AMOLED Display Panel Isolation Structure for Opening Moisture Barrier
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Solution Overview
Problem
Flexible AMOLED display panels face challenges due to the sensitivity of organic light-emitting materials to moisture and oxygen, leading to corrosion and abnormal display issues, necessitating effective isolation from these environmental factors.
Innovation Solution
A display panel design featuring a base substrate with a driving circuit layer, isolation columns, and barrier dams that create a moisture- and oxygen-blocking structure around the opening area, using specific metal and insulating layers to form a barrier that prevents the intrusion of water vapor and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the opening area is created for design purposes, then the aesthetic appearance and screen ratio are improved, but moisture and oxygen can enter the display area causing corrosion and abnormal display
Solution Approach 1:
The isolation column is divided into multiple functional layers including first metal layer, first insulating layer, second insulating layer, and second metal layer. Each layer serves specific isolation functions to block moisture and oxygen pathways effectively while maintaining the opening area design.
Solution Approach 2:
The isolation column uses composite structure combining multiple metal layers (first metal layer and second metal layer) with insulating layers (first insulating layer and second insulating layer). This composite material approach creates effective barrier against moisture and oxygen penetration through the opening area.
2Reliability
If isolation structures are added to prevent moisture and oxygen, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The isolation column structure serves multiple functions simultaneously: the first metal layer provides initial barrier, the insulating layers provide electrical isolation and structural support, and the second metal layer provides additional moisture and oxygen blocking. This multi-functional design achieves comprehensive protection without requiring separate independent structures for each function.
Solution Approach 2:
The isolation column adopts a nested structure where the first insulating layer is positioned between the first metal layer and the second insulating layer, which in turn surrounds the second metal layer. This nested arrangement maximizes the isolation effect within a compact vertical space, reducing horizontal complexity.
3Reliability
If multiple metal and insulating layers are used in the isolation column, then the barrier effectiveness against moisture and oxygen is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The formation of the isolation column merges multiple deposition and patterning steps into an integrated process sequence. The first metal layer, first insulating layer, second insulating layer, and second metal layer are formed in a coordinated manner, where overlapping patterning operations reduce the total number of separate manufacturing steps required.
Data Source
AI summary
This disclosure relates to a display panel and a manufacturing method thereof, and a display device. The display panel includes a display area, an opening area and an isolation area located between the display area and the opening area and surrounding the opening area, and includes: a base substrate; a driving circuit layer including a thin film transistor and a storage capacitor that are formed on the base substrate and located in the display area, the thin film transistor including a gate electrode, a first gate insulating layer, an interlayer dielectric layer and source and drain electrodes that are sequentially formed, the storage capacitor including a first electrode plate on the same layer as the gate electrode and a second electrode plate between the first gate insulating layer and the interlayer dielectric layer; a first isolation column formed on the base substrate and located in the isolation area.