• ICALEO 2008 Paper #M503 (Excimer Laser Induced Microstructures on the Surface of Free Standing Gallium Nitride Wafers)

    Excimer Laser Induced Microstructures on the Surface of Free Standing Gallium Nitride Wafers
    Authors:
    D. Thomas, Department of Physics; Basel Switzerland
    F. Parker, National Centre for Laser Applications (NCLA); Galway Ireland
    A Dixit, National Centre for Laser Applications (Ncla); Galway Ireland
    U. Prendergast, NCLA; Galway Ireland
    A. Conneely, NCLA; Galway Ireland
    G.M. O'Connor, NCLA; Galway Ireland
    D. O'Mahony, Tyndall National Institute; Cork Ireland
    B. Corbett, Tyndall National Institute; Cork Ireland
    Presented at ICALEO 2008

    Gallium Nitride (GaN) is an important material as GaN based devices have re...

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  • ICALEO 2008 Paper #M504 (Influence of Laser Wavelength and Pulse Duration on Processing of Crystalline Silicon)

    Influence of Laser Wavelength and Pulse Duration on Processing of Crystalline Silicon
    Authors:
    Oliver Haupt, Laser Zentrum Hannover e.V.; Hannover Germany
    Aart Schoonderbeek, Laser Zentrum Hannover E.V.; Hannover Germany
    Lars Richter, Laser Zentrum Hannover E.V.; Hannover Germany
    Rainer Kling, Laser Zentrum Hannover E.V.; Hannover Germany
    Andreas Ostendorf, Laser Zentrum Hannover E.V.; Hannover Germany
    Presented at ICALEO 2008

    The paper discusses the fundamental interaction between laser light and crystalline silicon within a broad range of laser parameters like wavelength and pulse length with relevance for cutting and drilling. For laser pro...

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  • ICALEO 2008 Paper #M505 (The Effects of Multiple Passes of a Gaussian Laser Beam to Cure Silver Loaded Polymeric Inks)

    The Effects of Multiple Passes of a Gaussian Laser Beam to Cure Silver Loaded Polymeric Inks
    Authors:
    Taku Sato, The Universtiy of Liverpool; Liverpool Great Britain
    Daniel Wellburn, The University of Liverpool; Liverpool Great Britain
    Eamonn Fearon, The University of Liverpool; Liverpool Great Britain
    Ken Watkins, The University of Liverpool; Liverpool Great Britain
    Geoff Dearden, The University of Liverpool; Liverpool Great Britain
    Presented at ICALEO 2008

    Particulate silver inks are finding increasing use in the direct manufacture of electronic circuitry. Laser curing of these inks as opposed to traditional oven-curing methods is advantageo...

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  • ICALEO 2008 Paper #M506 (Laser Micromachining of Microchannel Branching Networks into Silicon with a Femtosecond Fiber Laser)

    Laser Micromachining of Microchannel Branching Networks into Silicon with a Femtosecond Fiber Laser
    Authors:
    DongHyuck Kam, University of Michigan; Ann Arbor MI USA
    Lawrence Shah, Imra America, Inc.; Ann Arbor MI USA
    Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
    Presented at ICALEO 2008

    We describe rapid prototyping of a micro-channel branching network into silicon wafer with a femtosecond pulsed fiber laser. The branching network is designed as a blood oxygenator. This network bifurcates according to Murrays Law over 11 generations with depths ranging from 20µm to 200µm, and satisfies the necessity of equal path lengths. In development of such micro-f...

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  • ICALEO 2008 Paper #M507 (Laser Microvia Drilling and Ablation of Silicon using 355 Nm Pico and Nanosecond Pulses)

    Laser Microvia Drilling and Ablation of Silicon using 355 Nm Pico and Nanosecond Pulses
    Authors:
    Henrikki Pantsar, Fraunhofer Center for Laser Technology; Plymouth MI USA
    Hans Herfurth, Fraunhofer Usa, Inc. Center for Laser Technology; Plymouth MI USA
    Stefan Heinemann, Fraunhofer Usa, Inc. Center for Laser Technology; Plymouth MI USA
    Petri Laakso, Vtt Technical Research Centre of Finland; Lappeenranta Finland
    Raimo Penttila, Vtt Technical Research Centre of Finland; Lappeenranta Finland
    Yi Liu, Wayne State University; Detroit MI USA
    Golam Newaz, Wayne State University; Detroit MI USA
    Presented at ICALEO 2008

    Laser abl...

