METHOD FOR LASER ABLATION OF SOLAR CELLS

摘要

A method and device for ablation of thin layers on the rim region of the surface of a plane substrate coated with a thin film. The rim region runs along the edge or edges of the substrate, and the thin layers should be ablated in at least two, not necessarily unconnected areas of the rim region along edge pieces not parallel to one another. A laser beam is pointed toward an ablation area. The areas of the rim region to be ablated are guided through the area so that in a plane of the surface of the substrate, during the whole ablation process, there is basically a constant distance in the space that lies partly in the ablation area and has its starting point outside the substrate surface and its end point within the substrate surface.