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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper CThH4

Laser-induced forward transfer of carbon and chromium films in gases of one atmosphere pressure

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Abstract

The "Laser-Induced Forward Transfer" (LIFT) technique' utilizes pulsed laser irradiation to transfer a thin-film material from an "emitting" surface to a "collecting" surface. The film is initially on a substrate that is transparent to the laser, hence the laser is incident on the rear surface of this substrate and the emitting and collecting surfaces face each other. LIFT has been performed for metal films in vacuum;1 some recent work of LIFT in air has also been demonstrated.2-4 Here, we show for the first time that LIFT can produce patterned spots of desired thicknesses, and we also compare ambient gas of air versus helium at one atmosphere pressure. We utilize a focussed pulsed laser beam of high repetition rate to produce localized transfer from the emitting film to the collecting surface with high spatial resolution. The adjustment of the spot thickness is achieved by translating the emitting film after each laser pulse while keeping the irradiation spot and the collecting surface stationary.

© 1996 Optical Society of America

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