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  • ICALEO 2010 Paper #M701 (Optimization of UV Laser Scribing Process for LED Sapphire Wafers)

    Optimization of UV Laser Scribing Process for LED Sapphire Wafers
    Authors:
    Ashwini Tamhankar, Spectra-Physics Lasers, Newport Corporation; Santa Clara CA USA
    Rajesh Patel, Spectra-Physics Lasers, Newport Corporation; Santa Clara CA USA
    Presented at ICALEO 2010

    Billions of LEDs are used today in traffic control, automotive headlights, flat panel display technology, mobile devices, back lighting, projection and general illumination applications. With the dramatic growth in LEDs, manufacturers are looking for technologies to increase production yield and decrease cost. Sapphire wafer singulation into miniature dies is one of the critical steps used in blue/green LED manufacturing. Typ...

    $28.00

  • ICALEO 2010 Paper #M604 (Pulse Shape Control of a MOPA Fiber Laser for Marking of Stainless Steel and Other Materials)

    Pulse Shape Control of a MOPA Fiber Laser for Marking of Stainless Steel and Other Materials
    Authors:
    Sami Hendow, Multiwave Photonics, R. Eng.; Maia Portugal
    Paulo T. Guerreiro, Multiwave Photonics, R. Eng.; Maia Portugal
    Niels Schilling, Fraunhofer Institute IWS Dresden; Dresden Germany
    Jan Rabe, Fraunhofer Institute IWS Dresden; Dresden Germany
    Presented at ICALEO 2010

    MOPA Fiber laser is used to demonstrate controlled ablation of metals, silicon and thin film materials using both the single-pulse as well as double-pulse laser format. Double pulsing is where the energy of one pulse is split into two succeding pulses. Ablation of silicon, metals and ce...

    $28.00

  • ICALEO 2010 Paper #M603 (Application of a Pulse Programmable Fiber Laser to a Broad Range of Micro-Processing Applications)

    Application of a Pulse Programmable Fiber Laser to a Broad Range of Micro-Processing Applications
    Authors:
    M. Rekow, PyroPhotonics Lasers Inc.; Campbell CA USA
    R. Murison, PyroPhotonics Lasers Inc.; Campbell CA USA
    Tullio Panarello, PyroPhotonics Lasers Inc.; Campbell CA USA
    C. Dunskey, Aeos Consulting Inc.; Los Gatos CA USA
    C. Dinkel, Industrial Materials Institute, Centre for Automotive Materials and Manufacturing, National Research Council of Canada; 800 Collip Circle ON Canada
    S. Nikumb, Industrial Materials Institute, Centre for Automotive Materials and Manufacturing, National Research Council of Canada; London ON Canada
    Presented at ...

    $28.00

  • ICALEO 2010 Paper #M601 (Laser Ablation by Optical Vortex Beams )

    Laser Ablation by Optical Vortex Beams
    Authors:
    Takashige Omatsu, Graduate School of Advanced Integration Science, Chiba University; Chiba
    Presented at ICALEO 2010

    Metal laser ablation using nanosecond optical vortex pulses with orbital angular momentum was performed. Optical vortex was capable of providing energy and cost saving material processing with less debris. Microneedle fabrication on a metal surface based on optical vortex laser ablation was also demonstrated. The resulting needle showed a height of at least 10 m above the target surface and a tip diameter of less than 0.3 m.

    $28.00

  • ICALEO 2010 Paper #M509 (Laser Materials Synthesis of a Wide Bandgap Energy Converter with Embedded Concentrator and Dc-Ac Inverter)

    Laser Materials Synthesis of a Wide Bandgap Energy Converter with Embedded Concentrator and Dc-Ac Inverter
    Authors:
    A. Kar, University of Central Florida CREOL SoO; Orlando FL USA
    Nathaniel Quick, AppliCote Associates LLC; Lake Mary FL USA
    Presented at ICALEO 2010

    The laser materials synthesis building blocks to process an embedded lens and inverter circuit in a wide bandgap material direct energy converter are presented. A single crystalline silicon carbide wafer is wide area laser doped with aluminum, chromium, selenium and nitrogen to optimize conversion of electromagnetic radiation to electrical energy. The laser doping process is based on solid state diffusion at temperatu...

