Flexible Display Cover Coating Without BM Layer Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for forming abrasion-resistant coating layers on flexible display devices damage the black matrix printing layer and increase production costs due to complex processes and yield losses.
Innovation Solution
A method involving the formation of multiple black matrix printing layers on a transparent film, followed by precise cutting and attachment of a release film, and subsequent application of an abrasion-resistant coating using existing equipment and processes, ensuring the coating is applied without damaging the printing layer and minimizing additional yield generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AF coating methods (mask printing and peeling) are used, then the cover glass can be coated, but the BM printing layer is damaged and production costs increase
Solution Approach 1:
The release film is attached to the BM printing layer before the AF coating process. This preliminary action protects the BM printing layer from damage during coating and eliminates the need for mask printing and peeling, thereby maintaining layer integrity while simplifying the manufacturing process
Solution Approach 2:
The release film serves as an intermediary between the BM printing layer and the AF coating layer. It allows the AF coating to be applied uniformly without directly contacting and damaging the BM printing layer, while also eliminating the need for complex mask-based coating methods
2Reliability
If conventional AF coating methods are used, then the cover glass can be coated, but production unit price increases due to additional yield
Solution Approach 1:
The release film is attached in advance to prevent BM printing layer damage before it occurs, eliminating rework and scrap. This prevents yield loss and maintains high production efficiency without compromising layer integrity
Solution Approach 2:
The complex mask printing and peeling steps are extracted from the manufacturing process entirely. By using the release film method, these unnecessary steps that cause yield loss are removed, improving productivity while maintaining protection of the BM printing layer
3Area of stationary object
If the AF coating layer is formed over the BM print layer, then complete coverage is achieved, but the coating layer peels due to weak bonding
Solution Approach 1:
The release film creates different bonding characteristics in different areas: strong bonding between the release film and BM printing layer, and strong bonding between the AF coating and the release film. This local quality variation ensures complete coverage while maintaining strong bonding throughout the structure
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 damage to the black matrix printing layer, reduces production costs by avoiding complex processes, and maintains the integrity of the coating layer, thereby minimizing scratches on the flexible display.
Implementation Method 1
The AF coating is performed by vacuum deposition or sputtering.
Implementation Method 2
The AF coating is performed by vacuum deposition or sputtering.
Implementation Method 3
a laser beam is used to cut the release film along the black matrix printing layer
Data Source
AI summary
Disclosed are a display device and a method for manufacturing a cover thereof. A method for manufacturing a cover of a display device comprises: (a) a step in which a BM printing layer is formed on the front surface of a transparent film, and a release film is attached thereto; (b) a step in which the release film is cut along the BM printing layer; (c) a step in which the release film attached to the front surface of the transparent film is removed; (d) a step in which an abrasion-resistant coating layer is formed on the front surface of the transparent film; and (e) a step in which the release film attached to the BM printing layer is removed.