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Solid Ink Laser Patterning for High-Resolution Information Labels with Supervised Learning Readout
Publikationstyp
Journal Article
Date Issued
2023-04-25
Sprache
German
Author(s)
Journal
Volume
33
Issue
17
Article Number
2210116
Citation
Advanced Functional Materials 33 (17): 2210116 (2023)
Publisher DOI
Scopus ID
ISSN
1616301X
Tagging, tracking, or validation of products are often facilitated by inkjet-printed optical information labels. However, this requires thorough substrate pretreatment, ink optimization, and often lacks in printing precision/resolution. Herein, a printing method based on laser-driven deposition of solid polymer ink that allows for printing on various substrates without pretreatment is demonstrated. Since the deposition process has a precision of <1 µm, it can introduce the concept of sub-positions with overlapping spots. This enables high-resolution fluorescent labels with comparable spot-to-spot distance of down to 15 µm (444,444 spots cm<sup>−2</sup>) and rapid machine learning-supported readout based on low-resolution fluorescence imaging. Furthermore, the defined thickness of the printed polymer ink spots can be used to fabricate multi-channel information labels. Additional information can be stored in different fluorescence channels or in a hidden topography channel of the label that is independent of the fluorescence.
Subjects
inkjet printing
laser-induced forward transfer
machine learning
solvent-free polymer patterning
DDC Class
600: Technology