Protective Layer Surface Treatment for Display Etching Adhesion
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Solution Overview
Problem
Emissive display devices face issues with the protective layer peeling off during the substrate etching process when removing the acid-resistant film, leading to defects in the display device.
Innovation Solution
A manufacturing method involving the formation of protrusions and depressions on the protective layer through surface treatments like plasma or bead treatment, which reduces the contact angle and peel force, preventing the protective layer from being removed during substrate etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the protective layer is formed on the display panel without surface treatment, then the manufacturing process is simple, but the protective layer peels off during substrate etching process
Solution Approach 1:
The patent applies surface treatment (plasma treatment or bead treatment) to the protective layer before forming the adhesive layer and acid-resistant film. This preliminary action modifies the surface properties of the protective layer, creating protrusions and depressions that enhance mechanical interlocking and prevent peeling during subsequent etching processes.
Solution Approach 2:
The patent changes the surface parameters of the protective layer through surface treatment, specifically reducing the contact angle from greater than 10 degrees to 10 degrees or less. This parameter change increases surface energy and wettability, improving adhesion between the protective layer and the adhesive layer, thereby preventing peeling during etching.
2Ease of manufacture
If the contact angle of the protective layer is greater than 10 degrees, then the surface is smoother and easier to form, but the adhesive layer does not bond properly causing peeling
Solution Approach 1:
The patent explicitly controls the contact angle parameter of the protective layer surface, reducing it to 10 degrees or less through surface treatment. This parameter change optimizes the balance between surface smoothness for easy formation and surface energy for strong adhesive bonding, preventing peeling during the etching process.
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 surface treatment effectively prevents the protective layer from being peeled off during the removal of the acid-resistant film, ensuring the integrity of the display device and maintaining its protective properties.
Implementation Method 1
coating the UV curable resin on the display panel and curing the UV curable resin through UV irradiation
Implementation Method 2
the surface treatment may be performed by a plasma treatment or a bead treatment
Implementation Method 3
the surface treatment may be performed by a plasma treatment or a bead treatment
Data Source
AI summary
A manufacturing method of a display device includes: forming a display panel on a substrate; forming a protective layer on the display panel; forming protrusions and depressions on a surface of the protective layer by performing a surface treatment on the surface of the protective layer; attaching an adhesive layer and an acid resistant film on the protective layer; etching the substrate; and removing the adhesive layer and the acid resistant film.