Flexographic Printing Alignment Boxes for Touch Sensor Fabrication
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Solution Overview
Problem
Conventional flexographic printing systems face issues with non-uniform line widths and discontinuities due to height differentials in patterned lines or features, leading to alignment challenges and inefficiencies in printing micrometer-fine lines and features for touch sensors.
Innovation Solution
A multi-station flexographic printing system with independent flexo masters for each line width and orientation, using alignment boxes and completions for visual alignment accuracy, allowing for precise control of printing parameters and uniform ink transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional flexographic printing uses a single flexo master with patterned lines of different widths, then all patterned lines are subject to the same printing parameters, but this results in non-uniform line widths and discontinuities due to height differentials
Solution Approach 1:
The patent divides the printing system into multiple independent printing stations, each with its own flexo master configured for specific line widths and orientations. This segmentation allows each station to be optimized independently, eliminating the height differential problem that occurs when a single flexo master attempts to print lines of varying widths with uniform parameters.
Solution Approach 2:
Each printing station is configured with local quality optimizations - flexo masters are specifically designed for their particular line width and orientation requirements, allowing each station to achieve optimal printing parameters tailored to its specific function rather than using universal parameters for all lines.
2Measurement precision
If conventional flexographic printing uses patterned lines with different widths and orientations, then alignment challenges arise, but implementing visual alignment markers adds printing steps
Solution Approach 1:
The patent incorporates alignment markers (alignment boxes and completions) directly into the flexo masters during the master fabrication process. This preliminary action ensures that alignment features are pre-positioned and printed simultaneously with the patterned lines, eliminating the need for separate alignment marking steps and reducing overall system complexity.
3Manufacturing precision
If conventional flexographic printing attempts to print micrometer-fine lines, then alignment precision is required, but height differentials cause discontinuities
Solution Approach 1:
The patent segments the printing of micrometer-fine lines into dedicated printing stations with specialized flexo masters optimized for fine line work. This segmentation ensures that each fine line is printed under controlled, consistent parameters without the interference of height differentials that occur when mixing line widths in a single pass, thereby maintaining pattern continuity and reliability.
Data Source
AI summary
A multi-station flexographic printing system includes a first flexographic printing station that includes a first flexo master. The system includes one or more additional flexographic printing stations, wherein each of the one or more additional flexographic printing stations includes a flexo master. The first flexo master includes one or more alignment boxes in one or more unique positions. Each flexo master of the one or more additional flexographic printing stations includes an alignment box completion in a predetermined position. A method of marking a substrate for visual alignment includes printing one or more alignment boxes in one or more unique positions on a substrate. One or more alignment box completions are printed in one or more predetermined positions on the substrate. The one or more predetermined positions correspond to the one or more unique positions.