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  • ICALEO 2009 Paper #M1104 (High Rate Laser Drilling and Texturing of Silicon)

    High Rate Laser Drilling and Texturing of Silicon
    Authors:
    Henrikki Pantsar, Fraunhofer USA; Plymouth MI USA
    Tim Lauterborn, Frauhofer Usa, Inc.; Plymouth MI USA
    Annerose Knorz, Fraunhofer Institute for Solar Energy Systems; Freiburg Germany
    Hans Herfurth, Fraunhofer Usa, Inc.; Plymouth MI USA
    Stefan Heinemann, Fraunhofer Usa, Inc.; Plymouth MI USA
    Presented at ICALEO 2009

    Laser technology offers various opportunities for solar cell manufacturing. The key success factor for many of these is processing velocity. Applications such as surface texturing for light trapping and drilling for wrap through emitters require substantial amounts of featur...

    $28.00

  • ICALEO 2009 Paper #M1105 (Cutting Performance Comparison Between Low Power LPSS and sm Fiber Laser for Mono and Polycrystalline Silicon Wafers)

    Cutting Performance Comparison Between Low Power LPSS and sm Fiber Laser for Mono and Polycrystalline Silicon Wafers
    Authors:
    Mohammed Naeem, GSI Group, Inc. - Laser Division; Rugby Great Britain
    Presented at ICALEO 2009

    Silicon is widely used in a number of industries but primarily in solar cells and in semiconductor manufacture, with growing applications in jewelry and entertainment goods. In the majority of applications the source material is in the form of wafers which are typically 0.2-1.5mm (thick and 100-300mm diameter. From the flat faces of the octagons they laser cut a flat rectangular wafer that is then further processed to become a solar cell. Cutting speed and yield are important ...

    $28.00

  • ICALEO 2009 Paper #M1106 (Lasers in the Green Revolution)

    Lasers in the Green Revolution
    Authors:
    Jie Fu, J P Sercel Associates, Inc.; Manchester NH USA
    Marco Mendes, J P Sercel Associates, Inc.; Manchester NH USA
    Xiangyang Song, J P Sercel Associates, Inc.; Manchester NH USA
    Cristian Porneala, J P Sercel Associates, Inc.; Manchester NH USA
    Matt Hannon, J P Sercel Associates, Inc.; Manchester NH USA
    Jeff Sercel, J P Sercel Associates, Inc.; Manchester NH USA
    Presented at ICALEO 2009

    Lasers are becoming increasingly important in the current global green revolution. Two areas of particular importance are light-emitting diodes (LEDs) and solar cells. LEDs are poised to revolutionize the gen...

    $28.00

  • ICALEO 2009 Paper #M1107 (Optimization of the Structuring Processes of CI(G)S Thin-Film Solar Cells with an Ultrafast Picosecond Laser and a Special Beam Shaping Optics)

    Optimization of the Structuring Processes of CI(G)S Thin-Film Solar Cells with an Ultrafast Picosecond Laser and a Special Beam Shaping Optics
    Authors:
    Erwin Steiger, Steiger LaserService; Maisach Germany
    Michael Scharnagl, High Q Laser Innovation GmbH; Hohenems Austria
    Matthias Kemnitzer, Munich University of Applied Sciences; Munchen Germany
    Alexander Laskin, MolTech GmbH; Berlin Germany
    Presented at ICALEO 2009

    Low cost CuIn(Ga)Se2 (CI(G)S), CdTe and GaAs thin film solar cells with photosensitive film thicknesses in the range of a few microns - either on thick flat glass substrates or thin flexible substrates like plastic or metal foils - are gaining gr...

    $28.00

  • ICALEO 2009 Paper #M1108 (The Effective Energy Efficiency and the Over Filling Factor of Thin Film Ablation Process with Lasers of Different Beam Shape)

    The Effective Energy Efficiency and the Over Filling Factor of Thin Film Ablation Process with Lasers of Different Beam Shape
    Authors:
    Keming Du, EdgeWave GmbH; Wurselen Germany
    Presented at ICALEO 2009

    Structuring and patterning of thin layer via selective laser ablation is one of the key technologies in production of display and photovoltaic. Concurrently, there are two ablation processes used in production of thin film solar: Scribing via selective ablation and edge isolation via deletion. Beside the wave length, the pulse length and the peak power, the beam profile of the laser is of essential importance for the efficiency of the ablation process and for the productivity. The most currently...

