Flexible Substrate With Segmented Insulating Basement
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Solution Overview
Problem
Flexible substrates face damage from stress due to inflection, expansion, and contraction, as existing measures like honeycomb-shaped openings and meandered wiring designs are inadequate in preventing wiring damage.
Innovation Solution
A flexible substrate design featuring an insulating basement with island-like and belt portions, an organic insulating layer, and a projecting portion on the first electrode, which disperses applied forces and inhibits damage to the electrical elements by distributing stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional measures like honeycomb-shaped openings or meandered wiring are used, then flexibility is maintained, but wiring damage occurs due to stress from inflection, expansion, and contraction
Solution Approach 1:
The insulating basement is divided into multiple island-like portions and belt portions, creating a segmented structure that allows independent movement and stress distribution. This segmentation prevents stress concentration on continuous wiring, thereby maintaining wiring integrity while preserving flexibility.
Solution Approach 2:
Different regions of the substrate are given different structural properties - island-like portions provide localized support for electrical elements while belt portions connect these islands and accommodate deformation. This local differentiation allows the substrate to be flexible overall while protecting critical wiring areas.
2Adaptability or versatility
If the substrate is made flexible to enable attachment on curved surfaces, then adaptability improves, but stress from inflection, expansion, and contraction damages the wiring
Solution Approach 1:
The insulating basement structure is designed beforehand to absorb and distribute the stresses that will occur during inflection, expansion, and contraction. The island-like and belt portions create a cushioning effect that protects wiring from damage before stress can cause harm.
Solution Approach 2:
The insulating basement itself is designed as a flexible structure with island-like and belt portions that can deform elastically. This flexible basement structure accommodates the stresses of curved surface attachment while maintaining wiring integrity through its distributed support architecture.
3Adaptability or versatility
If the insulating basement is made elastic to allow expansion and contraction, then flexibility is improved, but wiring damage risk increases
Solution Approach 1:
The elastic insulating basement is segmented into island-like portions (for electrical elements) and belt portions (for connection). This segmentation allows the basement to expand and contract elastically while preventing stress transmission to wiring, thereby protecting wiring strength during dimensional changes.
Solution Approach 2:
The insulating basement has different local functions - island-like portions provide stable support for electrical elements while belt portions are designed to accommodate elastic deformation. This local quality differentiation enables the basement to be elastic overall while protecting wiring in critical areas.
Data Source
AI summary
According to one embodiment, a flexible substrate includes an insulating basement including an island-like portion and a plurality of belt portions, an organic insulating layer, and an electrical element and a projecting portion provided on the organic insulating layer and overlapping the island-like portion. The electrical element includes a common electrode, a first electrode located between the organic insulating layer and the common electrode, and an active layer located between the common electrode and the first electrode. The projecting portion is located on the first electrode and projects in a direction towards the common electrode from the first electrode.