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13 March 2019 Increasing the resolution of the Laser-Induced Forward Transfer using flow-focusing (Conference Presentation)
Emre Turkoz, SeungYeon Kang, Xiaohan Du, Luc Deike, Craig B. Arnold
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Proceedings Volume 10905, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIV; 109050L (2019) https://doi.org/10.1117/12.2512297
Event: SPIE LASE, 2019, San Francisco, California, United States
Abstract
Drop-on-demand jet-based printing and deposition techniques benefit from increased printing resolution compared to inkjet printing. In this study, we present two sets of methods to improve the printing resolution and decrease the laser transfer threshold energy for blister-actuated laser-induced forward transfer (BA-LIFT). In one technique, we examine the steady meniscus formation by fabricating micrometer-sized holes onto the solid polyimide thin film substrate which hosts the donor liquid ink film to be printed. Due to the micrometer size of holes, surface tension effects are enhanced, a steady meniscus is formed at the air-ink interface, and the resulting focused jets are thinner and faster than regular jets. In the other set of techniques, we examine the transient meniscus formation by using Faraday waves to induce a transient meniscus at the air-ink interface. We show that focused jets may have different features compared to regular jets depending on the focusing method. We demonstrate experimentally and computationally that steady and transient meniscus formation enable jetting at lower laser pulse energies and leads to the ejection of smaller droplets.
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Emre Turkoz, SeungYeon Kang, Xiaohan Du, Luc Deike, and Craig B. Arnold "Increasing the resolution of the Laser-Induced Forward Transfer using flow-focusing (Conference Presentation)", Proc. SPIE 10905, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIV, 109050L (13 March 2019); https://doi.org/10.1117/12.2512297
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KEYWORDS
Printing
Inkjet technology
Laser energy
Interfaces
Fabrication
Laser damage threshold
Liquids
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