scholarly journals Effect of Laser Pulse Energy on the Formation of Alumina Nanoparticles Synthesized by Laser Ablation in Water

2012 ◽  
Vol 32 ◽  
pp. 1107-1112 ◽  
Author(s):  
V. Piriyawong ◽  
V. Thongpool ◽  
P. Asanithi ◽  
P. Limsuwan
Keyword(s):  
Laser Ablation ◽  
Laser Pulse ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Alumina Nanoparticles

Evaluation of Alternative Preparation Methods for Failure Analysis at Modern Chip and Package Technologies

2001 ◽  
Author(s):  
A. Dübotzky ◽  
B. Krüger
Keyword(s):  
Laser Ablation ◽  
Laser Pulse ◽  
Failure Analysis ◽  
Pulse Energy ◽  
Repetition Rate ◽  
Pulse Repetition Rate ◽  
Laser Pulse Energy ◽  
Preparation Methods ◽  
Silicon Thickness ◽  
Gold Wires

Abstract We evaluated laser ablation and sandblasting as preparation methods for package related failures and for backside analysis of ICs. With laser ablation we uncovered gold wedges on an internal board of a PLFBGA package without damage of the gold wires and the board metallization. This was possible by optimization of the laser pulse energy and the pulse repetition rate and by limitation of the ablation area. Sandblasting showed to be a gentle way for backside thinning down to 60 μm silicon thickness. For a surface smoothness sufficient for IR imaging a subsequent planarization treatment is necessary.

Surface Morphology of Silicon Induced by Laser Ablation in Flowing Water

2016 ◽  
Vol 861 ◽  
pp. 115-120 ◽  
Author(s):  
Wisan Charee ◽  
Viboon Tangwarodomnukun
Keyword(s):  
Surface Roughness ◽  
Laser Ablation ◽  
Laser Pulse ◽  
Flow Rate ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Water Flow Rate ◽  
Traverse Speed ◽  
Flowing Water ◽  
Cut Surface

Underwater laser machining process has a high potential over the typical laser ablation to remove materials with less thermal damage occurring along the cut. However, the formations of vapor bubble and cut debris in water can substantially disturb the incident laser beam, thereby reducing the ablation performance. Instead of performing the ablation in still water, the flowing water technique was applied to flush away the cut debris and bubble generated. In this study, the effects of laser pulse energy, traverse speed and water flow rate on the cut surface roughness and heat-affected zone in the laser grooving of silicon were experimentally investigated and analyzed. The findings revealed that the cut surface roughness decreased with the increases in laser pulse energy and laser traverse speed. Though a higher water flow rate resulted in a rougher cut surface, the heat-affected zone can be minimized when the increased flow rate was applied.

Effect of Laser Pulse Energy on the Characteristics of Cu Nanoparticles Produced by Laser Ablation Method in Acetone

2014 ◽  
Vol 25 (4) ◽  
pp. 1147-1156 ◽  
Author(s):  
Davoud Dorranian ◽  
Seyedeh Arezoo Ahmadi Afshar ◽  
Negar Tahmasebi ◽  
Atefeh Fotovat Eskandari
Keyword(s):  
Laser Ablation ◽  
Laser Pulse ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Cu Nanoparticles ◽  
Laser Ablation Method

Ultrahigh laser pulse energy and power generation at 10 kHz

2012 ◽  
Vol 37 (15) ◽  
pp. 3231 ◽  
Author(s):  
Frederik Fuest ◽  
Michael J. Papageorge ◽  
Walter R. Lempert ◽  
Jeffrey A. Sutton
Keyword(s):  
Power Generation ◽  
Laser Pulse ◽  
Pulse Energy ◽  
Laser Pulse Energy
Sign in / Sign up

Export Citation Format

Share Document