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Proceedings Paper

Optimizing laser beam profiles using micro-lens arrays for efficient material processing: applications to solar cells
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Paper Abstract

High power laser sources are used in various production tools for microelectronic products and solar cells, including the applications annealing, lithography, edge isolation as well as dicing and patterning. Besides the right choice of the laser source suitable high performance optics for generating the appropriate beam profile and intensity distribution are of high importance for the right processing speed, quality and yield. For industrial applications equally important is an adequate understanding of the physics of the light-matter interaction behind the process. In advance simulations of the tool performance can minimize technical and financial risk as well as lead times for prototyping and introduction into series production. LIMO has developed its own software founded on the Maxwell equations taking into account all important physical aspects of the laser based process: the light source, the beam shaping optical system and the light-matter interaction. Based on this knowledge together with a unique free-form micro-lens array production technology and patented micro-optics beam shaping designs a number of novel solar cell production tool sub-systems have been built. The basic functionalities, design principles and performance results are presented with a special emphasis on resilience, cost reduction and process reliability.

Paper Details

Date Published: 24 February 2009
PDF: 15 pages
Proc. SPIE 7202, Laser-based Micro- and Nanopackaging and Assembly III, 72020U (24 February 2009); doi: 10.1117/12.809270
Show Author Affiliations
Dirk Hauschild, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Oliver Homburg, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Thomas Mitra, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Mikhail Ivanenko, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Manfred Jarczynski, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Jens Meinschien, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Andreas Bayer, LIMO Lissotschenko Mikrooptik GmbH (Germany)
Vitalij Lissotschenko, LIMO Lissotschenko Mikrooptik GmbH (Germany)

Published in SPIE Proceedings Vol. 7202:
Laser-based Micro- and Nanopackaging and Assembly III
Wilhelm Pfleging; Yongfeng Lu; Kunihiko Washio; Willem Hoving; Jun Amako, Editor(s)

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