Holes generation in glass using large spot femtosecond laser pulses

Berg, Yuval; Kotler, Zvi; Shacham‐Diamand, Yosi

doi:10.1088/1361-6439/aaa780

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…Adhesion of pure metals to nonmetallic surfaces is a well-known challenge. In some studies, chemical etching or laser micromachining treatment is used to produce roughness or trenches [35] to improve the adhesion. However, in some applications, the substrate is extremely delicate [15] or presents pre-existing features, and such a treatment is not desirable.…”

Section: Resultsmentioning

confidence: 99%

Direct Writing of High‐Resolution, High‐Quality Pure Metal Patterns on Smooth Transparent Substrates by Laser‐Induced Forward Transfer Followed by a Novel Laser Treatment

Sammartino

Cohen²,

Kotler³

et al. 2021

Adv Eng Mater

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Additive manufacturing of high‐resolution conductive metallic patterns is the current focus of interest for several different applications. The print of sensors, antennas, and screens on transparent materials enables the manufacture of smart structural electronics. Laser‐induced forward transfer (LIFT) is a direct write technique capable of depositing microdroplets of metals from the solid phase by means of laser irradiation. Patterns are achieved by printing drops in a sequential fashion. Due to high heat conductivity of metals, droplets solidify before smearing; therefore, LIFT‐printed structures exhibit high surface roughness, which harms their functioning and limits their applications. Herein, a new procedure is developed for the fabrication of continuous metallic lines at the micrometer resolution on smooth transparent substrates, using a combination of subnanosecond LIFT and a laser melting post‐treatment. The melting process is conducted using laser pulses with the timescale of a microsecond. It is shown how one can find an optimized melting process to achieve smooth lines, without introducing oxidation or balling effect. In addition, choosing the proper alloy ensures strong adhesion of the printed structure.

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Section: Resultsmentioning

confidence: 99%

Direct Writing of High‐Resolution, High‐Quality Pure Metal Patterns on Smooth Transparent Substrates by Laser‐Induced Forward Transfer Followed by a Novel Laser Treatment

Sammartino

Cohen²,

Kotler³

et al. 2021

Adv Eng Mater

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“…The microperforation using femtosecond laser is not only obtained on the hard materials [91,92] but also realized on the flexible substrates [93,94]. For instance, as shown in Figures 4(b) and 4(c), Wang et al created the microperforation on a bioresponsive film to imitate the structure of the endothelial cell basement membrane for vessel development, which can be used for vascular tissue engineering applications [95].…”

Section: Femtosecond Laser Inscription and Perforationmentioning

confidence: 99%

Femtosecond Laser Precision Engineering: From Micron, Submicron, to Nanoscale

2021

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As a noncontact strategy with flexible tools and high efficiency, laser precision engineering is a significant advanced processing way for high-quality micro-/nanostructure fabrication, especially to achieve novel functional photoelectric structures and devices. For the microscale creation, several femtosecond laser fabrication methods, including multiphoton absorption, laser-induced plasma-assisted ablation, and incubation effect have been developed. Meanwhile, the femtosecond laser can be combined with microlens arrays and interference lithography techniques to achieve the structures in submicron scales. Down to nanoscale feature sizes, advanced processing strategies, such as near-field scanning optical microscope, atomic force microscope, and microsphere, are applied in femtosecond laser processing and the minimum nanostructure creation has been pushed down to ~25 nm due to near-field effect. The most fascinating femtosecond laser precision engineering is the possibility of large-area, high-throughput, and far-field nanofabrication. In combination with special strategies, including dual femtosecond laser beam irradiation, ~15 nm nanostructuring can be achieved directly on silicon surfaces in far field and in ambient air. The challenges and perspectives in the femtosecond laser precision engineering are also discussed.

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“…Among a variety of surface modification techniques, the ultrafast laser modification technique has emerged as one of the best for forming ordered surface patterns, increasing surface roughness, changing composition, and functionalizing and forming a thin film [23]. This technique is suitable for the fabrication of bioactive surfaces on stents, bone implants, and biofilms [24][25][26]. The energy of laser radiation can be focused on the surface and can modify only selected areas, triggering the transformation of hardening, surface melting, surface oxidation, and/or surface alloying [27].…”

Section: Introductionmentioning

confidence: 99%

Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems

et al. 2023

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Arranged patterns obtained via ultrafast laser processing on the surface of Ti/Cu/Ti/Si and Ti/Zr/Ti/Si thin-film systems are reported. Two differently designed multilayer thin films Ti/Cu/Ti/Si and Ti/Zr/Ti/Si were deposited on silicon using the ion sputtering method. The bioactive surfaces of these systems involve the formation of laser-induced periodic surface structures (LIPSS) in each of the laser-written lines of mesh patterns on 5 × 5 mm areas. The formation of nano- and micro-patterns with an ultra-thin oxide film on the surfaces was used to observe the effects of morphology and proliferation of the MRC-5 cell culture line. To determine whether Ti-based thin films have a toxic effect on living cells, an MTT assay was performed. The relative cytotoxic effect, as a percentage of surviving cells, showed that there was no difference in cell number between the Ti-based thin films and the control cells. There was also no difference in the viability of the MRC-5 cells, except for the Ti/Cu/Ti/Si system, where there was a slight 10% decrease in cell viability.

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Holes generation in glass using large spot femtosecond laser pulses

Cited by 8 publications

References 30 publications

Direct Writing of High‐Resolution, High‐Quality Pure Metal Patterns on Smooth Transparent Substrates by Laser‐Induced Forward Transfer Followed by a Novel Laser Treatment

Direct Writing of High‐Resolution, High‐Quality Pure Metal Patterns on Smooth Transparent Substrates by Laser‐Induced Forward Transfer Followed by a Novel Laser Treatment

Femtosecond Laser Precision Engineering: From Micron, Submicron, to Nanoscale

Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems

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