Display Electrode Contact Layout for Stable Pixel-Drain Conduction
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Solution Overview
Problem
Existing display devices face challenges in stabilizing electron transmission between the pixel electrode and the drain, which affects display quality and resolution.
Innovation Solution
The proposed display device includes a substrate with a semiconductor transistor, insulating layers, and a transfer pad that increases the contact area between the pixel electrode and the drain through strategically designed contact holes and regions on the transfer pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single contact hole structure is used between pixel electrode and drain, then the device complexity is low, but the electron transmission stability is insufficient
Solution Approach 1:
The contact structure is segmented into multiple contact holes (first contact hole and second contact hole) instead of using a single contact hole. This segmentation allows electrons to have multiple transmission pathways from the pixel electrode to the drain, improving electron transmission stability while maintaining manageable device complexity through systematic design
Solution Approach 2:
The contact structure transitions from a single-point contact to a distributed multi-point contact arrangement. By positioning contact holes at different locations (with the second contact hole offset from the first), the patent creates spatial redundancy in the electron transmission path, enhancing reliability without significantly increasing overall device complexity
2Reliability
If the contact area between pixel electrode and drain is increased, then the resistance is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The total contact area is segmented into multiple contact holes rather than requiring one large contact area. This segmentation distributes the manufacturing precision requirements across multiple smaller features, making it more feasible to achieve the necessary contact area while maintaining reasonable manufacturing precision for each individual contact hole
Solution Approach 2:
The patent applies different characteristics to different contact holes - the first contact hole is positioned to overlap with the signal line for optimal electrical connection, while the second contact hole is offset to provide additional transmission pathways. This local differentiation optimizes electron transmission stability without requiring uniform high precision across all contact features
Data Source
AI summary
An electronic device includes a substrate, a semiconductor disposed on the substrate, a first signal line, a first electrode disposed on the semiconductor, a first insulating layer disposed on the first electrode, a second electrode disposed on the first insulating layer, a second insulating layer disposed on the second electrode, and a third electrode disposed on the second insulating layer. The first signal line is overlapped with the semiconductor. The first electrode is electrically connected to the semiconductor. The second electrode is electrically connected to the first electrode through a first contact hole of the first insulating layer. The third electrode is electrically connected to the second electrode through a second contact hole of the second insulating layer. The first contact hole and the second contact hole are respectively disposed on two opposite sides of the first signal line in a top view of the electronic device.