To fulfil the requirements for high-resolution organic light-emitting diode (OLED) displays, precise and high-quality micrometer-scale patterns have to be fabricated inside metal shadow masks. Invar has been selected for this application due to its unique properties, especially a low coefficient of thermal expansion. In this study, a novel cost-efficient method of multi-beam micromachining of invar will be introduced. The combination of a Meopta beam splitting, focusing and monitoring module with a galvanometer scanner and HiLASE high-energy pulse laser system emitting ultrashort pulses at 515 nm allows drilling and cutting of invar foil with 784 beams at once with high precision and almost no thermal effects and heat-affected zone, thus significantly improving the throughput and efficiency.
|Number of pages||9|
|Publication status||Published - 2 Jul 2020|
Bibliographical note© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
FunderThis work is a result of project TN01000008 NCK CEPO-New methods for laser micromachining. This work was co-financed by the European Regional Development Fund and the state budget of the Czech Republic (project HiLASE CoE: Grant No. CZ.02.1.01/0.0/0.0/15_006/0000674) and from the European Union's Horizon 2020 research and innovation programme (Grant agreement NO 739573) and by the Ministry of Education, Youth and Sports of the Czech Republic (Programme NPU I Project No. LO1602).
- Multi-beam micromachining
- Beam splitting
- Shadow masks
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics