Long-time radiation-resistant optical coatings for UV excimer laser applications

2001 ◽  
Author(s):  
Sven Laux ◽  
Helmut Bernitzki ◽  
Michael Klaus ◽  
Hans Lauth ◽  
Norbert Kaiser
Keyword(s):  
Excimer Laser ◽  
Optical Coatings ◽  
Laser Applications ◽  
Long Time ◽  
Radiation Resistant

Optical Coatings for Excimer Laser Applications

2005 ◽  
pp. 119-126
Author(s):  
N. Kaiser ◽  
H. Lauth ◽  
H. Bernitzki
Keyword(s):  
Excimer Laser ◽  
Optical Coatings ◽  
Laser Applications

scholarly journals Absolute Absorption Measurements in Optical Coatings by Laser Induced Deflection

Coatings ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 473 ◽  
Author(s):  
Simon Bublitz ◽  
Christian Mühlig
Keyword(s):  
High Sensitivity ◽  
Absolute Measurement ◽  
Deposition Process ◽  
Intense Laser ◽  
Optical Coatings ◽  
Absolute Calibration ◽  
Laser Applications ◽  
Experimental Findings ◽  
Thermal Absorption ◽  
Absorption Measurements

Absolute measurement of residual absorption in optical coatings is steadily becoming more important in thin film characterization, in particular with respect to high power laser applications. A summary is given on the current ability of the laser induced deflection (LID) technique to serve sensitive photo-thermal absorption measurements combined with reliable absolute calibration based on an electrical heater approach. To account for different measurement requirements, several concepts have been derived to accordingly adapt the original LID concept. Experimental results are presented for prominent UV and deep UV laser wavelengths, covering a variety of factors that critically can influence the absorption properties in optical coatings e.g., deposition process, defects and impurities, intense laser irradiation and surface/interface engineering. The experimental findings demonstrate that by combining high sensitivity with absolute calibration, photo-thermal absorption measurements are able to be a valuable supplement for the characterization of optical thin films and coatings.

Pulse stretcher with variable pulse length for excimer laser applications

2010 ◽  
Vol 81 (3) ◽  
pp. 033104 ◽  
Author(s):  
A. Burkert ◽  
J. Bergmann ◽  
W. Triebel ◽  
U. Natura
Keyword(s):  
Excimer Laser ◽  
Pulse Length ◽  
Laser Applications

Excimer laser applications in angioplasty, urology, and dentistry

1990 ◽  
Author(s):  
Roberto Pini ◽  
Renzo Salimbeni ◽  
Matteo Vannini ◽  
A. Guasti ◽  
Riccardo Viligiardi ◽  
...  
Keyword(s):  
Excimer Laser ◽  
Laser Applications

scholarly journals Radiation Shielding Properties Prediction of Barite used as Small Aggregate in Mortar

2020 ◽  
Vol 10 (6) ◽  
pp. 6469-6475
Author(s):  
H. Q. Vu ◽  
V. H. Tran ◽  
P. T. Nguyen ◽  
N. T. H. Le ◽  
M. T. Le
Keyword(s):  
Radiation Resistance ◽  
Construction Materials ◽  
Cost Effective ◽  
Radiation Shielding ◽  
Nuclear Industry ◽  
Barium Compounds ◽  
Long Time ◽  
Radiation Resistant ◽  
Shielding Properties ◽  
Materials Used

Construction materials used in the nuclear industry used to be mainly heavy materials, including lead plates, radiation-resistant heavy concrete, etc. However, these materials are either toxic after a long time of use (lead) or difficult to construct (radiation-resistant heavy concrete) and their cost is rather high. Therefore, there is a need for the manufacturing of a new kind of material with good radiation resistance, which is light, easy to use, and costs less. Barium is less toxic and more cost-effective than lead. Due to the importance of barium compounds in radiation shielding, the study of gamma radiation interactions within these compounds becomes essential, so the most important part of such a study is the experimental one, which shows the effect of the barite powder in the radiation resistance of the mortar. The research results show that the higher the thickness and percentage of barite powder, the higher is the radiation resistance.

Improved UV-fiber for 193-nm excimer laser applications

1996 ◽  
Author(s):  
Peter Karlitzschek ◽  
Karl-Friedrich Klein ◽  
Georg Hillrichs ◽  
Ulrich Grzesik
Keyword(s):  
Excimer Laser ◽  
Laser Applications ◽  
193 Nm

Excimer Laser Applications in Integrated Circuit Packaging

1995 ◽  
Vol 397 ◽  
Author(s):  
Y. F. Lu ◽  
M. H. Hong ◽  
D. S. H. Chan ◽  
T. S. Low
Keyword(s):  
Excimer Laser ◽  
Integrated Circuit ◽  
Laser Processing ◽  
High Efficiency ◽  
Laser Applications ◽  
Excimer Laser Ablation ◽  
Short Period ◽  
Hydrogen Flame ◽  
Short Time ◽  
Selection Of

ABSTRACTExcimer laser ablation is applied in the deflashing and demarking of IC packages. It is found that mold flash filled in the interface holes of IC leadframe can be removed completely by the laser deflashing in a short period of time. With appropriate selection of laser parameters, deflashing quality and efficiency can be greatly improved. The laser deflashing is more efficient for higher pin count packages. It is a superior alternative in future applications. In laser demarking, ink marks on package surfaces can also be removed completely in a short time. The surface after the processing has good conditions for remarking. The package remarking shows good permanency. The lifetime for good marking is much longer for IC packages after the laser demarking than those after hydrogen flame-off. Laser processing can be used to replace hydrogen flame-off in the ink printing of IC packages for high efficiency and safety.

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