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  • ICALEO 2008 Paper #M601 (Laser Welding of Shape Memory Alloys for Medical Applications)

    Laser Welding of Shape Memory Alloys for Medical Applications
    Authors:
    Ronny Pfeifer, Laser Zentrum Hannover E.V.; Hannover Germany
    Dirk Herzog, Laser Zentrum Hannover e.V.; Hannover Germany
    Andreas Ostendorf, Laser Zentrum Hannover e.V.; Hannover Germany
    Oliver Meier, Laser Zentrum Hannover E.V.; Hannover Germany
    Heinz Haferkamp, Laser Zentrum Hannover E.V.; D 30419 Germany
    Thomas Goesling, Medizinische Hochschule Hannover; Hannover Germany
    Christian Muelller, Medizinische Hochschule Hannover; Hannover DC Germany
    Christof Hurschler, Medizinische Hochschule Hannover; Hannover Germany
    Presented at ICALEO 2008
    <...>

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  • ICALEO 2008 Paper #M604 (Investigation into the Efficacy of Co2 Lasers for Modifying the Factors Influencing Biocompatibility of a Polymeric Biomaterial in Comparison with an F2 Excimer Laser)

    Investigation into the Efficacy of Co2 Lasers for Modifying the Factors Influencing Biocompatibility of a Polymeric Biomaterial in Comparison with an F2 Excimer Laser
    Authors:
    David Waugh, Loughborough University; Loughborough Great Britain
    Jonathan Lawrence, Loughborough University; Loughborough Great Britain
    C.D. Walton, University of Hull; Kingston-Upon-Hull Great Britain
    R.B. Zakaria, University of Hull; Kingston-Upon-Hull Great Britain
    Presented at ICALEO 2008

    Enhancement of the biocompatibility of a material by means of laser radiation has been amply demonstrated previously. Due to efficient absorption of the energy, short wavelengths and energies pe...

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  • ICALEO 2008 Paper #M605 (Laser Controlled Multifunctionalization of Polymer Surfaces for Industrial Applications)

    Laser Controlled Multifunctionalization of Polymer Surfaces for Industrial Applications
    Authors:
    Katja Samm, Laser Zentrum Hannover e.V.; Hanover Germany
    Satyanarayana Gollapudi, Laser Zentrum Hannover E.V.; Hanover Germany
    Ulrich Klug, Laser Zentrum Hannover E.V.; Hanover Germany
    Andreas Ostendorf, Laser Zentrum Hannover E.V.; Hanover Germany
    Rainer Kling, Laser Zentrum Hannover E.V.; Hanover Germany
    Presented at ICALEO 2008

    The use of Laser Modification - Direct Writing (LaM-DW) to generate multifunctional surfaces on polymers like polyimide, polyethylene, polycarbonate and silicone is investigated. Polymers have applications in textiles, mi...

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  • ICALEO 2008 Paper #M606 (Laser Cladding of Ti-Nb Alloy on Mild Steel using Fiber Laser)

    Laser Cladding of Ti-Nb Alloy on Mild Steel using Fiber Laser
    Authors:
    Amir Khajepour, University of Waterloo; Waterloo ON Canada
    Vahid Fallah, University of Waterloo; Waterloo ON Canada
    Stephen Corbin, University of Waterloo; Waterloo ON Canada
    Presented at ICALEO 2008

    Low elastic modulus, superior corrosion resistant, significantly reduced field of ignition and high biocompatibility of Ti-45Nb have attracted a wide interest for various applications including medical implants, highly corrosive and oxygenated environments such as autoclaves, pressure vessels and heat exchangers. Furthermore, clad metal constructions offer a considerable cost reduction for equipment of...

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  • ICALEO 2008 Paper #M607 (Laser Cutting for Medical Device (Stent) - Yesterday, Today and Tomorrow (Invited Presentation - 40 Minutes))

    Laser Cutting for Medical Device (Stent) - Yesterday, Today and Tomorrow (Invited Presentation - 40 Minutes)
    Authors:
    Li Chen, Abbott Vascular; Santa Clara CA USA
    Presented at ICALEO 2008

    Lasers are commonly used for welding; drilling, cutting, marking, and other material processing. One of the more demanding industrial laser applications is micro cutting. Laser cutting stent is a typical micro cutting application in the medical device industry. A stent is a small, mesh-like device made of metal. When a stent is placed inside of a coronary artery, it acts as a support or scaffold, keeping the vessel open. By keeping the vessel open, the stent helps to improve blood flow to the heart muscle and ...

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