GOA Control Switch Layout to Prevent Source-Drain Shorts
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Solution Overview
Problem
During the manufacturing of Gate Driver on Array (GOA) circuits, uneven etching can lead to short circuits between the source and drain electrodes due to the close channel distance and susceptibility of the source lead to connection with both electrodes.
Innovation Solution
The control switch of the driving circuit is designed such that the extension line of the source lead is located between the first drain branch and the source trunk, avoiding overlap with the drain branch, thus preventing short circuits even with uneven etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the channel distance between source and drain is reduced to increase integration degree, then the integration degree is improved, but the risk of short circuit between source and drain increases due to uneven etching
Solution Approach 1:
The source electrode is divided into multiple source branches (first source branch, second source branch, etc.) that are arranged in parallel. This segmentation increases the channel distance between the source and drain electrodes while maintaining high integration degree, thereby reducing the risk of short circuit due to uneven etching.
2Reliability
If multiple source branches are arranged in parallel to prevent short circuit, then the short circuit risk is reduced, but the device complexity increases
Solution Approach 1:
Multiple source branches are merged with a common source trunk to form the complete source electrode structure. This merging approach allows multiple parallel source branches to share common connection points, reducing the overall device complexity while maintaining the benefits of parallel arrangement for short circuit prevention.
Data Source
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AI summary
A control switch of a driving circuit (200), an array substrate (100), and a display panel (400) are disclosed. The control switch includes a thin film transistor (220). In the thin film transistor (220), the electrode (230) includes at least two source branches (231), and the drain electrode (240) includes at least one drain branch (241). Each source branch (231) directly connected to the source lead (210) is a first source branch (232). Each drain branch (241) adjacent to the first source branch (232) is a first drain branch (242). An extension of each of the at least one source lead (210) is located between the respective first drain branch (241) and the source trunk (234).