Laser beam focusing through the atmosphere aerosol

2017 ◽  
Author(s):  
Alexis V. Kudryashov ◽  
Ilya Galaktionov ◽  
Julia V. Sheldakova ◽  
Vadim Samarkin ◽  
Alexander N. Nikitin
Keyword(s):  
Laser Beam ◽  
Beam Focusing

Laser Failure Isolation Techniques Demonstrated On Test Structures

2008 ◽  
Author(s):  
Frank S. Arnold
Keyword(s):  
Integrated Circuits ◽  
Laser Beam ◽  
Case Studies ◽  
Induced Resistance ◽  
Simple Test ◽  
Resistance Change ◽  
Cross Sectional ◽  
Beam Focusing ◽  
Isolation Techniques ◽  
Heating Effects

Abstract To be better prepared to use laser based failure isolation techniques on field failures of complex integrated circuits, simple test structures without any failures can be used to study Optical Beam Induced Resistance Change (OBIRCH) results. In this article, four case studies are presented on the following test structures: metal strap, contact string, VIA string, and comb test structure. Several experiments were done to investigate why an OBIRCH image was seen in certain areas of a VIA string and not in others. One experiment showed the OBRICH variation was not related to the cooling and heating effects of the topology, or laser beam focusing. A 4 point probe resistance measurement and cross-sectional views correlated with the OBIRCH results and proved OBIRCH was able to detect a variation in VIA fabrication.

scholarly journals Effect of Laser Beam Focusing Adjustment on the Processing Quality of Aluminum Nitride Ceramic Micro-Holes

2021 ◽  
Vol 1865 (2) ◽  
pp. 022004
Author(s):  
Chunyan Yang ◽  
Yun Hao ◽  
Yangping Li ◽  
Bozhe Wang ◽  
Hai Yuan ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Laser Beam ◽  
Processing Quality ◽  
Beam Focusing ◽  
Micro Holes

Laser beam focusing through the scattering medium by means of adaptive optics

2017 ◽  
Author(s):  
Ilya Galaktionov ◽  
Alexis Kudryashov ◽  
Julia Sheldakova ◽  
Alexander Nikitin
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Scattering Medium ◽  
Beam Focusing

Influence of laser-beam focusing on the production of highly charged ions from laser plasma

1996 ◽  
Author(s):  
Leos Laska ◽  
Josef Krasa ◽  
Karel Masek ◽  
Bozena Kralikova ◽  
Tomas Mocek ◽  
...  
Keyword(s):  
Laser Beam ◽  
Laser Plasma ◽  
Highly Charged Ions ◽  
Beam Focusing ◽  
Charged Ions

The use of modified hill-climbing algorithm for laser beam focusing through the turbid medium

2017 ◽  
Author(s):  
Ilya Galaktionov ◽  
Alexis Kudryashov ◽  
Julia Sheldakova ◽  
Alexander Nikitin
Keyword(s):  
Laser Beam ◽  
Turbid Medium ◽  
Hill Climbing ◽  
Beam Focusing ◽  
Hill Climbing Algorithm

Studies on Characteristics of Ti6Al4V/AA2024 Dissimilar Weld Joint Using Laser Beam Focusing from AA2024 Side

2017 ◽  
Vol 70 (8) ◽  
pp. 2147-2153 ◽  
Author(s):  
K. Kalaiselvan ◽  
A. Elango ◽  
N. M. Nagarajan ◽  
K. Sekar
Keyword(s):  
Laser Beam ◽  
Weld Joint ◽  
Dissimilar Weld ◽  
Beam Focusing
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