    $28.00

  • ICALEO 2009 Paper #M1109 (Superior Laser Processing with Flat Top Profiles in Solar Cell Technology)

    Superior Laser Processing with Flat Top Profiles in Solar Cell Technology
    Authors:
    Oliver Homburg, Limo Lissotschenko Mikrooptik Gmbh; Dortmund Germany
    Benita Braun, -; -
    Ulrich Jager, -; -
    Friedrich Lottspeich, -; -
    Andreas Grohe, -; -
    Thomas Mitra, -; -
    Presented at ICALEO 2009

    Direct laser patterning of various materials has found its way into several micro-system production lines like inkjet printing, solar cell technology, flat-panel display production, semiconductors and medical treatment. Typically, TEM00 single-mode solid state lasers and their higher harmonics are used, especially for machining of holes and trenches....

    $28.00

  • ICALEO 2009 Paper #M202 (Adaptive Spatio-Temporal Techniques for Smart Ultrafast Laser Processing of Optical Glasses (Invited Presentation, 30 minutes))

    Adaptive Spatio-Temporal Techniques for Smart Ultrafast Laser Processing of Optical Glasses (Invited Presentation, 30 minutes)
    Authors:
    Razvan Stoian, Laboratoire Hubert Curien; Saint Etienne France
    Alexandre Mermillod-Blondin, -; -
    Cyril Mauclair, -; -
    Guanghua Cheng, -; -
    Konstantin Mishchik, -; -
    Arkadi Rosenfeld, -; -
    Nadezhda M. Bulgakova, -; -
    Yuri P. Meshcheryakov, -; -
    Eric Audouard, -; -
    Ingolf V. Hertel, -; -
    Presented at ICALEO 2009

    Ultrafast lasers emerged as efficient tools to process transparent materials on minimal scales. Localized refractive index change...

    $28.00

  • ICALEO 2009 Paper #M205 (Femtosecond Laser Pulse Ablation of Polyurea Areogel)

    Femtosecond Laser Pulse Ablation of Polyurea Areogel
    Authors:
    Qiumei Bian, ; Manhattan KS USA
    Shouyuan Chen, Kansas State University; Manhattan KS USA
    Zenghu Chang, Kansas State University; Manhattan KS USA
    Shuting Lei, Kansas State University; Manhattan KS USA
    Presented at ICALEO 2009

    Femtosecond laser pulses with pulse trains of different repetition rates are employed in micromachining of a polyurea aerogel material. By varying the pulse number in a pulse train and the repetition rate of the pulse train, we investigate their effects on the ablation surface morphology of the polyurea aerogels. The heat accumulating in the polymer material can be prevented...

    $28.00

  • ICALEO 2009 Paper #M206 (Material Removal Rates in Ultra-high-speed Micro Machining using a Picosecond Laser)

    Material Removal Rates in Ultra-high-speed Micro Machining using a Picosecond Laser
    Authors:
    Tero Kumpulainen, Tampere University of Technology; Tampere Finland
    Ilpo Karjalainen, Tampere University of Technology; Tampere Finland
    Reijo Tuokko, Tampere University of Technology; Tampere Finland
    Presented at ICALEO 2009

    Ultrashort pulse lasers combined with megahertz level repetition rates allow use of higher production speeds without that sequent pulses do not overlap. The experiments were conducted on stainless steel and brass samples with several different velocities up to about 30 m/s with 1 and 2 MHz repetition rates. The material removal rates were analyzed from the ...

    $28.00

  • ICALEO 2009 Paper #M208 (High Quality Machining of Non-Metals with a Picosecond Laser)

    High Quality Machining of Non-Metals with a Picosecond Laser
    Authors:
    B.R. Campbell, Penn State Electro-Optics Center; Freeport PA USA
    J. A. Moore, Penn State Electro-Optics Center; Freeport PA USA
    T. M. Lehecka, Penn State Electro-Optics Center; Freeport PA USA
    J. G. Thomas, Penn State Electro-Optics Center; Freeport PA USA
    V. V. Semak, Penn State Electro-Optics Center; Freeport PA USA
    Presented at ICALEO 2009

    Using a commercial picosecond laser system, experiments were performed to cleanly machine non-metals and measure material removal rates. The laser was operated at 532 and 355 nm using a unique pulse format and a galvo scanner to transl...

    $28.00

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