Display Substrate Isolation Pattern for Cu Ion Diffusion Blocking
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Solution Overview
Problem
Signal lines in display substrates made of copper (Cu) are prone to ion diffusion, leading to short circuits and reduced product yield due to the inability of existing insulating layers to effectively prevent Cu ion penetration.
Innovation Solution
Incorporating an isolation pattern made of semiconductor or metal oxide semiconductor materials between signal lines, which blocks metal ion diffusion and slows down chemical reactions caused by electric fields, ensuring the product yield of the display substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the isolation pattern is made of semiconductor material, then metal ion diffusion is blocked, but the device structure becomes more complex
Solution Approach 1:
The isolation pattern is merged with the existing signal line structure at intersection positions. By positioning the isolation pattern specifically at where the first signal line passes under the second signal line, the design combines multiple functions into a single integrated structure rather than adding separate isolated components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The isolation pattern effectively reduces metal ion diffusion and chemical reactions between crossing signal lines, thereby enhancing the product yield and preventing corrosion and water vapor intrusion, ensuring the integrity and performance of the display substrate.
Implementation Method 1
the signal lines are prone to Cu ion diffusion and Cu ion penetrating the insulating layer may cause a short circuit between the signal lines of different layers
Implementation Method 2
slow down the metal ion diffusion and chemical reaction between crossing metal signal lines due to an action of an electric field
Data Source
AI summary
The present disclosure provides a display substrate, a method for manufacturing the same, and a display device, which belongs to the technical field of displays. The display substrate includes: a first signal line, located on a base substrate and extending in a first direction; a second signal line, located on the base substrate and extending in a second direction, where the second signal line is arranged in a different layer from the first signal line, the second direction intersects with the first direction, the first signal line includes a first portion, and a first orthographic projection of the first portion on the base substrate is located within a orthographic projection of the second signal line on the base substrate; the display substrate further includes: an isolation pattern, located on a side of the first signal line away from the base substrate.