Flexible Substrate Resin Layer Elastic Moduli Curvature Adaptation
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Solution Overview
Problem
Flexible substrates with uniform electrical elements attached to curved surfaces face issues with uneven optical characteristics and light reception due to varying elongation rates and opening sizes, caused by inconsistent elastic moduli and film thicknesses across different areas.
Innovation Solution
The flexible substrate features a resin layer with varying elastic moduli and film thicknesses in different areas, adjusted according to the curvature of the surface, allowing for uniform deformation and reduced variations in opening sizes and electrical element density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible substrate with uniform electrical elements is attached to a curved surface, then the substrate can be applied to various surfaces, but uneven optical characteristics and light reception occur due to varying elongation rates and opening sizes
Solution Approach 1:
The resin layer is designed with spatially varying properties: the film thickness and elastic modulus differ between the first area (higher curvature) and second area (lower curvature). This local differentiation allows each region to deform appropriately to its local curvature, maintaining uniform opening sizes and electrical element densities across the entire curved surface.
Solution Approach 2:
The patent changes physical parameters of the resin layer (film thickness and elastic modulus) according to the curvature requirements of different areas. By adjusting these parameters, the substrate achieves uniform deformation characteristics across surfaces with varying curvatures, ensuring consistent optical characteristics and light reception.
2Ease of manufacture
If the resin layer has uniform elastic modulus and film thickness, then the manufacturing process is simplified, but variations in opening sizes and electrical element density occur due to inconsistent deformation
Solution Approach 1:
The resin layer is designed with spatially varying properties: the film thickness and elastic modulus differ between the first area (higher curvature) and second area (lower curvature). This local differentiation allows each region to deform appropriately to its local curvature, maintaining uniform opening sizes and electrical element densities across the entire curved surface.
Solution Approach 2:
The patent changes physical parameters of the resin layer (film thickness and elastic modulus) according to the curvature requirements of different areas. By adjusting these parameters, the substrate achieves uniform deformation characteristics across surfaces with varying curvatures, ensuring consistent optical characteristics and light reception.
3Strength
If the resin layer has higher elastic modulus for strength, then mechanical strength is improved, but flexibility and ability to conform to curved surfaces is reduced
Solution Approach 1:
The resin layer is designed with spatially varying properties: the film thickness and elastic modulus differ between the first area (higher curvature) and second area (lower curvature). This local differentiation allows each region to deform appropriately to its local curvature, maintaining uniform opening sizes and electrical element densities across the entire curved surface.
Solution Approach 2:
The patent changes physical parameters of the resin layer (film thickness and elastic modulus) according to the curvature requirements of different areas. By adjusting these parameters, the substrate achieves uniform deformation characteristics across surfaces with varying curvatures, ensuring consistent optical characteristics and light reception.
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 ensures consistent optical characteristics and light reception by adjusting the elastic moduli and film thicknesses of the resin layer to match the surface curvature, minimizing unevenness and enhancing the flexibility and reliability of the substrate.
Implementation Method 1
a resin layer including a support located on the first surface side of the insulating base and a coating layer located on the second surface side of the insulating base, the resin layer including a first area and a second area in planar view, the resin layer having a first elastic modulus in the first area and a second elastic modulus in the second area
Data Source
AI summary
According to one embodiment, a flexible substrate includes an insulating base including a first surface and a second surface on an opposite side to the first surface, a wiring layer provided on the second surface side of the insulating base and a resin layer including a support located on the first surface side of the insulating base and a coating layer located on the second surface side of the insulating base, the resin layer including a first area and a second area in planar view, the resin layer having a first elastic modulus in the first area and a second elastic modulus in the second area, and the first elastic modulus being greater than the second elastic modulus.