Laser Printing Circuit Boards and Electronics

Jones, Jason B.; Büttner, Dustin; Chudasama, Rupesh; Wimpenny, D. I.; Krüger, Klaus

doi:10.2352/j.imagingsci.technol.2012.56.4.040503

Cited by 2 publications

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“…inconsistencies, and relatively low-material-deposition rates. [25,26] Among the different printing technologies developed, laser printing provides advantages such as a micrometric spatial resolution, [27][28][29][30] and a fast processing speed. [31,32] The technique is based on the irradiation of the deposited ink with a tightly focused laser beam.…”

Section: Introductionmentioning

confidence: 99%

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

et al. 2023

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Pronounced magnetocaloric effects are typically observed in materials that often contain expensive and rare elements and are therefore costly to mass produce. However, they can rather be exploited on a small scale for miniaturized devices such as magnetic micro coolers, thermal sensors, and magnetic micropumps. Herein, a method is developed to generate magnetocaloric microstructures from an equiatomic iron–rhodium (FeRh) bulk target through a stepwise process. First, paramagnetic near‐to‐equiatomic solid‐solution FeRh nanoparticles (NPs) are generated through picosecond (ps)‐pulsed laser ablation in ethanol, which are then transformed into a printable ink and patterned using a continuous wave laser. Laser patterning not only leads to sintering of the NP ink but also triggers the phase transformation of the initial γ‐ to B2‐FeRh. At a laser fluence of 246 J cm−2, a partial (52%) phase transformation from γ‐ to B2‐FeRh is obtained, resulting in a magnetization increase of 35 Am2 kg−1 across the antiferromagnetic to ferromagnetic phase transition. This represents a ca. sixfold enhancement compared to previous furnace‐annealed FeRh ink. Finally, herein, the ability is demonstrated to create FeRh 2D structures with different geometries using laser sintering of magnetocaloric inks, which offers advantages such as micrometric spatial resolution, in situ annealing, and structure design flexibility.

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Section: Introductionmentioning

confidence: 99%

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

et al. 2023

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Direct Toner Printing: A Versatile Technology for Easy Fabrication of Flexible Miniaturized Electrodes

2017

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We reported here three simple, low cost and easy to accomplish strategies for the fabrication of microelectrodes and other conductive patterns using ordinary office laser‐printers. In this work, toner patterns were directly printed onto the flexible substrate, acting as a mask to create the intended conductive design. To highlight the versatility of such technology, toner‐printed patterns were employed in two diverse ways: one in which the patterned toner had the exact design of the electrode and other employing a reverse toner‐printed pattern. The first one was used for the adaptation of the well‐known printed circuit board (PCB) fabrication technique, but using direct toner printing (DTP) in an already conductive flexible substrate. The second was employed for the two remaining strategies: one based on the deposition of conductive film, followed by lift‐off process; and another based on drop‐casting of a conductive ink into the formed toner cavities, followed by thermal cure. As proof‐of‐concept, all three DTP strategies were used for the fabrication of miniaturized gold electrodes in polyimide substrate, and electrochemical performance of each obtained electrode was evaluated by cyclic voltammetry. Insights about DTP technology, alignment issues, advantages, limitations and resolution of each presented approach were provided. Finally, direct toner printing showed to be a simple, affordable and quite promising technology for the fabrication of low cost point‐of‐care electrochemical devices using flexible platforms.

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Laser Printing Circuit Boards and Electronics

Cited by 2 publications

References 0 publications

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

Development of Magnetocaloric Microstructures from Equiatomic Iron–Rhodium Nanoparticles through Laser Sintering

Direct Toner Printing: A Versatile Technology for Easy Fabrication of Flexible Miniaturized Electrodes

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