Study on metal microparticle content of the material transferred with Absorbing Film Assisted Laser Induced Forward Transfer when using silver absorbing layer

Smausz, Tomi; Hopp, B.; Kecskeméti, Gabriella; Bor, Zs.

doi:10.1016/j.apsusc.2005.07.115

Cited by 45 publications

(28 citation statements)

References 18 publications

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“…An image ([1 s) of the blister, rinsed of residual liquid, is shown for reference 2006). In most cases, however, hot fragments of the metal film are incorporated into the ejected material, which can lead to contamination (Smausz et al 2006), and cause pyrolytic damage to sensitive ink materials (Kattamis et al 2009). Furthermore, these hot fragments nucleate micronsized vapor bubbles, which become entrained within the jet (Fig.…”

Section: Comparison Of Ejection Mechanismsmentioning

confidence: 99%

Time-resolved dynamics of laser-induced micro-jets from thin liquid films

Brown

Kattamis

Arnold

2011

Microfluid Nanofluid

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Laser-induced forward transfer (LIFT) is a high-resolution direct-write technique, which can print a wide range of liquid materials without a nozzle. In this process, a pulsed laser initiates the expulsion of a highvelocity micro-jet of fluid from a thin donor film. LIFT involves a novel regime for impulsively driven free-surface jetting in that viscous forces developed in the thin film become relevant within the jet lifetime. In this work, timeresolved microscopy is used to study the dynamics of the laser-induced ejection process. We consider the influence of thin metal and thick polymer laser-absorbing layers on the flow actuation mechanism and resulting jet dynamics. Both films exhibit a mechanism in which flow is driven by the rapid expansion of a gas bubble within the liquid film. We present high-resolution images of the transient gas cavities, the resulting ejection of high aspect ratio external jets, as well as the first images of re-entrant jets formed during LIFT. These observations are interpreted in the context of similar work on cavitation bubble formation near free surfaces and rigid interfaces. Additionally, by increasing the laser beam size used on the polymer absorbing layer, we observe a transition to an alternate mechanism for jet formation, which is driven by the rapid expansion of a blister on the polymer surface. We compare the dynamics of these blister-actuated jets to those of the gas-actuated mechanism. Finally, we analyze these results in the context of printing sensitive ink materials.

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Section: Comparison Of Ejection Mechanismsmentioning

confidence: 99%

Time-resolved dynamics of laser-induced micro-jets from thin liquid films

Brown

Kattamis

Arnold

2011

Microfluid Nanofluid

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“…However, such intermediate absorbing light-to-heat conversion layers could not completely reduce the intrinsically high thermal load on sensitive transfer materials during the thermo-propulsive transfer process [31][32][33][34]. For all these DRL-based LIFT systems, it is important that the decomposition products of such additional intermediate sacrificial absorbing layers will not contaminate the transferred layer, as, e.g., observed for metal absorbing film-assisted (AFA) LIFT methods [25].…”

Section: Introductionmentioning

confidence: 99%

“…1c, such dynamic release layer (DRL) systems serve as energy-absorbing sacrificial layers that decompose upon laser irradiation and provide the thrust for propelling the top layer onto the receiver [17]. The use of thin intermediate films of metals (e.g., Ag, Au, Ti) or metal oxides (e.g., TiO 2 ) has been reported as absorbing layers for UV laser-based forward transfer applications of biomolecules [18][19][20][21] and cells [12,22], in the literature referred to as absorbing film assisted (AFA) LIFT [23][24][25] and Biological Laser Printing (BioLP TM ) [12,26]. Various polymeric composite materials (usually a binder matrix doped with dispersed absorber dyes) have been applied as DRL systems mostly in conjunction with powerful IR lasers, e.g., for highresolution full-color printing [27][28][29] and the microdeposition of electronic materials [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Aryltriazene photopolymer thin films as sacrificial release layers for laser-assisted forward transfer systems: study of photoablative decomposition and transfer behavior

et al. 2008

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Thin films of a tailor-made photodecomposible aryltriazene polymer were applied in a modified laserinduced forward transfer (LIFT) process as sacrificial release layers. The photopolymer film acts as an intermediate energy-absorbing dynamic release layer (DRL) that decomposes efficiently into small volatile fragments upon UV laser irradiation. A fast-expanding pressure jet is generated which is used to propel an overlying transfer material from the source target onto a receiver. This DRL-assisted laser direct-write process allows the precise deposition of intact material pixels with micrometer resolution and by single laser pulses. Triazene-based photopolymer DRL donor systems were studied to derive optimum conditions for film thickness and laser fluences necessary for a defined transfer process at the emission wavelength of a XeCl excimer laser (308 nm). Photoablation, surface detachment, delamination and transfer behavior of aryltriazene polymer films with a thickness from 25 nm to ∼400 nm were investigated in order to improve the process control parameters for the fabrication of functional thin-film devices of microdeposited heat-and UV-sensitive materials.

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“…This method can be used for the transfer of biomaterials and living cells, which could be damaged by direct irradiation of the laser beam [37].…”

Section: Article In Pressmentioning

confidence: 99%