Flexographic Printing Plate Pseudo-Random Tile Pattern
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flexographic printing methods face challenges in printing uniform image regions for functional device patterns, often resulting in defects such as trailing-edge voids, viscous fingering, and pinholes, which can degrade the performance of functional devices like touch screens and antennas.
Innovation Solution
A method for fabricating flexographic printing plates using a repeating tile with pseudo-random feature locations, covering 2-30% of the tile area, applied in a tiled arrangement to uniform image regions, reducing interactions with the periodic cell pattern of anilox rollers and minimizing artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional flexographic printing methods are used to print uniform image regions, then the printing process is simple and fast, but artifacts such as trailing-edge voids, viscous fingering, and pinholes occur
Solution Approach 1:
The patent applies asymmetry by using irregular, non-repeating patterns of raised features in the printing plate instead of conventional regular or dot-based patterns. This asymmetric arrangement of features prevents the formation of periodic artifacts while maintaining uniform ink transfer, directly resolving the contradiction between print uniformity and pattern simplicity
Solution Approach 2:
The patent changes the parameters of the printing plate surface by varying the size, shape, and spatial distribution of raised features within uniform image regions. By adjusting these parameters to create pseudo-random arrangements, the method achieves artifact-free printing while maintaining manufacturing feasibility through computational design
2Manufacturing precision
If regular patterns of raised features are used in flexographic printing plates, then the plate fabrication is straightforward, but interactions with anilox roller cell patterns cause artifacts
Solution Approach 1:
The patent eliminates periodic interactions between the printing plate and anilox roller by using asymmetric, irregular patterns of raised features. This breaks the periodicity that causes moiré effects and artifacts, achieving uniform functional layers while the patterns can be generated algorithmically to maintain manufacturing ease
Solution Approach 2:
The patent applies preliminary computational design to the printing plate pattern before fabrication. By pre-calculating optimal irregular patterns that avoid anilox roller interactions, the method achieves uniform printing results while simplifying the actual manufacturing process, as the complex pattern design is performed computationally rather than mechanically
3Reliability
If pinholes and defects are present in printed functional layers, then the printing process is tolerant of variations, but conductivity and continuity are disrupted
Solution Approach 1:
The patent achieves homogeneous distribution of ink across the printing surface by using uniformly distributed raised features with consistent spacing and morphology. This homogeneous pattern ensures complete and uniform ink transfer, eliminating pinholes and defects that would disrupt the continuity and reliability of conductive functional layers
Data Source
AI summary
A method for fabricating a flexographic printing plate for printing image patterns including one or more uniform image regions includes defining a repeating tile having a pattern of feature shapes positioned at pseudo-random feature locations. A plate formation pattern corresponding to the image pattern is determined wherein the repeating tile is applied in a tiled arrangement to the uniform image regions. The plate formation pattern is used to form a flexographic printing plate, wherein regions of the flexographic printing plate corresponding to the uniform image regions of the image pattern include a pattern of raised features in positions corresponding to the feature positions in the repeating tile.