Polyimide Coating via Spray Nozzles and Shaping Roller
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Solution Overview
Problem
Current polyimide coating methods for liquid crystal displays are complex and time-consuming, leading to material wastage due to uneven application and flow of polyimide on substrates.
Innovation Solution
A method and device utilizing at least two nozzles to spray a polyimide solution uniformly onto a glass substrate, followed by a roller with a printing plate to shape the film, ensuring efficient and flat coating, with the nozzles and roller arranged to match the substrate width and using materials like polybutadiene resin or fluorine-based printing plates for optimal results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If polyimide is applied uniformly to a printing plate and transferred by a roller while the substrate moves in plane, then the polyimide coating can be completed, but the coating time is extended and the device becomes complicated, causing polyimide to flow away from the substrate edges and resulting in material waste
Solution Approach 1:
The patent replaces the traditional mechanical roller transfer system with a spray-based application system. Instead of using a roller to transfer polyimide from a printing plate to the substrate, the invention uses spray nozzles to directly deposit polyimide solution onto the substrate, eliminating the complex mechanical transfer mechanism and reducing coating time
Solution Approach 2:
The patent employs spray nozzles that utilize pneumatic or hydraulic principles to atomize and deposit polyimide solution onto the substrate. This fluid-based delivery system replaces the solid mechanical roller transfer, enabling faster and more efficient coating application
2Ease of manufacture
If the substrate moves in plane during roller transfer coating, then coating can be completed, but polyimide flows away from opposite sides of the substrate resulting in material waste
Solution Approach 1:
By replacing the roller transfer mechanism with direct spray deposition, the patent eliminates the substrate movement requirement and prevents polyimide from flowing off the edges during the coating process, thereby reducing material waste
Solution Approach 2:
The spray system applies polyimide solution in a controlled manner before the substrate completes its positioning, ensuring the coating is deposited precisely where needed without requiring the substrate to move during application, thus preventing material loss
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 significantly reduces coating time, increases efficiency, and decreases costs by ensuring a uniform and flat polyimide film application, minimizing material waste.
Implementation Method 1
applying the nozzle to spray a polyimide solution onto the glass substrate to form a polyimide film
Implementation Method 2
the roller that comprises the printing plate shapes the polyimide film that is uniformly distributed on the glass substrate to have a surface of the polyimide film formed on the glass substrate uniform and flat
Data Source
AI summary
An embodiment of the present invention discloses a polyimide coating method, which includes the following steps: providing a glass substrate and at least one nozzle; applying the nozzle to a polyimide solution onto the glass substrate to form a polyimide film; and moving the glass substrate to have the glass substrate pass through a roller that includes a printing plate so that the roller that includes the printing plate shapes the polyimide film uniformly distributed on the glass substrate to have a surface of the polyimide film formed on the glass substrate uniform and flat. The present invention also provides a polyimide coating device. The polyimide coating method and device of the present invention shorten coating time of polyimide, increase coating efficiency, and reduce coating cost.