Polarizer Capacitive Touch Screen Roll-to-Roll Manufacturing
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Solution Overview
Problem
Current touch screen manufacturing methods face challenges in producing high-quality capacitive touch sensors with complex geometries and fine features, particularly in reducing optical interference and simplifying the manufacturing process while maintaining quality and reducing costs.
Innovation Solution
A roll-to-roll manufacturing process using flexographic printing and electroless plating to create orthogonal conductive patterns on flexible polarizer films, allowing for the production of high-resolution capacitive touch sensors with thin, flexible electrodes and reduced optical interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional manufacturing methods are used to produce capacitive touch sensors, then manufacturing process complexity and costs increase, but manufacturing precision and quality may be maintained
Solution Approach 1:
The manufacturing process is divided into separate modular stages: printing conductive patterns on individual films, curing each layer, and assembling pre-formed components. This segmentation allows each stage to be optimized independently, simplifying the overall process while maintaining precision through specialized equipment for each module.
Solution Approach 2:
Conductive patterns are printed and cured on separate films before final assembly. This preliminary preparation allows for quality control and alignment adjustments to be made before the final bonding stage, ensuring manufacturing precision is achieved without requiring complex real-time coordination during assembly.
2Manufacturing precision
If complex geometries and fine features are produced in capacitive touch sensors, then measurement and detection difficulty increases, but manufacturing precision is improved
Solution Approach 1:
Traditional mechanical measurement and alignment methods are replaced with optical alignment systems and automated inspection equipment. This substitution enables precise measurement of fine features through non-contact optical methods, reducing the complexity of physical measurement while maintaining high manufacturing precision.
3Illumination intensity
If optical interference is reduced in capacitive touch sensors, then visual performance is improved, but manufacturing complexity increases
Solution Approach 1:
Optical performance is optimized by controlling parameters such as film thickness, material composition, and layer spacing during the printing and assembly process. By establishing standardized parameter ranges for these critical dimensions, the system achieves consistent optical performance without requiring complex adaptive manufacturing processes.
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 enables the production of high-resolution capacitive touch sensors with improved optical performance, reduced manufacturing complexity, and lower costs, supporting multi-touch operations with accurate tracking of multiple fingers or conductive implements.
Implementation Method 1
printing by a flexographic printing process a first pattern on a first side of a first film using a first flexoplate and an ink, wherein the first pattern comprises a first plurality of lines; curing the first film; plating the first film
Implementation Method 2
printing by a flexographic printing process a first pattern on a first side of a first film using a first flexoplate and an ink, wherein the first pattern comprises a first plurality of lines; curing the first film
Data Source
AI summary
Touch screen structures may have a capacitive touch sensor made up of a polarizer film or analyzer. Disclosed herein is a method of producing a capacitive touch sensor using a roll-to-roll handling system comprising: printing, by a first flexoplate and a first ink, a first pattern on a first side of a polarizer film. A second pattern is printed by a second flexoplate and a second ink on the second side of the film. The film is cured and the first and the second pattern are plated and assembled.