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Role of thermal stresses on pulsed laser irradiation of thin films under conditions of microbump formation and nonvaporization forward transfer

Role of thermal stresses on pulsed laser irradiation of thin films under conditions of microbump formation and nonvaporization forward transfer
Role of thermal stresses on pulsed laser irradiation of thin films under conditions of microbump formation and nonvaporization forward transfer
This paper presents a theoretical analysis of the processes in thin solid films irradiated by short and ultrashort laser pulses in the regimes of film structuring and laser-induced forward transfer. The regimes are considered at which vaporization of the film materials is insignificant and film dynamics is governed mainly by mechanical processes. Thermoelastoplastic modeling has been performed for a model film in one- and two-dimensional geometries. A method has been proposed to estimate the height of microbumps produced by nanosecond laser irradiation of solid films. Contrary to femtosecond laser pulses, in nanosecond pulse regimes, stress waves across the film are weak and cannot induce film damage. The main role in laser-induced dynamics of irradiated films is played by radial thermal stresses which lead to the formation of a bending wave propagating along the film and drawing the film matter to the center of the irradiation spot. The bending wave dynamics depends on the hardness of the substrate underlying the film. The causes of the receiver substrate damage sometimes observed upon laser-induced forward transfer in the scheme of the direct contact between the film and the receiver are discussed.
0947-8396
521–529
Meshcheryakov, Yuri P.
e7855559-6f69-4258-9175-e8d0da4cff64
Shugaev, Maxim V.
9db9f407-710e-4e21-8ee5-f313dd62a643
Mattle, Thomas
3048b955-fea5-435e-9178-55519430fa28
Lippert, Thomas
33b81741-90df-48d6-bf3a-87b9231f4418
Bulgakova, Nadezhda M.
f77016c2-3505-436e-9151-c6a82a8598a2
Meshcheryakov, Yuri P.
e7855559-6f69-4258-9175-e8d0da4cff64
Shugaev, Maxim V.
9db9f407-710e-4e21-8ee5-f313dd62a643
Mattle, Thomas
3048b955-fea5-435e-9178-55519430fa28
Lippert, Thomas
33b81741-90df-48d6-bf3a-87b9231f4418
Bulgakova, Nadezhda M.
f77016c2-3505-436e-9151-c6a82a8598a2

Meshcheryakov, Yuri P., Shugaev, Maxim V., Mattle, Thomas, Lippert, Thomas and Bulgakova, Nadezhda M. (2013) Role of thermal stresses on pulsed laser irradiation of thin films under conditions of microbump formation and nonvaporization forward transfer. Applied Physics A, 113 (2), 521–529. (doi:10.1007/s00339-013-7563-0).

Record type: Article

Abstract

This paper presents a theoretical analysis of the processes in thin solid films irradiated by short and ultrashort laser pulses in the regimes of film structuring and laser-induced forward transfer. The regimes are considered at which vaporization of the film materials is insignificant and film dynamics is governed mainly by mechanical processes. Thermoelastoplastic modeling has been performed for a model film in one- and two-dimensional geometries. A method has been proposed to estimate the height of microbumps produced by nanosecond laser irradiation of solid films. Contrary to femtosecond laser pulses, in nanosecond pulse regimes, stress waves across the film are weak and cannot induce film damage. The main role in laser-induced dynamics of irradiated films is played by radial thermal stresses which lead to the formation of a bending wave propagating along the film and drawing the film matter to the center of the irradiation spot. The bending wave dynamics depends on the hardness of the substrate underlying the film. The causes of the receiver substrate damage sometimes observed upon laser-induced forward transfer in the scheme of the direct contact between the film and the receiver are discussed.

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More information

Published date: November 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 356430
URI: http://eprints.soton.ac.uk/id/eprint/356430
ISSN: 0947-8396
PURE UUID: f10960d7-98d8-4029-8e9e-1751e4631dcd

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Date deposited: 13 Sep 2013 10:30
Last modified: 14 Mar 2024 14:48

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Contributors

Author: Yuri P. Meshcheryakov
Author: Maxim V. Shugaev
Author: Thomas Mattle
Author: Thomas Lippert
Author: Nadezhda M. Bulgakova

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