Display Panel Sealant Structure Against Etching Spray Damage
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Solution Overview
Problem
Existing display devices face issues with damage during the etching process due to spraying pressure from etching fluids, which can tear the etch stop layer and damage components above it, leading to increased production costs and inefficiencies.
Innovation Solution
The display panel includes a first substrate with a bending area and a second substrate separated by a sealant, featuring an etch stop layer and a separating layer with a concave portion, which protects components from etching fluid pressure and optimizes the production process by reducing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If etching fluid is sprayed toward the substrate to perform etching, then etching process is completed, but spraying pressure causes damage to display device and tears etch stop layer
Solution Approach 1:
A buffer layer is formed between the etch stop layer and the substrate surface to absorb and distribute the spraying pressure of the etching fluid. This buffer layer acts as a cushion that prevents direct impact of the high-pressure spray on the etch stop layer, thereby preventing damage while maintaining etching efficiency.
Solution Approach 2:
The buffer layer serves as an intermediary element between the etching fluid spray and the etch stop layer. It mediates the interaction by absorbing the mechanical stress from the spray, allowing the etching process to proceed without transmitting harmful pressure to the delicate etch stop layer structures.
2Speed
If etching fluid is sprayed at high pressure, then etching speed increases, but components above etch stop layer are damaged
Solution Approach 1:
The buffer layer is positioned beforehand to cushion the impact of high-pressure etching fluid spray. This allows high etching speed to be maintained while the buffer layer protects the components above the etch stop layer from damage by absorbing excess spray pressure.
Solution Approach 2:
The buffer layer acts as a protective intermediary that enables high-speed etching by decoupling the high-pressure spray from the delicate components. It allows the spray to maintain high velocity for efficient etching while preventing transmission of damaging forces to the components above the etch stop layer.
3Ease of manufacture
If etch stop layer is made thinner to reduce complexity, then manufacturing is easier, but it becomes more susceptible to tearing from spray pressure
Solution Approach 1:
The buffer layer provides beforehand cushioning support to thin etch stop layers. This allows the etch stop layer to be made thinner for easier manufacturing and reduced complexity, while the buffer layer compensates for the reduced strength by absorbing spray pressure that would otherwise tear the thin layer.
Solution Approach 2:
The buffer layer serves as a protective intermediary that enables the use of thinner etch stop layers. It mediates between the spray pressure and the thin etch stop layer, allowing manufacturing simplicity to be achieved without sacrificing the structural integrity needed to withstand the etching process.
Data Source
AI summary
A display panel may include a first substrate having a first etching surface, a second substrate disposed to face the first substrate, and a sealant disposed between the first substrate and the second substrate. The sealant may be disposed in an outer area of the first etching surface. A display device including the display panel is also disclosed. According to one or more aspects of the display panel, damage to the display device can be prevented or reduced from a spraying pressure caused by an etching fluid sprayed toward a substrate.