Mirror Display Substrate Layout That Avoids Reflective Layer Etching
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Solution Overview
Problem
The manufacturing process of mirror display substrates is complicated due to the need for patterning processes to form light-transmitting holes in the reflective layer, which poses an etching risk and increases production costs.
Innovation Solution
A display substrate design that includes a display region and a binding region, where the protective layer is formed using a first open mask with a first opening exposing the binding pad, and a reflective layer is formed on the protective layer, simplifying the manufacturing process and reducing the risk of etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If patterning processes are performed to form light-transmitting holes in the reflective layer, then the mirror display function is achieved, but the manufacturing process becomes complicated and etching risk increases
Solution Approach 1:
The patent divides the reflective layer into two functional zones: a first reflective layer in the display region with light-transmitting holes for display function, and a second reflective layer in the binding region without holes for mirror function. This segmentation allows different regions to have different structures, achieving both display and mirror functions while simplifying the overall manufacturing process by avoiding complex patterning in the binding region.
Solution Approach 2:
The patent applies different structural characteristics to different regions: the display region has a reflective layer with light-transmitting holes for display function, while the binding region has a reflective layer without holes for mirror function. This local differentiation optimizes each region's function and simplifies manufacturing by avoiding unnecessary patterning in the binding region.
2Adaptability or versatility
If patterning processes are performed to form light-transmitting holes in the reflective layer, then the display function is achieved, but the risk of etching increases
Solution Approach 1:
The patent segments the reflective layer structure into two parts: the first reflective layer in the display region requires patterning for light-transmitting holes, while the second reflective layer in the binding region remains intact. This segmentation isolates the etching process to only the necessary display region, reducing overall etching risk and improving manufacturing reliability.
3Reliability
If a protective layer is arranged between the encapsulating structure layer and the reflective layer to prevent etching risk, then etching protection is improved, but the manufacturing process becomes more complicated
Solution Approach 1:
The patent uses a first open mask to selectively deposit the protective layer only in the binding region where it is needed, rather than depositing it across the entire substrate. This segmented approach provides etching protection where required while avoiding unnecessary process steps and material usage, thereby reducing manufacturing complexity.
Data Source
AI summary
A display substrate includes a display region and a binding region located on one side of the display region, the display region includes a display structure layer, a protective layer provided on the display structure layer and a reflective layer provided on the protective layer, and the display structure layer includes a drive structure layer, a light-emitting structure layer and an encapsulating structure layer stacked on a base; the binding region includes a binding structure layer, a protective layer provided on the binding structure layer at one side of the binding region close to the display region, and a reflective layer provided on the protective layer, and the binding structure layer includes a lead wire structure layer provided on the base, a binding pad provided on the lead wire structure layer and an inorganic encapsulating layer.