title: Laser jetting of femto-liter metal droplets for high resolution 3D printed structures.
abstract: Laser induced forward transfer (LIFT) is employed in a special, high accuracy jetting regime, by adequately matching the sub-nanosecond pulse duration to the metal donor layer thickness. Under such conditions, an effective solid nozzle is formed, providing stability and directionality to the femto-liter droplets which are printed from a large gap in excess of 400 μm. We illustrate the wide applicability of this method by printing several 3D metal objects. First, very high aspect ratio (A/R > 20), micron scale, copper pillars in various configuration, upright and arbitrarily bent, then a micron scale 3D object composed of gold and copper. Such a digital printing method could serve the generation of complex, multi-material, micron-scale, 3D materials and novel structures.
authors.affiliation: Additive Manufacturing Lab, Orbotech Ltd. P.O. Box 215, Yavne 81101, Israel.|Racah Institute of Physics and the Harvey M. Kruger Family Center for Nano-science and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Zenou
authors.affiliation: Racah Institute of Physics and the Harvey M. Kruger Family Center for Nano-science and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Sa'ar
authors.affiliation: Additive Manufacturing Lab, Orbotech Ltd. P.O. Box 215, Yavne 81101, Israel.
authors.forename: Z
authors.initials: Z
authors.lastname: Kotler