Pixel Electrode Transfer Pad Layout for Stable Electron Transmission
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Solution Overview
Problem
Current display devices face challenges in stabilizing and improving electron transmission between the pixel electrode and the drain, leading to increased resistance and suboptimal display quality, especially in high-resolution and flexible electronic devices.
Innovation Solution
The design includes a transfer pad with overlapping contact holes in insulating layers, allowing for increased contact area between the pixel electrode and the drain, thereby enhancing electron transmission and reducing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional contact hole structures are used, then device complexity is reduced, but electron transmission stability and conductivity deteriorate
Solution Approach 1:
The patent transitions from a conventional single-layer contact hole structure to a multi-layer insulating structure with first and second contact holes at different vertical levels. This dimensional change allows the pixel electrode to contact the drain through multiple pathways, improving electron transmission stability while managing the increased structural complexity through systematic layering.
Solution Approach 2:
The contact path is segmented into multiple independent contact holes (first contact hole in first insulating layer, second contact hole in second insulating layer) rather than relying on a single contact path. This segmentation provides redundant electron transmission pathways, enhancing reliability while the modular structure helps manage complexity.
2Reliability
If contact area between pixel electrode and drain is increased, then electron transmission is improved, but device area increases
Solution Approach 1:
The patent utilizes the vertical dimension by creating contact holes through multiple insulating layers at different heights. This allows the pixel electrode to establish electrical connection with the drain through vertical pathways rather than requiring expanded horizontal contact area, thus improving electron transmission without proportionally increasing device footprint.
Solution Approach 2:
The patent concentrates the contact area enhancement locally at the pixel electrode-drain interface through multiple contact holes, while the rest of the device structure maintains its original compact dimensions. This localized approach improves electron transmission specifically where needed without uniformly expanding the entire device area.
Data Source
AI summary
An electronic device includes a substrate, a scan line, a transistor, a first insulating layer, a pad, a second insulating layer, and an electrode. The scan line is disposed on the substrate and extends in a first direction. The transistor is disposed on the substrate and includes a drain. The first insulating layer is disposed on the transistor and includes a first contact hole. The pad is disposed on the first insulating layer and adjacent to the scan line, and the pad contacts the drain through the first contact hole. The second insulating layer is disposed on the pad and includes a second contact hole. The electrode is disposed on the second insulating layer and contacts the pad through the second contact hole. The pad overlaps the first contact hole and second contact hole continuously in a direction perpendicular to the first direction.