Printing screen for screen printing of a solar cell electrode structure and method for screen printing a solar cell electrode structure with such a printing screen

摘要

The invention relates to a printing screen for the screen printing of a solar cell electrode structure having a planar electrode structure on a solar cell substrate (2) comprising a wire mesh fabric (1) clamped in a frame embedded in a structural layer (3), the structural layer (3) a plurality of printed image openings (10) which corresponds to a printable image of the solar cell electrode structure producible with the printing screen, and the structural layer (3) forms a structural layer plane on its printing screen underside facing the solar cell substrate (2). In the edge regions of the printed image openings (10) on the printing screen underside, the structural layer (3) has a sealing structure in the form of at least one bead (30) projecting out of the structural layer plane and / or at least one indentation (31) protruding into the structural layer plane. Furthermore, the invention relates to a method for the screen printing of a solar cell electrode structure on a solar cell substrate, comprising the following method steps: providing a solar cell substrate (2), providing the above-mentioned printing screen and knife coating a screen printing paste through the print image openings (10) of the printing screen onto the solar cell substrate ( 2).