Array Substrate Bridge Structure for Data Line Protection
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Solution Overview
Problem
In liquid crystal display manufacturing, data lines are prone to breakage during the cutting process, leading to defective displays due to damage from the counter substrate material and poor protection from the insulating layer, resulting in reduced image quality and increased product abandonment.
Innovation Solution
An array substrate with a bridge structure and connection lines that connect data lines in an LED region and under a scribe line of a counter substrate, using a passivation layer and via-holes to ensure continuous signal transmission even if data lines break, and utilizing a multi-layer structure for protection during cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is provided above the wirings at both sides of the scribe line to prevent breakage during cutting, then the insulating layer and data lines are protected from damage, but the data lines still break due to material detachment from the counter substrate during the cutting process
Solution Approach 1:
The patent applies preliminary action by providing a protective layer (insulating layer) above the data lines and wirings before the cutting process occurs. This protective layer is formed in advance to prevent damage from material detachment during cutting, thereby protecting the data lines and reducing product abandonment.
2Ease of manufacture
If the insulating layer materials are used with low adhesion and hardness, then the manufacturing process is simpler, but the insulating layer detaches under external force causing exposure of electrically conductive layers and data line damage
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical properties of the insulating layer materials. Specifically, it increases the adhesion and hardness parameters of the insulating layer to prevent detachment under external force during cutting, while maintaining ease of manufacture through appropriate material selection.
3Device complexity
If data lines are located near the scribe line of the counter substrate to reduce wiring length, then the device complexity is reduced, but the data lines are more prone to breakage during cutting and transferring
Solution Approach 1:
The patent applies beforehand cushioning by positioning the data lines in a location that is less prone to damage during cutting and transferring, even if it increases wiring length slightly. This strategic positioning acts as a cushion against the harmful effects of material detachment, prioritizing data line integrity over minimal wiring length.
Data Source
AI summary
An array substrate, a manufacturing method thereof and a display panel are disclosed. The array substrate includes: a base substrate, gate scanning lines, a gate-insulating layer, an active layer, data lines, a passivation layer, and pixel electrodes; the array substrate further includes: a bridge structure and a connection line corresponding to each data line; the bridge structure is located on the passivation layer and is provided in a same layer as the pixel electrodes; each connection line is located on the base substrate and is connected with the data line, through the bridge structure in an LED region and in a region under a scribe line of a counter substrate. Therefore the problem of defective display caused by breakage of data lines can be solved, and the display effect of a liquid crystal display device can be improved.