Fundamentals of Nd:YAG Laser Applications

Fuchs, B.; Berlien, H.-P.; Philipp, C.; Müller, G.

doi:10.1007/978-3-642-18979-1_6

Cited by 2 publications

(3 citation statements)

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“…A similar trend in the processing window for DLW was observed when an 808 nm wavelength laser is used; below 1.0 W laser irradiated areas have insufficient reduction of copper ions and remain non-conductive, and above 4.5 W heating effects from laser irradiating cause damage to the substrate [11]. Here, fiber laser with 1064 nm wavelength shows a slightly lower damage threshold due to its larger heating effect compared to 808 nm [22]. Asides from laser power, laser scan speed can also alter the properties of as written structures.…”

Section: Resultssupporting

confidence: 57%

“…In DLW, research has yet to demonstrate if a longer wavelength laser with a larger heating effect can control the properties of different Cu flexible components. Furthermore, infrared and near-infrared lasers represent a large portion of laser systems currently in use in many laser fabrication industries [22]. Extending the DLW to a nearinfrared laser has the potential to demonstrate further industrial viability of the process.…”

Section: Introductionmentioning

confidence: 99%

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Direct laser writing of copper and copper oxide structures on plastic substrates for memristor devices

Jones

Snowdon

Rathod

et al. 2023

Flex. Print. Electron.

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Rapid fabrication of flexible electronics is attracting much attention in many industries. There is a need for rapidly producing flexible electronic components without the reliance on costly precursor materials and complex processes. In this work, a direct laser writing process is presented as capable of rapidly depositing flexible copper or copper oxide structures with a high degree of control over electrical properties. The direct laser writing process uses a low-power fiber laser beam to selectively irradiate a thin film of copper ions to form and interconnect copper nanoparticles. The electrical properties of the deposited patterns can be controlled through tuning laser power, scanning speed, and beam defocus. The microstructures of patterns printed at varying laser powers are investigated using SEM, XPS, and XRD and the relation between laser power and sheet resistance is explored. The results showed that high laser energy densities resulted in highly conductive patterns of metallic copper, whereas lower energy patterns resulted in copper oxide rich patterns with significantly lower conductivity. This method can produce high-quality flexible electronic components with a range of potential applications, as demonstrated by the proof-of-concept fabrication of a flexible memristive junction with resistive switching observed at +/- 0.7V, and a Ron/Roff ratio of 10^2.

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Section: Resultssupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Direct laser writing of copper and copper oxide structures on plastic substrates for memristor devices

Jones

Snowdon

Rathod

et al. 2023

Flex. Print. Electron.

View full text Add to dashboard Cite

show abstract

“…2 a). To prevent unnecessary thermal injury to the surrounding tissues upon initial activation of the laser, the tip was first carbonized by holding it on a wooden spatula [ 23 , 24 ]. After bouginage of either tear dot, the fiber was inserted and carefully pushed into the lacrimal sac.…”

Section: Methodsmentioning

confidence: 99%

Transcanalicular laser dacryocystorhinostomy for acquired nasolacrimal duct obstruction: an audit of 104 patients

et al. 2018

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PurposeExternal dacryocystorhinostomy (DCR) is considered as the gold standard in the treatment of acquired nasolacrimal duct obstruction. However, many advances have been made towards the development of modern minimally invasive therapies. These new techniques were proven less harmful to the patients’ skin and medial palpebral structures with their palpebral-canalicular pump mechanism. Options include endonasal and transcanalicular procedures. Here, we report on our 2-year experience with the surgical technique, results and complications of transcanalicular laser-assisted DCR.MethodsThis is a retrospective study. A total of 104 patients with acquired nasolacrimal duct obstruction underwent transcanalicular laser-assisted DCR combined with bicanalicular silicon intubation. We then analyzed intra-/post-operative complications and subjective and objective success rates. The institutional ethics committee ruled that approval was not necessary. The trial was registered with the German Clinical Trials Register (DRKS00012879).ResultsTranscanalicular laser-assisted DCR in combination with bicanalicular silicon intubation could be performed surgically successfully in 101 patients (97%). In three cases (3%) using the superior canalicular approach, positioning of the laser instrument at the anteroinferior rim of the middle turbinate failed. Complications included thermal injury to the canaliculus (one), canalicular infection (two) and silicon tube prolapse (ten). Functional success (resolution of preoperative symptoms) was achieved in 80 cases (77%), functional failure occured in 24 cases with all patients reporting persisting epiphora, 15 reporting failure to irrigate the nasolacrimal duct and 15 requiring secondary external DCR.ConclusionsLaser-assisted DCR shows promising results with few complications. It seems well suited as a second-step procedure after failed recanalization and before external DCR.

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Fundamentals of Nd:YAG Laser Applications

Cited by 2 publications

References 0 publications

Direct laser writing of copper and copper oxide structures on plastic substrates for memristor devices

Direct laser writing of copper and copper oxide structures on plastic substrates for memristor devices

Transcanalicular laser dacryocystorhinostomy for acquired nasolacrimal duct obstruction: an audit of 104 patients

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