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Solar & Alternative Energy

Laser system for drilling wafer-based solar cells


With the development of the JENOPTIK-VOTAN™ Solas 1800, Jenoptik is expanding its activities in the photovoltaic market, combining laser technology know-how in all aspects of the JenLas® disk IR50 disk laser with complex system technology. Based on its expertise along the entire added value chain -- from laser process through to finished production facility for a wide range of laser material processing tasks -- the Jenoptik Lasers & Material Processing division developed a laser processing machine for drilling minute through holes in wafers for solar cells.

The compact laser machine JENOPTIK-VOTAN™ Solas 1800 enables the drilling of up to 100 holes into crystalline solar cells for back side contacts (metal wrap through technology) within one second. Through application of the specially developed disk laser JenLas® disk IR50 it is possible to create holes (perkussion) without micro-cracks and debris (< 10 µm) which increases processing quality and reduces susceptibility to breaking.

The laser beam is delivered via scanner. A positioning accuracy of ± 10 µm is achieved. The system concept includes the installation as a stand-alone solution (charging via cassette/carrier) as well as an integration into manufacturing lines (in-line). The realization of the MWT concept by creating precise drilled holes using the JENOPTIK-VOTAN™ Solas 1800 offers the following benefits:

  • Rapid processing speed
  • Contactless drilling
  • Excellent hole quality without micro-cracks and debris
  • Freely programmable hole position