Display Substrate Masking for Moisture-Safe Cut Regions
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Solution Overview
Problem
During the manufacturing of display panels, the exposure of the common layer at the cutting position leads to moisture and oxygen ingress, which can damage the light-emitting elements and shorten the service life of the display device.
Innovation Solution
A method and device are employed to shield the to-be-cut region of the substrate with a shielding member during the evaporation process, ensuring the common layer is not deposited in these regions, thereby preventing exposure to the external environment and using an encapsulation layer to protect the cut regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the common layer is deposited over the entire substrate including to-be-cut regions, then the manufacturing process is simplified, but the common layer becomes exposed to moisture and oxygen after cutting, reducing device reliability
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different substrate regions. The to-be-cut regions are specifically excluded from common layer deposition through masking, while display regions receive the full coating. This localized approach ensures that cut edges do not expose the common layer to environmental damage, thereby maintaining reliability without significantly complicating the overall manufacturing process.
2Reliability
If a shielding member is introduced to protect to-be-cut regions during evaporation, then moisture and oxygen ingress is prevented, but the device complexity increases
Solution Approach 1:
The patent introduces a shielding member as an intermediary element during the evaporation process. This mask physically blocks the deposition of common layer material onto to-be-cut regions, preventing future exposure issues. The shielding member is a standard component in thin film deposition equipment, so while it adds a step to the process, it does not fundamentally increase device complexity.
3Reliability
If the common layer is avoided in to-be-cut regions, then encapsulation effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent implements preliminary action by positioning and securing the shielding member before the evaporation process begins. This pre-positioning ensures that the mask is correctly aligned to protect the intended regions before any material deposition occurs. By establishing the protective configuration in advance, the process achieves reliable encapsulation while managing precision requirements through proactive setup rather than corrective measures.
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
This approach prevents the common layer from contacting the external environment, thereby extending the service life of the display device by encapsulating the to-be-cut regions with an encapsulation layer, thus protecting against moisture and oxygen ingress.
Implementation Method 1
evaporating a common layer material onto the to-be-evaporated substrate to form a common layer of the display substrate
Implementation Method 2
evaporating a common layer material onto the to-be-evaporated substrate to form a common layer of the display substrate, wherein the common layer material is deposited onto the display region rather than the to-be-cut region
Implementation Method 3
enabling a first electromagnet at a side of a second surface of the to-be-evaporated substrate to attract the shielding member onto the first surface
Implementation Method 4
attaching the shielding member onto the support surface through a suction member
Data Source
AI summary
A display substrate, a method and a device for manufacturing the display substrate, and a display device are provided. The method includes shielding a to-be-cut region of a to-be-evaporated substrate with a shielding member and evaporating a common layer material onto the to-be-evaporated substrate to form a common layer of the display substrate. The display substrate includes the to-be-cut region and a display region surrounding the to-be-cut region, and the common layer material is deposited onto the display region rather than the to-be-cut region.