Thermocapillary Effects in Laser Direct-Write Metallization

1990 ◽  
Vol 201 ◽  
Author(s):  
Peter E. Price ◽  
Michael Stuke ◽  
Klavs F. Jensen
Keyword(s):  
Thin Films ◽  
Free Surface ◽  
Qualitative Agreement ◽  
Experimental Results ◽  
Palladium Acetate ◽  
Direct Write ◽  
Marangoni Flow ◽  
Direct Writing ◽  
Surface Profiles ◽  
Laser Direct Write

AbstractA model describing melting and thermocapillary (or Marangoni) flow in laser irradiated thin films is presented. The free surface formulation leads to predictions of surface profiles that are in qualitative agreement with experimental observations. Additional experimental results for direct-writing of palladium from palladium acetate films demonstrate the influence of thermocapillary effects on the dynamics of the process.

Free Surface of a Rotating HeII Film

1973 ◽  
Vol 51 (21) ◽  
pp. 2283-2286 ◽  
Author(s):  
E. Vittoratos ◽  
M. W. Cole ◽  
P. P. M. Meincke
Keyword(s):  
Thin Films ◽  
Free Surface ◽  
Superfluid Helium ◽  
Vortex Line ◽  
Rotational Frequency ◽  
Experimental Results ◽  
Quantized Vortex ◽  
Bulk Liquid ◽  
Vapor Interface ◽  
Vortex Lines

Stimulated by recent conflicting experimental results, we have investigated the properties of quantized vortex lines in thin films of superfluid helium. The shape of the liquid–vapor interface in the presence of a single line is calculated. The depression of the interface ("dimple") that results is considerably smaller for the film than for the bulk liquid. The critical rotational frequency for the appearance of the first vortex line is only slightly reduced below the bulk value.

Laser direct‐write metallization in thin palladium acetate films

1987 ◽  
Vol 61 (4) ◽  
pp. 1628-1632 ◽  
Author(s):  
M. E. Gross ◽  
A. Appelbaum ◽  
P. K. Gallagher
Keyword(s):  
Palladium Acetate ◽  
Direct Write ◽  
Laser Direct Write

F-Doped carbon nano-onion films as scaffold for highly efficient and stable Li metal anodes: a novel laser direct-write process

Nanoscale ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 7630-7638 ◽  
Author(s):  
Dhanya Puthusseri ◽  
Malik Wahid ◽  
Aniruddha Basu ◽  
Rohit Babar ◽  
Mukul Kabir ◽  
...  
Keyword(s):  
Low Voltage ◽  
Direct Write ◽  
High Current ◽  
Direct Writing ◽  
Metal Anode ◽  
Long Cycle Life ◽  
Li Metal Anode ◽  
Voltage Hysteresis ◽  
Cu Foil ◽  
Laser Direct Write

Direct writing of a fluorine-doped curved carbon nano-onion film on a Cu foil renders the Li metal anode with long cycle life, high Li-plating capacity, low-voltage hysteresis, and improved high current performance.

MAPLE Direct Write (DW) patterning of Bio-active Ceramic Nanocomposites

2004 ◽  
Vol 845 ◽  
Author(s):  
A. Doraiswamy ◽  
T. M. Patz ◽  
R. J. Narayan ◽  
L. Harris ◽  
R. Auyeung ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Live Cells ◽  
Direct Write ◽  
Direct Writing ◽  
Cad Cam ◽  
A Cell ◽  
Novel Method ◽  
Heterogeneous Tissue ◽  
Laser Direct Write ◽  
Hydroxyl Apatite

ABSTRACTA laser-based approach, Matrix Assisted Pulsed Laser Direct Write (MAPLE) technique is used to demonstrate two-dimensional direct writing of ceramics such as hydroxyl-apatite and zirconia, for developing inorganic scaffolds. We also demonstrate the patterning of live MG63 osteoblast cells onto various substrates. Our results show successful direct writing of ceramics and live cells concurrently, with a growth profile similar to that of as-deposited cells. After several days of growth, a live/dead assay shows live cells suggesting the biocompatibility of the ceramic and the viability of the process. This investigation demonstrates a novel method of developing heterogeneous tissue scaffolds, such as a cell-ceramic composite by CAD/CAM patterns.