    $28.00

  • ICALEO 2010 Paper #M508 (Investigations on the Laser Induced Polymerization of Organic-Inorganic Hybrid Oligomers for Micro Stereo Lithography Applications)

    Investigations on the Laser Induced Polymerization of Organic-Inorganic Hybrid Oligomers for Micro Stereo Lithography Applications
    Authors:
    Andre Neumeister, Laser Zentrum Hannover e.V. (LZH); Hannover Germany
    Martina Carsjens, Laser Zentrum Hannover e.V. (LZH); Hannover Germany
    Florian Pape, Leibniz Universitaet Hannover, Institut fuer Mikroproduktionstechnik (IMPT); Garbsen Germany
    Lutz Rissing, Leibniz Universitaet Hannover, Institut fuer Mikroproduktionstechnik (IMPT); Garbsen Germany
    Rainer Kling, Laser Zentrum Hannover e.V. (LZH); Hannnover Germany
    Presented at ICALEO 2010

    For Micro Stereolithography applications, the correlation between...

    $28.00

  • ICALEO 2010 Paper #M507 (Laser Microprocessing Powered by UV Photons)

    Laser Microprocessing Powered by UV Photons
    Authors:
    Ralph Delmdahl, Coherent Gmbh; Goettingen Germany
    Rainer Paetzel, Coherent Gmbh; Goettingen Germany
    Presented at ICALEO 2010

    Lasers with ultraviolet (UV) output offer unique benefits for processing a wide range of materials. In particular, the short wavelength, high energy UV photons experience less diffraction than longer visible or infrared wavelengths, which enables materials processing at higher spatial resolution. In addition, UV lasers micromachine primarily by non-thermal means, thus minimizing the heat affected zone due to processing.
    Excimer lasers emitting in the UV region deliver pulse energies scalable up to 1000 mJ ...

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  • ICALEO 2010 Paper #M506 (Laser-Induced Plasma Investigations during Material Processing)

    Laser-Induced Plasma Investigations during Material Processing
    Authors:
    David Diego-Vallejo, Technische Universitat Berlin, Institut fur Optik und Atomare Physik; Berlin Germany
    David Ashkenasi, Laser und Medizin-Technologie Berlin; Berlin Germany
    Hans Joachim Eichler, Technical University of Berlin, Optics Institute; Berlin Germany
    Gerd Illing, Laser und Medizin-Technologie Berlin GmbH; Berlin Germany
    Presented at ICALEO 2010

    Laser-induced breakdown spectroscopy (LIBS), a versatile analytical tool used to determine sample compositions, has recently been applied to monitor and control of laser material processing. By observing the induced plasma during las...

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  • ICALEO 2010 Paper #M505 (Picosecond Laser 4-Beams Interference Ablation of Metal Films for Microstructuring)

    Picosecond Laser 4-Beams Interference Ablation of Metal Films for Microstructuring
    Authors:
    B. Voisiat, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
    M. Gedvilas, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
    G. Raciukaitis, Laboratory for Applied Research, Center for Physical Science and Technology; Vilnius Lithuania
    Presented at ICALEO 2010

    Interfering of laser beams with the high pulse energy gives an opportunity to direct structuring over large areas. We report results of the laser beam interference ablation (LBIA) of thin metal film on the glass substrate irradiated b...

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  • ICALEO 2010 Paper #M504 (Fabrication of Hierarchical Microstructures on Metals by Means of Direct Laser Interference Patterning)

    Fabrication of Hierarchical Microstructures on Metals by Means of Direct Laser Interference Patterning
    Authors:
    Matthias Bieda, Fraunhofer Institute for Material and Beam Technology; Dresden Germany
    Andres Lasagni, Fraunhofer Institute for Material and Beam Technology; Dresden Germany
    Eckhard Beyer, University of Technology Dresden, Institute for Surface and Production Technology; Dresden Germany
    Presented at ICALEO 2010

    We have studied the fabrication of hierarchical periodic microstructures on metals by means of Direct Laser Interference Patterning. A nanosecond pulsed Nd:YAG laser at 355 nm wavelength was used to produce the microstructures with grating periods rang...

    $28.00

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