Display Panel Electrode Layout for Moisture-Resistant Transistors
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Solution Overview
Problem
Conventional mini-LED and micro-LED display technology electronic terminals are prone to transistor device failure due to moisture and oxygen ingress through the encapsulating structure, reducing their operational reliability.
Innovation Solution
A display panel design featuring a substrate with an active layer, a first conductive layer including a gate electrode that overlaps with the channel portion, and a second conductive layer with a source electrode in a different layer than the drain electrode, where the source electrode extends to overlap the gate electrode, ensuring electrical insulation and increasing the coverage of the active layer to prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If less non-metallic layers are used to separate metal layers to achieve seamless splicing technology, then manufacturing complexity is reduced, but moisture and oxygen can easily enter the active layer through the encapsulating structure and film layers, reducing transistor device reliability
Solution Approach 1:
The source electrode is positioned in a different layer than the drain electrode, creating a three-dimensional spatial arrangement where the source electrode extends underneath the gate electrode. This dimensional change allows the source electrode to overlap with the channel portion and provide moisture barrier coverage without requiring additional non-metallic separator layers, thus maintaining reliability while reducing structural complexity
Solution Approach 2:
The source electrode serves dual functions: it provides electrical connection to the conductive portion and simultaneously acts as a moisture barrier by overlapping with the channel portion of the active layer. This multi-functionality eliminates the need for separate non-metallic protective layers, reducing device complexity while maintaining reliability
2Reliability
If the source electrode is disposed in a different layer from the drain electrode with overlapping projections, then electrical insulation between source and drain is ensured and coverage of the active layer is increased, but device structure becomes more complex
Solution Approach 1:
By positioning the source electrode in a different layer than the drain electrode and allowing it to extend underneath the gate electrode, the design achieves spatial separation for electrical insulation while maintaining planar overlap for moisture protection. This three-dimensional arrangement provides both reliability benefits without requiring additional separator layers
Solution Approach 2:
The source electrode structure merges multiple functions into a single component: electrical connection, electrical insulation through layer separation, and moisture barrier protection through overlapping with the channel portion. This consolidation reduces the need for separate protective layers and simplifies the overall device structure
Data Source
AI summary
The present application provides a display panel, a manufacturing method of the display panel, and an electronic terminal. The present application includes, stacked from bottom to top, a driving circuit layer including a driving circuit, a planarization layer including a first planarization portion and a second planarization portion arranged in the same layer, an electrode layer including an electrode group, and a light emitting layer including a light emitting device. The first planarization portion is arranged at one side of the driving circuit close to the electrode layer, the second planarization portion is arranged at one side of the electrode group close to the driving circuit layer, and a thickness of the second planarization portion is greater than a thickness of the first planarization portion.