Synthesis of Nanocomposite thin film Ti/Al Multilayers and Ti-Aluminides

1996 ◽  
Vol 457 ◽  
Author(s):  
R. Banerjee ◽  
X. D. Zhang ◽  
S. A. Dregia ◽  
H. L. Fraser
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetron Sputtering ◽  
Layer Thickness ◽  
Thermodynamic Model ◽  
Interfacial Reactions ◽  
Experimental Results ◽  
Structural Transitions ◽  
Nanocomposite Thin Film ◽  
Multilayered Thin Films

ABSTRACTNanocomposite Ti/Al multilayered thin films have been deposited by magnetron sputtering. These multilayers exhibit interesting structural transitions on reducing the layer thickness of both Ti and Al. Ti transforms from its bulk stable hep structure to fee and Al transforms from fee to hep. The effect of ratio of Ti layer thickness to Al layer thickness on the structural transitions has been investigated for a constant bilayer periodicity of 10 nm by considering three different multilayers: 7.5 nm Ti / 2.5 nm Al, 5 nm Ti / 5 nm Al and 2.5 nm Ti / 7.5 nm Al. The experimental results have been qualitatively explained on the basis of a thermodynamic model. Preliminary experimental results of interfacial reactions in Ti/Al bilayers resulting in the formation of Ti-aluminides are also presented in the paper.

Redistribution of pads on a singulated IC die using laser direct-write ablation

2006 ◽  
Vol 29 (1) ◽  
pp. 184-189
Author(s):  
Chengping Zhang ◽  
R. Bartholomew ◽  
P.C. Karulkar
Keyword(s):  
Direct Write ◽  
Laser Direct Write

scholarly journals Mathematical modelling of the overflowing cylinder experiment

2003 ◽  
Vol 474 ◽  
pp. 275-298 ◽  
Author(s):  
P. D. HOWELL ◽  
C. J. W. BREWARD
Keyword(s):  
Free Surface ◽  
Surfactant Concentration ◽  
Dynamic Properties ◽  
Vertical Cylinder ◽  
Surfactant Solution ◽  
Surface Concentration ◽  
Experimental Results ◽  
Surface Velocity ◽  
Experimental Apparatus ◽  
Finite Distance

The overflowing cylinder (OFC) is an experimental apparatus designed to generate a controlled straining flow at a free surface, whose dynamic properties may then be investigated. Surfactant solution is pumped up slowly through a vertical cylinder. On reaching the top, the liquid forms a flat free surface which expands radially before over flowing down the side of the cylinder. The velocity, surface tension and surfactant concentration on the expanding free surface are measured using a variety of non-invasive techniques.A mathematical model for the OFC has been previously derived by Breward et al. (2001) and shown to give satisfactory agreement with experimental results. However, a puzzling indeterminacy in the model renders it unable to predict one scalar parameter (e.g. the surfactant concentration at the centre of the cylinder), which must be therefore be taken from the experiments.In this paper we analyse the OFC model asymptotically and numerically. We show that solutions typically develop one of two possible singularities. In the first, the surface concentration of surfactant reaches zero a finite distance from the cylinder axis, while the surface velocity tends to infinity there. In the second, the surfactant concentration is exponentially large and a stagnation point forms just inside the rim of the cylinder. We propose a criterion for selecting the free parameter, based on the elimination of both singularities, and show that it leads to good agreement with experimental results.

Picoliter-Scale Protein Microarrays by Laser Direct Write

2002 ◽  
Vol 18 (5) ◽  
pp. 1126-1129 ◽  
Author(s):  
B.R. Ringeisen ◽  
P.K. Wu ◽  
H. Kim ◽  
A. Pique ◽  
R.Y.C. Auyeung ◽  
...  
Keyword(s):  
Protein Microarrays ◽  
Direct Write ◽  
Laser Direct Write
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