Masking Ink Etching for Curved Display Panels
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Solution Overview
Problem
Conventional etching methods for curved display panels are time-consuming, struggle with masking complex shapes, and have high etching failure rates due to poor adhesion of masking tape and liquid permeation.
Innovation Solution
A method involving the application of masking ink to non-etched areas, immersion in an ink reservoir, curing, and subsequent removal with a solvent to prevent etching liquid permeation, combined with cleaning to prevent corrosion and ensure precise masking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If masking tape is used to mask non-etched portions and actuation circuit unit, then the display panel can be etched, but it takes a long time to mask because protection tape is wound several times
Solution Approach 1:
The patent replaces the mechanical masking tape system with a liquid masking composition system. The masking liquid is applied to the display panel surface and cured to form a masking layer, eliminating the need for mechanical tape winding operations. This substitution of mechanical masking with chemical/photographic masking resolves the contradiction by dramatically reducing masking time while maintaining precise masking coverage.
Solution Approach 2:
The patent changes the physical state of the masking material from solid tape to liquid composition, and then to a cured solid layer. This parameter change allows the masking material to be applied uniformly and cured quickly, reducing the time-consuming process of winding and adhering multiple layers of masking tape while achieving precise masking boundaries.
2Manufacturing precision
If masking tape is used to mask actuation circuit unit with complicated shape, then the display panel can be etched, but it is difficult to mask even the actuation circuit unit having a complicated shape
Solution Approach 1:
The patent replaces the mechanical tape application process with a liquid masking composition that can be applied uniformly across the entire display panel surface. The liquid masking material easily conforms to complicated shapes of actuation circuit units without requiring precise manual tape placement, significantly improving ease of operation while maintaining masking precision through subsequent curing.
Solution Approach 2:
The liquid masking composition serves as a universal masking solution for all areas of the display panel, including flat regions and complicated-shaped actuation circuit units. This single masking approach replaces the need for different masking techniques for different areas, making the masking operation easier while maintaining precision across all regions.
3Manufacturing precision
If masking tape is used to mask non-etched portions, then the display panel can be etched, but etching failure rate is high because etching liquid permeates due to poor adhesion of masking tape
Solution Approach 1:
The patent changes the masking material from adhesive tape to a liquid composition that is cured to form a cross-linked polymer layer. This parameter change fundamentally improves adhesion to the display panel surface and creates a non-permeable barrier to etching liquid, eliminating the adhesion problems that cause etching failures while maintaining precise masking.
Solution Approach 2:
The masking layer is formed as a composite structure consisting of the cured masking composition that integrates with the display panel surface. This composite masking layer provides both excellent adhesion to prevent peeling and non-permeability to prevent etching liquid penetration, thereby improving etching reliability while maintaining masking precision.
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 method reduces etching time, improves masking of complex shapes, and minimizes etching failures by ensuring complete coverage and easy removal of masking ink, while preventing corrosion and maintaining panel integrity.
Implementation Method 1
curing the masking ink coated on the non-etched portion of the display panel
Implementation Method 2
removing the masking ink from the etched display panel with a solvent, which dissolves the masking ink
Data Source
AI summary
A method of etching a display panel for manufacturing a curved display device comprises the steps of: applying a masking ink in a manner of immersing a non-etched portion of a display panel into an ink reservoir, which contains the masking ink, in order to protrude the non-etched portion from the display panel; curing the masking ink coated on the non-etched portion of the display panel; etching the display panel to reduce the thickness of the display panel by coating an etching liquid onto the display panel on which the masking ink is cured; and removing the masking ink from the etched display panel with a solvent, which dissolves the masking ink.