving the trade-off between these conflicting requirements.
3Loss of energy
If insulating layers are positioned away from the center in lamination direction to improve high-frequency characteristics, then dielectric loss is reduced, but mechanical resistance to bending deteriorates
Solution Approach 1:
The patent applies local quality by assigning different material properties to different insulating layers based on their functional requirements. The second insulating layer (in contact with signal conductor) uses low dielectric loss material for high-frequency performance, while the third insulating layer (providing mechanical support) uses high dielectric loss material for close contact and structural strength. This localized differentiation resolves the contradiction by matching material properties to specific functional zones within the multilayered substrate.
Solution Approach 2:
The patent employs composite materials by combining multiple insulating layers with different dielectric loss characteristics in a single substrate structure. This composite approach allows the substrate to simultaneously exhibit low dielectric loss (from the second layer) for high-frequency signal transmission and high mechanical strength (from the third layer) for structural integrity, thereby resolving the trade-off between these conflicting requirements.
Data Source
AI summary
A multilayered substrate includes first, second, and third insulating layers, and a transmission line. The first insulating layer includes first and second surfaces opposite to each other. A signal conductor of the transmission line is on the first surface of the first insulating layer. The second insulating layer is in contact with the first surface of the first insulating layer. The third insulating layer is in contact with the second surface of the first insulating layer. A dielectric loss of the second insulating layer is lower than a dielectric loss of the third insulating layer. A degree of close contact between the first insulating layer and the third insulating layer is higher than a degree of close contact between the first insulating layer and the second insulating layer.