Abstract: The invention relates to a method for laser-structuring thin layers on a substrate in order to produce monolithically connected thin-layer solar cells, having the following steps:—providing a laser with a laser wavelength,—providing a substrate (1) which comprises a first side and a second side and which is transparent for the laser wavelength, said first side of the substrate has big a metal rear electrode thin layer (2), on which an absorber thin layer (3) for thin layer solar cells is arranged,—emitting a laser beam (L) onto the substrate, and—moving the laser beam (L) over the substrate (1) along a writing line and/or moving the substrate (1) relative to the laser beam (L) along a writing line.