Mask Plate Assembly Colloid Flatness
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Solution Overview
Problem
The existing manufacturing process of OLED displays faces issues with the attachment of the mask plate to the substrate, leading to warped edges and surface roughness due to stress and solder joints, which affects the evaporation quality and results in shadow effects near the pixel edges.
Innovation Solution
A method involving a mask plate assembly where a redundant portion is removed and glue is dispensed to form a colloid on the surface, which is higher than other areas, allowing for a flatter attachment to the substrate, covering warped portions and solder joints, and ensuring precise pixel formation during evaporation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the mask plate is welded onto the frame, then the mask plate can be securely attached, but the edge of the mask plate becomes warped and the surface becomes rough due to stress and solder joints
Solution Approach 1:
The patent introduces a colloid as an intermediary substance between the mask plate and substrate. This colloid layer compensates for the warped edges and rough surface caused by welding, allowing the mask plate to be securely attached while maintaining a flat attachment surface that ensures uniform evaporation and prevents shadow effects.
2Manufacturing precision
If the redundant portion of the mask plate is removed, then the precision of pixel formation is improved, but the mask plate becomes more susceptible to warping and stress
Solution Approach 1:
The patent applies the colloid to the mask plate surface before the evaporation process. This preliminary action of adding the colloid layer provides structural support and stress distribution to the mask plate, compensating for the reduced structural stability caused by removing the redundant portion, while maintaining the precision of pixel formation.
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 solution enables a more accurate and flat attachment of the mask plate to the substrate, improving the evaporation quality by ensuring the mask plate is strictly parallel to the substrate, resulting in better display quality with reduced shadow effects and surface roughness.
Implementation Method 1
dispensing glue in a predetermined area of a surface of the mask plate, and curing the glue to form a colloid
Data Source
AI summary
The present disclosure provides a method for manufacturing a mask plate assembly, which includes providing a mask plate and a frame and securing the mask plate to the frame. The secured mask plate comprises a redundant portion extending out of the frame. The method further comprises removing at least a part of the redundant portion, and dispensing glue in a predetermined area of a surface of the mask plate, and curing the glue to form a colloid, wherein the colloid is higher than any other area on the surface of the mask plate where the colloid is not formed. The present disclosure further provides a mask plate assembly comprising a frame, and a mask plate secured to the frame, wherein a colloid is formed in a predetermined area of a surface of the mask plate, and the colloid is higher than any other area on the surface of the mask plate where the colloid is not formed. The present disclosure further provides an evaporation device and a method for manufacturing the display substrate.