Flexographic Photomask Manufacturing via Laser Ablation
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Solution Overview
Problem
Conventional photomask manufacturing is complex, time-consuming, expensive, and limited to small-area applications, producing substantial waste and requiring hazardous chemicals.
Innovation Solution
A method involving laser-ablation of a thermal imaging layer with a photomask pattern onto a flexographic printing plate substrate, followed by UV exposure and development, which eliminates the need for opaque layers and acid-based etchants, enabling roll-to-roll production of larger, flexible photomasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional photomask manufacturing methods are used, then photomasks can be produced with traditional processes, but the manufacturing process is complex, time-consuming, expensive, and limited to small-area applications
Solution Approach 1:
The patent replaces conventional mechanical and chemical photomask manufacturing processes with a flexographic printing system that uses a flexible printing plate and ink transfer mechanism. This substitution enables roll-to-roll production of large-area photomasks, dramatically increasing productivity while simplifying the manufacturing process.
Solution Approach 2:
The patent changes the fundamental parameters of photomask manufacturing by using a flexible printing plate with embossing patterns instead of traditional rigid masks and chemical etching processes. This allows for continuous roll-to-roll production and eliminates the size limitations of conventional methods.
2Ease of manufacture
If conventional photomask manufacturing is used, then traditional photomask production is achieved, but substantial waste is produced and hazardous chemicals are required
Solution Approach 1:
The patent extracts and eliminates the need for hazardous chemicals and waste-generating steps from the photomask manufacturing process. The flexographic printing method directly deposits opaque ink patterns onto the substrate without requiring acid-based etchants or extensive chemical processing, thereby reducing waste and simplifying manufacturing.
Solution Approach 2:
The patent employs a disposable flexible printing plate that can be easily replaced, eliminating the need for complex tooling and reducing waste from traditional manufacturing processes. The printing plate itself becomes a consumable item rather than a durable tool requiring maintenance and cleaning.
3Area of stationary object
If conventional photomask methods are used, then traditional photomask production is achieved, but the photomasks are limited to small areas and lack flexibility
Solution Approach 1:
The patent uses a flexible printing plate made of thin film material that can be rolled and processed in a roll-to-roll manner. This flexibility enables the production of large-area photomasks that can be adapted to different substrate sizes and shapes, overcoming the area limitations of conventional rigid photomask manufacturing.
Solution Approach 2:
The patent introduces dynamic capabilities to photomask manufacturing by using a flexible, rollable printing system that can be continuously processed. The flexible printing plate can be dynamically adjusted and replaced, enabling versatile production of photomasks in various sizes and configurations.
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 simplifies and cost-reduces photomask manufacturing, reduces waste, and allows for the production of larger, flexible photomasks compatible with flexographic printing processes, overcoming the limitations of conventional methods.
Implementation Method 1
The photomask patterned design is laser-ablated into a thermal imaging layer
Implementation Method 2
The bottom side of the flexographic printing plate substrate is exposed to UV-A radiation. The top side of the flexographic printing plate substrate is exposed to UV-A radiation
Data Source
AI summary
A method of manufacturing a flexographic printing plate includes designing a photomask patterned design. The photomask patterned designed is laser-ablated into a thermal imaging layer. The laser-ablated thermal imaging layer is laminated to a top side of a flexographic printing plate substrate. A bottom side of the flexographic printing plate substrate is exposed to UV-A radiation. The top side of the flexographic printing plate substrate is exposed to UV-A radiation. The thermal imaging layer is removed. The flexographic printing plate substrate is developed. A flexographic printing system for printing a photomask includes an ink roll, an anilox roll, a printing plate cylinder, a flexographic printing plate disposed on the printing plate cylinder, and an impression cylinder. The flexographic printing plate comprises embossing patterns corresponding to a photomask patterned design. The flexographic printing plate may be used in a flexographic printing system to manufacture a photomask with flexography.