OLED Display Panel Single-Layer Electrode Structure
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Solution Overview
Problem
Conventional OLED display panels require multiple masks for forming source, drain, and anode electrodes, increasing production costs and time.
Innovation Solution
The OLED display panel forms the source, drain, and anode electrodes in a single layer, with the anode connected to the source electrode, using a gate insulating layer, passivation layer, and planarization layer to facilitate contact through vias, allowing for a single process without multiple masks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple masks are used to form source electrode, drain electrode, and anode separately, then each electrode can be formed with precise control, but production costs increase and production time extends
Solution Approach 1:
The patent merges the formation of source electrode, drain electrode, and anode into a single electrode layer that is formed in one step. The electrode layer includes source electrode portions, drain electrode portions, and anode portions all formed simultaneously through a single mask process, eliminating the need for multiple separate masking steps while maintaining electrode formation precision
Solution Approach 2:
The single electrode layer serves multiple functions: it acts as both the source/drain electrodes for the TFT device and the anode for the OLED device. This multi-functional design allows one electrode layer to replace what would traditionally require three separate electrode formations, improving productivity without sacrificing functionality
2Manufacturing precision
If multiple masks are used to form source electrode, drain electrode, and anode, then each electrode pattern can be precisely defined, but the number of process steps increases
Solution Approach 1:
The patent combines multiple electrode formation processes into a single process step. The electrode layer is formed in one deposition step with one mask alignment, integrating what would traditionally be three separate processes into one, thereby reducing process complexity while maintaining pattern definition through careful electrode layer design
Solution Approach 2:
The single electrode layer is segmented into different functional regions (source electrode portions, drain electrode portions, and anode portions) that are electrically isolated through the insulating layer. This segmentation allows each region to serve its specific function while being formed in a single process, simplifying the overall process complexity
Data Source
AI summary
The present disclosure provides an OLED display panel including a substrate, and a gate electrode, an active layer, a source electrode, and a drain electrode of a TFT device disposed on the substrate, and an anode of an OLED device disposed on the substrate; wherein the source electrode, the drain electrode, and the anode are formed in a same layer, and the anode is connected to the source electrode. The source electrode, the drain electrode, and the anode are arranged in a same layer, so that the source electrode, the drain electrode, and the anode are formed through a single process, thereby simplifying a manufacturing process and saving costs.