Direct Laser Writing of Copper Micropatterns from Deep Eutectic Solvents Using Pulsed near-IR Radiation

Abstract

In this study, we developed a method for the fabrication of electrically conductive copper patterns of arbitrary topology and films on dielectric substrates, by improved laser-induced synthesis from deep eutectic solvents. A significant increase in the processing efficiency was achieved by acceptor substrate pretreatment, with the laser-induced microplasma technique, using auxiliary glass substrates and optional laser post-processing of the recorded structures; thus, the proposed approach offers a complete manufacturing cycle, utilizing a single, commercially available, pulsed Yb fiber laser system. The potential implications of the presented research are amplified by the observation of laser-induced periodic surface structures (LIPSSs) that may be useful for the further tuning of tracks’ functional properties.

Commercial-Grade Dielectrics Surface Metallization by Direct Laser Deposition from Deep Eutectic Solvents

“…Subsequently, a 1 mm thick layer of DES was applied to the substrates. Previously, it was found that placing an auxiliary glass slab onto the DES layer to create a “sandwich” sample was effective for laser-induced synthesis in DES . In this study, the same design was used for borosilicate glass, PI, and fiberglass plastic.…”

“…A detailed description of this procedure can be found elsewhere. 45 Fiberglass plastic and PTFE substrates were structured using 320 P sandpaper (Ra ∼ 7 μm). The alternative technique was chosen as the materials are not optically transparent for the wavelength used and the LIPAA method cannot be realized.…”

“…Previously, it was found that placing an auxiliary glass slab onto the DES layer to create a "sandwich" sample was effective for laser-induced synthesis in DES. 45 In this study, the same design was used for borosilicate glass, PI, and fiberglass plastic. Finally, the prepared sample was positioned in the processing plane of a MiniMarker-2 (Laser Center LLC, St. Petersburg, Russia) Yb-fiber laser setup and irradiated by a laser beam with a wavelength of 1070 nm, a pulse duration of 200 ns, a pulse repetition rate of 20 kHz, an average power of up to 20 W, and scanning speeds ranging from 0.05 to 8000 mm/s.…”

Fabrication of copper patterns on industrial-used dielectric substrates by direct laser metallization from deep eutectic solvents

“…However, in that work, CW laser was applied and in the treatment of polymer materials, a significant temperature effect led to melting or graphitization of the surface. In [45] an effective solution for metallization of glass surfaces was achieved by using a commercially available MiniMarker-2, however, the applicability of the developed methods for wider substrate materials range remained unknown.…”

Laser-Induced Synthesis of Electrocatalytically Active Ag, Pt, and AgPt/Polyaniline Nanocomposites for Hydrogen Evolution Reactions

“…The method is based on the photochemical decomposition of the metal-containing precursor under laser irradiation, followed by reduction of the metal and the formation of NPs [ 31 ]. As possible precursors, an extensive list of laboratory-synthesized and commercially available compounds were successfully demonstrated, such as organometallic complexes, inorganic, and organic salts [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. It was found that LID allows the user to control the coating density, morphology, and composition of the MNPs deposited on the substrate’s surface.…”