Light-emitting Substrate Isolation Structure for Moisture Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic display products face issues with moisture and oxygen intrusion from the environment, which can react with internal structures and degrade their electrical properties and lifespan.
Innovation Solution
A light-emitting substrate with a structured isolation portion and insulating patterns is designed, featuring a first conductive pattern indented inwardly relative to a second conductive pattern, with a second insulating pattern in the same layer, and a first insulating pattern forming a 'T'-shaped structure to enhance moisture and oxygen isolation, along with a disconnected first conductive layer and light-emitting functional layer to prevent intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional isolation structure is used, then the device complexity is low, but moisture and oxygen can intrude into the light-emitting region causing degradation
Solution Approach 1:
The isolation portion is divided into multiple conductive patterns (first conductive pattern, second conductive pattern) and insulating patterns (first insulating pattern, second insulating pattern) that are segmented and arranged in specific spatial relationships. This segmentation creates multiple isolation barriers that collectively block moisture and oxygen intrusion paths while maintaining manageable structural complexity through modular design
Solution Approach 2:
The isolation structure extends from two-dimensional planar arrangements into three-dimensional stacked configurations with conductive and insulating patterns arranged in multiple layers at different heights. The first conductive pattern is positioned at a first height, the second conductive pattern at a second height, with insulating patterns filling the spaces between them, creating vertical isolation barriers that block moisture and oxygen intrusion paths more effectively than planar structures alone
2Reliability
If the first conductive pattern is indented inwardly relative to the second conductive pattern, then the moisture isolation path is extended, but the manufacturing precision requirements increase
Solution Approach 1:
The first conductive pattern is pre-positioned with an intentional inward indentation relative to the second conductive pattern before subsequent manufacturing steps. This preliminary positioning creates a built-in offset that extends the isolation path and provides a tolerance buffer for later alignment operations, reducing the cumulative precision requirements across multiple manufacturing steps
Solution Approach 2:
The inward indentation of the first conductive pattern creates a localized structural feature that specifically targets the moisture intrusion path at critical locations. This local quality modification enhances isolation effectiveness at the indentation region without requiring uniform high precision across the entire structure, allowing standard manufacturing tolerances to suffice
3Reliability
If multiple insulating patterns are added to enhance isolation, then the moisture blocking capability improves, but the device complexity increases
Solution Approach 1:
The first insulating pattern and second insulating pattern are merged into a coordinated isolation system where they work together to block moisture and oxygen paths. The first insulating pattern fills spaces between conductive patterns at the first height, while the second insulating pattern fills spaces at the second height, creating a combined multi-level isolation barrier that achieves enhanced protection without requiring completely separate isolation systems
Solution Approach 2:
The insulating patterns serve multiple functions simultaneously: they provide electrical insulation between conductive patterns, create physical barriers against moisture and oxygen intrusion, and fill void spaces in the isolation structure. This multi-functionality reduces the need for additional dedicated isolation components, maintaining relatively simple device architecture while achieving comprehensive protection
Data Source
AI summary
A light-emitting substrate includes; a base, an isolation portion disposed on the base and located in an isolation region located outside a light-emitting region, and a second insulating pattern located in the light-emitting region. The isolation portion includes a first conductive pattern, a second conductive pattern and a first insulating pattern that are sequentially stacked on the base; an orthogonal projection of the first conductive pattern on the base is located within an orthogonal projection of the second conductive pattern on the base; and a side face of the first conductive pattern proximate to the light-emitting region and a corresponding side face of the second conductive pattern proximate to the light-emitting region have a first gap therebetween. A side face of the second insulating pattern proximate to the first insulating pattern and a side face of the first insulating pattern proximate to the second insulating pattern have a second gap therebetween.