Display Substrate Transparent Conductive Layout Against Reflective Focusing
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Solution Overview
Problem
The exposure process in the preparation of transparent conductive layers for display substrates leads to thinning or disconnection of conductive lines due to reflective focusing effects, particularly in regions with edge transparent conductive lines, which affects the yield and performance of the display substrate.
Innovation Solution
Incorporating an auxiliary structure in the transparent conductive layer, such as auxiliary blocks or rings, to mitigate the reflective focusing effects and stabilize the exposure environment, thereby preventing line width thinning and disconnection of transparent conductive lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If transparent conductive lines are formed in the exposure process, then the conductive lines can be created to connect pixel circuits and light-emitting elements, but the reflective focusing effects cause line width thinning or disconnection
Solution Approach 1:
The patent introduces an auxiliary structure as an intermediary element in the transparent conductive layer to modify the exposure environment. This auxiliary structure acts as a mediator that interferes with the reflective focusing effects, preventing the concentration of light energy that causes line width thinning and disconnection in edge regions.
Solution Approach 2:
The patent applies local quality by positioning the auxiliary structure specifically in edge regions where transparent conductive lines are most vulnerable to reflective focusing effects. The auxiliary structure is strategically placed to provide localized protection to edge transparent conductive lines without affecting the overall conductive pattern or requiring changes to the entire layer structure.
2Ease of manufacture
If the exposure process is performed without auxiliary structures, then the manufacturing process is simpler, but the yield decreases due to line disconnection and thinning
Solution Approach 1:
The auxiliary structure serves as an intermediary that can be integrated into the existing transparent conductive layer formation process without fundamentally changing the manufacturing workflow. It is formed simultaneously with the transparent conductive lines through the same exposure and development steps, adding minimal process complexity while significantly improving yield by preventing line disconnection.
3Manufacturing precision
If auxiliary structures are added to the transparent conductive layer, then the exposure environment is stabilized and line width integrity is maintained, but the device structure becomes more complex
Solution Approach 1:
The auxiliary structure is implemented with local quality by confining it to specific edge regions where it is most needed, rather than uniformly across the entire transparent conductive layer. This localized approach maintains manufacturing precision in critical areas while minimizing the increase in overall device complexity.
Solution Approach 2:
The auxiliary structure is designed to serve multiple functions: it stabilizes the exposure environment, prevents reflective focusing effects, and can be formed using the same materials and processes as the transparent conductive lines themselves. This multi-functionality reduces the need for additional specialized components or processes.
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 auxiliary structure improves the stability of the transparent conductive lines during the exposure process, enhancing the yield and performance of the display substrate by reducing disconnections and maintaining line width integrity.
Implementation Method 1
The exposure process in the preparation of transparent conductive layers for display substrates leads to thinning or disconnection of conductive lines due to reflective focusing effects
Data Source
AI summary
A display substrate includes a base substrate, a pixel circuit layer, a first planarization layer, at least one transparent conductive layer, and a plurality of first light-emitting elements. The base substrate includes a first display region and a second display region, wherein the first display region at least partially surrounds the second display region. The pixel circuit layer is located in the first display region, and includes a plurality of pixel circuits, wherein the plurality of pixel circuits include a plurality of first pixel circuits. A plurality of first light-emitting elements are located in the second display region. The first planarization layer is located on a side of the pixel circuit layer away from the base substrate, and is located in the first display region and the second display region.