Generation of Shock Waves in Confined Excimer Laser Ablation of Polyimide

1991 ◽  
Vol 236 ◽  
Author(s):  
Adrian D. Zweig ◽  
T.F. Deutsch
Keyword(s):  
Laser Ablation ◽  
Simple Model ◽  
Optical Probe ◽  
Ideal Gas ◽  
Shock Pressure ◽  
Square Root ◽  
Surrounding Water ◽  
Excimer Laser Ablation ◽  
Probe System ◽  
Peak Shock

AbstractWe study acoustic effects associated with the ablation of polyimide under water confinement. Ablation launches a shock in the target. After the shock propagates into the surrounding water we measure its velocity with an optical probe system. In the water the shocks decay after propagating a few hundred microns. The peak shock pressure scales with the square root of the laser fluence. Our observations can be explained by a simple model that interprets the generated pressures as being due to the heating of a confined ideal gas.

Picosecond UV Excimer Laser Ablation of LiNbO3

1990 ◽  
Vol 191 ◽  
Author(s):  
Th. Beuermann ◽  
H. J. Brinkmann ◽  
T. Damm ◽  
M. Stuke
Keyword(s):  
Laser Ablation ◽  
Simple Model ◽  
Lithium Niobate ◽  
Excimer Laser ◽  
Material Removal ◽  
Etch Rate ◽  
Laser Pulses ◽  
Picosecond Pulses ◽  
Excimer Laser Ablation ◽  
Order Of Magnitude

ABSTRACTUltrashort UV excimer laser ablation of materials shows several advantages over conventional UV excimer laser ablation. We describe new experimental results on lithium niobate, LiNbO3, using 308 nm pulses of 1 ps duration. The fluence threshold for material removal is reduced by one order of magnitude when compared with 16 ns pulses at 308 nm. In addition the etch rate is up to three times higher for picosecond pulses and it is independent of the diameter of the ablation area. We discuss a simple model describing the etching and ablation behaviour of materials upon interaction with UV excimer laser pulses of different pulse duration.

Photoacoustic injury and bone healing following 193nm excimer laser ablation

1992 ◽  
Vol 12 (4) ◽  
pp. 390-396 ◽  
Author(s):  
Joshua Lustmann ◽  
Mario Ulmansky ◽  
Amihay Fuxbrunner ◽  
Aaron Lewis
Keyword(s):  
Laser Ablation ◽  
Excimer Laser ◽  
Bone Healing ◽  
Excimer Laser Ablation

Excimer-laser ablation and micro-patterning of ceramic Si 3 N 4

1997 ◽  
Vol 65 (3) ◽  
pp. 259-261 ◽  
Author(s):  
J. Heitz ◽  
J.D. Pedarnig ◽  
D. Bäuerle ◽  
G. Petzow
Keyword(s):  
Laser Ablation ◽  
Excimer Laser ◽  
Excimer Laser Ablation ◽  
Micro Patterning

scholarly journals Preparation and Properties of Superconducting thin Films by Excimer Laser Ablation

1990 ◽  
Vol 191 ◽  
Author(s):  
Michael E. Geusic ◽  
Alan F. Stewart ◽  
Larry R. Pederson ◽  
William J. Weber ◽  
Kenneth R. Marken ◽  
...  
Keyword(s):  
Thin Films ◽  
Laser Ablation ◽  
Excimer Laser ◽  
Laser Energy ◽  
Substrate Surface ◽  
Xrd Analysis ◽  
Zero Field ◽  
Superconducting Transition ◽  
X Ray Diffraction ◽  
Excimer Laser Ablation

ABSTRACTExcimer laser ablation with an in situ heat treatment was used to prepare high quality superconducting YBa2Cu3O7−x thin films on (100)-SrTiO3 and (100)-LaAlO3 substrates. A pulsed excimer laser (XeCl; 308 nm) was used to ablate a rotating, bulk YBa2Cu3O7−x target at a laser energy density of 2–3 J/cm2. Based on four-probe dc resistance measurements, the films exhibited superconducting transition temperatures (Tc, midpoint) of 88 and 87K with 2K (90–10%) transition widths for SrTiO3 and LaAlO3, respectively. Transport critical current densities (Jc) measured at 77K were 2 × 106 and 1 × 106 A/cm2 in zero field for SrTiO3 and LaAlO3, respectively. X-ray diffraction (XRD) analysis showed the films to be highly oriented, with the c-axis perpendicular to the substrate surface.

Deposition of polyphenylene sulphide (PPS) polymer by pulsed excimer laser ablation

1992 ◽  
Vol 15 (4) ◽  
pp. 260-263 ◽  
Author(s):  
Sangeeta Kale ◽  
S.B. Ogale ◽  
J.P. Jog ◽  
V.M. Nadkarni
Keyword(s):  
Laser Ablation ◽  
Excimer Laser ◽  
Excimer Laser Ablation ◽  
Polyphenylene Sulphide
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